Heating & Air Conditioning - Electrical Diagnostics: Diagnosis Dodge Nitro I

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

ON-BOARD DIAGNOSTICS

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) IHS bus and is fully addressable with a scan tool.

Diagnostic Test

The A/C-heater control's 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 HVAC - ELECTRICAL DIAGNOSTICS for the diagnostic test procedures).

The A/C-heater control's 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.

HVAC System Test

The HVAC System Test, found in this article, 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 control's 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

1. is actuated with a scan tool.
2. tests A/C system performance based on evaporator temperature sensor input.
3. will fail if evaporator starting temperature is below 18° C (65° F) when initiating the test.
4. will pass if the evaporator temperature drops 11° C (20° F).
5. 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.
6. will cause the A/C status indicator to flash while the test is running.

Actuator DTC Detection Test

The Actuator DTC Detection Test

1. is actuated with a scan tool.
2. supplements the continuous diagnostics on the actuator drive system.
3. 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.

1. VERIFY THE DTC IS STILL ACTIVE Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? 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-306151-S09725333202008120900000) .
2. CHECK FOR NORMAL A/C REQUEST SWITCH & STATUS INDICATOR FUNCTION Set the Blower control to any position except Off. Set the Mode control to any position except Auto. Press the A/C request switch on and off several times while observing the A/C status indicator. Does the A/C status indicator turn on and off? Yes Go to 4 . No Go to 3 .
3. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE A/C REQUEST SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the A/C Heater Control for anything that would cause the A/C request switch to stay or stick in a pushed position. Is anything present that would cause the A/C request switch to stay or stick in a pushed position? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. INSPECT THE A/C HEATER CONTROL FOR DAMAGE Inspect the A/C Heater Control for damage. Is the A/C Heater Control damaged? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS STILL ACTIVE Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? 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-306151-S09725333202008120900000) .
2. CHECK FOR NORMAL PANEL MODE SWITCH & STATUS INDICATOR FUNCTION Set the Blower control to any position except Off. Set the Mode control to any position except Auto. Press the Panel mode switch on and off several times while observing the Panel mode status indicator. Does the Panel mode status indicator turn on and off? Yes Go to 4 . No Go to 3 .
3. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE PANEL MODE SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the A/C Heater Control for anything that would cause the Panel mode switch to stay or stick in a pushed position. Is anything present that would cause the Panel mode switch to stay or stick in a pushed position? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. INSPECT THE A/C HEATER CONTROL FOR DAMAGE Inspect the A/C Heater Control for damage. Is the A/C Heater Control damaged? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS STILL ACTIVE Inspect the A/C Heater Control for an object holding the switch in a pushed position. If present, remove the object. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 2 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . 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-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS STILL ACTIVE Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? 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-306151-S09725333202008120900000) .
2. CHECK FOR NORMAL RECIRCULATION SWITCH & STATUS INDICATOR FUNCTION Set the Blower control to any position except Off. Set the Mode control to any position except Auto. Press the Recirculation switch on and off several times while observing the Recirculation status indicator. Does the Recirculation status indicator turn on and off? Yes Go to 4 . No Go to 3 .
3. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE RECIRCULATION SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the A/C Heater Control for anything that would cause the Recirculation switch to stay or stick in a pushed position. Is anything present that would cause the Recirculation switch to stay or stick in a pushed position? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. INSPECT THE A/C HEATER CONTROL FOR DAMAGE Inspect the A/C Heater Control for damage. Is the A/C Heater Control damaged? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS STILL ACTIVE Inspect the A/C Heater Control for an object holding the switch in a pushed position. If present, remove the object. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 2 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . 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-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS STILL ACTIVE Inspect the A/C Heater Control for an object holding the switch in a pushed position. If present, remove the object. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 2 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . 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-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS STILL ACTIVE Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? 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-306151-S09725333202008120900000) .
2. CHECK FOR NORMAL DEFROST SWITCH & STATUS INDICATOR FUNCTION Set the Blower control to any position except Off. Set the Mode control to any position except Auto. Press the Defrost switch on and off several times while observing the Defrost status indicator. Does the Defrost status indicator turn on and off? Yes Go to 4 . No Go to 3 .
3. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE DEFROST SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the A/C Heater Control for anything that would cause the Defrost switch to stay or stick in a pushed position. Is anything present that would cause the Defrost switch to stay or stick in a pushed position? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. INSPECT THE A/C HEATER CONTROL FOR DAMAGE Inspect the A/C Heater Control for damage. Is the A/C Heater Control damaged? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS STILL ACTIVE Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC? 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-306151-S09725333202008120900000) .
2. CHECK FOR NORMAL REAR DEFROST SWITCH & STATUS INDICATOR FUNCTION Set the Blower control to any position except Off. Set the Mode control to any position except Auto. Press the Rear Defrost switch on and off several times while observing the Rear Defrost status indicator. Does the Rear Defrost status indicator turn on and off? Yes Go to 4 . No Go to 3 .
3. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE REAR DEFROST SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the A/C Heater Control for anything that would cause the Rear Defrost switch to stay or stick in a pushed position. Is anything present that would cause the Rear Defrost switch to stay or stick in a pushed position? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. INSPECT THE A/C HEATER CONTROL FOR DAMAGE Inspect the A/C Heater Control for damage. Is the A/C Heater Control damaged? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 1

1. REPLACE THE A/C HEATER CONTROL Repair Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. REPLACE THE A/C HEATER CONTROL Repair Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. REPLACE THE A/C HEATER CONTROL Repair Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 2

1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs Turn the ignition on. With the scan tool, read active HVAC DTCs. Does the scan tool display any active CONTROL CIRCUIT/PERFORMANCE or CONTROL CIRCUIT OPEN DTCs? Yes Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, all other Control Circuit/Performance DTCs second, and all Control Circuit Open DTCs last. Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No Go to 2 .
2. INSPECT ACTUATOR & HOUSING ASSEMBLY FOR A CONDITION CAUSING THE DOOR TO SEIZE OR BIND Turn the ignition off. Inspect the actuator, linkage, and housing assembly for a condition causing the door to seize or bind. Are there any physical or mechanical problems with the door, housing, linkage, or actuator? Yes Repair as necessary in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK MODE DOOR TRAVEL Remove the Mode Door Actuator from the A/C Heater Housing Assembly. By hand, attempt to rotate the door in both directions. The door should operate smoothly in both directions over approximately 90 degrees of travel. Does the door operate smoothly in both directions over approximately 90 degrees of travel? Yes Replace the Mode Door Actuator in accordance with the service information. Then, go to 4 . No Repair as necessary in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. RUN THE ACTUATOR CALIBRATION TEST Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display this DTC as active? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs Turn the ignition on. With the scan tool, read active HVAC DTCs. Does the scan tool display any active CONTROL CIRCUIT/PERFORMANCE or CONTROL CIRCUIT OPEN DTCs? Yes Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, all other Control Circuit/Performance DTCs second, and all Control Circuit Open DTCs last. Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No Go to 2 .
2. CHECK FOR A BROKEN MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR Turn the ignition off. Remove the Mode Door 1 (Floor to Panel) Actuator from the A/C Heater Housing Assembly. By hand, attempt to rotate the actuator in both directions. Does the actuator turn in either direction? Yes Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK MODE 1 (FLOOR TO PANEL) DOOR & A/C HEATER HOUSING FOR WARPED, WORN, DAMAGED, MISSING, & BROKEN COMPONENTS Inspect for excessively worn, disconnected, missing, or broken door linkage. Inspect for a damaged or broken A/C Heater Housing Assembly. Inspect for a warped or broken door, and missing door seals. Rotate the door from stop to stop. The door should rotate approximately 90 degrees. Are there any physical or mechanical problems with the door or housing? Yes Repair as necessary in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the service information. Then, go to 4 .
4. RUN THE ACTUATOR CALIBRATION TEST Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display this DTC as active? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, actuate the Recirculation Door. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? 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-306151-S09725333202008120900000) .
2. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C32) Recirculation Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C32) Recirculation Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C35) Mode Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C35) Mode Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. CHECK (C54) BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C54) Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C54) Blend Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 5 .
5. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C154) Common Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 6 .
6. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance between ground and the (C32) Recirculation Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 7 . No Repair the (C32) Recirculation Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
7. CHECK (C54) DRIVER BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C54) Driver Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 8 . No Repair the (C54) Driver Blend Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
8. CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C35) Mode Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 9 . No Repair the (C35) Mode Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
9. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 10 . No Repair the (C154) Common Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
10. CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to 11 . No Replace the Recirculation Door Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
11. CHECK MODE DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C35) Mode Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to 12 . No Replace the Mode Door Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
12. CHECK BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C54) Blend Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to 13 . No Replace the Blend Door Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
13. RUN THE ACTUATOR CALIBRATION TEST Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool only display: B1058-RECIRCULATION DOOR CONTROL CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No, Other DTC(s) Displayed Diagnose and repair the other DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No, And No Other DTCs Displayed Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an intermittent short. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 3

1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE DTCs Turn the ignition on. With the scan tool, read active HVAC DTCs. Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE DTCs? Yes Diagnose and repair the DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No Go to 2 .
2. CHECK THE RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C2 harness connector. Measure the resistance between the (C268) Recirculation Door Driver circuit and the (C68) Recirculation Door Common Driver circuit in the A/C Heater Control C2 harness connector. Is the resistance above 70.0 ohms? Yes Go to 3 . No Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
3. CHECK THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Recirculation Door Actuator harness connector. Measure the resistance of the (C268) Recirculation Door Driver circuit between the Recirculation Door Actuator harness connector and the A/C Heater Control C2 harness connector. Is the resistance below 5.0 ohms? Yes Go to 4 . No Repair the (C268) Recirculation Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C68) Recirculation Door Common Driver circuit between the Recirculation Door Actuator harness connector and the A/C Heater Control C2 harness connector. Is the resistance below 5.0 ohms? Yes Replace the Recirculation Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (C68) Recirculation Door Common Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs Turn the ignition on. With the scan tool, read active HVAC DTCs. Does the scan tool display any active CONTROL CIRCUIT/PERFORMANCE or CONTROL CIRCUIT OPEN DTCs? Yes Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, all other Control Circuit/Performance DTCs second, and all Control Circuit Open DTCs last. Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No Go to 2 .
2. INSPECT ACTUATOR & HOUSING ASSEMBLY FOR A CONDITION CAUSING THE DOOR TO SEIZE OR BIND Turn the ignition off. Inspect the actuator and the housing assembly for a condition causing the door to seize or bind. Are there any physical or mechanical problems with the door, housing, or actuator? Yes Repair as necessary in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK RECIRCULATION DOOR TRAVEL Remove the Recirculation Door Actuator from the A/C Heater Housing Assembly. By hand, attempt to rotate the door in both directions. The door should operate smoothly in both directions over approximately 70 degrees of travel. Does the door operate smoothly in both directions over approximately 70 degrees of travel? Yes Replace the Recirculation Door Actuator in accordance with the service information. Then, go to 4 . No Repair as necessary in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. RUN THE ACTUATOR CALIBRATION TEST Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display this DTC as active? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs Turn the ignition on. With the scan tool, read active HVAC DTCs. Does the scan tool display any active CONTROL CIRCUIT/PERFORMANCE or CONTROL CIRCUIT OPEN DTCs? Yes Diagnose and repair the DTC(s). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, all other Control Circuit/Performance DTCs second, and all Control Circuit Open DTCs last. Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No Go to 2 .
2. CHECK FOR A BROKEN RECIRCULATION DOOR ACTUATOR Turn the ignition off. Remove the Recirculation Door Actuator from the A/C Heater Housing Assembly. By hand, attempt to rotate the actuator in both directions. Does the actuator turn in either direction? Yes Replace the Recirculation Door Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK RECIRCULATION DOOR & A/C HEATER HOUSING FOR WARPED, WORN, DAMAGED, MISSING, & BROKEN COMPONENTS Inspect for a damaged or broken A/C Heater Housing Assembly, a warped, worn, or broken door, and missing door seals. Rotate the door from stop to stop. The door should rotate approximately 70 degrees. Are there any physical or mechanical problems with the door or housing? Yes Repair as necessary in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Recirculation Door Actuator in accordance with the service information. Then, go to 4 .
4. RUN THE ACTUATOR CALIBRATION TEST Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display this DTC as active? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, actuate the Blend Door. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? 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-306151-S09725333202008120900000) .
2. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C32) Recirculation Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C32) Recirculation Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C35) Mode Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C35) Mode Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. CHECK (C54) BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C54) Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C54) Blend Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 5 .
5. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C154) Common Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 6 .
6. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance between ground and the (C32) Recirculation Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 7 . No Repair the (C32) Recirculation Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
7. CHECK (C54) DRIVER BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C54) Driver Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 8 . No Repair the (C54) Driver Blend Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
8. CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C35) Mode Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 9 . No Repair the (C35) Mode Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
9. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 10 . No Repair the (C154) Common Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
10. CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to 11 . No Replace the Recirculation Door Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
11. CHECK MODE DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C35) Mode Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to 12 . No Replace the Mode Door Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
12. CHECK BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C54) Blend Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to 13 . No Replace the Blend Door Actuator in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
13. RUN THE ACTUATOR CALIBRATION TEST Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool only display: B10A2-LEFT BLEND DOOR CONTROL CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No, Other DTC(s) Displayed Diagnose and repair the other DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No, And No Other DTCs Displayed Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an intermittent short. Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 4

1. REPLACE THE A/C HEATER CONTROL Repair Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THAT THE DTC IS ACTIVE WARNING: When the engine is operating, do not stand in direct line with the fan, do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC. Turn the ignition on. With the scan tool, erase DTCs. With the scan tool, actuate the Cabin Heater Relay. Monitor the scan tool for at least two minutes. With the scan tool, read DTCs. Does the scan tool display this DTC as active? 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 (K360) CABIN HEATER 1 RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the TIPM C1 harness connector. Remove the Cabin Heater Relay. Measure the resistance between ground and the (K360) Cabin Heater 1 Relay Control circuit in the TIPM C1 harness connector. Does the ohm meter read open circuit? Yes Repair the (K360) Cabin Heater 1 Relay Control circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK (K360) CABIN HEATER 1 RELAY CONTROL CIRCUIT FOR AN OPEN Measure the resistance of the (K360) Cabin Heater 1 Relay Control circuit between the Cabin Heater Relay connector and the TIPM C1 harness connector. Does the ohm meter read open circuit? Yes Repair the (K360) Cabin Heater 1 Relay Control circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. CHECK PTC NO. 1 RELAY Install the FCM. Install a substitute PTC No. 1 Relay in place of the vehicle's PTC No. 1 Relay. Turn the ignition on. With the scan tool, erase FCM DTCs. With the scan tool, actuate the PTC No. 1 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read FCM DTCs. Is the status Active for this DTC? Yes Go to 5 . No Replace the PTC No. 1 Relay in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. INSPECT RELATED WIRING & CHECK FOR TSBs Turn the ignition off. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the PTC No. 1 Relay and the FCM. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the FCM in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THAT THE DTC IS ACTIVE WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. NOTE: If the FCM detects and stores a DTC, the FCM also stores the environmental conditions under which the DTC was set. NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC. Turn the ignition on. With the scan tool, erase FCM DTCs. With the scan tool, actuate the PTC No. 2 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read FCM DTCs. Is the status Active for this DTC? Yes Go to 2 . No Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
2. CHECK (K342) FUSED ASD RELAY OUTPUT CIRCUIT FOR AN OPEN OR HIGH RESISTANCE Turn the ignition off. Remove the PTC No. 2 Relay. Turn the ignition on. Using a 12 volt test light connected to ground, check the (K342) Fused ASD Relay Output circuit in the PTC No. 2 Relay harness connector. NOTE: The test light should illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to 3 . No Repair the (K342) Fused ASD Relay Output circuit for an open or high resistance. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
3. CHECK (K361) PTC NO. 2 RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the FCM from the Power Module. Measure the resistance between ground and the (K361) PTC No. 2 Relay Control circuit in the PTC No. 2 Relay connector. Is the resistance above 10.0 ohms? Yes Go to 4 . No Repair the (K361) PTC No. 2 Relay Control circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK (K361) PTC NO. 2 RELAY CONTROL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE Measure the resistance of the (K361) PTC No. 2 Relay Control circuit between the PTC No. 2 Relay connector and the FCM connector. Is the resistance below 10.0 ohms? Yes Go to 5 . No Repair the (K361) PTC No. 2 Relay Control circuit for an open or high resistance. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. CHECK PTC NO. 2 RELAY Install the FCM. Install a substitute PTC No. 2 Relay in place of the vehicle's PTC No. 2 Relay. Turn the ignition on. With the scan tool, erase FCM DTCs. With the scan tool, actuate the PTC No. 2 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read FCM DTCs. Is the status Active for this DTC? Yes Go to 6 . No Replace the PTC No. 2 Relay in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
6. INSPECT RELATED WIRING & CHECK FOR TSBs Turn the ignition off. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the PTC No. 2 Relay and the FCM. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Front Control Module (FCM) in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THAT THE DTC IS ACTIVE WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. NOTE: If the FCM detects and stores a DTC, the FCM also stores the environmental conditions under which the DTC was set. NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC. Turn the ignition on. With the scan tool, erase FCM DTCs. With the scan tool, actuate the PTC No. 2 Relay. Monitor the scan tool for at least two minutes. With the scan tool, read FCM DTCs. Is the status Active for this DTC? Yes Go to 2 . No Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
2. CHECK PTC NO. 2 RELAY With the scan tool, erase FCM DTCs. Turn the ignition off. Remove the PTC No. 2 Relay. Turn the ignition on. With the scan tool, actuate the PTC No. 2 Relay. With the scan tool, read FCM DTCs. NOTE: The scan tool should display an open circuit DTC with the PTC No. 2 Relay removed. Does the scan tool display: B10B9-CABIN HEATER 2 CONTROL CIRCUIT HIGH? Yes Go to 3 . No Replace the PTC No. 2 Relay in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
3. CHECK (K361) PTC NO. 2 RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the FCM from the Power Module. Remove the ASD Relay from the IPM. Connect a jumper wire between cavity 30 and cavity 87 of the ASD Relay Connector. Turn the ignition on. Measure the voltage of the (K361) PTC No. 2 Relay Control circuit in the PTC No. 2 Relay connector. Is there any voltage present? Yes Repair the (K361) PTC No. 2 Relay Control circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 4 .
4. CHECK (K361) PTC NO. 2 RELAY CONTROL FOR AN OPEN OR HIGH RESISTANCE Turn the ignition off. Measure the resistance of the (K361) PTC No. 2 Relay Control circuit between the PTC No. 2 Relay connector and the FCM connector. Is the resistance below 10.0 ohms? Yes Go to 5 . No Repair the (K361) PTC No. 2 Relay Control circuit for an open or high resistance. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. INSPECT RELATED WIRING & CHECK FOR TSBs Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the PTC No. 2 Relay and the FCM. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Refer to any Technical Service Bulletins that may apply. Were any problems found? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the FCM in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

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-306151-S09725333202008120900000) .
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-306151-S09725333202008120900000) . 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-306151-S09725333202008120900000) . 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-306151-S09725333202008120900000) . No Replace the Blower Motor in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

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-306151-S09725333202008120900000) .
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 5 . No Go to 3 .
3. 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 4 . No Go to 5 .
4. 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-306151-S09725333202008120900000) .
5. 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-306151-S09725333202008120900000) . No Replace the Totally Integrated Power Module (TIPM) in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

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-306151-S09725333202008120900000) .
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-306151-S09725333202008120900000) .
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-306151-S09725333202008120900000) . No Replace the Cabin Heater Relay 2 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

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-306151-S09725333202008120900000) .
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-306151-S09725333202008120900000) . 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-306151-S09725333202008120900000) . No Replace the Cabin Heater Relay 2 in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. VERIFY THE DTC IS ACTIVE Turn the ignition switch on. With a scan tool, read and record DTCs. With the scan tool, clear DTCs. Turn the ignition switch off, and then on. Using the scan tool, read DTCs. Does the scan tool display this DTC as active? 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-306151-S09725333202008120900000) .
2. CHECK FOR ACTIVE DTC WITH SUNLOAD SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Sunload Sensor harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as active? Yes Go to 3 . No Replace the Sunload Sensor in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
3. CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (L24) Auto Headlamps Signal circuit between ground and the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (L24) Auto Headlamps Signal circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. ACTIVE DTC(S) PRESENT Turn the ignition on. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? 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-306151-S09725333202008120900000) .
2. CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Sunload Sensor harness connector. Measure the resistance of the (L24) Auto Headlamps Signal circuit between the Sunload Sensor harness connector and the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Repair the (L24) Auto Headlamps Signal circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (L24) Auto Headlamps Signal circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to 4 . No Repair the (L24) Auto Headlamps Signal circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sensor Ground circuit between the Sunload Sensor harness connector and the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Repair the (C121) Sensor Ground circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 5 .
5. CHECK THE SUNLOAD SENSOR Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Using the scan tool, observe the Auto Headlamp signal while connecting a jumper wire between the (L24) Auto Headlamps Signal circuit and the (C121) Sensor Ground circuit in the Sunload Sensor harness connector. Does the Auto Headlamp signal change from approximately 5 volts to 0 volts? Yes Replace the Sunload Sensor in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

1. CHECK FOR ACTIVE DTC WITH THE SUNLOAD SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Sunload Sensor harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as active? Yes Go to 2 . No Replace the Sunload Sensor in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the voltage of the (L24) Auto Headlamps Signal circuit between ground and the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (L24) Auto Headlamps Signal circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 5

1. ACTIVE DTC(S) PRESENT Turn the ignition on. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Replace the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . 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-306151-S09725333202008120900000) .

1. ACTIVE DTC(S) PRESENT Turn the ignition on. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? 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-306151-S09725333202008120900000) .
2. CHECK VEHICLE LINE IN PCM With the scan tool compare the vehicle line that is programmed into the PCM to the vehicle line of the vehicle. Does the vehicle line programmed into the PCM match the vehicle? Yes Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the A/C Heater Control in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace and program the Powertrain Control Module in accordance with the service information. Ensure the PCM is replaced with the correct vehicle line PCM. Perform «POWERTRAIN VERIFICATION TEST»(ref-306217-S13377649292008120900000) .

1. VERIFY THE DTC IS ACTIVE Turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display this DTC as active? Yes Go to 2 . No If the DTC is stored, 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. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
2. CHECK FOR ACTIVE CAN BUS RELATED DTCS IN THE TOTALLY INTEGRATE POWER MODULE (TIPM) With the scan tool, read the Totally Integrated Power Module (TIPM) DTCs Does the scan tool display any active CAN BUS related DTCs? Yes Diagnose and repair the DTC(s). Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go to 3 .
3. CHECK (D265) CAN INTERIOR BUS (+) CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the negative battery cable. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Totally Integrated Power Module (TIPM) C7 harness connector. Measure the resistance of the (D265) CAN Interior Bus (+) circuit between the Totally Integrated Power Module (TIPM) C7 harness connector and the A/C Heater Control C1 harness connector. Is the resistance below 2.0 ohms? Yes Go to 4 . No Repair the (D265) CAN Interior Bus (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
4. CHECK (D264) CAN INTERIOR BUS (-) CIRCUIT FOR AN OPEN Measure the resistance of the (D264) CAN Interior Bus (-) circuit between the Totally Integrated Power Module (TIPM) C7 connector and the A/C Heater Control C1 harness connector. Is the resistance below 2.0 ohms? Yes Go to 5 . No Repair the (D264) CAN Interior Bus (-) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. CHECK (D265) CAN C INTERIOR BUS (+) CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (D265) CAN C Interior Bus (125K) (+) circuit in the A/C Heater Control C1 harness connector. Is the resistance above 1000.0 ohms? Yes Go to 6 . No Repair the (D265) CAN C Interior Bus (+) circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
6. CHECK (D264) CAN C INTERIOR BUS (-) CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (D264) CAN C Interior Bus (125K) (-) circuit in the A/C Heater Control C1 harness connector. Is the resistance above 1000.0 ohms? Yes Go to 7 . No Repair the (D264) CAN C Interior Bus (-) circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
7. CHECK (D265) CAN C INTERIOR BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition on. Measure the voltage of the (D265) CAN C Interior Bus (125K) (+) circuit in the A/C Heater Control C1 harness connector. Is the voltage below 0.2 volts? Yes Go to 8 . No Repair the (D265) CAN C Interior Bus (+) circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
8. CHECK (D264) CAN C INTERIOR BUS (-) CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (D264) CAN C Interior Bus (125K) (-) circuit in the A/C Heater Control C1 harness connector. Is the voltage below 0.2 volts? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (D264) CAN C Interior Bus (-) circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

1. HVAC SYSTEM TEST NOTE: The HVAC System Test consists of four tests. Test 2 tests A/C system performance, Test 3 tests for mode switch, door actuator circuit, and auxiliary coolant pump circuit faults, Test 4 tests for shorted door actuator circuits, and Test 5 tests for door actuator calibration faults. Either perform all four tests for a complete system test or perform an individual test if diagnosing a specific symptom. NOTE: Active DTCs must be resolved before diagnosing stored DTCs. Start the engine. With the scan tool, erase HVAC DTCs. Choose a diagnostic test to perform Complete HVAC System Test Go to step 2 . A/C System Performance Test Go to step 2 . Mode Switch, Door Actuator Ckt, & Auxiliary Coolant Pump Ckt Test Go to step 3 . Actuator DTC Detection Test Go to step 4 . Actuator Calibration Test Go to step 5 .
2. A/C SYSTEM PERFORMANCE TEST NOTE: The work area ambient temperature must be above 15.6°C (60°F) and the evaporator temperature must be above 18.3°C (65°F) in order to test A/C system performance. NOTE: Before actuating the Cooldown Test, verify that the mode setting is not in a defrost position and that the 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 with the test. NOTE: Running the Cooldown test will cause the A/C status indicator to flash. NOTE: 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. Set the mode to the Panel position. Verify that the front blower motor operates correctly in all speeds. Diagnose and repair all blower related faults before proceeding with this test. Set the front blower speed to high. 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, Conditions Too Cold - Test Not Run If running, turn the A/C compressor off. Verify that the work area ambient temperature is above 15.6°C (60°F). If not, move the vehicle to a warmer work area. Verify that the evaporator temperature is above 18.3°C (65°F). If not, set the front blower to high speed and allow the blower to run for five minutes. Then, rerun the Cooldown Test. Yes, Blowers Not On High - Test Not Run Set the front blower speed to high speed and then rerun the Cooldown Test. Yes, No Results Stored/Test Not Complete Verify that power is not interrupted while rerunning the Cooldown Test. No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
3. MODE SWITCH, DOOR ACTUATOR CIRCUIT, & AUXILIARY COOLANT PUMP CIRCUIT TEST NOTE: If at anytime a DTC becomes active during this test, proceed to the conclusion question. NOTE: If multiple DTCs become active, diagnose those that relate to a short circuit first. Set the front blower speed to low. Set the Blend control to full cold. Set the Mode control to Bi-Level/Recirc. If equipped, set the Rear Fan switch on the Rear A/C Heater Control to off. If equipped, set the Rear Blend switch on the Rear A/C Heater Control to full cold. Monitor the scan tool for active HVAC DTCs while performing the following test steps. Press the A/C mode switch on, wait 30 seconds, press it off, and then proceed to the next step. Press the Rear Defrost mode switch on, wait 30 seconds, press it off, and then proceed to the next step. Press and hold the Rear Washer mode switch for several seconds, release it, and then proceed to the next step. Set the Blend control to full hot, wait 30 seconds and then set it to full cold. Turn the Mode control to every door position. Leave it in each position for 30 seconds. If equipped, set the Rear Blower control to Rear Control. If equipped, set the Rear Fan switch on the Rear A/C Heater Control to high speed. If equipped, slowly turn the Rear Blend switch on the Rear A/C Heater Control to full hot, wait 30 seconds and then turn it back to full cold. If equipped, turn the Rear Fan switch on the Rear A/C Heater Control to off. If equipped with rear HVAC, with the scan tool, select the following: Actuators, Auxiliary Coolant Pump, Start, and Constant On. Allow the pump to run for approximately one minute. Does the scan tool display any active DTCs? Yes Diagnose and repair the DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of HVAC related symptoms. No As necessary, either go to step 4 or step 5 , or Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . Refer to «STANDARD PROCEDURE»(ref-306151-S01741500622008120900000) .
4. ACTUATOR DTC DETECTION TEST With the scan tool, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool display any DTCs? Yes Diagnose and repair the DTC(s). If multiple DTCs are present, beginning with the common circuits, diagnose and repair all short high DTCs and then all short low DTCs. Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
5. ACTUATOR CALIBRATION TEST With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display any DTCs? Yes Diagnose and repair the DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-306156-S18636489702008120900000) for a complete list of all HVAC related symptoms. No No problem found. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .