Heating & Air Conditioning - Electrical Diagnostics — Jeep Grand Cherokee WK2 (2010-2013)

DIAGNOSTIC CODE INDEX

DTC	Description
B1000-92	A/C SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1003-92	PANEL MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1006-92	BI-LEVEL MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1009-92	RECIRCULATION SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B100C-92	FLOOR MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B100F-92	MIX MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1012-92	DEFROST MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1015-92	EBL / REAR DEFROST SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B101E-92	POWER ON/OFF SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1030-11	EVAPORATOR TEMPERATURE SENSOR - CIRCUIT SHORT TO GROUND
B1030-12	EVAPORATOR TEMPERATURE SENSOR - CIRCUIT SHORT TO BATTERY
B1037-92	AUTO SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1058-11	RECIRCULATION DOOR CONTROL - CIRCUIT SHORT TO GROUND
B1058-12	RECIRCULATION DOOR CONTROL - CIRCUIT SHORT TO BATTERY
B1058-13	RECIRCULATION DOOR CONTROL - CIRCUIT OPEN
B1058-2B	RECIRCULATION DOOR CONTROL - WIRES SHORTED TOGETHER
B1058-92	RECIRCULATION DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION
B105C-00	RECIRCULATION DOOR TRAVEL RANGE TOO SMALL
B105D-00	RECIRCULATION DOOR TRAVEL RANGE TOO LARGE
B1084-92	LEFT HEATED SEAT REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1087-92	RIGHT HEATED SEAT SWITCH INPUT - PERFORMANCE OR INCORRECT OPERATION
B10B2-00	A/C COOL DOWN TEST PERFORMANCE
B10E8-14	BLOWER MOTOR CONTROL - CIRCUIT SHORT TO GROUND OR OPEN
B10E8-12	BLOWER MOTOR CONTROL - CIRCUIT SHORT TO BATTERY
B1142-92	MODE UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1184-92	MAIN/LEFT TEMP UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1185-92	MAIN/LEFT TEMP DOWN SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1186-92	RIGHT TEMP UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1187-92	RIGHT TEMP DOWN SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1188-92	HEATED STEERING WHEEL SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B11C2-11	FRONT MODE DOOR 1 CONTROL - CIRCUIT SHORT TO GROUND
B11C2-12	FRONT MODE DOOR 1 CONTROL - CIRCUIT SHORT TO BATTERY
B11C2-13	FRONT MODE DOOR 1 CONTROL - CIRCUIT OPEN
B11C2-2B	FRONT MODE DOOR 1 CONTROL - WIRES SHORTED TOGETHER
B11C2-92	FRONT MODE DOOR 1 CONTROL - PERFORMANCE OR INCORRECT OPERATION
B11C3-00	FRONT MODE DOOR 1 TRAVEL RANGE TOO SMALL
B11C4-00	FRONT MODE DOOR 1 TRAVEL RANGE TOO LARGE
B11C8-11	RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO GROUND
B11C8-12	RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO BATTERY
B11C8-13	RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT OPEN
B11C8-2B	RIGHT TEMPERATURE DOOR CONTROL - WIRES SHORTED TOGETHER
B11CB-92	RIGHT TEMPERATURE DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION
B11C9-00	RIGHT TEMPERATURE DOOR TRAVEL TOO SMALL
B11CA-00	RIGHT TEMPERATURE DOOR TRAVEL TOO LARGE
B11CB-11	MAIN/LEFT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO GROUND
B11CB-12	MAIN/LEFT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO BATTERY
B11CB-13	MAIN/LEFT TEMPERATURE DOOR CONTROL - CIRCUIT OPEN
B11CB-2B	MAIN/LEFT TEMPERATURE DOOR CONTROL - WIRES SHORTED TOGETHER
B11CB-92	MAIN/LEFT TEMPERATURE DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION
B11CC-00	MAIN/LEFT TEMPERATURE DOOR TRAVEL TOO SMALL
B11CD-00	MAIN/LEFT TEMPERATURE DOOR TRAVEL TOO LARGE
B11D3-00	A/C COOLDOWN TEST PERFORMANCE - COMPRESSOR NOT ENGAGED
B11D5-00	A/C COOLDOWN TEST PERFORMANCE - EVAP TEMP SENSOR ERROR
B10D6-92	LEFT SEAT VENTILATION SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B10D7-92	RIGHT SEAT VENTILATION SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B11D9-92	BLOWER SPEED KNOB REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B11DA-96	ITOS CABIN TEMPERATURE SENSOR - COMPONENT INTERNAL FAILURE
B11DB-92	MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B11E9-92	LEFT TEMPERATURE KNOB REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B11EA-92	RIGHT TEMPERATURE KNOB REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION
B1600-11	LEFT SOLAR SENSOR - CIRCUIT SHORT TO GROUND
B1600-12	LEFT SOLAR SENSOR - CIRCUIT SHORT TO BATTERY
B1603-11	RIGHT SOLAR SENSOR - CIRCUIT SHORT TO GROUND
B1603-12	RIGHT SOLAR SENSOR - CIRCUIT SHORT TO BATTERY
B160F-11	TWILIGHT/AMBIENT LIGHT SENSOR INPUT - CIRCUIT SHORT TO GROUND
B160F-12	TWILIGHT/AMBIENT LIGHT SENSOR INPUT - CIRCUIT SHORT TO BATTERY
B210A-84	SYSTEM VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE
B210B-85	SYSTEM VOLTAGE HIGH - SIGNAL ABOVE ALLOWABLE RANGE
B210D-84	BATTERY VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE
B210E-85	BATTERY VOLTAGE HIGH - SIGNAL ABOVE ALLOWABLE RANGE
B2214-00	(HVAC) CLIMATE CONTROL INTERNAL
B222A-00	VEHICLE LINE MISMATCH
U0010-00	CAN INTERIOR BUS
U0141-00	LOST COMMUNICATION WITH IPM (FCM/TIPM)
U0155-00	LOST COMMUNICATION WITH CLUSTER/CCN
U0208	LOST COMMUNICATION WITH HEATED SEAT CONTROL MODULE

DIAGNOSTIC CODE INDEX

B1000-92-A/C SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

THEORY OF OPERATION

The HVAC A/C Heater Control contains various switches and knobs that are used to change the systems operation. There are currently three types of switches used depending on the configuration of the system. Push button momentary switches which are normally open or in the Off position. Multifunction or rotary switches which have several distinct positions and potentiometers which are a rotary variable resistor that is used for a more precise control. An active Diagnostic Trouble Code (DTC) indicates that either a control switch or potentiometer is stuck in an On position or out of a calibrated range. A stored DTC indicates that control switch or potentiometer was stuck On or out of calibration but has since returned to its normal state. For further information, refer to CONTROL, A/C AND HEATER , DESCRIPTION .

WHEN MONITORED

With the ignition on.

SET CONDITION

If the A/C On/Off Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

POSSIBLE CAUSES

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

DIAGNOSTIC TEST

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the A/C On/Off Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the A/C On/Off Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1003-92-PANEL MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Panel Mode Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Panel Mode Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Panel Mode Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1006-92-BI-LEVEL MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Bi-level Mode Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Bi-level Mode Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Bi-level Mode Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1009-92-RECIRCULATION SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Recirculation Mode Switch is stuck in a On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Recirculation Mode Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Recirculation Mode Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B100C-92-FLOOR MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Floor Mode Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Floor Mode Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Floor Mode Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B100F-92-MIX MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Mix Mode Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Mix Mode Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Mix Mode Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1012-92-DEFROST MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Defrost Mode Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Defrost Mode Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Defrost Mode Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1015-92-EBL / REAR DEFROST SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Electric Back light (EBL) Electronic Rear Defrost Switch is stuck in an On position for more than 20 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the (EBL) Electronic Rear Defrost Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the (EBL) Electronic Rear Defrost Switch being held in or stuck in an On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 20 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B101E-92-POWER ON/OFF SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Power On/Off Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Power On/Off Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Power On/Off Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

Scheme 1

Scheme 1: B1030-11-EVAPORATOR TEMPERATURE SENSOR - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The HVAC A/C heater control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C heater control to assure that they are in range. An active Diagnostic trouble Code (DTC) indicates that a sensor is out of range. A stored DTC indicates that the sensor was out of range but is currently within range.

The evaporator temperature sensor monitors the surface temperature of the A/C evaporator and supplies an input signal to the A/C heater control. The input signal value is used to optimize the A/C system performance and to protect the A/C evaporator from freezing. The evaporator temperature sensor resistance value will change in response to the surface temperature of A/C evaporator. The resistance value is electronically transferred to the A/C heater control using a sensor ground circuit and a 5-volt reference signal circuit. Normal operation of the sensor the resistive value decreases when the A/C evaporator temperature decreases and the sensor resistive value increases when the A/C evaporator temperature increases.

With the ignition on.

The A/C Heater Control detects a short to ground on the Evaporator Temperature Sensor Signal voltage input to the controller. If the A/C Heater Control detects a valid voltage, the DTC will change from active to stored and will stay stored for 100 ignition cycles.

Possible Causes
(C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
EVAPORATOR TEMPERATURE SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 2

Scheme 2: DIAGNOSTIC TEST

Scheme 3

CHECK IF THE DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 5 .
CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Evaporator Temperature Sensor harness connector. Measure the resistance between ground and the (C21) Evaporator Temperature Sensor Signal circuit. Is the resistance below 100k Ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO THE (C121) SENSOR GROUND CIRCUIT Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit. Is the resistance below 100k Ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to the (C121) Sensor Ground circuit. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE EVAPORATOR TEMPERATURE SENSOR Replace the Evaporator Temperature Sensor in Accordance with the Service Information. Refer to «SENSOR, EVAPORATOR TEMPERATURE , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Cycle the ignition off for 30 seconds then back on. With the scan tool, read HVAC DTCs. Does this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1030-12-EVAPORATOR TEMPERATURE SENSOR - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

The A/C Heater Control detects a short to voltage on the Evaporator Temperature Sensor Signal circuit. If the A/C Heater Control detects a valid voltage the DTC will change from active to stored and will stay stored for 100 ignition cycles.

Possible Causes
(C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL OPEN
(C121) SENSOR GROUND CIRCUIT OPEN
EVAPORATOR TEMPERATURE SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 4

Scheme 4: DIAGNOSTIC TEST

Scheme 5

Scheme 6

CHECK IF THE DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 6 .
CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Evaporator Temperature Sensor harness connector. Ignition on, engine not running. Measure the voltage of the (C21) Evaporator Temperature Sensor Signal circuit. Is there any voltage present? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between the A/C Heater Control C1 harness connector and the Evaporator Temperature Sensor harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C121) SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sensor Ground circuit between the A/C Heater Control C1 harness connector and the Evaporator Temperature Sensor harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C121) Sensor Ground circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE EVAPORATOR TEMPERATURE SENSOR Turn the ignition off to the lock position. Replace the Evaporator Temperature Sensor in Accordance with the Service Information. Refer to «SENSOR, EVAPORATOR TEMPERATURE , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Ignition on, engine not running. Using the scan tool, erase HVAC DTCs. Cycle the ignition off for 30 seconds then back on. With the scan tool, read HVAC DTCs. Does this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1037-92-AUTO SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Auto Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Auto Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Auto Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

Scheme 7

Scheme 7: B1058-11-RECIRCULATION DOOR CONTROL - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

After the initial installation of the A/C Heater Control, the controller is calibrated to each individual blend/mode door actuator. These calibrations are stored as in the number of pulses it takes to move the door from one stop to another. The A/C Heater Control drives the Door Actuators by the use of Door Driver circuit and a Common Door Driver circuit and monitors all door actuator pulses to detect door movement in both directions. Most of the door actuators share a common door driver circuit but each door actuator has its own unique driver circuit. Due to shared circuitry, similar Diagnostic Trouble Codes (DTCs) can set at the same time for multiple actuators depending upon the type of circuit malfunction, its location, and the direction the actuator is moving when the malfunction is present. For further information, refer to DESCRIPTION .

Continuously with the ignition on.

The A/C Heater Control detects a short to ground on the Recirculation Door Driver circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C32) RECIRCULATION DOOR DRIVER CIRCUIT SHORTED TO GROUND
(C34) COMMON DOOR DRIVER CIRCUIT SHORTED TO GROUND
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 8

Scheme 8: DIAGNOSTIC TEST

Scheme 9

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Recirculation Door Actuator harness connector. Measure the resistance between ground and the (C32) Recirculation Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the (C32) Recirculation Door Driver circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C34) Common Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the (C34) Common Door Driver circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE RECIRCULATION DOOR ACTUATOR Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1058-12-RECIRCULATION DOOR CONTROL - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects a short voltage on the Recirculation Door control circuit. If the A/C Heater Control detects a valid voltage, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C32) RECIRCULATION DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
(C34) COMMON DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 10

Scheme 10: DIAGNOSTIC TEST

Scheme 11

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Recirculation Door Actuator harness connector. Ignition on, engine not running. Measure the voltage of the (C32) Recirculation Door Driver circuit. Is there any voltage present? Yes Repair the (C32) Recirculation Door Driver circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C34) Common Door Driver circuit. Is there any voltage present? Yes Repair the (C34) Common Door Driver circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE RECIRCULATION DOOR ACTUATOR Turn the ignition off to the lock position. Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1058-13-RECIRCULATION DOOR CONTROL - CIRCUIT OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects an open in the Recirculation Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C32) RECIRCULATION DOOR DRIVER CIRCUIT OPEN
(C34) COMMON DOOR DRIVER CIRCUIT OPEN
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 12

Scheme 12: DIAGNOSTIC TEST

Scheme 13

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the Recirculation Door Actuator harness connector. Measure the resistance of the (C32) Recirculation Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C32) Recirculation Door Driver circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C34) Common Door Driver circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE RECIRCULATION DOOR ACTUATOR Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1058-2B-RECIRCULATION DOOR CONTROL - WIRES SHORTED TOGETHER

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects the control wiring shorted together in the Recirculation Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C32) RECIRCULATION DOOR DRIVER CIRCUIT SHORTED TO THE (C34) COMMON DOOR DRIVER CIRCUIT
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 14

Scheme 14: DIAGNOSTIC TEST

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 5 .
CHECK FOR A SHORT BETWEEN THE (C32) RECIRCULATION DOOR DRIVER CIRCUIT AND THE (C34) COMMON DOOR DRIVER CIRCUIT Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Recirculation Door Actuator harness connector. Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Common Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the short between (C32) Recirculation Door Driver circuit and the (C34) Common Door Driver circuit. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE RECIRCULATION DOOR ACTUATOR Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1058-92-RECIRCULATION DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

If the A/C Heater Control detects a overheat condition of the Integrated Circuit (IC) that controls the Recirculation Door Driver circuit. If the A/C Heater Control detects a valid temperature the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Allow the A/C Heater Control to cool down for five minutes then Go To 2 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B105C-00-RECIRCULATION DOOR TRAVEL RANGE TOO SMALL

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

The A/C Heater Control uses a pulse feedback to the controller to detect the total door movement range. If the amount of pulses required to move the door completely in both directions is less than what the controller has stored in its memory, this DTC will set. If an Actuator Calibration Test is performed and the A/C Heater Control detects a valid range of the door movement span in both directions, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
RELATED DTCS PRESENT
RECIRCULATION DOOR BINDING
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Are there any Door Control Circuit Open, Performance, or Short to Ground, Voltage, or Together DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 4 . No Go To 6 .
CHECK THE RECIRCULATION DOOR Remove the Recirculation Door Actuator and check the Recirculation Door for binding and full travel. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Were there any problems found? Yes Repair or replace the Recirculation Door as necessary in accordance with the Service Information. Refer to «HOUSING, HVAC , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE RECIRCULATION DOOR ACTUATOR Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Using the scan tool, erase HVAC DTCs. Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset during HVAC Actuator Calibration Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B105D-00-RECIRCULATION DOOR TRAVEL RANGE TOO LARGE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

The A/C Heater Control uses a pulse feedback to the controller to detect the total door movement range. If the amount of pulses required to move the door completely in both directions is greater than what the controller has stored in its memory, this DTC will set. If an Actuator Calibration Test is performed or during normal operation and the A/C Heater Control detects a valid range of the door movement span in both directions, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
RELATED DTCS PRESENT
RECIRCULATION DOOR STOPS
RECIRCULATION DOOR
RECIRCULATION DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. With the scan tool, read HVAC DTCs. Are there any Door Control Circuit Short to Voltage, Short to Ground or Open DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 4 . No Go To 6 .
CHECK THE RECIRCULATION DOOR Remove the Recirculation Door Actuator and check the Recirculation Door stops, linkage (stripped or cracked) and door. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Were there any problems found? Yes Repair or replace the Recirculation Door as necessary in accordance with the Service Information. Refer to «HOUSING, HVAC , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE RECIRCULATION DOOR ACTUATOR Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, RECIRCULATION DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1084-92-LEFT HEATED SEAT REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Left Heated Seat Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Left Heated Seat Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Left Heated Seat switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1087-92-RIGHT HEATED SEAT SWITCH INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Right Heated Seat Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Right Heated Seat Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Right Heated Seat switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B10B2-00-A/C COOL DOWN TEST PERFORMANCE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The A/C Heater Controller has software to enable it to perform an A/C Cool Down Test by a command using a scan tool. This test checks for evaporator temperature drop over a predetermined time. If the test fails, this DTC will set. However, certain test conditions are required to perform this test. Failure to run this test within those parameters can result in failure of the test.

With ever an A/C Cooldown Test is performed.

This DTC is set whenever the A/C Cooldown Test is performed and the desired temperature drop is not achieved by the system. The DTC will go to stored after a successful A/C Cooldown Test.

Possible Causes
A/C SYSTEM WORKING IMPROPERLY

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CONDITIONS FOR A/C COOLDOWN TEST The following condition must be met before running the A/C Cooldown test. No Powertrain Control Module (PCM) DTCs present. No Communication DTCs present. Condenser cooling fan working properly. No active HVAC evaporator temperature sensor, sun sensor, recirculation, mode, or blend door actuator DTCs present. The refrigerant system must be fully charged. The blower motor must operate correctly in all speeds. The evaporator temperature must be above 12.7° C (55° F). The A/C compressor must be turned off. Blower must be on high. Are all of the above conditions met before running the A/C Cooldown Test? Yes Go to the Service Information for additional Cooldown Test related diagnostic information and testing procedures and repair as necessary. Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . NOTE: Run the Cooldown Test again after any repairs are performed. If the Cooldown Test passes, testing is complete. No Run the A/C Cooldown test again with the above test conditions.

Scheme 15

Scheme 15: B10E8-14-BLOWER MOTOR CONTROL - CIRCUIT SHORT TO GROUND OR OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The A/C Heater Control constantly monitors the Blower Control circuit to the Blower Motor Power Module for proper operation. If the voltage or the Pulse Width Modulation (PWM) on that circuit drops below or rises above a predetermined value, a DTC will set. For further information, refer to MODULE, POWER, BLOWER MOTOR , OPERATION .

With the ignition on.

If the A/C Heater control detects the Blower Motor Control circuit Pulse Width Modulation (PWM) is less than 0% and or greater than 100% or PWM equals 100% for the period of 30 seconds.

Possible Causes
(C56) BLOWER CONTROL CIRCUIT SHORTED TO GROUND
(C56) BLOWER CONTROL CIRCUIT OPEN
(Z911) GROUND CIRCUIT OPEN
BLOWER MOTOR POWER MODULE
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 16

Scheme 16: DIAGNOSTIC TEST

Scheme 17

Scheme 18

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. NOTE: It can take up to 30 seconds or more for this DTC to mature. Is this DTC active? Yes Go To 2 . No Go To 6 .
CHECK THE (C56) BLOWER CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the Blower Motor Power Module C1 harness connector Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between ground and the (C56) Blower Control circuit. Is the resistance below 100k Ohms? Yes Repair the (C56) Blower Control circuit for an short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE (C56) BLOWER CONTROL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Measure the resistance of the (C56) Blower Control circuit between the A/C Heater Control harness connector and the Blower Motor Power Module harness connector. Is the resistance above 100k Ohms? Yes Repair the (C56) Blower Control circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (Z911) GROUND CIRCUIT FOR AN OPEN Using a 12-volt test light connected to 12 volts, check the (Z911) Ground circuit. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Repair the (Z911) Ground circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE BLOWER MOTOR POWER MODULE Turn the ignition off to the lock position. Replace the Blower Motor Power Module in accordance with the Service Information. Refer to «MODULE, POWER, BLOWER MOTOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did the DTC reset during or after the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B10E8-12-BLOWER MOTOR CONTROL - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the A/C Heater control detects the Blower Motor Control circuit Pulse Width Modulation (PWM) is less than 0% and or greater than 100% or PWM equals 0% for the period of 30 seconds.

Possible Causes
(C56) BLOWER CONTROL CIRCUIT SHORTED TO VOLTAGE
BLOWER MOTOR POWER MODULE
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 19

Scheme 19: DIAGNOSTIC TEST

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. NOTE: It can take up to 30 seconds or more for this DTC to mature. Is this DTC active? Yes Go To 2 . No Go To 4 .
CHECK THE (C56) BLOWER CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the Blower Motor Power Module C1 harness connector. Disconnect the A/C Heater Control C1 harness connector. Ignition on, engine not running. Measure the voltage of the (C56) Blower Control circuit. Is there and voltage present? Yes Repair the (C56) Blower Control circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE BLOWER MOTOR POWER MODULE Turn the ignition off to the lock position. Replace the Blower Motor Power Module in accordance with the Service Information. Refer to «MODULE, POWER, BLOWER MOTOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did the DTC reset during or after the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1142-92-MODE UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Up Mode Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Up Mode Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Up Mode Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1184-92-MAIN/LEFT TEMP UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Left Temperature Up Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Left Temperature Up Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Left Temperature Up Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1185-92-MAIN/LEFT TEMP DOWN SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Left Temperature Down Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Left Temperature Down Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Left Temperature Down Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1186-92-RIGHT TEMP UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Right Temperature Up Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Right Temperature Up Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Right Temperature Up Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1187-92-RIGHT TEMP DOWN SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Right Temperature Down Control Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Right Temperature Down Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Right Temperature Down Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B1188-92-HEATED STEERING WHEEL SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Heater Steering Wheel Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Heater Steering Wheel Control Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Heated Steering Wheel Control Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B11C2-11-FRONT MODE DOOR 1 CONTROL - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects a short to ground on the Mode Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C35) MODE DOOR DRIVER CIRCUIT SHORTED TO GROUND
(C807) COMMON DOOR DRIVER 2 CIRCUIT SHORTED TO GROUND
MODE DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 20

Scheme 20: DIAGNOSTIC TEST

Scheme 21

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Mode Door Actuator harness connector. Measure the resistance between ground and the (C35) Mode Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the (C35) Mode Door Driver circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C807) Common Door Driver 2 circuit. Is the resistance below 100k Ohms? Yes Repair the (C807) Common Door Driver 2 circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE MODE DOOR ACTUATOR Replace the Mode Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, MODE DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C2-12-FRONT MODE DOOR 1 CONTROL - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects a short voltage on the Mode Door control circuit. If the A/C Heater Control detects a valid voltage, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C35) MODE DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
(C807) COMMON DOOR DRIVER 2 CIRCUIT SHORTED TO VOLTAGE
MODE DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 22

Scheme 22: DIAGNOSTIC TEST

Scheme 23

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Mode Door Actuator harness connector. Ignition on, engine not running. Measure the voltage of the (C35) Mode Door Driver circuit. Is there any voltage present? Yes Repair the (C35) Mode Door Driver circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C807) COMMON DOOR DRIVER CIRCUIT 2 FOR A SHORT TO VOLTAGE Measure the voltage of the (C807) Common Door Driver 2 circuit. Is there any voltage present? Yes Repair the (C807) Common Door Driver 2 circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE MODE DOOR ACTUATOR Turn the ignition off to the lock position. Replace the Mode Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, MODE DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C2-13-FRONT MODE DOOR 1 CONTROL - CIRCUIT OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects an open in the Mode Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C35) MODE DOOR DRIVER CIRCUIT OPEN
(C807) COMMON DOOR DRIVER CIRCUIT OPEN
MODE DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 24

Scheme 24: DIAGNOSTIC TEST

Scheme 25

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C35) MODE DOOR DRIVER CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Mode Door Actuator harness connector. Measure the resistance of the (C35) Mode Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C35) Mode Door Driver circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C807) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C807) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C807) Common Door Driver circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE MODE DOOR ACTUATOR Replace the Mode Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, MODE DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C2-2B-FRONT MODE DOOR 1 CONTROL - WIRES SHORTED TOGETHER

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects the control wiring shorted together in the Mode Door control circuit. If the A/C Heater Control detects a valid amperage draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C35) MODE DOOR DRIVER CIRCUIT SHORTED TO THE (C807) COMMON DOOR DRIVER 2 CIRCUIT
MODE DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 26

Scheme 26: DIAGNOSTIC TEST

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 5 .
CHECK THE (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C807) COMMON DOOR DRIVER 2 CIRCUIT Turn the ignition off to the lock position. Disconnect the Mode Door Actuator harness connector. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C35) Mode Door Driver circuit and the (C807) Common Door Driver 2 circuit. Is the resistance below 100k Ohms? Yes Repair the (C35) Mode Door Driver circuit for a short to the (C807) Common Door Driver 2 circuit. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE MODE DOOR ACTUATOR Turn the ignition off to the lock position. Replace the Mode Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, MODE DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C2-92-FRONT MODE DOOR 1 CONTROL - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

If the A/C Heater Control detects a overheat condition of the Integrated Circuit (IC) that controls the Mode Door Driver circuit. If the A/C Heater Control detects a valid temperature the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Allow the A/C Heater Control to cool down for five minutes then go to 2 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C3-00-FRONT MODE DOOR 1 TRAVEL RANGE TOO SMALL

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

Possible Causes
RELATED DTCS PRESENT
MODE DOOR BINDING
MODE DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Are there any Door Control Circuit Open, Performance, or Short to Ground, Voltage, or Together DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 4 . No Go To 6 .
CHECK THE MODE DOOR Remove the Mode Door Actuator and check the Mode Door for binding and full travel. Were there any problems found? Yes Repair or replace the Mode Door as necessary in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE MODE DOOR ACTUATOR Replace the Mode Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, MODE DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Using the scan tool, erase HVAC DTCs. Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset during HVAC Actuator Calibration Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C4-00-FRONT MODE DOOR 1 TRAVEL RANGE TOO LARGE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

The A/C Heater Control uses a pulse feedback to the controller to detect the total door movement range. If the amount of pulses required to move the door completely in both directions is greater than what the controller has stored in its memory, this DTC will set. If an Actuator Calibration Test is performed or during normal operation and the A/C Heater Control detects a valid range of the door movement span in both directions, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
RELATED DTCS PRESENT
MODE DOOR STOPS
MODE DOOR
MODE DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. With the scan tool, read HVAC DTCs. Are there any Door Control Circuit Open, Performance, or Short to Ground, Voltage, or Together DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC System Test? Yes Go To 4 . No Go To 6 .
CHECK THE MODE DOOR Remove the Mode Door Actuator and check the Mode Door stops, linkage (stripped or cracked) and door. Were there any problems found? Yes Repair or replace the Mode Door as necessary in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE MODE DOOR ACTUATOR Replace the Mode Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, MODE DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C8-11-RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects a short to ground on the Passenger Blend Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C33) PASSENGER BLEND DOOR DRIVER CIRCUIT SHORTED TO GROUND
(C807) COMMON DOOR DRIVER 2 CIRCUIT SHORTED TO GROUND
PASSENGER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 27

Scheme 27: DIAGNOSTIC TEST

Scheme 28

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C33) PASSENGER BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Passenger Blend Door Actuator harness connector. Measure the resistance between ground and the (C33) Passenger Blend Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the (C33) Passenger Blend Door Driver circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C807) Common Door Driver 2 circuit. Is the resistance below 100k Ohms? Yes Repair the (C807) Common Door Driver 2 circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE PASSENGER BLEND DOOR ACTUATOR Replace the Passenger Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . Using the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C8-12-RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects a short voltage on the Passenger Blend Door control circuit. If the A/C Heater Control detects a valid voltage, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C33) PASSENGER BLEND DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
(C807) COMMON DOOR DRIVER 2 CIRCUIT SHORTED TO VOLTAGE
PASSENGER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 29

Scheme 29: DIAGNOSTIC TEST

Scheme 30

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C33) PASSENGER BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Passenger Blend Door Actuator harness connector. Ignition on, engine not running. Measure the voltage of the (C33) Passenger Blend Door Driver circuit. Is there any voltage present? Yes Repair the (C33) Passenger Blend Door Driver circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C807) Common Door Driver 2 circuit. Is there any voltage present? Yes Repair the (C807) Common Door Driver 2 circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE PASSENGER BLEND DOOR ACTUATOR Replace the Passenger Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C8-13-RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects an open in the Passenger Blend Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C33) PASSENGER BLEND DOOR DRIVER CIRCUIT OPEN
(C807) COMMON DOOR DRIVER 2 CIRCUIT OPEN
PASSENGER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 31

Scheme 31: DIAGNOSTIC TEST

Scheme 32

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C33) PASSENGER BLEND DOOR DRIVER CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Passenger Blend Door Actuator harness connector. Measure the resistance of the (C33) Passenger Blend Door Driver circuit between the A/C Heater Control C1 harness connector and the Passenger Blend Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C33) Passenger Blend Door Driver circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR AN OPEN Measure the resistance of the (C807) Common Door Driver 2 circuit between the A/C Heater Control C1 harness connector and the Passenger Blend Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C807) Common Door Driver 2 circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE PASSENGER BLEND DOOR ACTUATOR Replace the Passenger Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C8-2B-RIGHT TEMPERATURE DOOR CONTROL - WIRES SHORTED TOGETHER

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects the control wiring shorted together in the Passenger Blend Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C33) BLEND DOOR DRIVER CIRCUIT SHORTED TO THE (C807) COMMON DOOR DRIVER 2 CIRCUIT
PASSENGER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 33

Scheme 33: DIAGNOSTIC TEST

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 5 .
CHECK FOR A SHORT BETWEEN THE (C33) PASSENGER BLEND DOOR DRIVER CIRCUIT AND THE (C807) COMMON DOOR DRIVER 2 CIRCUIT Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Passenger Blend Door Actuator harness connector. Measure the resistance between the (C33) Passenger Blend Door Driver circuit and the (C807) Common Door Driver 2 circuit. Is the resistance below 100k Ohms? Yes Repair the short between (C33) Passenger Blend Door Driver circuit and the (C807) Common Door Driver 2 circuit. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE PASSENGER BLEND DOOR ACTUATOR Replace the Passenger Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CB-92-RIGHT TEMPERATURE DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

If the A/C Heater Control detects a overheat condition of the Integrated Circuit (IC) that controls the Passenger Blend Door Driver circuit. If the A/C Heater Control detects a valid temperature the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Allow the A/C Heater Control to cool down for five minutes then go to 2 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11C9-00-RIGHT TEMPERATURE DOOR TRAVEL TOO SMALL

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

Possible Causes
RELATED DTCS PRESENT
PASSENGER BLEND DOOR BINDING
PASSENGER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. With the scan tool, read HVAC DTCs. Are there any Door Control Circuit Open, Performance, or Short to Ground, Voltage, or Together DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 4 . No Go To 6 .
CHECK THE PASSENGER BLEND DOOR Remove the Passenger Blend Door Actuator and check the Passenger Blend Door for binding and full travel. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . Were there any problems found? Yes Repair or replace the Passenger Blend Door as necessary in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE PASSENGER BLEND DOOR ACTUATOR Replace the Passenger Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs. With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset during HVAC Actuator Calibration Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CA-00-RIGHT TEMPERATURE DOOR TRAVEL TOO LARGE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

The A/C Heater Control uses a pulse feedback to the controller to detect the total door movement range. If the amount of pulses required to move the door completely in both directions is greater than what the controller has stored in its memory, this DTC will set. If an Actuator Calibration Test is performed or during normal operation and the A/C Heater Control detects a valid range of the door movement span in both directions, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
RELATED DTCS PRESENT
PASSENGER BLEND DOOR STOPS
PASSENGER BLEND DOOR
PASSENGER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. With the scan tool, read HVAC DTCs. Are there any Door Control Circuit Open, Performance, or Short to Ground, Voltage, or Together DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC System Test? Yes Go To 4 . No Go To 6 .
CHECK THE PASSENGER BLEND DOOR Remove the Passenger Blend Door Actuator and check the Passenger Blend Door stops, linkage (stripped or cracked) and door. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . Were there any problems found? Yes Repair or replace the Passenger Blend Door as necessary in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE PASSENGER BLEND DOOR ACTUATOR Replace the Passenger Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CB-11-MAIN/LEFT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects a short to ground on the Driver Blend Door control circuit. If the A/C Heater Control detects valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C61) DRIVER BLEND DOOR DRIVER CIRCUIT SHORTED TO GROUND
(C34) COMMON DOOR DRIVER CIRCUIT SHORTED TO GROUND
DRIVER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 34

Scheme 34: DIAGNOSTIC TEST

Scheme 35

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C61) DRIVER BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Driver Blend Door Actuator harness connector. Measure the resistance between ground and the (C61) Driver Blend Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the (C61) Driver Blend Door Driver circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C34) Common Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the (C34) Common Door Driver circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE DRIVER BLEND DOOR ACTUATOR Replace the Driver Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . Using the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CB-12-MAIN/LEFT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects a short voltage on the Driver Blend Door control circuit. If the A/C Heater Control detects a valid voltage, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C61) DRIVER BLEND DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
(C34) COMMON DOOR DRIVER CIRCUIT SHORTED TO VOLTAGE
DRIVER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 36

Scheme 36: DIAGNOSTIC TEST

Scheme 37

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C61) DRIVER BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Driver Blend Door Actuator harness connector. Ignition on, engine not running. Measure the voltage of the (C61) Driver Blend Door Driver circuit. Is there any voltage present? Yes Repair the (C61) Driver Blend Door Driver circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C34) Common Door Driver circuit. Is there any voltage present? Yes Repair the (C34) Common Door Driver circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE DRIVER BLEND DOOR ACTUATOR Replace the Driver Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CB-13-MAIN/LEFT TEMPERATURE DOOR CONTROL - CIRCUIT OPEN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects an open in the Driver Blend Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C61) DRIVER BLEND DOOR DRIVER CIRCUIT OPEN
(C34) COMMON DOOR DRIVER CIRCUIT OPEN
DRIVER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 38

Scheme 38: DIAGNOSTIC TEST

Scheme 39

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 6 .
CHECK THE (C61) DRIVER BLEND DOOR DRIVER CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the Driver Blend Door Actuator harness connector. Measure the resistance of the (C61) Driver Blend Door Driver circuit between the A/C Heater Control C1 harness connector and the Driver Blend Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C61) Driver Blend Door Driver circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Driver Blend Door Actuator harness connector. Is the resistance above 1.0 Ohm? Yes Repair the (C34) Common Door Driver circuit for an open or high resistance. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE DRIVER BLEND DOOR ACTUATOR Replace the Driver Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . Using the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CB-2B-MAIN/LEFT TEMPERATURE DOOR CONTROL - WIRES SHORTED TOGETHER

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

The A/C Heater Control detects the control wiring shorted together in the Driver Blend Door control circuit. If the A/C Heater Control detects a valid current draw, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
(C61) DRIVER BLEND DOOR DRIVER CIRCUIT SHORTED TO THE (C34) COMMON DOOR DRIVER CIRCUIT
DRIVER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 40

Scheme 40: DIAGNOSTIC TEST

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 3 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 3 . No Go To 5 .
CHECK FOR A SHORT BETWEEN THE (C61) DRIVER BLEND DOOR DRIVER CIRCUIT AND THE (C34) COMMON DOOR DRIVER CIRCUIT Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Driver Blend Door Actuator harness connector. Measure the resistance between the (C61) Driver Blend Door Driver circuit and the (C34) Common Door Driver circuit. Is the resistance below 100k Ohms? Yes Repair the short between (C61) Driver Blend Door Driver circuit and the (C34) Common Door Driver circuit. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE DRIVER BLEND DOOR ACTUATOR Replace the Driver Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CB-92-MAIN/LEFT TEMPERATURE DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously with the ignition on.

If the A/C Heater Control detects a overheat condition of the Integrated Circuit (IC) that controls the Driver Blend Door Driver circuit. If the A/C Heater Control detects a valid temperature the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Allow the A/C Heater Control to cool down for five minutes then go to 2 . No Go To 2 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CC-00-MAIN/LEFT TEMPERATURE DOOR TRAVEL TOO SMALL

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

Possible Causes
RELATED DTCS PRESENT
DRIVER BLEND DOOR BINDING
DRIVER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. With the scan tool, read HVAC DTCs. Are there any Door Control Circuit Open, Performance, or Short to Ground, Voltage, or Together DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test? Yes Go To 4 . No Go To 6 .
CHECK THE DRIVER BLEND DOOR Remove the Driver Blend Door Actuator and check the Driver Blend Door for binding and full travel. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . Were there any problems found? Yes Repair or replace the Driver Blend Door as necessary in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE DRIVER BLEND DOOR ACTUATOR Replace the Driver Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs. With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC reset during HVAC Actuator Calibration Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11CD-00-MAIN/LEFT TEMPERATURE DOOR TRAVEL TOO LARGE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

When ever an Actuator Calibration Test is performed.

The A/C Heater Control uses a pulse feedback to the controller to detect the total door movement range. If the amount of pulses required to move the door completely in both directions is greater than what the controller has stored in its memory, this DTC will set. If an Actuator Calibration Test is performed or during normal operation and the A/C Heater Control detects a valid range of the door movement span in both directions, the DTC will change from Active to Stored and will stay in the controllers memory for 100 ignition cycles.

Possible Causes
RELATED DTCS PRESENT
DRIVER BLEND DOOR STOPS
DRIVER BLEND DOOR
DRIVER BLEND DOOR ACTUATOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR RELATED DTCS Ignition on, engine not running. With the scan tool, read HVAC DTCs. Are there any Door Control Circuit Open, Performance, or Short to Ground, Voltage, or Together DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 3 .
PERFORM HVAC ACTUATOR CALIBRATION TEST With the scan tool, perform the HVAC Actuator Calibration Test. Did this DTC change from Stored to Active while performing the HVAC System Test? Yes Go To 4 . No Go To 6 .
CHECK THE DRIVER BLEND DOOR Remove the Driver Blend Door Actuator and check the Driver Blend Door stops, linkage (stripped or cracked) and door. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . Were there any problems found? Yes Repair or replace the Driver Blend Door as necessary in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE DRIVER BLEND DOOR ACTUATOR Replace the Driver Blend Door Actuator in accordance with the Service Information. Refer to «ACTUATOR, BLEND DOOR , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information__removal) . With the scan tool, erase HVAC DTCs and perform the «ACTUATOR CALIBRATION FUNCTION»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__actuator-calibration-function) . Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11D3-00-A/C COOLDOWN TEST PERFORMANCE - COMPRESSOR NOT ENGAGED

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Whenever a Cooldown Test is performed.

The A/C Heater Control receives a BUS message from the Powertrain Control Module (PCM) that the compressor is not engaged when it is requested.

Possible Causes
LOSS OF COMMUNICATION WITH THE PCM OR MULTIPLE BUS PROBLEMS
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR ACTIVE BUS COMMUNICATION DTCS NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Ignition on, engine not running. Using the scan tool, read DTCs. Are there any Active BUS Communication DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK FOR STORED BUS COMMUNICATION DTCS Ignition on, engine not running. Using the scan tool, read DTCs. Are there any inactive or stored BUS Communication DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the Stored Lost Communication DTCs diagnostic procedure. No Go To 3 .
CHECK FOR PCM A/C COMPRESSOR DTCS Ignition on, engine not running. Using the scan tool, read PCM DTCs. Are there any PCM A/C Compressor DTCs present? Yes Refer to «DIAGNOSTIC CODE INDEX - 3.0L DIESEL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-diagnostic-code-index) or «DIAGNOSTIC CODE INDEX - NGC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#36l-57l-diagnostic-code-index) and perform the appropriate diagnostic procedure . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK FOR TOTALLY INTEGRATED POWER MODULE DTCS Using the scan tool, read TIPM DTCs. Are there any TIPM DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the appropriate diagnostic procedure. No Go To 5 .
CHECK THE A/C COMPRESSOR Ignition on, engine running. Using the A/C heater Control, request A/C maximum cool. Does the A/C Compressor Clutch engage? Yes Go To 6 . No Refer to «COMPRESSOR, A/C , DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) .
CHECK IF THE DTC RESETS Turn the ignition off to the lock position. Ignition on, engine not running. Using the scan tool, erase HVAC DTCs. Turn the ignition off to the lock position. Ignition on, engine not running. Using the scan tool, perform the A/C Cooldown Test. Follow the instructions on the scan tool. Using the scan tool, read HVAC DTCs. Does this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 7 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11D5-00-A/C COOLDOWN TEST PERFORMANCE - EVAP TEMP SENSOR ERROR

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Whenever a Cooldown Test is performed.

The A/C Heater Control detects a circuit malfunction with the Evaporator Temperature Sensor during a Cooldown Test.

Possible Causes
EVAPORATOR TEMPERATURE SENSOR DTC PRESENT
EVAPORATOR TEMPERATURE SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK IF DTC IS ACTIVE Ignition on, engine not running. Using the scan tool, perform an A/C Cooldown Test. Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 4 .
PERFORM HVAC ACTUATOR CALIBRATION TEST Using the scan tool, perform the HVAC Actuator Calibration Test. Did any other HVAC DTCs set while performing the Actuator Calibration Test? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure. No Go To 3 .
CHECK THE EVAPORATOR TEMPERATURE SENSOR Replace the Evaporator Temperature Sensor in Accordance with the Service Information. Refer to «SENSOR, EVAPORATOR TEMPERATURE , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Using the scan tool, erase HVAC DTCs. Cycle the ignition off for 30 seconds then back on. Using the scan tool, perform an A/C Cooldown Test. With the scan tool, read HVAC DTCs. Does this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B10D6-92-LEFT SEAT VENTILATION SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Left Seat Ventilation Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Left Seat Ventilation Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Left Seat Ventilation Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B10D7-92-RIGHT SEAT VENTILATION SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Right Seat Ventilation Switch is stuck in an On position for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Right Seat Ventilation Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Right Seat Ventilation Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B11D9-92-BLOWER SPEED KNOB REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to the Wiring Information .

With the ignition on.

If the Blower Motor Control has a mechanical or electrical failure for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK THE A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on. Slowly Turn the Blower Speed Control knob from Low to High multiple times for a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11DA-96-ITOS CABIN TEMPERATURE SENSOR - COMPONENT INTERNAL FAILURE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The HVAC A/C Heater Control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Control to assure that they are in a calibrated range and are functioning properly. The Integrated Thermal Optical Sensor (ITOS) in mounted in the front of the A/C Heater Control and is a non-serviceable component.

With the ignition on.

The A/C Heater Control detects a malfunction in the Integrated Thermal Optical Sensor (ITOS).

Possible Causes
DEBRIS INHIBITING THE FUNCTIONALITY OF THE INTEGRATED THERMAL OPTICAL SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

REPLACE THE A/C HEATER CONTROL This DTC detects a problem with the ITOS which is an internal sensor circuit in the controller and is not serviceable. Repair Inspect the A/C Heater Control for debris that my be inhibiting the functionality of the Integrated Thermal Optical Sensor and clean as necessary. If no problem is found, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B11DB-92-MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Mode Switch Control has a mechanical or electrical failure for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
OBJECT HOLDING SWITCH IN AN ON POSITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

INSPECT FOR OBJECT HOLDING SWITCH IN AN ON POSITION Inspect the A/C Heater Control for an object or debris holding the Mode Switch in an On position. NOTE: Using the scan tool you can read the On/Off status of the control switch. Is the Mode Switch being held in or stuck On? Yes The A/C Heater control cannot be repaired or adjusted and must be replaced if inoperative or damaged but it might be cleanable if external debris is inhibiting the proper operation of the control switch or knob. If you are unable to clean the control to where it can function properly, replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on and wait a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Does the scan tool display this DTC as Active or is the status of the switch reading On? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B11E9-92-LEFT TEMPERATURE KNOB REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Left Temperature Control has a mechanical or electrical failure for more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on. Slowly Turn the Left Temperature Control from full cold to full hot several times for a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B11EA-92-RIGHT TEMPERATURE KNOB REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the Right Temperature Control has a mechanical or electrical failure more than 30 seconds. This DTC has a de-maturing time of one second. If the DTCs status changes from active to stored, the DTC will stay in memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK THE A/C HEATER CONTROL Turn the ignition on. Using the scan tool, erase HVAC DTCs. Turn the ignition off for 10 seconds, and then turn the ignition on. Slowly Turn the Right Temperature Control from full cold to full hot multiple times for a minimum of 30 seconds. Using the scan tool, read HVAC DTCs. Did this DTC reset? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 2 .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1600-11-LEFT SOLAR SENSOR - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to the Wiring Information .

The HVAC A/C Heater Control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Control to assure that they are in range. If those sensors fall out of predetermined ranges a Diagnostic Trouble Code (DTC) will set. For further information Refer to SENSOR, SUN , OPERATION .

Continuously with the ignition on.

If the A/C Heater Control detects a short to ground on Sun Sensor Signal 1 circuit.

Possible Causes
(G39) SUN SENSOR 1 SIGNAL CIRCUIT SHORTED TO GROUND
SUN SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 41

Scheme 41: DIAGNOSTIC TEST

CHECK IF THE DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 4 .
CHECK (G39) SUN SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between ground and the (G39) Sun Sensor Signal 1 circuit. Is the resistance below 100k Ohms? Yes Repair the (G39) Sun Sensor 1 Signal circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE SUN SENSOR AND A/C HEATER CONTROL Replace the Sun Sensor in accordance with the Service Information. Refer to «SENSOR, SUN , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did this DTC reset while performing the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1600-12-LEFT SOLAR SENSOR - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to the appropriate System Wiring Information .

The HVAC A/C Heater Control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Control to assure that they are in range. If those sensors fall out of predetermined ranges a Diagnostic Trouble Code (DTC) will set. For further information, refer to SENSOR, SUN , OPERATION .

With the ignition on.

If the A/C Heater Control detects a short to voltage on Sun Sensor Signal 1 circuit.

Possible Causes
(G39) SUN SENSOR SIGNAL 1 CIRCUIT SHORTED TO VOLTAGE
(G39) SUN SENSOR SIGNAL 1 CIRCUIT OPEN
(C939) SUN SENSOR RETURN CIRCUIT OPEN
SUN SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 42

Scheme 42: DIAGNOSTIC TEST

Scheme 43

Scheme 44

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 6 .
CHECK THE (G39) SUN SENSOR SIGNAL 1 CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the Sun Sensor harness connector. Disconnect the A/C Heater Control harness connector. NOTE: Check connectors - Clean/repair as necessary. Ignition on, engine not running. Check the voltage of the (G39) Sun Sensor Signal 1 circuit. Is there any voltage present? Yes Repair the (G39) Sun Sensor Signal 1 circuit for an short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE (G39) SUN SENSOR SIGNAL 1 CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Measure the resistance of the (G39) Sun Sensor Signal 1 circuit between the A/C Heater Control harness connector and the Sun Sensor harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (G39) Sun Sensor Signal 1 circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (C939) SUN SENSOR RETURN CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sun Sensor Return circuit between the A/C Heater Control C1 harness connector and the Sun Sensor harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (C939) Sun Sensor Return circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE SUN SENSOR AND A/C HEATER CONTROL Turn the ignition off to the lock position. Replace the Sun Sensor in accordance with the Service Information. Refer to «SENSOR, SUN , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did the DTC reset during or after the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1603-11-RIGHT SOLAR SENSOR - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to the Wiring Information .

The HVAC A/C Heater Control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Control to assure that they are in range. If those sensors fall out of predetermined ranges a Diagnostic Trouble Code (DTC) will set. For further information, refer to SENSOR, SUN , OPERATION .

With the ignition on.

If the A/C Heater Control detects a short to ground on Sun Sensor Signal 2 circuit.

Possible Causes
(G139) SUN SENSOR SIGNAL 2 CIRCUIT SHORTED TO GROUND
SUN SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 45

Scheme 45: DIAGNOSTIC TEST

CHECK IF THE DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 4 .
CHECK (G139) SUN SENSOR SIGNAL 2 CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Sun Sensor harness connector. Measure the resistance between ground and the (G139) Sun Sensor Signal 2 circuit. Is the resistance below 100k Ohms? Yes Repair the (G139) Sun Sensor Signal 2 circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE SUN SENSOR AND A/C HEATER CONTROL Replace the Sun Sensor in accordance with the Service Information. Refer to «SENSOR, SUN , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did this DTC reset while performing the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B1603-12-RIGHT SOLAR SENSOR - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to the appropriate System Wiring Information .

The HVAC A/C Heater Control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Control to assure that they are in range. If those sensors fall out of predetermined ranges a Diagnostic Trouble Code (DTC) will set. For further information, refer to SENSOR, SUN , OPERATION .

With the ignition on.

If the A/C Heater Control detects a short to voltage on Sun Sensor Signal 2 circuit.

Possible Causes
(G139) SUN SENSOR SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE
(G139) SUN SENSOR SIGNAL 2 CIRCUIT OPEN
(G939) SUN SENSOR RETURN CIRCUIT OPEN
SUN SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 46

Scheme 46: DIAGNOSTIC TEST

Scheme 47

CHECK IF DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 6 .
CHECK THE (G139) SUN SENSOR 2 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off to the lock position. Disconnect the Sun Sensor harness connector. Disconnect the A/C Heater Control harness connector. NOTE: Check connectors - Clean/repair as necessary. Ignition on, engine not running. Check the voltage of the (G139) Sun Sensor 2 Signal circuit. Is there any voltage present? Yes Repair the (G139) Sun Sensor 2 Signal circuit for an short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE (G139) SUN SENSOR 2 SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Measure the resistance of the (G139) Sun Sensor 2 Signal circuit between the A/C Heater Control harness connector and the Sun Sensor harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (G139) Sun Sensor 2 Signal circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 4 .
CHECK THE (G939) SUN SENSOR RETURN CIRCUIT FOR AN OPEN Measure the resistance of the (G939) Sun Sensor Return circuit between the A/C Heater Control C1 harness connector and the Sun Sensor harness connector. Is the resistance above 5.0 Ohms? Yes Repair the (G939) Sun Sensor Return circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE SUN SENSOR AND A/C HEATER CONTROL Turn the ignition off to the lock position. Replace the Sun Sensor in accordance with the Service Information. Refer to «SENSOR, SUN , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did the DTC reset during or after the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B160F-11-TWILIGHT/AMBIENT LIGHT SENSOR INPUT - CIRCUIT SHORT TO GROUND

For a complete wiring diagram, refer to the appropriate System Wiring Information .

The HVAC A/C Heater Control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Control to assure that they are in range. If those sensors fall out of predetermined ranges a Diagnostic Trouble Code (DTC) will set. For further information, refer to SENSOR, SUN , OPERATION .

With the ignition on.

If the Twilight or Ambient Light Sensor input voltage is less than 1.05 volts for period of 1.2 seconds.

Possible Causes
(L24) AUTO HEADLAMPS SIGNAL CIRCUIT SHORTED TO GROUND
SUN SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 48

Scheme 48: DIAGNOSTIC TEST

CHECK IF THE DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 4 .
CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Sun Sensor harness connector. Measure the resistance between ground and the (L24) Auto Headlamps Signal circuit. Is the resistance below 100k Ohms? Yes Repair the (L24) Auto Headlamps Signal circuit for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE SUN SENSOR AND A/C HEATER CONTROL Replace the Sun Sensor in accordance with the Service Information. Refer to «SENSOR, SUN , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did this DTC reset while performing the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B160F-12-TWILIGHT/AMBIENT LIGHT SENSOR INPUT - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to the appropriate System Wiring Information .

The HVAC A/C Heater Control uses a variety of sensors to adjust HVAC operation to obtain optimal performance. These sensors are continuously monitored by the A/C Heater Control to assure that they are in range. If those sensors fall out of predetermined ranges a Diagnostic Trouble Code (DTC) will set. For further information, refer to SENSOR, SUN , OPERATION .

With the ignition on.

If the Twilight or Ambient Light Sensor input voltage is greater than 4.83 volts for period of 1.2 seconds.

Possible Causes
(L24) AUTO HEADLAMPS SIGNAL CIRCUIT SHORTED TO VOLTAGE
(L24) AUTO HEADLAMPS SIGNAL CIRCUIT OPEN
(G939) SUN SENSOR RETURN CIRCUIT OPEN
SUN SENSOR
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 49

Scheme 49: DIAGNOSTIC TEST

Scheme 50

CHECK IF THE DTC IS ACTIVE Ignition on, engine not running. With the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 2 . No Go To 6 .
CHECK THE (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Ignition on, engine not running. Measure the voltage of the (L24) Auto Headlamps Signal circuit. Is there any voltage present? Yes Repair the (L24) Auto Headlamps Signal circuit for a short to voltage. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 3 .
CHECK THE (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the Sun Sensor harness connector. Measure the resistance of the (L24) Auto Headlamps Signal circuit between the A/C Heater Control C1 harness connector and the Sun Sensor harness connector. Is the resistance below 5.0 Ohms? Yes Go To 4 . No Repair the (L24) Auto Headlamps Signal circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE (G939) SUN SENSOR RETURN CIRCUIT FOR AN OPEN Measure the resistance of the (G939) Sun Sensor Return circuit between the A/C Heater Control C1 harness connector and the Sun Sensor harness connector. Is the resistance below 5.0 Ohms? Yes Go To 5 . No Repair the (G939) Sun Sensor Return circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE SUN SENSOR AND A/C HEATER CONTROL Replace the Sun Sensor in accordance with the Service Information. Refer to «SENSOR, SUN , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . Did this DTC reset while performing the HVAC Verification Test? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B210A-84-SYSTEM VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE

For a complete wiring diagram, refer to the appropriate System Wiring Information .

The A/C Heater Control constantly monitors battery and ignition voltage as well as battery voltage derived from BUS communication to ensure proper operation. If the voltage to the controller is out of range, it could cause damage to the controller or its respective components. If the voltage of either circuit drops below or rises above a predetermined calibration a Diagnostic Trouble Code (DTC) will set.

Continuously with the ignition on.

If the controller system voltage or ignition voltage broadcast over the BUS is lower than monitored controller voltage the for period of 60 seconds.

Possible Causes
RELATED TIPM DTCS PRESENT
RELATED CHARGING SYSTEM DTCS PRESENT
RELATED HVAC DTCS PRESENT
OTHER CONTROLLERS REPORTING UNDER VOLTAGE CONDITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR TIPM DTCS Ignition on, engine not running. With the scan tool, read DTCs. Are there any Totally Integrated Power Module (TIPM) DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK FOR POWERTRAIN CONTROL MODULE DTCS With the scan tool, read DTCs. Are there any Powertrain Control Module (PCM) charging system DTCs present? Yes Refer to «DIAGNOSTIC CODE INDEX - 3.0L DIESEL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-diagnostic-code-index) or «DIAGNOSTIC CODE INDEX - NGC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#36l-57l-diagnostic-code-index) and perform the appropriate diagnostic procedure . No Go To 3 .
CHECK FOR HVAC DTCS With the scan tool, read HVAC DTCs. Is the DTC B210D-84-Battery Voltage Low - Signal Below Allowable Range present also? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the diagnostic procedure for DTC B210D-84-Battery Voltage Low - Signal Below Allowable Range. No Go To 4 .
CHECK IF THE DTC IS ACTIVE With the scan tool, read HVAC DTCs. NOTE: It can take up to 60 seconds or more for this DTC to mature. Is this DTC active? Yes Go To 5 . No Go To 6 .
CHECK IF OTHER CONTROLLERS ARE REPORTING AN OVER VOLTAGE CONDITION With the scan tool, read DTCs. Are any other controllers reporting an over voltage condition? Yes Go to DTC Based Diagnostics and perform the appropriate diagnostic procedure. No Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B210B-85-SYSTEM VOLTAGE HIGH - SIGNAL ABOVE ALLOWABLE RANGE

For a complete wiring diagram, refer to the appropriate System Wiring Information .

Continuously with the ignition on.

If the controller system voltage or ignition voltage broadcast over the BUS is higher than monitored controller voltage the for period of 60 seconds.

Possible Causes
RELATED TIPM DTCS PRESENT
RELATED CHARGING SYSTEM DTCS PRESENT
RELATED HVAC DTCS PRESENT
OTHER CONTROLLERS REPORTING OVER VOLTAGE CONDITION
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR TIPM DTCS Ignition on, engine not running. With the scan tool, read DTCs. Are there any Totally Integrated Power Module (TIPM) DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the appropriate diagnostic procedure. No Go To 2 .
CHECK FOR POWERTRAIN CONTROL MODULE DTCS With the scan tool, read DTCs. Are there any Powertrain Control Module (PCM) charging system DTCs present? Yes Refer to «DIAGNOSTIC CODE INDEX - 3.0L DIESEL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-diagnostic-code-index) or «DIAGNOSTIC CODE INDEX - NGC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#36l-57l-diagnostic-code-index) and perform the appropriate diagnostic procedure . No Go To 3 .
CHECK FOR HVAC DTCS With the scan tool, read HVAC DTCs. Is the DTC B210E-85-Battery Voltage High - Signal Above Allowable Range present also? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the diagnostic procedure for B210E-85-Battery Voltage High - Signal Above Allowable Range. No Go To 4 .
CHECK IF THE DTC IS ACTIVE With the scan tool, read HVAC DTCs. NOTE: It can take up to 60 seconds or more for this DTC to mature. Is this DTC active? Yes Go To 5 . No Go To 6 .
CHECK IF OTHER CONTROLLERS ARE REPORTING AN OVER VOLTAGE CONDITION With the scan tool, read DTCs. Are any other controllers reporting an over voltage condition? Yes Go to DTC Based Diagnostics and perform the appropriate diagnostic procedure. No Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

Scheme 51

Scheme 51: B210D-84-BATTERY VOLTAGE LOW - SIGNAL BELOW ALLOWABLE RANGE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

With the ignition on.

If the controller battery voltage is less than or equal to 10.0 volts for period of five seconds.

Possible Causes
RELATED CHARGING SYSTEM DTCS PRESENT
(F921) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
(A417) FUSED B(+) CIRCUIT OPEN
(Z912) GROUND CIRCUIT OPEN
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Scheme 52

Scheme 52: DIAGNOSTIC TEST

Scheme 53

Scheme 54

CHECK FOR CHARGING SYSTEM DTCS Using the scan tool, read PCM DTCs. Are there any charging system DTCs present in the Powertrain Control Module (PCM)? Yes Refer to «DIAGNOSTIC CODE INDEX - 3.0L DIESEL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-diagnostic-code-index) or «DIAGNOSTIC CODE INDEX - NGC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#36l-57l-diagnostic-code-index) and perform the appropriate diagnostic procedure . No Go To 2 .
CHECK FOR TOTALLY INTEGRATED POWER MODULE DTCS Using the scan tool, read TIPM DTCs. Are there any TIPM DTCS present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the appropriate diagnostic procedure. No Go To 3 .
CHECK IF THE DTC IS ACTIVE Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 7 .
CHECK THE (F921) FUSED IGNITION SWITCH OUTPUT CIRCUIT FOR AN OPEN Ignition on, engine not running. While back probing, measure the voltage of the (F921) Fused Ignition Switch Output circuit in the A/C Heater Control C1 harness connector. Is the voltage 10.0 volts or below? Yes Repair the (F921) Fused Ignition Switch Output circuit for an open or high resistance. NOTE: If the fuse is open, make sure to check for a short to ground on the (F921) Fused Ignition Switch Output circuit. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 5 .
CHECK THE (A417) FUSED B(+) CIRCUIT FOR AN OPEN Ignition on, engine not running. While back probing, measure the voltage of the (A417) Fused B (+) circuit in the A/C Heater Control C1 harness connector. Is the voltage 10.0 volts or below? Yes Repair the (A417) Fused B (+) circuit for an open or high resistance. NOTE: Make sure to check if the IOD fuse is installed. If the fuse is open, make sure to check for a short to ground. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Go To 6 .
CHECK THE (Z912) GROUND CIRCUIT FOR AN OPEN Turn the ignition off to the lock position. Disconnect the A/C Heater Control C1 harness connector. Using a 12-volt test light connected to 12-volts, check the (Z912) Ground circuit. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Repair the (Z912) Ground circuit for an open. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B210E-85-BATTERY VOLTAGE HIGH - SIGNAL ABOVE ALLOWABLE RANGE

For a complete wiring diagram, refer to the appropriate System Wiring Information .

With the ignition on.

If the controller battery voltage is higher than 16.0 volts for period of one second.

Possible Causes
RELATED CHARGING SYSTEM DTCS PRESENT
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK FOR CHARGING SYSTEM DTCS Using the scan tool, read PCM DTCs. Are there any charging system DTCs present in the Powertrain Control Module (PCM)? Yes Refer to «DIAGNOSTIC CODE INDEX - 3.0L DIESEL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-diagnostic-code-index) or «DIAGNOSTIC CODE INDEX - NGC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#36l-57l-diagnostic-code-index) and perform the appropriate diagnostic procedure . No Go To 2 .
CHECK FOR TOTALLY INTEGRATED POWER MODULE DTCS Using the scan tool, read TIPM DTCs. Are there any TIPM DTCs present? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the appropriate diagnostic procedure. No Go To 3 .
CHECK IF THE DTC IS ACTIVE Using the scan tool, read HVAC DTCs. Is this DTC active? Yes Go To 4 . No Go To 5 .
CHECK IF OTHER CONTROLLER ARE REPORTING AN OVER VOLTAGE CONDITION Ignition on, engine not running. With the scan tool read DTCs. Are any other controllers reporting an over voltage condition? Yes Go to DTC Based Diagnostics and perform the appropriate diagnostic procedure. No Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .
CHECK THE WIRING AND CONNECTORS The conditions necessary to set the DTC are not present at this time. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Wiggle the wiring and connectors while checking for shorted and open circuits. Were there any problems found? Yes Repair as necessary. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . No Test complete.

B2214-00-(HVAC) CLIMATE CONTROL INTERNAL

For a complete wiring diagram, refer to the appropriate System Wiring Information .

With the ignition on.

If the A/C Heater Control has an internal fault. This Diagnostic Trouble Code (DTC) has a maturing time of five seconds and a de-maturing time of 10 seconds. If the DTCs status changes from active to stored it will stay in memory for 100 ignition cycles.

Possible Causes
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK THE A/C HEATER CONTROL Repair Check for any controller software updates if applicable. If an update is available, reprogram the controller with the latest software. If no software updates are available, replace and program the A/C Heater Control in accordance with the Service Information. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

B222A-00-VEHICLE LINE MISMATCH

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The A/C Heater Controller checks for vehicle configuration using communication over the BUS. If the stored configuration does not match the configuration stored in the controller this DTC will set.

With the ignition on.

If the stored configuration does not match the configuration stored in the controller.

Possible Causes
VEHICLE CONFIGURATION NOT STORED IN THE TOTALLY INTEGRATED POWER MODULE (TIPM)
CONTROL MODULE INSTALLED IN INCORRECT VEHICLE
A/C HEATER CONTROL

Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

CHECK THE VEHICLE CONFIGURATION NOTE: The DTC must be active and no BUS communication DTCs present before performing this test. If BUS communication DTCs are present, perform there respective test first. If the DTC is stored, erase the DTC and cycle the ignition. If the DTC resets and changes to active, then proceed. With the scan tool, check the vehicle configuration stored in the Totally Integrated Power Module (TIPM). With the scan tool, check the vehicle configuration stored in the A/C Heater Control (HVAC). Pick the answer that best describes your findings: TIPM has wrong or no vehicle configuration With the scan tool, program the proper vehicle configuration in the TIPM. Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . HVAC has wrong vehicle configuration but TIPM has correct configuration. Replace and program the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) . HVAC and TIPM have proper calibration and the DTC is active in the HVAC. Check if other modules such as the Powertrain Control Module (PCM) have the wrong configuration stored in the controller and reprogram or replace as necessary. If all other modules show the proper configuration, replace the A/C Heater Control in accordance with the Service Information. Refer to «CONTROL, A/C AND HEATER , REMOVAL»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

U0010-00-CAN INTERIOR BUS

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

The controller detects a short to ground on the CAN Interior Bus (125K) (+) circuit or a short to voltage on the CAN Interior Bus (125K) (-) circuit.

Possible Causes
(D265) CAN INTERIOR BUS(+) (125k) CIRCUIT SHORTED TO VOLTAGE
(D264) CAN INTERIOR BUS(-) (125k) CIRCUIT SHORTED TO GROUND
(D264) CAN INTERIOR BUS(-) (125k) CIRCUIT SHORTED TO THE (D265) CAN INTERIOR BUS(+) (125k) CIRCUIT
TOTALLY INTEGRATED POWER MODULE (TIPM)
ANY CAN INTERIOR BUS MODULE

VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. Using the scan tool, read active DTCs. Is this DTC active? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the U0010-CAN Interior Bus diagnostic procedure. No Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the Stored Lost Communication DTCs diagnostic procedure.

U0141-00-LOST COMMUNICATION WITH IPM (FCM/TIPM)

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Integrated Power Module (TIPM) for approximately two to five seconds.

Possible Causes
(D65) CAN C BUS(+) CIRCUIT SHORTED TO VOLTAGE
(D64) CAN C BUS(-) CIRCUIT SHORTED TO GROUND
TOTALLY INTEGRATED POWER MODULE (TIPM) POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
TOTALLY INTEGRATED POWER MODULE (TIPM)
MODULE THAT SET THIS DTC

VERIFY THE DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is the DTC active at this time? Yes Perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure. Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) . . No Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) . .

U0155-00-LOST COMMUNICATION WITH CLUSTER/CCN

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fuse installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Instrument Cluster (CCN) for approximately two to five seconds.

Possible Causes
(D265) CAN INTERIOR BUS(+) (125k) CIRCUIT SHORTED TO VOLTAGE
(D264) CAN INTERIOR BUS(-) (125k) CIRCUIT SHORTED TO GROUND
INSTRUMENT CLUSTER POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
INSTRUMENT CLUSTER (CCN)
MODULE THAT SET THIS DTC

VERIFY DTC IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read active DTCs. Is this DTC active? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the U0155-Lost Communication with Cluster/CCN diagnostic procedure. No Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the Stored Lost Communication DTCs diagnostic procedure.

U0208-LOST COMMUNICATION WITH HEATED SEAT CONTROL MODULE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Continuously when the ignition is on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fused installed.

Totally Integrated Power Module (TIPM) is configured correctly.

Bus messages not received from the Heated Seat Module for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
HEATED SEAT MODULE POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
HEATED SEAT MODULE
MODULE THAT SET THIS DTC

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding. Turn the ignition on. With the scan tool, read the active DTCs. Is this DTC active? Yes Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) and perform the U0208-Lost Communication with Heated Seat Control Module diagnostic procedure. No Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the Stored Lost Communication DTCs diagnostic procedure.

HVAC VERIFICATION TEST

Perform the following procedures to verify that the repair(s) are valid.

Make sure that all accessories are turned off.
Make sure that the battery is fully charged.
Turn the ignition off to the lock position.
Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
With the scan tool, record and erase all Diagnostic Trouble Codes (DTCs) from ALL modules.
Turn the ignition off, remove the scan tool from the DLC (Data Link Connector). Open the door and close the door. Wait a minimum 30 seconds, then turn the ignition on. Reconnect the scan tool. NOTE: Disconnecting the scan tool and opening and closing the door will allow the controller to enter into sleep mode.
With the scan tool perform the HVAC Actuator Calibration Test.
Start and run the engine for two minutes while operating all functions of the system that caused the original concern.
With the scan tool, check for DTCs in all modules.

Is the original condition still present or are there any other HVAC DTCs present?

Yes

Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure.

Repair is complete.

HVAC SYSTEM TEST

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

The HVAC System Test provides a starting point in the diagnostic process by identifying the appropriate diagnostic procedure or system test to perform when diagnosing a given symptom, condition, or Diagnostic Trouble Code (DTC). It also provides a means for testing the entire HVAC system by utilizing the A/C Heater Control's On-Board System Tests. The HVAC System Tests can also assist in diagnosing stored DTCs.

HVAC SYSTEM TEST NOTE: Diagnose and repair all active DTCs before diagnosing and repairing stored DTCs. If active DTCs are present, see «DIAGNOSTIC CODE INDEX - 3.0L DIESEL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-diagnostic-code-index) or «DIAGNOSTIC CODE INDEX - NGC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#36l-57l-diagnostic-code-index) and perform the appropriate diagnostic procedure. Make a selection based on the symptom, condition, or DTC that you want to diagnose. scan tool Indicates HVAC Not Active On Bus Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#communication-non-dtc-based-diagnostics) and perform the No Response from HVAC diagnostic procedure. Blower Motor Inoperative Refer to «MOTOR, BLOWER , DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) for Blower Motor diagnostic procedures. Actuator Calibration Test Go To 4 . A/C System Performance (Cooldown) Test Go To 2 .
A/C COOLDOWN TEST The following are prerequisites of the A/C Cooldown Test. Verify that the: Refrigerant system has an adequate charge. Check and repair as necessary before proceeding in accordance with the Service Information. Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/ac-compressor/#heating-air-conditioning-service-information) . Blower motor operates correctly in all speeds. Diagnose and repair all blower related faults before proceeding. Work area ambient temperature is above 16° C (60° F) before proceeding. Move the vehicle to a warmer work area if necessary. Evaporator temperature is above 13° C (55° F) before proceeding. A/C compressor is not running. If the compressor is running, turn the A/C off and allow the evaporator to warm up before proceeding. NOTE: Running the AC Cooldown test will cause the A/C status indicator to flash. One or more status messages will display on the scan tool after running the Cooldown Test. These messages will clear after paging back out of this test function. Therefore, it is important to note all messages before doing so. Start the engine. Turn the Blower control to the high speed position. With the scan tool in HVAC, select System Tests and then select Cooldown test. Allow the test to run to completion. Does the scan tool display a status message that indicates a fault has occurred? Yes See «DIAGNOSTIC CODE INDEX»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__diagnostic-code-index) and perform the appropriate diagnostic procedure based on vehicle HVAC system. No Go To 3 .
MODE SWITCH AND DOOR ACTUATOR CIRCUIT TEST NOTE: If at anytime a DTC becomes active during this test, proceed to the conclusion question. If multiple DTCs are active, diagnose those that relate to a short circuit first. Start the engine and turn the Blower control to the low speed position. Set the Blend control (single-zone) or Driver and Passenger Blend control (dual-zone) to the full cold position. Monitor the scan tool for active HVAC DTCs while performing the following test steps. If equipped, press the A/C mode switch on, wait 30 seconds, and then press it off. On Dual-Zone systems, press the Recirculation mode switch on, wait 30 seconds, and then press it off. If equipped, press the EBL mode switch on, wait 30 seconds, and then press it off. Move the Blend control (single-zone) or Driver Blend control (dual-zone) from full cold to full hot, wait 30 seconds, and then move it back to full cold. If equipped, move the Passenger Blend control from full cold to full hot, wait 30 seconds, and then moved it back to full cold. Turn the Mode select control to the defrost position, wait 30 seconds, and then turn it to the panel position (dual-zone) or panel / recirculation position (single-zone). Wait 30 seconds before proceeding. Does the scan tool display any active DTCs? Yes See «DIAGNOSTIC CODE INDEX»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__diagnostic-code-index) and perform the appropriate diagnostic procedure based on vehicle HVAC system. No Go To 4 .
ACTUATOR CALIBRATION TEST Ignition on, engine not running. Using the scan tool, select Actuator Calibration Test. When the test is complete, read HVAC DTCs. Does the scan tool display any DTCs? Yes See «DIAGNOSTIC CODE INDEX»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__diagnostic-code-index) and perform the appropriate diagnostic procedure based on vehicle HVAC system. No Test Complete.

HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Perform the following steps prior to any diagnostic procedure(s).

Testing should only be performed with the battery fully charged to avoid false diagnosis.
With the scan tool, read Powertrain Control Module (PCM) Diagnostic Trouble Codes (DTCs). If PCM DTCs are present, and perform the appropriate diagnostic procedure(s) before proceeding. Refer to «DIAGNOSTIC CODE INDEX - 3.0L DIESEL»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#30l-diesel-diagnostic-code-index) or «DIAGNOSTIC CODE INDEX - NGC»(/jeep/grand-cherokee/wk2-2010-2013/remont/testing-diagnostics/#36l-57l-diagnostic-code-index) .
Depending on the vehicle configuration, with the scan tool, read Totally Integrated Power Module (TIPM) DTCs. If TIPM DTCs are present, and perform the appropriate diagnostic procedure(s) before proceeding. Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/communication-devices/#totally-integrated-power-module-tipm-dtcs-b10b4-to-b25ae) .
With the scan tool, read HVAC DTCs. Record all Stored, Active, and Pending DTC information.
With the scan tool, read the Environmental Data. Use this data to help identify the conditions in which the DTC was set.
Refer to the When Monitored and Set Conditions for this DTC. DTCs can set at ignition on, at start up, or operating under specific conditions.
Using the wiring diagram as a guide, inspect the wiring and connectors related to this circuit and clean/repair as necessary.
Check for controller software updates if applicable. Some conditions can be corrected by upgrading the controller software. NOTE: If the controller is updated with new software, with the scan tool, perform a HVAC Actuator Calibration Test.

Check for Service Information Tune-ups or Service Bulletins for any possible causes that may apply.

Did any of the above procedures repair the vehicle?

Yes

Testing is complete.
Perform the HVAC VERIFICATION TEST. Refer to «HVAC VERIFICATION TEST»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics__hvac-verification-test) .

Refer to «DIAGNOSIS AND TESTING»(/jeep/grand-cherokee/wk2-2010-2013/remont/automatic-hvac-system/#heating-air-conditioning-electrical-diagnostics) and perform the appropriate diagnostic procedure.

ON-BOARD DIAGNOSTICS

CAUTION

Do not exchange A/C Heater Controls from vehicle to vehicle. Software versions differ between models and model years. Installing an A/C Heater Control with software that is incompatible for a given vehicle can result in either improper or failed HVAC system operation.

Note. Always inspect the IOD fuse prior to diagnosing any heating-A/C system concerns. Make sure the fuse is functional and fully seated into the terminals of the totally integrated power module (TIPM) located in the engine compartment.

The A/C-heater control communicates on the controller area network (CAN) B bus and is fully addressable with a scan tool.

The A/C-heater controls primary means of fault detection is through active and stored diagnostic trouble codes (DTCs). Active DTCs are those which currently exist in the system. The condition causing the fault must be repaired in order to clear this type of DTC. Stored DTCs are those which occurred in the system since the A/C-heater control received the last clear diagnostic info message. All DTCs must be read with a scan tool (refer to DIAGNOSTIC CODE INDEX for the diagnostic test procedures).

The A/C-heater controls secondary means of fault detection is through system tests. These tests include the HVAC System Test, the A/C Cooldown Test, the Actuator Calibration Function, and for MTC Systems, the Actuator DTC Detection Test. Refer to SYSTEM TESTS for a detailed description of each test.

The HVAC System Test provides a starting point in the diagnostic process by identifying the appropriate system test to perform when diagnosing a given condition or DTC. It also provides a means for testing the entire HVAC system by utilizing the A/C-heater controls On-Board System Tests. The On-Board System Tests can also assist in diagnosing stored DTCs.

A/C COOLDOWN TEST

The A/C Cooldown Test

is actuated with a scan tool.
tests A/C system performance based on evaporator temperature sensor input.
will fail if evaporator starting temperature is below 18° C (65° F) when initiating the test.
will pass if the evaporator temperature drops 11° C (20° F).
indicates test outcome by displaying one or more test status messages on the scan tool. These messages will clear after paging back out of this test function. Therefore, is it important to note all of the messages before doing so.
will cause the A/C status indicator to flash while the test is running.

ACTUATOR CALIBRATION FUNCTION

The Actuator Calibration function

is actuated with a scan tool.
homes and repositions door actuators.
monitors for door span faults. Door span faults (XXX Door Travel Range Too Large or XXX Door Travel Range Too Small) will only display after calibration.
will cause the electric backlight (EBL) status indicator to flash while the test is running.

ACTUATOR DTC DETECTION TEST

The Actuator DTC Detection Test

is actuated with a scan tool.
supplements the continuous diagnostics on the actuator drive system.
monitors for shorted actuator circuits allowing service to easily diagnose and troubleshoot up to three simultaneous shorts. Shorted actuator circuit faults (XXX Control Circuit High or XXX Control Circuit Low) will only display after running the Actuator DTC Detection Test.

After repairing each DTC, cycle the ignition switch, and then rerun the Actuator DTC Detection test to ensure that no new DTCs exist. If multiple DTCs are present, beginning with the common circuits, diagnose and repair all short high faults and then short low faults. When the test returns passed, proceed with troubleshooting by clearing faults and running the Actuator Calibration function as a final check of proper system operation.

See also:
• CONTROL, A/C AND HEATER , DESCRIPTION
• DESCRIPTION
• ACTUATOR, BLEND DOOR , REMOVAL
• DIAGNOSIS AND TESTING
• DIAGNOSIS AND TESTING
• DIAGNOSTIC CODE INDEX - 3.0L DIESEL
• DIAGNOSTIC CODE INDEX - NGC
• B1000-92
• B1003-92
• B1006-92
• B1009-92
• B100C-92
• B100F-92
• B1012-92
• B1015-92
• B101E-92
• B1030-11
• B1030-12
• B1037-92
• B1058-12
• B1058-13
• B1058-2B
• B1058-92
• B105C-00
• B105D-00
• B1084-92
• B1087-92
• B10B2-00
• B10E8-12
• B1142-92
• B1184-92
• B1185-92
• B1186-92
• B1187-92
• B1188-92
• B11C2-11
• B11C2-12
• B11C2-13
• B11C2-2B
• B11C2-92
• B11C3-00
• B11C4-00
• B11C8-11
• B11C8-12
• B11C8-13
• B11C8-2B
• B11CB-92
• B11C9-00
• B11CA-00
• B11CB-11
• B11CB-12
• B11CB-13
• B11CB-2B
• B11CB-92
• B11CC-00
• B11CD-00
• B11D3-00
• B11D5-00
• B10D6-92
• B10D7-92
• B11D9-92
• B11DA-96
• B11DB-92
• B11E9-92
• B11EA-92
• B1600-11
• B1600-12
• B1603-11
• B1603-12
• B160F-11
• B160F-12
• B210A-84
• B210B-85
• B210E-85
• B2214-00
• B222A-00
• U0010-00
• U0141-00
• U0155-00
• U0208
• HVAC PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE
• HVAC VERIFICATION TEST
• ACTUATOR CALIBRATION FUNCTION
• DIAGNOSTIC CODE INDEX

Heating & Air Conditioning - Electrical Diagnostics Jeep Grand Cherokee WK2

DIAGNOSTIC CODE INDEX

B1000-92-A/C SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

THEORY OF OPERATION

WHEN MONITORED

SET CONDITION

POSSIBLE CAUSES

DIAGNOSTIC TEST

B1003-92-PANEL MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1006-92-BI-LEVEL MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1009-92-RECIRCULATION SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B100C-92-FLOOR MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B100F-92-MIX MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1012-92-DEFROST MODE SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1015-92-EBL / REAR DEFROST SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B101E-92-POWER ON/OFF SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

Scheme 1

Scheme 2

Scheme 3

B1030-12-EVAPORATOR TEMPERATURE SENSOR - CIRCUIT SHORT TO BATTERY

Scheme 4

Scheme 5

Scheme 6

B1037-92-AUTO SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

Scheme 7

Scheme 8

Scheme 9

B1058-12-RECIRCULATION DOOR CONTROL - CIRCUIT SHORT TO BATTERY

Scheme 10

Scheme 11

B1058-13-RECIRCULATION DOOR CONTROL - CIRCUIT OPEN

Scheme 12

Scheme 13

B1058-2B-RECIRCULATION DOOR CONTROL - WIRES SHORTED TOGETHER

Scheme 14

B1058-92-RECIRCULATION DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION

B105C-00-RECIRCULATION DOOR TRAVEL RANGE TOO SMALL

B105D-00-RECIRCULATION DOOR TRAVEL RANGE TOO LARGE

B1084-92-LEFT HEATED SEAT REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1087-92-RIGHT HEATED SEAT SWITCH INPUT - PERFORMANCE OR INCORRECT OPERATION

B10B2-00-A/C COOL DOWN TEST PERFORMANCE

Scheme 15

Scheme 16

Scheme 17

Scheme 18

B10E8-12-BLOWER MOTOR CONTROL - CIRCUIT SHORT TO BATTERY

Scheme 19

B1142-92-MODE UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1184-92-MAIN/LEFT TEMP UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1185-92-MAIN/LEFT TEMP DOWN SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1186-92-RIGHT TEMP UP SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1187-92-RIGHT TEMP DOWN SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B1188-92-HEATED STEERING WHEEL SWITCH REQUEST INPUT - PERFORMANCE OR INCORRECT OPERATION

B11C2-11-FRONT MODE DOOR 1 CONTROL - CIRCUIT SHORT TO GROUND

Scheme 20

Scheme 21

B11C2-12-FRONT MODE DOOR 1 CONTROL - CIRCUIT SHORT TO BATTERY

Scheme 22

Scheme 23

B11C2-13-FRONT MODE DOOR 1 CONTROL - CIRCUIT OPEN

Scheme 24

Scheme 25

B11C2-2B-FRONT MODE DOOR 1 CONTROL - WIRES SHORTED TOGETHER

Scheme 26

B11C2-92-FRONT MODE DOOR 1 CONTROL - PERFORMANCE OR INCORRECT OPERATION

B11C3-00-FRONT MODE DOOR 1 TRAVEL RANGE TOO SMALL

B11C4-00-FRONT MODE DOOR 1 TRAVEL RANGE TOO LARGE

B11C8-11-RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO GROUND

Scheme 27

Scheme 28

B11C8-12-RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT SHORT TO BATTERY

Scheme 29

Scheme 30

B11C8-13-RIGHT TEMPERATURE DOOR CONTROL - CIRCUIT OPEN

Scheme 31

Scheme 32

B11C8-2B-RIGHT TEMPERATURE DOOR CONTROL - WIRES SHORTED TOGETHER

Scheme 33

B11CB-92-RIGHT TEMPERATURE DOOR CONTROL - PERFORMANCE OR INCORRECT OPERATION

B11C9-00-RIGHT TEMPERATURE DOOR TRAVEL TOO SMALL