HVAC Systems - Electrical Diagnostics: Other Dodge Durango II рестайлинг

Monitor Conditions

1. When Monitored: With the ignition on.

Set Conditions

1. Set Condition: If the A/C mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Possible Causes

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 either *HVAC SYSTEM TEST (ATC) or to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: With the ignition on.

1. Set Condition: If the Panel mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Bi-Level mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Recirculation mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Floor mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Mix mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Front Defrost mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Rear Defrost mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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 either *HVAC SYSTEM TEST (ATC) or *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: With the ignition on.

1. Set Condition: If the Temp mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Temp mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Power mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Blower mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the Blower mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If low and high rear blower speeds are requested simultaneously. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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. 1) CHECK VOLTAGE OF (C804) REAR BLOWER LOW CIRCUIT, (C803) REAR BLOWER MEDIUM CIRCUIT, & (C802) REAR BLOWER HIGH CIRCUIT Turn the ignition off. Disconnect the A/C Heater Control C2 harness connector. Turn the ignition on. Measure the voltage of the (C804) Rear Blower Low circuit. Measure the voltage of the (C803) Rear Blower Medium circuit. Measure the voltage of the (C802) Rear Blower High circuit. Is the voltage above 0.2 volts on any of the circuits? Yes Go to 2) . No Go to 6) .
2. 2) CHECK (C804) REAR BLOWER LOW CIRCUIT, (C803) REAR BLOWER MEDIUM CIRCUIT, & (C802) REAR BLOWER HIGH CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Remove Junction Block Fuse 24. Turn the ignition on. Measure the voltage of the (C804) Rear Blower Low circuit. Measure the voltage of the (C803) Rear Blower Medium circuit. Measure the voltage of the (C802) Rear Blower High circuit. Is the voltage above 0.2 volts on any of the circuits? Yes Repair the circuit(s) with voltage above 0.2 volts for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C804) REAR BLOWER LOW CIRCUIT FOR A SHORT TO (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT Turn the ignition off. Disconnect the Rear A/C Heater Control harness connector. Measure the resistance between the (C804) Rear Blower Low circuit and the (F504) Fused Ignition Switch Output (Run) circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms? Yes Go to 4) . No Go to 4) .
4. 4) CHECK (C803) REAR BLOWER MEDIUM CIRCUIT FOR A SHORT TO (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT Measure the resistance between the (C803) Rear Blower Medium circuit and the (F504) Fused Ignition Switch Output (Run) circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms? Yes Go to 5) . No Go to 5) .
5. 5) CHECK (C802) REAR BLOWER HIGH CIRCUIT FOR A SHORT TO (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT Measure the resistance between the (C802) Rear Blower High circuit and the (F504) Fused Ignition Switch Output (Run) circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms on any of the circuits tested in Steps 3, 4, & 5? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to the (F504) Fused Ignition Switch Output (Run) circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 6) .
6. 6) CHECK (C804) REAR BLOWER LOW CIRCUIT FOR A SHORT TO (C803) REAR BLOWER MEDIUM CIRCUIT If not done so previously, turn the ignition off. If not done so previously, disconnect the Rear A/C Heater Control harness connector. Measure the resistance between the (C804) Rear Blower Low circuit and the (C803) Rear Blower Medium circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms? Yes Go to 7) . No Go to 7) .
7. 7) CHECK (C804) REAR BLOWER LOW CIRCUIT FOR A SHORT TO (C802) REAR BLOWER HIGH CIRCUIT Measure the resistance between the (C804) Rear Blower Low circuit and the (C802) Rear Blower High circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms? Yes Go to 8) . No Go to 8) .
8. 8) CHECK (C803) REAR BLOWER MEDIUM CIRCUIT FOR A SHORT TO (C802) REAR BLOWER HIGH CIRCUIT Measure the resistance between the (C803) Rear Blower Medium circuit and the (C802) Rear Blower High circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms on any of the circuits tested in Steps 6, 7, & 8? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to the other rear blower circuit(s). Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 9) .
9. 9) CHECK FOR DTC B1027-REAR BLOWER CONTROL REQUEST INPUT CIRCUIT/PERFORMANCE WITH REAR A/C HEATER CONTROL DISCONNECTED NOTE: Make sure that the Rear A/C Heater Control is disconnected. Reconnect the A/C Heater Control C2 harness connector. If removed, reinstall Junction Block Fuse 24. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. Set the Rear Function mode switch to Control In Rear. With the scan tool, read HVAC DTCs. Does the scan tool display: B1027-REAR BLOWER CONTROL REQUEST INPUT CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the Rear Function mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the rear blend pot is out of range towards the low voltage threshold. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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. 1) CHECK FOR DTC B102E-REAR BLEND REQUEST INPUT CIRCUIT LOW WITH REAR A/C HEATER CONTROL DISCONNECTED Turn the ignition off. Disconnect the Rear A/C Heater Control 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, read HVAC DTCs. Does the scan tool display: B102E-REAR BLEND REQUEST INPUT CIRCUIT LOW? Yes Go to 2) . No Replace the Rear A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
2. 2) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT & (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C2 harness connector. Measure the resistance of the (C800) Rear Blend Sense Supply circuit between ground and the A/C Heater Control C2 harness connector. Measure the resistance of the (C22) Rear Blend Sense circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms on either of the circuits? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT FOR A SHORT TO (C931) REAR BLEND SENSE RETURN CIRCUIT Measure the resistance between the (C800) Rear Blend Sense Supply circuit and the (C931) Rear Blend Sense Return circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Go to 4) . No Go to 4) .
4. 4) CHECK (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO (C931) REAR BLEND SENSE RETURN CIRCUIT Measure the resistance between the (C22) Rear Blend Sense circuit and the (C931) Rear Blend Sense Return circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms on either of the circuits tested in Steps 3 & 4? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to the (C931) Rear Blend Sense Return circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT FOR AN OPEN Measure the resistance of the (C800) Rear Blend Sense Supply circuit between the A/C Heater Control C2 harness connector and the Rear A/C Heater Control harness connector. Is the resistance below 5.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C800) Rear Blend Sense Supply circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 167

1. When Monitored: With the ignition on.

1. Set Condition: If the rear blend pot is out of range towards the low voltage threshold. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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 (MTC) for stored DTC test procedures.

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1. 1) CHECK FOR DTC B102E-REAR BLEND REQUEST INPUT CIRCUIT LOW WITH REAR A/C HEATER CONTROL DISCONNECTED Turn the ignition off. Disconnect the Rear A/C Heater Control 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, read HVAC DTCs. Does the scan tool display: B102E-REAR BLEND REQUEST INPUT CIRCUIT LOW? Yes Go to 2) . No Replace the Rear A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
2. 2) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT & (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C800) Rear Blend Sense Supply circuit between ground and the A/C Heater Control C1 harness connector. Measure the resistance of the (C22) Rear Blend Sense circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms on either of the circuits? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT FOR A SHORT TO (C931) REAR BLEND SENSE RETURN CIRCUIT Measure the resistance between the (C800) Rear Blend Sense Supply circuit and the (C931) Rear Blend Sense Return circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Go to 4) . No Go to 4) .
4. 4) CHECK (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO (C931) REAR BLEND SENSE RETURN CIRCUIT Measure the resistance between the (C22) Rear Blend Sense circuit and the (C931) Rear Blend Sense Return circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms on either of the circuits tested in Steps 3 & 4? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to the (C931) Rear Blend Sense Return circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT FOR AN OPEN Measure the resistance of the (C800) Rear Blend Sense Supply circuit between the A/C Heater Control C1 harness connector and the Rear A/C Heater Control harness connector. Is the resistance below 5.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C800) Rear Blend Sense Supply circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 173

1. When Monitored: With the ignition on.

1. Set Condition: If the rear blend pot is out of range towards the high voltage threshold. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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. 1) CHECK VOLTAGE OF (C800) REAR BLEND SENSE SUPPLY CIRCUIT & (C22) REAR BLEND SENSE CIRCUIT Turn the ignition off. Disconnect the A/C Heater Control C2 harness connector. Turn the ignition on. Measure the voltage of the (C800) Rear Blend Sense Supply circuit. Measure the voltage of the (C22) Rear Blend Sense circuit. Is the voltage above 0.2 volts on either of the circuits? Yes Go to 2) . No Go to 5) .
2. 2) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT & (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Remove Junction Block Fuse 24. Turn the ignition on. Measure the voltage of the (C800) Rear Blend Sense Supply circuit. Measure the voltage of the (C22) Rear Blend Sense circuit. Is the voltage above 0.2 volts on either of the circuits? Yes Repair the circuit(s) with voltage above 0.2 volts for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT FOR A SHORT TO (C802) REAR BLOWER HIGH CIRCUIT, (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT, (C804) REAR BLOWER LOW CIRCUIT, & (C803) REAR BLOWER MEDIUM CIRCUIT Turn the ignition off. Disconnect the Rear A/C Heater Control harness connector. Measure the resistance between the (C800) Rear Blend Sense Supply circuit and the (C802) Rear Blower High circuit, the (F504) Fused Ignition Switch Output (Run) circuit, the (C804) Rear Blower Low circuit, and the (C803) Rear Blower Medium circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms on any of the circuits? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to the (C800) Rear Blend Sense Supply circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) CHECK (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO (C802) REAR BLOWER HIGH CIRCUIT, (F504) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT, (C804) REAR BLOWER LOW CIRCUIT, & (C803) REAR BLOWER MEDIUM CIRCUIT Measure the resistance between the (C22) Rear Blend Sense circuit and the (C802) Rear Blower High circuit, the (F504) Fused Ignition Switch Output (Run) circuit, the (C804) Rear Blower Low circuit, and the (C803) Rear Blower Medium circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms on any of the circuits? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to the (C22) Rear Blend Sense circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C22) REAR BLEND SENSE CIRCUIT FOR AN OPEN If not done so previously, turn the ignition off. If not done so previously, disconnect the Rear A/C Heater Control harness connector. Measure the resistance of the (C22) Rear Blend Sense circuit between the A/C Heater Control C2 harness connector and the Rear A/C Heater Control harness connector. Is the resistance below 5.0 ohms? Yes Go to 6) . No Repair the (C22) Rear Blend Sense circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
6. 6) CHECK REAR BLEND CONTROL Check the Rear Blend control in the Rear A/C Heater Control as follows: Turn the Rear Blend control on the Rear A/C Heater Control to the full hot position. Measure the resistance between the Rear Blend Supply terminal and the Rear Blend Sense terminal in the Rear A/C Heater Control. The resistance should be approximately 2.5k ohms. Slowly rotate the Rear Blend control from full hot to full cold while observing the DVOM. The reading should change fluidly from approximately 2.5k to 12k ohms. Measure the resistance between the Rear Blend Supply terminal and the Rear Blend Return terminal in the Rear A/C Heater Control. The resistance should be approximately 10k ohms. Slowly rotate the Rear Blend control from full cold to full hot while observing the DVOM. The reading should remain steady at approximately 10k ohms. With the Rear Blend control in full hot, measure the resistance between the Rear Blend Sense terminal and the Rear Blend Return terminal in the Rear A/C Heater Control. The resistance should be approximately 11k ohms. Slowly rotate the Rear Blend control from full hot to full cold while observing the DVOM. The reading should change fluidly from approximately 11k to 2.5k ohms. Are the resistance readings as specified? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 178

1. When Monitored: With the ignition on.

1. Set Condition: If the rear blend pot is out of range towards the high voltage threshold. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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 (MTC) for stored DTC test procedures.

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1. 1) CHECK VOLTAGE OF (C800) REAR BLEND SENSE SUPPLY CIRCUIT & (C22) REAR BLEND SENSE CIRCUIT Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C800) Rear Blend Sense Supply circuit. Measure the voltage of the (C22) Rear Blend Sense circuit. Is the voltage above 0.2 volts on either of the circuits? Yes Go to 2) . No Go to 7) .
2. 2) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT & (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Remove Junction Block Fuse 24. Turn the ignition on. Measure the voltage of the (C800) Rear Blend Sense Supply circuit. Measure the voltage of the (C22) Rear Blend Sense circuit. Is the voltage above 0.2 volts on either of the circuits? Yes Repair the circuit(s) with voltage above 0.2 volts for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT FOR A SHORT TO (F504) IGNITION SWITCH OUTPUT (RUN) CIRCUIT Turn the ignition off. Measure the resistance between the (C800) Rear Blend Sense Supply circuit and the (F504) Ignition Switch Output (Run) circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C800) Rear Blend Sense Supply circuit for a short to the (F504) Ignition Switch Output (Run) circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) CHECK (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO (F504) IGNITION SWITCH OUTPUT (RUN) CIRCUIT Measure the resistance between the (C22) Rear Blend Sense circuit and the (F504) Ignition Switch Output (Run) circuit the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C22) Rear Blend Sense circuit for a short to the (F504) Ignition Switch Output (Run) circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C800) REAR BLEND SENSE SUPPLY CIRCUIT FOR A SHORT TO (C50) REAR BLOWER CONTROL FEED CIRCUIT Disconnect the A/C Heater Control C2 harness connector. Disconnect the Rear A/C Heater Control harness connector. Measure the resistance between the (C800) Rear Blend Sense Supply circuit and the (C50) Rear Blower Control Feed circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms? Yes Repair the (C800) Rear Blend Sense Supply circuit for a short to the (C50) Rear Blower Control Feed circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 6) .
6. 6) CHECK (C22) REAR BLEND SENSE CIRCUIT FOR A SHORT TO (C50) REAR BLOWER CONTROL FEED CIRCUIT Measure the resistance between the (C22) Rear Blend Sense circuit and the (C50) Rear Blower Control Feed circuit in the Rear A/C Heater Control harness connector. Is the resistance below 10k ohms? Yes Repair the (C22) Rear Blend Sense circuit for a short to the (C50) Rear Blower Control Feed circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 7) .
7. 7) CHECK (C22) REAR BLEND SENSE CIRCUIT FOR AN OPEN If not done so previously, turn the ignition off. If not done so previously, disconnect the Rear A/C Heater Control harness connector. Measure the resistance of the (C22) Rear Blend Sense circuit between the A/C Heater Control C1 harness connector and the Rear A/C Heater Control harness connector. Is the resistance below 5.0 ohms? Yes Go to 8) . No Repair the (C22) Rear Blend Sense circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
8. 8) CHECK REAR BLEND CONTROL Check the Rear Blend control in the Rear A/C Heater Control as follows: Turn the Rear Blend control on the Rear A/C Heater Control to the full hot position. Measure the resistance between the Rear Blend Supply terminal and the Rear Blend Sense terminal in the Rear A/C Heater Control. The resistance should be approximately 2.5k ohms. Slowly rotate the Rear Blend control from full hot to full cold while observing the DVOM. The reading should change fluidly from approximately 2.5k to 12k ohms. Measure the resistance between the Rear Blend Supply terminal and the Rear Blend Return terminal in the Rear A/C Heater Control. The resistance should be approximately 10k ohms. Slowly rotate the Rear Blend control from full cold to full hot while observing the DVOM. The reading should remain steady at approximately 10k ohms. With the Rear Blend control in full hot, measure the resistance between the Rear Blend Sense terminal and the Rear Blend Return terminal in the Rear A/C Heater Control. The resistance should be approximately 11k ohms. Slowly rotate the Rear Blend control from full hot to full cold while observing the DVOM. The reading should change fluidly from approximately 11k to 2.5k ohms. Are the resistance readings as specified? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 185

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, (A/D counts reach low threshold of 16). This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1031 must be active for the results of this test to be valid. Do not perform this test if DTC B1031 is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 186

Scheme 187

Scheme 188

Scheme 189

Scheme 190

1. 1) CHECK FOR DTC B1031-EVAPORATOR FIN TEMPERATURE SENSOR CIRCUIT LOW WITH IN-LINE C202 HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the in-line C202 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: B1031-EVAPORATOR FIN TEMPERATURE SENSOR CIRCUIT LOW? Yes Go to 2) . No Go to 4) .
2. 2) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C2 harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to ground between the A/C Heater Control C2 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO (C121) SENSOR GROUND Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to the (C121) Sensor Ground circuit between the A/C Heater Control C2 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Evaporator Temperature Sensor harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between ground and the Evaporator Temperature Sensor harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to ground between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO (C121) SENSOR GROUND Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit in the Evaporator Temperature Sensor harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to the (C121) Sensor Ground circuit between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Evaporator Temperature Sensor in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 191

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, (A/D counts reach low threshold of 16). This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1031 must be active for the results of this test to be valid. Do not perform this test if DTC B1031 is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 192

Scheme 193

Scheme 194

Scheme 195

Scheme 196

1. 1) CHECK FOR DTC B1031-EVAPORATOR FIN TEMPERATURE SENSOR CIRCUIT LOW WITH IN-LINE C202 HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the in-line C202 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: B1031-EVAPORATOR FIN TEMPERATURE SENSOR CIRCUIT LOW? Yes Go to 2) . No Go to 4) .
2. 2) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR 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 (C21) Evaporator Temperature Sensor Signal circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to ground between the A/C Heater Control C1 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO (C121) SENSOR GROUND Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to the (C121) Sensor Ground circuit between the A/C Heater Control C1 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Evaporator Temperature Sensor harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between ground and the Evaporator Temperature Sensor harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to ground between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO (C121) SENSOR GROUND Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit in the Evaporator Temperature Sensor harness connector. Is the resistance below 10k ohms? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to the (C121) Sensor Ground circuit between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Evaporator Temperature Sensor in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the Evaporator Temperature Sensor input is out of range toward the high voltage threshold, (A/D counts reach high threshold of 240). This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

Scheme 197

Scheme 198

Scheme 199

Scheme 200

Scheme 201

1. 1) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C2 harness connector. Turn the ignition on. Measure the voltage of the (C21) Evaporator Temperature Sensor Signal circuit. Is the voltage above 0.2 volts? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT, (C121) SENSOR GROUND CIRCUIT, & EVAPORATOR TEMPERATURE SENSOR Turn the ignition off. Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit in the A/C Heater Control C2 harness connector. The approximate circuit resistance should be as follows: 1468 ohms @ 40°C (104°F) 1800 ohms @ 35°C (95°F) 2221 ohms @ 30°C (86°F) 2757 ohms @ 25°C (77°F) 3443 ohms @ 20°C (68°F) 4330 ohms @ 15°C (59°F) 5485 ohms @ 10°C (50°F) 6998 ohms @ 5°C (41°F) 7354 ohms @ 4°C (39°F) 7731 ohms @ 3°C (37°F) 8130 ohms @ 2°C (36°F) 8553 ohms @ 1°C (34°F) 9000 ohms @ 0°C (32°F) Is the resistance within the specifications? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN Disconnect the in-line C202 harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between the A/C Heater Control C2 harness connector and the in-line C202 (IP SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open between the A/C Heater Control C2 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sensor Ground circuit between the A/C Heater Control C2 harness connector and the in-line C202 (IP SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Go to 5) . No Repair the (C121) Sensor Ground circuit for an open between the A/C Heater Control C2 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN Disconnect the Evaporator Temperature Sensor harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Go to 6) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
6. 6) CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sensor Ground circuit between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Replace the Evaporator Temperature Sensor in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C121) Sensor Ground circuit for an open between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the Evaporator Temperature Sensor input is out of range toward the high voltage threshold, (A/D counts reach high threshold of 240). This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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 (MTC) for stored DTC test procedures.

Scheme 202

Scheme 203

Scheme 204

Scheme 205

Scheme 206

1. 1) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL 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 (C21) Evaporator Temperature Sensor Signal circuit. Is the voltage above 0.2 volts? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT, (C121) SENSOR GROUND CIRCUIT, & EVAPORATOR TEMPERATURE SENSOR Turn the ignition off. Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit in the A/C Heater Control C1 harness connector. The approximate circuit resistance should be as follows: 1468 ohms @ 40°C (104°F) 1800 ohms @ 35°C (95°F) 2221 ohms @ 30°C (86°F) 2757 ohms @ 25°C (77°F) 3443 ohms @ 20°C (68°F) 4330 ohms @ 15°C (59°F) 5485 ohms @ 10°C (50°F) 6998 ohms @ 5°C (41°F) 7354 ohms @ 4°C (39°F) 7731 ohms @ 3°C (37°F) 8130 ohms @ 2°C (36°F) 8553 ohms @ 1°C (34°F) 9000 ohms @ 0°C (32°F) Is the resistance within the specifications? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN Disconnect the in-line C202 harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between the A/C Heater Control C1 harness connector and the in-line C202 (IP SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open between the A/C Heater Control C1 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sensor Ground circuit between the A/C Heater Control C1 harness connector and the in-line C202 (IP SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Go to 5) . No Repair the (C121) Sensor Ground circuit for an open between the A/C Heater Control C1 harness connector and the in-line C202 (IP SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR AN OPEN Disconnect the Evaporator Temperature Sensor harness connector. Measure the resistance of the (C21) Evaporator Temperature Sensor Signal circuit between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Go to 6) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
6. 6) CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sensor Ground circuit between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Is the resistance below 5.0 ohms? Yes Replace the Evaporator Temperature Sensor in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C121) Sensor Ground circuit for an open between the Evaporator Temperature Sensor harness connector and the in-line C202 (HVAC SIDE) harness connector. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the Compass Temperature Module (EOM) detects a short to ground on the (C38) Infrared Sensor Signal circuit.

1. When Monitored: With the ignition on.

1. Set Condition: If the Compass Temperature Module (EOM) detects a short high or open on the (C83) Infrared Sensor Signal circuit.

1. When Monitored: With the ignition on.

1. Set Condition: If the Auto mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on the (C53) Rear Mode Door Driver circuit, the (C54) Rear Blend Door Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C154) Rear Common Door Driver circuit, or the (C808) Common Door Driver 3 circuit while attempting to drive the Rear Mode Door Actuator, the Rear Blend Door Actuator, or the Mode Door 2 (Floor to Panel) Actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored, it will stay in memory for 100 ignition cycles.

Note. The DTC must be active for the results of this test to be valid. Do not perform this test if the DTC is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 207

Scheme 208

Scheme 209

Scheme 210

Scheme 211

Scheme 212

Scheme 213

Scheme 214

Scheme 215

Scheme 216

1. 1) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT, (C54) REAR BLEND DOOR DRIVER CIRCUIT, (C808) COMMON DOOR DRIVER 3 CIRCUIT, (C154) REAR COMMON DOOR DRIVER CIRCUIT, & (C801) MODE DOOR 2 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 (C53) Rear Mode Door Driver circuit. Measure the voltage of the (C54) Rear Blend Door Driver circuit. Measure the voltage of the (C808) Common Door Driver 3 circuit. Measure the voltage of the (C154) Rear Common Door Driver circuit. Measure the voltage of the (C801) Mode Door 2 Driver circuit. Is the voltage above 0.2 volts on any of the circuits? Yes Repair the circuit(s) with voltage above 0.2 volts for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT, (C54) REAR BLEND DOOR DRIVER CIRCUIT, (C808) COMMON DOOR DRIVER 3 CIRCUIT, (C154) REAR COMMON DOOR DRIVER CIRCUIT, & (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C53) Rear Mode Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Measure the resistance of the (C54) Rear Blend Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Measure the resistance of the (C808) Common Door Driver 3 circuit between ground and the A/C Heater Control C1 harness connector. Measure the resistance of the (C154) Rear Common Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Measure the resistance of the (C801) Mode Door 2 Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms on any of the circuits? Yes Repair the circuit(s) with a resistance below 10k ohms for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C54) Rear Blend Door Driver circuit, the (C808) Common Door Driver 3 circuit, the (C32) Recirculation Door Driver circuit, the (C34) Common Door Driver 1 circuit, the (C801) Mode Door 2 Driver circuit, the (C807) Common Door Driver 2 circuit, the (C29) Mode Door 1 Driver circuit, and the (C61) Front Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between any of the circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short together. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) CHECK (C54) REAR BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C54) Rear Blend Door Driver circuit and the (C808) Common Door Driver 3 circuit, the (C32) Recirculation Door Driver circuit, the (C34) Common Door Driver 1 circuit, the (C801) Mode Door 2 Driver circuit, the (C807) Common Door Driver 2 circuit, the (C29) Mode Door 1 Driver circuit, and the (C61) Front Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between any of the circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short together. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C154) REAR COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C154) Rear Common Door Driver circuit and the (C808) Common Door Driver 3 circuit, the (C32) Recirculation Door Driver circuit, the (C34) Common Door Driver 1 circuit, the (C801) Mode Door 2 Driver circuit, the (C807) Common Door Driver 2 circuit, the (C29) Mode Door 1 Driver circuit, and the (C61) Front Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between any of the circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short together. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 6) .
6. 6) CHECK (C808) COMMON DOOR DRIVER 3 CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C808) Common Door Driver 3 circuit and the (C32) Recirculation Door Driver circuit, the (C34) Common Door Driver 1 circuit, the (C807) Common Door Driver 2 circuit, the (C29) Mode Door 1 Driver circuit, and the (C61) Front Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between any of the circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short together. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 7) .
7. 7) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C32) Recirculation Door Driver circuit, the (C34) Common Door Driver 1 circuit, the (C807) Common Door Driver 2 circuit, the (C29) Mode Door 1 Driver circuit, and the (C61) Front Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between any of the circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short together. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 8) .
8. 8) CHECK REAR MODE DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 9) . No Go to 10) .
9. 9) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT FOR A SHORT TO (C154) REAR COMMON DOOR DRIVER CIRCUIT Disconnect the Rear Mode Door Actuator harness connector. Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C53) Rear Mode Door Driver circuit for a short to the (C154) Rear Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear Mode Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
10. 10) CHECK REAR BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C54) Rear Blend Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 11) . No Go to 12) .
11. 11) CHECK (C54) REAR BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO (C154) REAR COMMON DOOR DRIVER CIRCUIT Disconnect the Rear Blend Door Actuator harness connector. Measure the resistance between the (C54) Rear Blend Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C54) Rear Blend Door Driver circuit for a short to the (C154) Rear Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
12. 12) CHECK MODE DOOR 2 (FLOOR TO DEFROST) ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C808) Common Door Driver 3 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 13) . No Go to 14) .
13. 13) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO (C808) COMMON DOOR DRIVER 3 CIRCUIT Disconnect the Mode Door 2 (Floor to Defrost) Actuator harness connector. Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C808) Common Door Driver 3 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C801) Mode Door 2 Driver circuit for a short to the (C808) Common Door Driver 3 circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Mode Door 2 (Floor to Defrost) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
14. 14) 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: B103A-REAR MODE DOOR CONTROL CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on any of the door driver circuits while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

If this DTC is active, refer to B104C-BLEND DOOR CONTROL CIRCUIT/PERFORMANCE (MTC) for the diagnostic test procedure. If this DTC is stored, refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 217

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C53) Rear Mode Door Driver circuit is shorted to ground.

Scheme 218

Scheme 219

Scheme 220

Scheme 221

Scheme 222

1. 1) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C53) Rear Mode Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C53) Rear Mode Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C154) REAR COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C154) Rear Common Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C154) Rear Common Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C61) Front Blend Door Driver circuit, the (C29) Mode Door 1 Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C32) Recirculation Door Driver circuit, the (C54) Rear Blend Door Driver circuit, and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C53) Rear Mode Door Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C53) Rear Mode Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) CHECK (C154) REAR COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C154) Rear Common Door Driver circuit and the (C61) Front Blend Door Driver circuit, the (C29) Mode Door 1 Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C32) Recirculation Door Driver circuit, and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C154) Rear Common Door Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C154) Rear Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK REAR MODE DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 6) . No Go to 7) .
6. 6) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT FOR A SHORT TO (C154) REAR COMMON DOOR DRIVER CIRCUIT Disconnect the Rear Mode Door Actuator harness connector. Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C53) Rear Mode Door Driver circuit for a short to the (C154) Rear Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear Mode Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
7. 7) RUN THE ACTUATOR DTC DETECTION 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 DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B103B-REAR MODE DOOR CONTROL CIRCUIT LOW? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 223

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C53) Rear Mode Door Driver circuit is shorted to voltage.

Scheme 224

1. 1) CHECK (C53) REAR MODE 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 (C53) Rear Mode Door Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C53) Rear Mode Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) RUN THE ACTUATOR DTC DETECTION TEST Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B103C-REAR MODE DOOR CONTROL CIRCUIT HIGH? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 225

1. When Monitored: With the ignition on.

1. Set Condition: If the Rear Mode Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B103D must be active for the results of this test to be valid. Do not perform this test if DTC B103D is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 226

Scheme 227

1. 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). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, then all other Control Circuit/Performance DTCs next. Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK REAR MODE DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Rear Mode Door Actuator harness connector. Measure the resistance of the (C53) Rear Mode Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C53) Rear Mode Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C154) REAR COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C154) Rear Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Rear Mode Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C154) Rear Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 228

1. When Monitored: With the ignition on.

1. Set Condition: If the Rear Mode Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B103D must be active for the results of this test to be valid. Do not perform this test if DTC B103D is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 229

Scheme 230

1. 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK REAR MODE DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C53) Rear Mode Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C53) REAR MODE DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Rear Mode Door Actuator harness connector. Measure the resistance of the (C53) Rear Mode Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C53) Rear Mode Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C154) REAR COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C154) Rear Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Rear Mode Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C154) Rear Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Mode Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Mode Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Mode Door exceeds the high range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Mode Door exceeds the high range limit.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on the (C29) Mode Door 1 Driver circuit or the (C807) Common Door Driver 2 circuit while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. The DTC must be active for the results of this test to be valid. Do not perform this test if the DTC is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 231

Scheme 232

Scheme 233

Scheme 234

Scheme 235

Scheme 236

Scheme 237

1. 1) CHECK (C29) MODE DOOR 1 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 (C29) Mode Door 1 Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C29) Mode Door 1 Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C807) Common Door Driver 2 circuit. Is the voltage above 0.2 volts? Yes Repair the (C807) Common Door Driver 2 circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C29) Mode Door 1 Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C29) Mode Door 1 Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) CHECK (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C807) Common Door Driver 2 circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C807) Common Door Driver 2 circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C54) Rear Blend Door Driver circuit, the (C808) Common Door Driver 3 circuit, the (C32) Recirculation Door Driver circuit, the (C34) Common Door 1 Driver circuit, the (C154) Rear Common Door Driver circuit, the (C53) Rear Mode Door Driver circuit, the (C801) Mode Door 2 Driver circuit, and the (C61) Front Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C29) Mode Door 1 Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C29) Mode Door 1 Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 6) .
6. 6) CHECK (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C807) Common Door Driver 2 circuit and the (C54) Rear Blend Door Driver circuit, the (C808) Common Door Driver 3 circuit, the (C32) Recirculation Door Driver circuit, the (C34) Common Door Driver 1 circuit, the (C154) Rear Common Door Driver circuit, the (C53) Rear Mode Door Driver circuit, the (C801) Mode Door 2 Driver circuit, and the (C61) Front Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C807) Common Door Driver 2 circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 100 ohms for a short to the (C807) Common Door Driver 2 circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 7) .
7. 7) CHECK MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C807) Common Door Driver 2 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 8) . No Go to 9) .
8. 8) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO (C807) COMMON DOOR DRIVER 2 CIRCUIT Disconnect the Mode Door 1 (Floor to Panel) Actuator harness connector. Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C807) Common Door Driver 2 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C29) Mode Door 1 Driver circuit for a short to the (C807) Common Door Driver 2 circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
9. 9) 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: B1040-PANEL MODE DOOR 1 CONTROL CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on any of the door driver circuits while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

If this DTC is active, refer to B104C-BLEND DOOR CONTROL CIRCUIT/PERFORMANCE (MTC) for the diagnostic test procedure. If this DTC is stored, refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C29) Mode Door 1 Driver circuit is shorted to ground.

Scheme 238

Scheme 239

Scheme 240

1. 1) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C29) Mode Door 1 Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C29) Mode Door 1 Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C61) Front Blend Door Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C32) Recirculation Door Driver circuit, and, if equipped, the (C53) Rear Mode Door Driver circuit, the (C154) Rear Common Door Driver circuit, and the (C54) Rear Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C29) Mode Door 1 Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C29) Mode Door 1 Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 4) . No Go to 5) .
4. 4) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Mode Door 1 (Floor to Panel) Actuator harness connector. Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C29) Mode Door 1 Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) RUN THE ACTUATOR DTC DETECTION 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 DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1041-PANEL MODE DOOR 1 CONTROL CIRCUIT LOW? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 241

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C29) Mode Door 1 Driver circuit is shorted to voltage.

Scheme 242

1. 1) CHECK (C29) MODE DOOR 1 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 (C29) Mode Door 1 Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C29) Mode Door 1 Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) RUN THE ACTUATOR DTC DETECTION TEST Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1042-PANEL MODE DOOR 1 CONTROL CIRCUIT HIGH? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 243

1. When Monitored: With the ignition on.

1. Set Condition: If Mode Door 1 (Floor to Panel) Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1043 must be active for the results of this test to be valid. Do not perform this test if DTC B1043 is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 244

Scheme 245

1. 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). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, then all other Control Circuit/Performance DTCs next. Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C807) Common Door Driver 2 circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR AN OPEN Disconnect the Mode Door 1 (Floor to Panel) Actuator harness connector. Measure the resistance of the (C29) Mode Door 1 Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 1 (Floor to Panel) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C29) Mode Door 1 Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C807) COMMON DOOR DRIVER 2 CIRCUIT FOR AN OPEN Measure the resistance of the (C807) Common Door Driver 2 circuit between the A/C Heater Control C1 harness connector and the Mode Door 1 (Floor to Panel) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C807) Common Door Driver 2 circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 246

1. When Monitored: With the ignition on.

1. Set Condition: If the Mode Door 1 (Floor to Panel) Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1043 must be active for the results of this test to be valid. Do not perform this test if DTC B1043 is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 247

Scheme 248

1. 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR AN OPEN Disconnect the Mode Door 1 (Floor to Panel) Actuator harness connector. Measure the resistance of the (C29) Mode Door 1 Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 1 (Floor to Panel) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C29) Mode Door 1 Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C34) FRONT COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Front Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 1 (Floor to Panel) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C34) Front Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 1 (Floor to Panel) Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 1 (Floor to Panel) Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 1 (Floor to Panel) Door exceeds the high range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 1 (Floor to Panel) Door exceeds the high range limit.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on the (C53) Rear Mode Door Driver circuit, the (C54) Rear Blend Door Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C154) Rear Common Door Driver circuit, or the (C808) Common Door Driver 3 circuit while attempting to drive the Rear Mode Door Actuator, the Rear Blend Door Actuator, or the Mode Door 2 (Floor to Panel) Actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored, it will stay in memory for 100 ignition cycles.

Note. The DTC must be active for the results of this test to be valid. Do not perform this test if the DTC is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on any of the door driver circuits while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

If this DTC is active, refer to B104C-BLEND DOOR CONTROL CIRCUIT/PERFORMANCE (MTC) for the diagnostic test procedure. If this DTC is stored, refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C801) Mode Door 2 Driver circuit is shorted to ground.

Scheme 249

Scheme 250

Scheme 251

1. 1) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C801) Mode Door 2 Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C801) Mode Door 2 Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C32) Recirculation Door Driver circuit, the (C29) Mode Door 1 Driver circuit, the (C61) Front Blend Door Driver circuit, and, if equipped, the (C53) Rear Mode Door Driver circuit, the (C154) Rear Common Door Driver circuit, and the (C54) Rear Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C801) Mode Door 2 Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C801) Mode Door 2 Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK MODE DOOR 2 (FLOOR TO DEFROST) ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 4) . No Go to 5) .
4. 4) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Mode Door 2 (Floor to Defrost) Actuator harness connector. Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C801) Mode Door 2 Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Mode Door 2 (Floor to Defrost) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) RUN THE ACTUATOR DTC DETECTION 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 DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1047-FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT LOW? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 252

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C801) Mode Door 2 Driver circuit is shorted to voltage.

Scheme 253

1. 1) CHECK (C801) MODE DOOR 2 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 (C801) Mode Door 2 Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C801) Mode Door 2 Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) RUN THE ACTUATOR DTC DETECTION TEST Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1048-FLOOR/DEFROST MODE DOOR CONTROL CIRCUIT HIGH? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No, And No 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-285334-S04155882182008052100000) .

Scheme 254

1. When Monitored: With the ignition on.

1. Set Condition: If the Mode Door 2 (Floor to Defrost) Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1049 must be active for the results of this test to be valid. Do not perform this test if DTC B1049 is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 255

Scheme 256

1. 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). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, then all other Control Circuit/Performance DTCs next. Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK MODE DOOR 2 (FLOOR TO DEFROST) ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C808) Common Door Driver 3 circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR AN OPEN Disconnect the Mode Door 2 (Floor to Defrost) Actuator harness connector. Measure the resistance of the (C801) Mode Door 2 Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 2 (Floor to Defrost) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C801) Mode Door 2 Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C808) COMMON DOOR DRIVER 3 CIRCUIT FOR AN OPEN Measure the resistance of the (C808) Common Door Driver 3 circuit between the A/C Heater Control C1 harness connector and the Mode Door 2 (Floor to Defrost) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Mode Door 2 (Floor to Defrost) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C808) Common Door Driver 3 circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 257

1. When Monitored: With the ignition on.

1. Set Condition: If the Mode Door 2 (Floor to Defrost) Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1049 must be active for the results of this test to be valid. Do not perform this test if DTC B1049 is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 258

Scheme 259

1. 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK MODE DOOR 2 (FLOOR TO DEFROST) ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR AN OPEN Disconnect the Mode Door 2 (Floor to Defrost) Actuator harness connector. Measure the resistance of the (C801) Mode Door 2 Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 2 (Floor to Defrost) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C801) Mode Door 2 Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C34) FRONT COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Front Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 2 (Floor to Defrost) Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Mode Door 2 (Floor to Defrost) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C34) Front Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 2 (Floor to Defrost) Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 2 (Floor to Defrost) Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 2 (Floor to Defrost) Door exceeds the high range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Mode 2 (Floor to Defrost) Door exceeds the high range limit.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on the (C61) Front Blend Door Driver circuit, the (C32) Recirculation Door Driver circuit, or the (C34) Common Door Driver 1 circuit while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. The DTC must be active for the results of this test to be valid. Do not perform this test if the DTC is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 260

Scheme 261

Scheme 262

Scheme 263

Scheme 264

Scheme 265

Scheme 266

Scheme 267

Scheme 268

Scheme 269

Scheme 270

1. 1) CHECK (C61) FRONT BLEND 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 (C61) Front Blend Door Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C61) Front Blend Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C32) Recirculation Door Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C32) Recirculation Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK (C34) COMMON DOOR DRIVER 1 CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C34) Common Door Driver 1 circuit. Is the voltage above 0.2 volts? Yes Repair the (C34) Common Door Driver 1 circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C61) Front Blend Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C61) Front Blend Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 5) .
5. 5) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C32) Recirculation Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C32) Recirculation Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 6) .
6. 6) CHECK (C34) COMMON DOOR DRIVER 1 CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C34) Common Door Driver 1 circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C34) Common Door Driver 1 circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 7) .
7. 7) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C54) Rear Blend Door Driver circuit, the (C808) Common Door Driver 3 circuit, the (C32) Recirculation Door Driver circuit, the (C154) Rear Common Door Driver circuit, the (C53) Rear Mode Door Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C807) Common Door Driver 2 circuit, and the (C29) Mode Door 1 Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C61) Front Blend Door Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C61) Front Blend Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 8) .
8. 8) CHECK (C32) RECIRCULATION DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C54) Rear Blend Door Driver circuit, the (C808) Common Door 3 Driver circuit, the (C154) Rear Common Door Driver circuit, the (C53) Rear Mode Door Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C807) Common Door Driver 2 circuit, and the (C29) Mode Door 1 Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C32) Recirculation Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C32) Recirculation Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 9) .
9. 9) CHECK (C34) COMMON DOOR DRIVER 1 CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C34) Common Door Driver 1 circuit and the (C54) Rear Blend Door Driver circuit, the (C808) Common Door Driver 3 circuit, the (C154) Rear Common Door Driver circuit, the (C53) Rear Mode Door Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C807) Common Door Driver 2 circuit, and the (C29) Mode Door 1 Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C34) Common Door Driver 1 circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 100 ohms for a short to the (C34) Common Door Driver 1 circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 10) .
10. 10) CHECK FRONT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Common Door Driver 1 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 11) . No Go to 12) .
11. 11) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO (C34) COMMON DOOR DRIVER 1 CIRCUIT Disconnect the Front Blend Door Actuator harness connector. Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Common Door Driver 1 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C61) Front Blend Door Driver circuit for a short to the (C34) Common Door Driver 1 circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Front Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
12. 12) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Common Door Driver 1 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 13) . No Go to 14) .
13. 13) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO (C34) COMMON DOOR DRIVER 1 CIRCUIT Disconnect the Recirculation Door Actuator harness connector. Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Common Door Driver 1 circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C32) Recirculation Door Driver circuit for a short to the (C34) Common Door Driver 1 circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Recirculation Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
14. 14) 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: B104C-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-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on any of the door driver circuits while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored, it will stay in memory for 100 ignition cycles.

Note. The DTC must be active for the results of this test to be valid. Do not perform this test if the DTC is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C61) Front Blend Door Driver circuit is shorted to ground.

Scheme 271

Scheme 272

Scheme 273

1. 1) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C61) Front Blend Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C61) Front Blend Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C29) Mode Door 1 Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C32) Recirculation Door Driver circuit, and, if equipped, the (C53) Rear Mode Door Driver circuit, the (C154) Rear Common Door Driver circuit, and the (C54) Rear Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C61) Front Blend Door Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C61) Front Blend Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK FRONT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 4) . No Go to 5) .
4. 4) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Front Blend Door Actuator harness connector. Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C61) Front Blend Door Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Front Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) RUN THE ACTUATOR DTC DETECTION 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 DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B104D-BLEND DOOR CONTROL CIRCUIT LOW? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 274

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C61) Front Blend Door Driver circuit is shorted to voltage.

Scheme 275

1. 1) CHECK (C61) FRONT BLEND 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 (C61) Front Blend Door Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C61) Front Blend Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) RUN THE ACTUATOR DTC DETECTION TEST Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B104E-BLEND DOOR CONTROL CIRCUIT HIGH? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 276

1. When Monitored: With the ignition on.

1. Set Condition: If the Front Blend Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B104F must be active for the results of this test to be valid. Do not perform this test if DTC B104F is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 277

Scheme 278

1. 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). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, then all other Control Circuit/Performance DTCs next. Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK FRONT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Common Door Driver 1 circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Front Blend Door Actuator harness connector. Measure the resistance of the (C61) Front Blend Door Driver circuit between the A/C Heater Control C1 harness connector and the Front Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C61) Front Blend Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C34) COMMON DOOR DRIVER 1 CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Common Door Driver 1 circuit between the A/C Heater Control C1 harness connector and the Front Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Front Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C34) Common Door Driver 1 circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 279

1. When Monitored: With the ignition on.

1. Set Condition: If Front Blend Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B104F must be active for the results of this test to be valid. Do not perform this test if DTC B104F is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 280

Scheme 281

1. 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK FRONT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Front Blend Door Actuator harness connector. Measure the resistance of the (C61) Front Blend Door Driver circuit between the A/C Heater Control C1 harness connector and the Front Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C61) Front Blend Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C34) FRONT COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Front Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Front Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Front Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C34) Front Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Front Blend Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Front Blend Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Front Blend Door exceeds the high range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Front Blend Door exceeds the high range limit.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on the (C53) Rear Mode Door Driver circuit, the (C54) Rear Blend Door Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C154) Rear Common Door Driver circuit, or the (C808) Common Door Driver 3 circuit while attempting to drive the Rear Mode Door Actuator, the Rear Blend Door Actuator, or the Mode Door 2 (Floor to Panel) Actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored, it will stay in memory for 100 ignition cycles.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on any of the door driver circuits while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

If this DTC is active, refer to B104C-BLEND DOOR CONTROL CIRCUIT/PERFORMANCE (MTC) for the diagnostic test procedure. If this DTC is stored, refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C54) Rear Blend Door Driver circuit is shorted to ground.

Scheme 282

Scheme 283

Scheme 284

1. 1) CHECK (C54) REAR BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C54) Rear Blend Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C54) Rear Blend Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C54) REAR BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between (C54) Rear Blend Door Driver circuit and the (C61) Front Blend Door Driver circuit, the (C29) Mode Door 1 Driver circuit, the (C801) Mode Door 2 Driver circuit, the (C32) Recirculation Door Driver circuit, the (C53) Rear Mode Door Driver circuit, and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C54) Rear Blend Door Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C54) Rear Blend Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK REAR BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C54) Rear Blend Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 4) . No Go to 5) .
4. 4) CHECK (C54) REAR BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO (C154) REAR COMMON DOOR DRIVER CIRCUIT Disconnect the Rear Blend Door Actuator harness connector. Measure the resistance between the (C54) Rear Blend Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C54) Rear Blend Door Driver circuit for a short to the (C154) Rear Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) RUN THE ACTUATOR DTC DETECTION 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 DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1053-REAR BLEND DOOR CONTROL CIRCUIT LOW? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C54) Rear Blend Door Driver circuit is shorted to voltage.

Scheme 285

1. 1) CHECK (C54) REAR BLEND 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 (C54) Rear Blend Door Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C54) Rear Blend Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) RUN THE ACTUATOR DTC DETECTION TEST Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1054-REAR BLEND DOOR CONTROL CIRCUIT HIGH? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 286

1. When Monitored: With the ignition on.

1. Set Condition: If the Rear Blend Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1055 must be active for the results of this test to be valid. Do not perform this test if DTC B1055 is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 287

Scheme 288

1. 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). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, then all other Control Circuit/Performance DTCs next. Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK REAR BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C54) Rear Blend Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C54) REAR BLEND DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Rear Blend Door Actuator harness connector. Measure the resistance of the (C54) Rear Blend Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C54) Rear Blend Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C154) REAR COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C154) Rear Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Rear Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C154) Rear Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 289

1. When Monitored: With the ignition on.

1. Set Condition: If the Rear Blend Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B1055 must be active for the results of this test to be valid. Do not perform this test if DTC B1055 is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 290

Scheme 291

1. 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK REAR BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C54) Rear Blend Door Driver circuit and the (C154) Rear Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C54) REAR BLEND DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Rear Blend Door Actuator harness connector. Measure the resistance of the (C54) Rear Blend Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C54) Rear Blend Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C154) REAR COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C154) Rear Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Rear Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Rear Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C154) Rear Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Blend Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Blend Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Blend Door exceeds the high range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Rear Blend Door exceeds the high range limit.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on the (C61) Front Blend Door Driver circuit, the (C32) Recirculation Door Driver circuit, or the (C34) Common Door Driver 1 circuit while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. The DTC must be active for the results of this test to be valid. Do not perform this test if the DTC is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short on any of the door driver circuits while attempting to drive this actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

If this DTC is active, refer to B104C-BLEND DOOR CONTROL CIRCUIT/PERFORMANCE (MTC) for the diagnostic test procedure. If this DTC is stored, refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C32) Recirculation Door Driver circuit is shorted to ground.

Scheme 292

Scheme 293

Scheme 294

1. 1) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C32) Recirculation Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C32) Recirculation Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C29) Mode Door 1 Driver circuit, the (C61) Front Blend Door Driver circuit, the (C801) Mode Door 2 Driver circuit, and, if equipped, the (C53) Rear Mode Door Driver circuit, the (C154) Rear Common Door Driver circuit, and the (C54) Rear Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms between the (C32) Recirculation Door Driver circuit and any of the other door driver circuits? Yes Repair the circuit(s) with a resistance below 100 ohms for a short to the (C32) Recirculation Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 4) . No Go to 5) .
4. 4) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Recirculation Door Actuator harness connector. Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 100 ohms? Yes Repair the (C32) Recirculation Door Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Recirculation Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) RUN THE ACTUATOR DTC DETECTION 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 DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1059-RECIRCULATION DOOR CONTROL CIRCUIT LOW? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 295

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C32) Recirculation Door Driver circuit is shorted to voltage.

Scheme 296

1. 1) 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. Is the voltage above 0.2 volts? Yes Repair the (C32) Recirculation Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) RUN THE ACTUATOR DTC DETECTION TEST Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B105A-RECIRCULATION DOOR CONTROL CIRCUIT HIGH? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 297

1. When Monitored: With the ignition on.

1. Set Condition: If the Recirculation Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B105B must be active for the results of this test to be valid. Do not perform this test if DTC B105B is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 298

Scheme 299

1. 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). If present, diagnose and repair all Rear Blend and Rear Mode Door Control Circuit/Performance DTCs first, then all other Control Circuit/Performance DTCs next. Refer to «DIAGNOSTIC CODE INDEX»(ref-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Common Door Driver 1 circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Recirculation Door Actuator harness connector. Measure the resistance of the (C32) Recirculation Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C34) COMMON DOOR DRIVER 1 CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Common Door Driver 1 circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator 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-285334-S04155882182008052100000) . No Repair the (C34) Common Door Driver 1 circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 300

1. When Monitored: With the ignition on.

1. Set Condition: If Recirculation Door Actuator's electrical circuit is open. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B105B must be active for the results of this test to be valid. Do not perform this test if DTC B105B is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 301

Scheme 302

1. 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No Go to 2) .
2. 2) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance above 70 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-285334-S04155882182008052100000) .
3. 3) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN Disconnect the Recirculation Door Actuator harness connector. Measure the resistance of the (C32) Recirculation Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go to 4) . No Repair the (C32) Recirculation Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C34) FRONT COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C34) Front Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator 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-285334-S04155882182008052100000) . No Repair the (C34) Front Common Door Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Recirculation Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Recirculation Door is less than the low range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Recirculation Door exceeds the high range limit.

1. When Monitored: During actuator calibration.

1. Set Condition: If the total span of the Recirculation Door exceeds the high range limit.

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C34) Front Common Door Driver circuit is shorted to ground.

Scheme 303

Scheme 304

1. 1) CHECK (C34) FRONT COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C34) Front Common Door Driver circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C34) Front Common Door Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Vehicles With Rear HVAC Go to 2) . No, Vehicles Without Rear HVAC Go to 3) .
2. 2) CHECK (C34) FRONT COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUITS Measure the resistance between the (C34) Front Common Door Driver 1 circuit and the (C53) Rear Mode Door Driver circuit, the (C154) Rear Common Door Driver circuit, and the (C54) Rear Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms between the (C34) Front Common Door Driver circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK FRONT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 4) . No Go to 5) .
4. 4) CHECK (C61) FRONT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Front Blend Door Actuator harness connector. Measure the resistance between the (C61) Front Blend Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C61) Front Blend Door Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Front Blend Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) CHECK MODE DOOR 1 (FLOOR TO PANEL) ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 6) . No Go to 7) .
6. 6) CHECK (C29) MODE DOOR 1 DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Mode Door 1 (Floor to Panel) Actuator harness connector. Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C29) Mode Door 1 Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Mode Door 1 (Floor to Panel) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
7. 7) CHECK MODE DOOR 2 (FLOOR TO DEFROST) ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 8) . No Go to 9) .
8. 8) CHECK (C801) MODE DOOR 2 DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Mode Door 2 (Floor to Defrost) Actuator harness connector. Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C801) Mode Door 2 Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Mode Door 2 (Floor to Defrost) Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
9. 9) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 30 ohms? Yes Go to 10) . No Go to 11) .
10. 10) CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO (C34) FRONT COMMON DOOR DRIVER CIRCUIT Disconnect the Recirculation Door Actuator harness connector. Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Front Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C32) Recirculation Door Driver circuit for a short to the (C34) Front Common Door Driver circuit. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Recirculation Door Actuator in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
11. 11) RUN THE ACTUATOR DTC DETECTION TEST Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B105F-CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT LOW? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table for a complete list of all HVAC related symptoms. No, And No 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-285334-S04155882182008052100000) .

Scheme 305

1. When Monitored: When the Actuator DTC Detection Test is executed.

1. Set Condition: If the (C34) Front Common Door Driver circuit is shorted to voltage.

Scheme 306

1. 1) CHECK (C34) FRONT COMMON 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 (C34) Front Common Door Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C34) Front Common Door Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) RUN THE ACTUATOR DTC DETECTION TEST Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs. Does the scan tool only display: B1060-CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT HIGH? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No, Other DTC(s) Displayed Diagnose and repair the other 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-285340-S09845208012008052100000) table 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-285334-S04155882182008052100000) .

Scheme 307

1. When Monitored: When rear blower speed is set to Low, M1, or High with the ignition on.

1. Set Condition: If the ATC detects an excessive draw on any of the rear blower outputs.

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.

Scheme 308

Scheme 309

Scheme 310

Scheme 311

1. 1) CHECK (Z928) GROUND CIRCUIT FOR HIGH RESISTANCE Turn the ignition off. Disconnect the A/C Heater Control C3 harness connector. Measure the resistance of the (Z928) Ground circuit between ground and the A/C Heater Control C3 harness connector. Is resistance below 5.0 ohms? Yes Go to 2) . No Repair the (Z928) Ground circuit for high resistance. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
2. 2) CHECK (C151) REAR BLOWER LOW SPEED CIRCUIT, (C152) REAR BLOWER MEDIUM SPEED CIRCUIT, & (153) REAR BLOWER HIGH SPEED CIRCUIT FOR SHORT TO VOLTAGE Disconnect the Rear Blower Motor harness connector. Turn the ignition on. Measure the voltage of the (C151) Rear Blower Low Speed circuit in the A/C Heater Control C3 harness connector. Measure the voltage of the (C152) Rear Blower Medium Speed circuit in the A/C Heater Control C3 harness connector. Measure the voltage of the (C153) Rear Blower High Speed circuit in the A/C Heater Control C3 harness connector. Is voltage above 0.2 volts on any of the circuits. Yes Repair the circuit(s) with voltage above 0.2 volts for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 3) .
3. 3) CHECK FOR BLOCKAGE PREVENTING REAR BLOWER MOTOR OPERATION Turn the ignition off. Remove the Rear Blower Motor from the Rear A/C Heater Housing in accordance with the Service Information. Look for anything on the Rear Blower Motor and in the Rear A/C Heater Housing that is physically preventing rear blower operation. Is anything physically preventing rear blower operation? Yes Repair as necessary. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 4) .
4. 4) CHECK REAR BLOWER MOTOR FOR CAUSE OF HIGH AMPERAGE DRAW Reinstall the Rear Blower Motor in the Rear A/C Heater Housing in accordance with the Service Information. Reconnect the Rear Blower Motor harness connector. Disconnect the Rear Blower Motor Resistor Block harness connector. Connect a 20 amp fused jumper wire between ground and the (C153) Rear Blower High Speed circuit in the Rear Blower Motor Harness connector. Start the engine. The rear blower motor should run with out blowing the fuse. Does the rear blower motor run with out blowing the fuse? Yes Go to 5) . No Replace the Rear Blower Motor in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
5. 5) CHECK REAR BLOWER MOTOR RESISTOR BLOCK FOR CAUSE OF HIGH AMPERAGE DRAW Turn the ignition off. Remove the 20 amp fused jumper wire from the (C153) Rear Blower High Speed circuit in the Rear Blower Motor Harness connector. Reconnect the Rear Blower Motor Resistor Block harness connector. Connect a 10 amp fused jumper wire between ground and the (C152) Rear Blower Medium Speed circuit in the Rear Blower Motor Resistor Block harness connector. Start the engine. The rear blower motor should run with out blowing the fuse. Turn the ignition off. Remove the 10 amp fused jumper wire from the (C152) Rear Blower Medium Speed circuit in the Rear Blower Motor Resistor Block harness connector. Connect a 5 amp fused jumper wire between ground and the (C151) Rear Blower Low Speed circuit in the Rear Blower Motor Resistor Block harness connector. Start the engine. The rear blower motor should run with out blowing the fuse. Does the rear blower motor run with out blowing either of the fuses? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the Rear Blower Motor Resistor Block in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: When the Cooldown Test is executed.

1. Set Condition: If the A/C system is unable to lower the evaporator temperature 11.11°C (20°F) within one minute.

1. When Monitored: When Auxiliary Coolant Pump operation is requested.

1. Set Condition: If the (C43) Auxiliary Coolant Pump Driver circuit is shorted to ground. This DTC has a maturing time of 10 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B107E must be active for the results of this test to be valid. Do not perform this test if DTC B107E is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

Scheme 312

Scheme 313

1. 1) CHECK FOR DTC B107E-AUXILIARY COOLANT PUMP CONTROL CIRCUIT LOW WITH AUXILIARY COOLANT PUMP DISCONNECTED Turn the ignition on. Set the blend control to full cold. With the scan tool, erase HVAC DTCs. Turn the ignition off. Disconnect the Auxiliary Coolant Pump harness connector. Turn the ignition on. With the scan tool, select the following: Actuators, Auxiliary Coolant Pump, Start, and Constant On. Allow the actuator to run for approximately one minute. With the scan tool, read HVAC DTCs. Does the scan tool display: B1080-AUXILIARY COOLANT PUMP CONTROL CIRCUIT OPEN? Yes Replace the Auxiliary Coolant Pump in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C43) Auxiliary Coolant Pump Driver circuit between ground and the Auxiliary Coolant Pump harness connector. Is the resistance below 10K ohms? Yes Repair the (C43) Auxiliary Coolant Pump Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 314

1. When Monitored: When Auxiliary Coolant Pump operation is requested.

1. Set Condition: If the (C43) Auxiliary Coolant Pump Driver circuit is shorted to ground. This DTC has a maturing time of 10 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Note. DTC B107E must be active for the results of this test to be valid. Do not perform this test if DTC B107E is stored. Refer to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

Scheme 315

Scheme 316

1. 1) CHECK FOR DTC B107E-AUXILIARY COOLANT PUMP CONTROL CIRCUIT LOW WITH AUXILIARY COOLANT PUMP DISCONNECTED Set the blend control to the full cold position. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off. Disconnect the Auxiliary Coolant Pump harness connector. Turn the ignition on. With the scan tool, select the following: Actuators, Auxiliary Coolant Pump, Start, and Constant On. Allow the actuator to run for approximately one minute. With the scan tool, read HVAC DTCs. Does the scan tool display: B1080-AUXILIARY COOLANT PUMP CONTROL CIRCUIT OPEN? Yes Replace the Auxiliary Coolant Pump in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C43) Auxiliary Coolant Pump Driver circuit between ground and the Auxiliary Coolant Pump harness connector. Is the resistance below 10K ohms? Yes Repair the (C43) Auxiliary Coolant Pump Driver circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 317

1. When Monitored: When Auxiliary Coolant Pump operation is requested.

1. Set Condition: If the (C43) Auxiliary Coolant Pump Driver circuit is open or shorted to voltage. This DTC has a maturing time of 10 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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.

Scheme 318

Scheme 319

Scheme 320

Scheme 321

1. 1) CHECK (C43) AUXILIARY COOLANT PUMP 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 (C43) Auxiliary Coolant Pump Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C43) Auxiliary Coolant Pump Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT OPERATION Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Set the blend control to full cold. With the scan tool, erase HVAC DTCs. Turn the ignition off. Disconnect the Auxiliary Coolant Pump harness connector. Using a 12-volt test light connected to ground, back probe the (C43) Auxiliary Coolant Pump Driver circuit. Turn the ignition on. With the scan tool, select the following: Actuators, Auxiliary Coolant Pump, Start, and Constant On. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to 3) . No Go to 4) .
3. 3) CHECK (Z931) GROUND CIRCUIT FOR AN OPEN Turn the ignition off. Measure the resistance of the (Z931) Ground circuit between ground and the Auxiliary Coolant Pump harness connector. Is the resistance below 5.0 ohms? Yes Replace the Auxiliary Coolant Pump in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (Z931) Ground circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C43) Auxiliary Coolant Pump Driver circuit between the A/C Heater Control C1 harness connector and the Auxiliary Coolant Pump harness connector. Is the resistance below 5.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C43) Auxiliary Coolant Pump Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 322

1. When Monitored: When Auxiliary Coolant Pump operation is requested.

1. Set Condition: If the (C43) Auxiliary Coolant Pump Driver circuit is open or shorted to voltage. This DTC has a maturing time of 10 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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 (MTC) for stored DTC test procedures.

Scheme 323

Scheme 324

Scheme 325

Scheme 326

1. 1) CHECK (C43) AUXILIARY COOLANT PUMP 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 (C43) Auxiliary Coolant Pump Driver circuit. Is the voltage above 0.2 volts? Yes Repair the (C43) Auxiliary Coolant Pump Driver circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Go to 2) .
2. 2) CHECK (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT OPERATION Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. Set the blend control to the full cold position. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off. Disconnect the Auxiliary Coolant Pump harness connector. Using a 12-volt test light connected to ground, back probe the (C43) Auxiliary Coolant Pump Driver circuit. Turn the ignition on. With the scan tool, select the following: Actuators, Auxiliary Coolant Pump, Start, and Constant On. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes Go to 3) . No Go to 4) .
3. 3) CHECK (Z931) GROUND CIRCUIT FOR AN OPEN Turn the ignition off. Measure the resistance of the (Z931) Ground circuit between ground and the Auxiliary Coolant Pump harness connector. Is the resistance below 5.0 ohms? Yes Replace the Auxiliary Coolant Pump in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (Z931) Ground circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (C43) AUXILIARY COOLANT PUMP DRIVER CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C43) Auxiliary Coolant Pump Driver circuit between the A/C Heater Control C1 harness connector and the Auxiliary Coolant Pump harness connector. Is the resistance below 5.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (C43) Auxiliary Coolant Pump Driver circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 327

1. When Monitored: With the ignition in run.

1. Set Condition: This DTC will set if any of the following occur: If the total combined Infrared (IR) Sensor signal on and off time is approx. 88.79 ms or 3 116.01 ms. If the IR Sensor duty cycle is approx. or equal to 9.5%. If the IR Sensor duty cycle is in the range of 65.5% up to and including 65.8%. If the IR Sensor duty cycle is in the range of 71.8% up to and including 72%. If the IR Sensor duty cycle is in the range of 78% up to and including 78.3%. If the IR Sensor duty cycle is in the range of 78.3% up to and including 84.3% (this indicates and IR EEPROM fatal error). If the IR Sensor duty cycle is in the range of 84.3% up to and including 100%.

Note. DTC B108E must be active for the results of this test to be valid. Do not perform this test if DTC B108E is stored. Refer to *HVAC SYSTEM TEST (ATC) for stored DTC test procedures.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control either fails to receive Engine Coolant Temperature Sensor data, Ambient Temperature Sensor data, or Infrared Sensor data, or if the data from any of these sensors is out of range. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a pulse count error while attempting to drive a door actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored, it will stay in memory for 100 ignition cycles.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a pulse count error while attempting to drive a door actuator. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored, it will stay in memory for 100 ignition cycles.

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: If the Ambient Light Sensor input is out of range toward the high voltage threshold.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control has an internal fault. This DTC has a maturing time of 5 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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 either *HVAC SYSTEM TEST (ATC) or to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: With the ignition on.

1. Set Condition: If the Rear Washer mode switch is stuck in a pushed position for more than two minutes. This DTC has a maturing time of two minutes and a de-maturing time of two seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

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 either *HVAC SYSTEM TEST (ATC) or to *HVAC SYSTEM TEST (MTC) for stored DTC test procedures.

1. When Monitored: Continuously

1. Set Condition: If the CAN B Bus (+) or CAN B Bus (-) circuit is open, shorted to voltage, or shorted to ground.

Scheme 328

Scheme 329

1. 1) VERIFY DTC U0019-CAN B BUS IS ACTIVE Turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display active: U0019-CAN B BUS? Yes Go to 2) . No If the DTC is stored, 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. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
2. 2) CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE (FCM) With the scan tool, read Front Control Module (FCM) DTCs Does the scan tool display any active CAN B BUS related DTCs? Yes Diagnose and repair the DTC(s). Refer to «DIAGNOSIS AND TESTING»(ref-285334-S40494593062008052100000) . No Go to 3) .
3. 3) CHECK (D55) CAN B 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 Front Control Module (FCM) C1 harness connector. Measure the resistance of the (D55) CAN B Bus (+) circuit between the Front Control Module C1 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 (D55) CAN B Bus (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN Measure the resistance of the (D54) CAN B Bus (-) circuit between the Front Control Module C1 connector and the A/C Heater Control C1 harness connector. Is the resistance below 2.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (D54) CAN B Bus (-) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

Scheme 330

1. When Monitored: Continuously

1. Set Condition: If the CAN B Bus (+) or CAN B Bus (-) circuit is open, shorted to voltage, or shorted to ground.

Scheme 331

Scheme 332

1. 1) VERIFY DTC U0019-CAN B BUS IS ACTIVE Turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display active: U0019-CAN B BUS? Yes Go to 2) . No If the DTC is stored, 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. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
2. 2) CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE (FCM) With the scan tool, read Front Control Module (FCM) DTCs Does the scan tool display any active CAN B BUS related DTCs? Yes Diagnose and repair the DTC(s). Refer to «DIAGNOSIS AND TESTING»(ref-285334-S40494593062008052100000) . No Go to 3) .
3. 3) CHECK (D55) CAN B 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 Front Control Module (FCM) C1 harness connector. Measure the resistance of the (D55) CAN B Bus (+) circuit between the Front Control Module C1 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 (D55) CAN B Bus (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .
4. 4) CHECK (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN Measure the resistance of the (D54) CAN B Bus (-) circuit between the Front Control Module C1 connector and the A/C Heater Control C1 harness connector. Is the resistance below 2.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) . No Repair the (D54) CAN B Bus (-) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-285334-S04155882182008052100000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Front Control Module (FCM). This DTC has a maturing time of 30 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Cluster (CCN). This DTC has a maturing time of 30 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Compass Temperature Module (EOM). This DTC has a maturing time of 30 seconds and a de-maturing time of 10 seconds. If the DTC's status changes from active to stored it will stay in memory for 100 ignition cycles.

Refer to DIAGNOSIS AND TESTING for the diagnostic test procedure.

1. When Monitored: When the Cooldown Test is executed.

1. Set Condition: If either the front blower speed was not set to high speed prior to starting the Cooldown Test or the front blower speed was changed from high speed to another setting after starting the Cooldown test.

1. When Monitored: When the Cooldown Test is executed.

1. Set Condition: If the A/C system is unable to lower the evaporator temperature 11.11°C (20°F) within one minute.

1. When Monitored: When the Cooldown Test is executed.

1. Set Condition: If a fault occurred with the Evaporator Temperature Sensor/sensor circuits.