HVAC Systems - Electrical Diagnostics: Other Jeep Compass I

Monitor Conditions

1. When Monitored: With the ignition on.

Set Conditions

1. Set Condition: If the Instrument Cluster (CCN) detects voltage below 0.55 volts for 10 seconds on the (C105) HVAC MUX Control circuit.

Possible Causes

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1. VERIFY DTC B1001-A/C SWITCH REQUEST INPUT CIRCUIT LOW IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read DTCs. Does the scan tool display active: B1001-A/C SWITCH REQUEST INPUT CIRCUIT LOW? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK FOR B1001-A/C SWITCH REQUEST INPUT CIRCUIT LOW WITH A/C HEATER CONTROL C1 HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read DTCs. Does the scan tool display: B1001-A/C SWITCH REQUEST INPUT CIRCUIT LOW? Yes Go To 3 . No Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
3. CHECK THE (C105) HVAC MUX CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Instrument Cluster C4 harness connector. Measure the resistance of the (C105) HVAC MUX Control circuit between ground and the A/C Heater Control C4 harness connector. Does the ohm meter read open circuit? Yes Go To 4 . No Repair the (C105) HVAC MUX Control circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
4. CHECK THE (C105) HVAC MUX CONTROL CIRCUIT FOR A SHORT TO THE (Z936) GROUND CIRCUIT & THE (C955) HVAC MUX RETURN CIRCUIT Measure the resistance between the (C105) HVAC MUX Control circuit and the (Z936) Ground circuit in the A/C Heater Control C1 harness connector. Measure the resistance between the (C105) HVAC MUX Control circuit and the (C955) HVAC MUX Return circuit in the A/C Heater Control C1 and C4 harness connectors. Does the ohm meter read open circuit? Yes Replace the Instrument Cluster (CCN) in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Repair any circuits that are shorted to the (C105) HVAC MUX Control circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

Scheme 7

1. When Monitored: With the ignition on.

1. Set Condition: If the Instrument Cluster (CCN) detects voltage above 4.5 volts for 10 seconds on the (C105) HVAC MUX Control circuit.

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1. VERIFY DTC B1002-A/C SWITCH REQUEST INPUT CIRCUIT HIGH IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read DTCs. Does the scan tool display active: B1002-A/C SWITCH REQUEST INPUT CIRCUIT HIGH? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK THE (C105) HVAC MUX CONTROL CIRCUIT VOLTAGE AT A/C HEATER CONTROL C1 HARNESS CONNECTOR Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C105) HVAC MUX Control circuit. What is the voltage? Below 4.8 Volts Go To 3 . 4.8 to 5.2 Volts Go To 4 . Above 5.2 Volts Go To 6 .
3. CHECK THE (C105) HVAC MUX CONTROL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the Instrument Cluster (CCN) C4 harness connector. Measure the resistance of the (C105) HVAC MUX Control circuit between the A/C Heater Control C1 harness connector and the Instrument Cluster C4 harness connector. Does the ohm meter read open circuit? Yes Repair the (C105) HVAC MUX Control circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Instrument Cluster (CCN) in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
4. CHECK THE (C955) HVAC MUX RETURN CIRCUIT OPERATION Turn the ignition on. Using a volt meter, measure the voltage of the (C955) HVAC MUX Return circuit in the A/C Heater Control C1 harness connector. Does the volt meter read above 4.5 volts? Yes Replace the A/C-Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 5 .
5. CHECK THE (C955) HVAC MUX RETURN CIRCUIT FOR AN OPEN Measure the resistance of the (C955) HVAC MUX Return circuit between the A/C Heater Control C1 harness connector and the Instrument Cluster C4 harness connector. Does the ohm meter read open circuit? Yes Repair the (C955) HVAC MUX Return circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Instrument Cluster in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
6. CHECK THE (C105) HVAC MUX CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Instrument Cluster C4 harness connector. Turn the ignition on. Measure the voltage of the (C105) HVAC MUX Control circuit. Is the voltage above 1.0 volts? Yes Repair the (C105) HVAC MUX Control circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Instrument Cluster (CCN) in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the EBL mode switch stays in a pushed position for more than 10 minutes.

1. When Monitored: With the ignition on.

1. Set Condition: If the Evaporator Temperature Sensor input is out of range toward the low voltage threshold.

Note. This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored. Refer to HVAC System Test (ATC) for stored DTC test procedures.

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1. CHECK FOR DTC B1031-EVAPORATOR FIN TEMPERATURE SENSOR CIRCUIT LOW WITH EVAPORATOR TEMPERATURE SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Evaporator Temperature Sensor harness connector. Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read DTCs. Does the scan tool display: B1031-EVAPORATOR FIN TEMPERATURE SENSOR CIRCUIT LOW? Yes Go To 2 . No Replace the Evaporator Temperature Sensor in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Cluster (CCN) C3 harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between ground and the Cluster (CCN) C3 harness connector. Does the ohm meter read open circuit? Yes Go To 3 . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
3. CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO (C121) SENSOR GROUND CIRCUIT Disconnect the Cluster (CCN) C4 harness connector. Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit in the Cluster (CCN) C4 harness connector and the (C121) Sensor Ground circuit in the Cluster (CCN) C3 harness connector. Does the ohm meter read open circuit? Yes Replace the Cluster (CCN) in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to the (C121) Sensor Ground circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

Scheme 15

1. When Monitored: With the ignition on, the Cabin Heater Relay 1 commanded on.

1. Set Condition: If the Totally Integrated Power Module detects the (K132) Cabin Heater Relay 1 Control circuit is shorted to ground.

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1. VERIFY THAT THE DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 1 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10B4-CABIN HEATER 1 CONTROL CIRCUIT LOW? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK (K132) CABIN HEATER RELAY 1 OUTPUT CIRCUIT FOR SHORT TO GROUND Turn the ignition off. Disconnect the TIPM C1 harness connector. Remove the Cabin Heater Relay 1. Using an ohm meter measure the resistance between the (K132) Cabin Heater Relay 1 Output circuit and ground. Does the ohm meter read open circuit? Yes Go To 3 . No Repair the (K132) Cabin Heater Relay 1 Output circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
3. TOTALLY INTEGRATED POWER MODULE (TIPM) Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 1 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10B4-CABIN HEATER 1 CONTROL CIRCUIT LOW? Yes Replace the Totally Integrated Power Module (TIPM) in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Cabin Heater Relay 1 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on, the Cabin Heater Relay 1 is commanded on.

1. Set Condition: If the Totally Integrated Power Module detects a short to voltage on the (K132) Cabin Heater Relay 1 Control circuit.

Scheme 18

1. VERIFY THAT THE DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 1 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10B5-CABIN HEATER 1 CONTROL CIRCUIT HIGH? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK THE (K132) CABIN HEATER RELAY 1 CONTROL CIRCUIT FOR SHORT TO VOLTAGE Turn the ignition off. Disconnect the TIPM C1 harness connector. Remove the Cabin Heater Relay 1. Turn the ignition on. With a volt meter, measure the voltage on the (K132) Cabin Heater Relay 1 Control circuit. Does the volt meter read 1.0 volt or above? Yes Repair short to voltage on the (K132) Cabin Heater Relay 1 Control circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 3 .
3. TOTALLY INTEGRATED POWER MODULE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 1 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10B5-CABIN HEATER 1 CONTROL CIRCUIT HIGH? Yes Replace the Totally Integrated Power Module (TIPM in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Cabin Heater Relay 1 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

Scheme 19

1. When Monitored: With the ignition on, the Cabin Heater Relay 2 is commanded on.

1. Set Condition: If the Totally Integrated Power Module detects a short to voltage on the (K232) Cabin Heater Relay 2 Control circuit.

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1. VERIFY THAT THE DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 2 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool, display active: B10B9-CABIN HEATER 2 CONTROL CIRCUIT HIGH? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK THE (K232) CABIN HEATER RELAY 2 CONTROL CIRCUIT FOR SHORT TO VOLTAGE Turn the ignition off. Disconnect the TIPM C1 harness connector. Remove the Cabin Heater Relay 2. Turn the ignition on. With a volt meter, measure the voltage on the (K232) Cabin Heater Relay 2 Control circuit. Does the volt meter read 1.0 volt or above? Yes Repair short to voltage on the (K232) Cabin Heater Relay 2 Control circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 3 .
3. TOTALLY INTEGRATED POWER MODULE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 2 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10B9-CABIN HEATER 2 CONTROL CIRCUIT HIGH? Yes Replace the Totally Integrated Power Module (TIPM in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Cabin Heater Relay 2 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on, and the Cabin Heater Relay 1 commanded on.

1. Set Condition: If the Totally Integrated Power Module (TIPM) detects that the (K132) Cabin Heater Relay 1 Control circuit is open.

Scheme 22

1. VERIFY THAT THE DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater Relay 1. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10B6-CABIN HEATER 1 CONTROL CIRCUIT OPEN? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
2. CHECK (K132) CABIN HEATER RELAY 1 CONTROL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the TIPM C1 harness connector. Remove the Cabin Heater Relay 1. Using an ohm meter, measure the resistance of the (K132) Cabin Heater Relay 1 Control circuit between the TIPM C1 harness connector, and the Cabin Heater Relay 1 harness connector. Does the ohm meter read open circuit? Yes Repair the (K132) Cabin Heater Relay 1 Control circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 3 .
3. TOTALLY INTEGRATED POWER MODULE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater Relay 1. With the scan tool, read DTCs. Does the scan tool display active: B10B6-CABIN HEATER 1 CONTROL CIRCUIT OPEN? Yes Replace the Totally Integrated Power Module (TIPM) in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Cabin Heater Relay 1 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on, the Cabin Heater Relay 2 commanded on.

1. Set Condition: If the Totally Integrated Power Module detects the (K232) Cabin Heater Relay 2 Control circuit is shorted to ground.

Scheme 23

1. VERIFY THAT THE DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 2 Relay. Monitor the scan tool, for at least two minutes. With the scan tool, read DTCs. Does the scan tool, display active: B10B8-CABIN HEATER 2 CONTROL CIRCUIT LOW? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK (K232) CABIN HEATER RELAY 2 OUTPUT CIRCUIT FOR SHORT TO GROUND Turn the ignition off. Disconnect the TIPM C1 harness connector. Remove the Cabin Heater Relay 2. Using an ohm meter measure the resistance between the (K232) Cabin Heater Relay 2 Output circuit and ground. Does the ohm meter read open circuit? Yes Go To 3 . No Repair the (K232) Cabin Heater Relay 2 Output circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
3. TOTALLY INTEGRATED POWER MODULE (TIPM) Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater 2 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10B8-CABIN HEATER 2 CONTROL CIRCUIT LOW? Yes Replace the Totally Integrated Power Module (TIPM) in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Cabin Heater Relay 2 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on, and the Cabin Heater Relay 2 commanded on.

1. Set Condition: If the Totally Integrated Power Module (TIPM) detects that the (K232) Cabin Heater Relay 2 Control circuit is open.

Scheme 24

1. VERIFY THAT THE DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater Relay 2. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display active: B10BA-CABIN HEATER 2 CONTROL CIRCUIT OPEN? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
2. CHECK (K232) CABIN HEATER RELAY 2 CONTROL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the TIPM C1 harness connector. Remove the Cabin Heater Relay 2. Using an ohm meter, measure the resistance of the (K232) Cabin Heater Relay 2 Control circuit between the TIPM C1 harness connector, and the Cabin Heater Relay 2 harness connector. Does the ohm meter read open circuit? Yes Repair the (K232) Cabin Heater Relay 2 Control circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 3 .
3. TOTALLY INTEGRATED POWER MODULE Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater Relay 2. With the scan tool, read DTCs. Does the scan tool display active: B10BA-CABIN HEATER 2 CONTROL CIRCUIT OPEN? Yes Replace the Totally Integrated Power Module (TIPM) in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Cabin Heater Relay 2 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on. Battery voltage greater than 10.4 volts.

1. Set Condition: If the Totally Integrated Power Module (TIPM) detects a shorted low condition in the (C123) Condenser Fan Control circuit.

1. When Monitored: With the ignition on. Battery voltage greater than 10.4 volts.

1. Set Condition: If the Totally Integrated Power Module (TIPM) detects a shorted high condition in the (N112) High Speed Radiator Fan Control circuit.

1. When Monitored: With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting Condenser Fan operation.

1. Set Condition: If the Totally Integrated Power Module (TIPM) detects an open condition in the (C123) Condenser Fan Control circuit.

1. When Monitored: With the ignition on.

1. Set Condition: If the Instrument Cluster (CCN) detects that the A/C mode switch stays in a pushed position for more than 5 seconds.

1. When Monitored: With the ignition on.

1. Set Condition: If the Totally Integrated Power Module (TIPM) detects a short to ground on the (C7) Blower Motor Control circuit, when blower motor operation is requested.

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1. VERIFY DTC IS ACTIVE Turn the blower control switch to off. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. Turn the blower control switch to on. With the scan tool, read DTCs. Does the scan tool display active: B10E9-BLOWER MOTOR CONTROL CIRCUIT LOW? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK FOR ACTIVE DTC B10E9-BLOWER MOTOR CONTROL CIRCUIT LOW WITH BLOWER MOTOR HARNESS CONNECTOR DISCONNECTED Turn the blower control switch to off. Disconnect the Blower Motor harness connector. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. Turn the blower control switch to on. With the scan tool, read DTCs. Does the scan tool display active: B10E9-BLOWER MOTOR CONTROL CIRCUIT LOW? Yes Go To 3 . No Replace the Blower Motor in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
3. CHECK THE (C7) BLOWER MOTOR CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the TIPM C8 harness connector. Measure the resistance of the (C7) Blower Motor Control circuit between ground and the Blower Motor harness connector. Does the ohm meter read open circuit? Yes Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Repair the (C7) Blower Motor Control circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting Blower Motor operation.

1. Set Condition: If the Totally Integrated Power Module (TIPM) detects a short to voltage condition on the (C7) Blower Motor Control circuit.

Scheme 27

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1. VERIFY DTC IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the a/c control, turn on the Blower Motor. With the scan tool, read DTCs. Does the scan tool display active: B10EA-BLOWER MOTOR CONTROL CIRCUIT HIGH? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK (C7) BLOWER MOTOR CONTROL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the TIPM C8 harness connector. Disconnect the Blower Motor harness connector. Measure the resistance of the (C7) Blower Motor Control circuit between the TIPM C8 harness connector and the Blower Motor harness connector. Does the ohm meter read open circuit? Yes Repair the (C7) Blower Motor Control circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 3 .
3. CHECK (C7) BLOWER MOTOR CONTROL CIRCUIT FOR SHORT TO VOLTAGE Turn the ignition on. With a volt meter measure the voltage on the (C7) Blower Motor Control circuit. Does the volt meter read above 10.0 volts? Yes Repair the (C7) Blower Motor Control circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 4 .
4. TOTALLY INTEGRATED POWER MODULE Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the a/c control, turn on the Blower Motor. With the scan tool, read DTCs. Does the scan tool display active: B10EA-BLOWER MOTOR CONTROL CIRCUIT HIGH? Yes Replace the Totally Integrated Power Module (TIPM) in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Blower Motor in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on.

1. Set Condition: The Totally Integrated Power Module (TIPM) will set this DTC if it detects an overcurrent condition on the (C7) Blower Motor Control circuit for more than 500 ms when blower motor operation is requested.

Scheme 30

1. VERIFY DTC B10EC-BLOWER MOTOR CONTROL CIRCUIT OVERCURRENT IS ACTIVE Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read DTCs. Does the scan tool display active: B10EC-BLOWER MOTOR CONTROL CIRCUIT OVERCURRENT? Yes Go To 2 . No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
2. CHECK FOR PROPER BLOWER MOTOR OPERATION Turn the ignition on. Turn the Blower Motor on. Does the Blower Motor operate normally? Yes Go To 4 . No Go To 3 .
3. CHECK FOR ACTIVE: B10E9-BLOWER MOTOR CONTROL CIRCUIT LOW Turn the ignition on. With the scan tool, erase DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. Turn on the Blower Motor. With the scan tool, read DTCs. Does the scan tool display active: B10E9-BLOWER MOTOR CONTROL CIRCUIT LOW? Yes Follow the diagnostics for Code «B10E9-BLOWER MOTOR CONTROL CIRCUIT LOW (TIPM)»(ref-304403-S18911896092008110700000) . Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Go To 4 .
4. CHECK FOR 12 VOLTS TO THE BLOWER MOTOR Turn the ignition off. Disconnect the Blower Motor harness connector. Turn the ignition on. Turn the Blower Motor control on. Using a volt meter measure the voltage on the (C7) Blower Motor Control circuit in the Blower Motor harness connector. Does the volt meter read 12 volts? Yes Go To 5 . No Go To 6 .
5. CHECK FOR A BLOCKAGE STALLING THE BLOWER MOTOR Turn the ignition off. Remove the Blower Motor from the HVAC housing assembly. Look for anything on the Blower Motor and in the HVAC housing that is physically preventing Blower Motor operation. Is anything physically preventing Blower Motor operation? Yes Repair as necessary. Also, check Blower Motor for proper operation. Reinstall, or replace the Blower Motor as necessary in accordance with the service information. No Replace the Blower Motor in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .
6. CHECK FOR CHAFING IN THE (C7) BLOWER MOTOR CONTROL CIRCUIT Turn the ignition off. Check the (C7) Blower Motor Control circuit for wire chafing. Is any wire chafing present? Yes Repair the wire chafing on the (C7) Blower Motor Control circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) . No Replace the Totally Integrated Power Module (TIPM) in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-304334-S29410035802008110700000) .

1. When Monitored: With the ignition on.

1. Set Condition: The Totally Integrated Power Module (TIPM) will set this DTC if it detects an overcurrent condition on the (N112) High Speed Radiator Fan Control circuit for more than 500 ms when Radiator Fan operation is requested.