HVAC Systems - Electrical Diagnostics: Other Dodge Magnum I

Monitor Conditions

1. When Monitored: Following the Start Up Wait Time after ignition on.

Set Conditions

1. Set Condition: If the mode pot fails the internal self test.

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 HVAC System Test (MTC) for stored DTC test procedures.

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the mode pot fails the internal self test.

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.

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the temp pot fails the internal self test.

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.

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the temp pot fails the internal self test.

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.

1. When Monitored: When driving the Mode Door Actuator.

1. Set Condition: If the A/C Heater Control fails to detect commutator pulses.

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) RUN THE ACTUATOR CALIBRATION FUNCTION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Actuate the Actuator Calibration function by performing the following: Turn the ignition on. Turn the blower control to off. Press the EBL mode switch down for 5 seconds and then release it. Wait approximately 90 seconds for the calibration process to run to completion before proceeding. Turn the ignition off, wait 10 seconds, and turn the ignition on. Actuate the Display DTC function by performing the following: Turn the blower control on. Press the A/C mode switch down, turn the blower control to off, wait 3 seconds and then release the A/C mode switch. NOTE: The A/C status indicator displays active DTCs when the EBL status indictor is not illuminated and stored DTCs when the EBL status indicator is illuminated. Read DTCs from the flashing A/C status indictor. Does the A/C status indicator flash DTC 22? Yes Diagnose and Repair the DTC. Refer to appropriate DTC test in this article. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 2) .
2. 2) CHECK (C66) MODE DOOR DRIVER (A) 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 (C66) Mode Door Driver (A) circuit. Is the voltage above 0.2 volts? Yes Repair the (C66) Mode Door Driver (A) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C266) Mode Door Driver (B) circuit. Is the voltage above 0.2 volts? Yes Repair the (C266) Mode Door Driver (B) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C66) Mode Door Driver (A) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C66) Mode Door Driver (A) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 5) .
5. 5) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C266) Mode Door Driver (B) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C266) Mode Door Driver (B) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 6) .
6. 6) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C66) Mode Door Driver (A) circuit and the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C66) Mode Door Driver (A) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C66) Mode Door Driver (A) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 7) .
7. 7) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C266) Mode Door Driver (B) circuit and the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C266) Mode Door Driver (B) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C266) Mode Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 8) .
8. 8) CHECK MODE DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C66) Mode Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit in the A/C Heater Control C2 harness connector. What is the resistance? Below 30 Ohms Go To step 9) . Above 70 Ohms Go To step 10) . 30 to 70 Ohms Go To step 12) .
9. 9) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR A SHORT TO (C266) MODE DOOR DRIVER (B) CIRCUIT Disconnect the Mode Door Actuator harness connector. Measure the resistance between the (C66) Mode Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C66) Mode Door Driver (A) circuit for a short to the (C266) Mode Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Mode Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
10. 10) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR AN OPEN Disconnect the Mode Door Actuator harness connector. Measure the resistance of the (C66) Mode Door Driver (A) circuit between the A/C Heater Control C2 harness connector and the Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go To step 11) . No Repair the (C66) Mode Door Driver (A) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
11. 11) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR AN OPEN Measure the resistance of the (C266) Mode Door Driver (B) circuit between the A/C Heater Control C2 harness connector and the Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Mode Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C266) Mode Door Driver (B) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
12. 12) RUN THE ACTUATOR CALIBRATION FUNCTION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Reconnect the A/C Heater Control C2 harness connector. Actuate the Actuator Calibration function by performing the following: Turn the ignition on. Turn the blower control to off. Press the EBL mode switch down for 5 seconds and then release it. Wait approximately 90 seconds for the calibration process to run to completion before proceeding. Turn the ignition off, wait 10 seconds, and turn the ignition on. Actuate the Display DTC function by performing the following: Turn the blower control on. Press the A/C mode switch down, turn the blower control to off, wait 3 seconds and then release the A/C mode switch. NOTE: The A/C status indicator displays active DTCs when the EBL status indictor is not illuminated and stored DTCs when the EBL status indicator is illuminated. Read DTCs from the flashing A/C status indictor. Does the A/C status indicator flash DTC 15? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Using the wiring diagram as a guide inspect the wiring and connectors for a condition causing an intermittent loss of commutator pulses from the Mode Door Actuator. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: When driving the Blend Door Actuator.

1. Set Condition: If the A/C Heater Control fails to detect commutator pulses.

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) RUN THE ACTUATOR CALIBRATION FUNCTION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Actuate the Actuator Calibration function by performing the following: Turn the ignition on. Turn the blower control to off. Press the EBL mode switch down for 5 seconds and then release it. Wait approximately 90 seconds for the calibration process to run to completion before proceeding. Turn the ignition off, wait 10 seconds, and turn the ignition on. Actuate the Display DTC function by performing the following: Turn the blower control on. Press the A/C mode switch down, turn the blower control to off, wait 3 seconds and then release the A/C mode switch. NOTE: The A/C status indicator displays active DTCs when the EBL status indictor is not illuminated and stored DTCs when the EBL status indicator is illuminated. Read DTCs from the flashing A/C status indictor. Does the A/C status indicator flash DTC 18? Yes Diagnose and Repair the DTC. Refer to appropriate DTC test in this article. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 2) .
2. 2) CHECK (C55) LEFT BLEND DOOR DRIVER (A) 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 (C55) Left Blend Door Driver (A) circuit. Is the voltage above 0.2 volts? Yes Repair the (C55) Left Blend Door Driver (A) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C255) Left Blend Door Driver (B) circuit. Is the voltage above 0.2 volts? Yes Repair the (C255) Left Blend Door Driver (B) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C55) Left Blend Door Driver (A) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C55) Left Blend Door Driver (A) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 5) .
5. 5) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C255) Left Blend Door Driver (B) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C255) Left Blend Door Driver (B) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 6) .
6. 6) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C55) Left Blend Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C55) Left Blend Door Driver (A) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C55) Left Blend Door Driver (A) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 7) .
7. 7) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C255) Left Blend Door Driver (B) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C255) Left Blend Door Driver (B) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C255) Left Blend Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 8) .
8. 8) CHECK BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C55) Left Blend Door Driver (A) circuit and the (C255) Left Blend Door Driver (B) circuit in the A/C Heater Control C2 harness connector. What is the resistance? Below 30 Ohms Go To step 9) . Above 70 Ohms Go To step 10) . 30 to 70 Ohms Go To step 12) .
9. 9) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT Disconnect the Blend Door Actuator harness connector. Measure the resistance between the (C55) Left Blend Door Driver (A) circuit and the (C255) Left Blend Door Driver (B) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C55) Left Blend Door Driver (A) circuit for a short to the (C255) Left Blend Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Blend Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
10. 10) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR AN OPEN Disconnect the Blend Door Actuator harness connector. Measure the resistance of the (C55) Left Blend Door Driver (A) circuit between the A/C Heater Control C2 harness connector and the Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go To step 11) . No Repair the (C55) Left Blend Door Driver (A) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
11. 11) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR AN OPEN Measure the resistance of the (C255) Left Blend Door Driver (B) circuit between the A/C Heater Control C2 harness connector and the Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Blend Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C255) Left Blend Door Driver (B) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
12. 12) RUN THE ACTUATOR CALIBRATION FUNCTION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Reconnect the A/C Heater Control C2 harness connector. Actuate the Actuator Calibration function by performing the following: Turn the ignition on. Turn the blower control to off. Press the EBL mode switch down for 5 seconds and then release it. Wait approximately 90 seconds for the calibration process to run to completion before proceeding. Turn the ignition off, wait 10 seconds, and turn the ignition on. Actuate the Display DTC function by performing the following: Turn the blower control on. Press the A/C mode switch down, turn the blower control to off, wait 3 seconds and then release the A/C mode switch. NOTE: The A/C status indicator displays active DTCs when the EBL status indictor is not illuminated and stored DTCs when the EBL status indicator is illuminated. Read DTCs from the flashing A/C status indictor. Does the A/C status indicator flash DTC 17? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Using the wiring diagram as a guide, inspect the wiring and connectors for a condition causing an intermittent loss of commutator pulses from the Blend Door Actuator. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: During actuator calibration.

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

1. When Monitored: During actuator calibration.

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

1. When Monitored: During actuator calibration.

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

1. When Monitored: During actuator calibration.

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

1. When Monitored: When driving the Mode Door Actuator.

1. Set Condition: If the A/C Heater Control detects an excessive loss or gain of commutator pulses.

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.

1. When Monitored: When driving the Blend Door Actuator.

1. Set Condition: If the A/C Heater Control detects an excessive loss or gain of commutator pulses.

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.

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

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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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) 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 A/C Heater Control C2 harness connector. Is the resistance below 5.0 ohms? Yes Go To step 4) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
4. 4) 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 A/C Heater Control C2 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C121) Sensor Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

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1. 1) CHECK FOR DTC 32 - EVAPORATOR SENSOR SHORTED WITH EVAPORATOR TEMPERATURE SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Evaporator Temperature Sensor harness connector. Actuate the Clear DTC function by performing the following: Turn the ignition on. Turn the blower control on. Press the A/C mode switch down, turn the blower control to off, wait 3 seconds and then release the A/C mode switch. When the A/C status indicator begins flashing DTCs, press the A/C mode switch down for 3 seconds and then release the switch. Turn the ignition off, wait 10 seconds, and turn the ignition on. Actuate the Display DTC function by performing the following: Turn the blower control on. Press the A/C mode switch down, turn the blower control to off, wait 3 seconds and then release the A/C mode switch. NOTE: The A/C status indicator displays active DTCs when the EBL status indictor is not illuminated and stored DTCs when the EBL status indicator is illuminated. Read DTCs from the flashing A/C status indictor. Does the A/C status indicator flash DTC 32? Yes Go To step 2) . No Replace the Evaporator Temperature Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
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. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO (C121) SENSOR GROUND CIRCUIT 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. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

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1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the A/C mode switch is stays in a pushed position for more than 5 seconds.

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1. 1) INSPECT THE A/C HEATER CONTROL FOR DAMAGE Turn the ignition off. Inspect the A/C Heater Control for damage. Is the A/C Heater Control damaged? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 2) .
2. 2) INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE A/C MODE SWITCH TO STAY OR STICK IN A PUSHED POSITION Inspect the A/C Heater Control for anything that would cause the A/C mode switch to stay or stick in a pushed position. Is anything present that would cause the A/C mode switch to stay or stick in a pushed position? Yes Repair as necessary. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK THE A/C MODE SWITCH & STATUS INDICATOR FUNCTION WITH THE BLOWER CONTROL IN THE OFF POSITION Turn the ignition on. Turn the blower control off. Press the A/C mode switch on and off several times while observing the A/C status indicator. Does the A/C status indicator turn on and off? Yes Go To step 4) . No Go To step 7) .
4. 4) CHECK THE (C850) BLOWER SWITCH POSITION SIGNAL CIRCUIT VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C3 harness connector. Turn the ignition on. Measure the voltage of the (C850) Blower Switch Position Signal circuit. What is the voltage? Below 4.8 Volts Go To step 5) . Above 5.2 Volts Go To step 6) . 4.8 Volts To 5.2 Volts Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
5. 5) CHECK THE (C850) BLOWER SWITCH POSITION SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C850) Blower Switch Position Signal circuit between the A/C Heater Control C1 harness connector and the A/C Heater Control C3 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C850) Blower Switch Position Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
6. 6) CHECK THE (C850) BLOWER SWITCH POSITION 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 (C850) Blower Switch Position Signal circuit. Is the voltage above 0.2 volts? Yes Repair the (C850) Blower Switch Position Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
7. 7) CHECK THE A/C MODE SWITCH & STATUS INDICATOR FUNCTION WITH THE BLOWER CONTROL IN THE ON POSITION Turn the blower control on. Press the A/C mode switch on and off several times while observing the A/C status indicator. Does the A/C status indicator turn on and off? Yes Go To step 8) . No Go To step 9) .
8. 8) CHECK A/C HEATER CONTROL OPERATION BY ATTEMPTING TO ENTER DIAGNOSTIC MODE If illuminated, turn off the A/C status indicator and the EBL status indicator. Actuate the Display DTC function by performing the following: Turn the blower control on. Press the A/C mode switch down, turn the blower control to off, wait 3 seconds and then release the A/C mode switch. When entry mode is recognized, the A/C status indicator and the EBL status indicator will illuminate for 5 seconds and then display DTCs, if present. The A/C status indicator displays active DTCs when the EBL status indictor is not illuminated and stored DTCs when the EBL status indicator is illuminated. However, if no DTCs are present, both status indicators will turn off and the system will exit diagnostic mode. Did the A/C Heater Control enter diagnostic mode? Yes Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
9. 9) CHECK THE (C850) BLOWER SWITCH POSITION SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Disconnect the A/C Heater Control C3 harness connector. Measure the resistance of the (C850) Blower Switch Position Signal circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10K ohms? Yes Repair the (C850) Blower Switch Position Signal circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the EBL mode switch stays in a pushed position for more than 5 seconds.

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).

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the calculated checksum does not match the stored value.

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.

1. When Monitored: With the ignition on.

1. Set Condition: If the calculated checksum does not match the stored value.

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.

1. When Monitored: During actuator calibration.

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

1. When Monitored: During actuator calibration.

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

1. When Monitored: When driving the Right Blend Door Actuator.

1. Set Condition: If the A/C Heater Control detects an excessive loss or gain of commutator pulses.

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: When driving the Left Blend Door Actuator.

1. Set Condition: If the A/C Heater Control fails to detect commutator pulses.

Scheme 38

Scheme 39

Scheme 40

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

1. 1) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: B10A6 LEFT BLEND DOOR TRAVEL TOO SMALL? Yes Diagnose and Repair the DTC. Refer to appropriate DTC test in this article. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 2) .
2. 2) CHECK (C55) LEFT BLEND DOOR DRIVER (A) 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 (C55) Left Blend Door Driver (A) circuit. Is the voltage above 0.2 volts? Yes Repair the (C55) Left Blend Door Driver (A) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C255) Left Blend Door Driver (B) circuit. Is the voltage above 0.2 volts? Yes Repair the (C255) Left Blend Door Driver (B) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C55) Left Blend Door Driver (A) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C55) Left Blend Door Driver (A) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 5) .
5. 5) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C255) Left Blend Door Driver (B) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C255) Left Blend Door Driver (B) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 6) .
6. 6) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C55) Left Blend Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C252) Right Blend Door Driver (B) circuit, the (C52) Right Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C55) Left Blend Door Driver (A) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C55) Left Blend Door Driver (A) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 7) .
7. 7) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C255) Left Blend Door Driver (B) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C252) Right Blend Door Driver (B) circuit, the (C52) Right Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C255) Left Blend Door Driver (B) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C255) Left Blend Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 8) .
8. 8) CHECK LEFT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C55) Left Blend Door Driver (A) circuit and the (C255) Left Blend Door Driver (B) circuit in the A/C Heater Control C2 harness connector. What is the resistance? Below 30 Ohms Go To step 9) . Above 70 Ohms Go To step 10) . 30 to 70 Ohms Go To step 12) .
9. 9) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT Disconnect the Left Blend Door Actuator harness connector. Measure the resistance between the (C55) Left Blend Door Driver (A) circuit and the (C255) Left Blend Door Driver (B) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C55) Left Blend Door Driver (A) circuit for a short to the (C255) Left Blend Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Left Blend Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
10. 10) CHECK (C55) LEFT BLEND DOOR DRIVER (A) CIRCUIT FOR AN OPEN Disconnect the Left Blend Door Actuator harness connector. Measure the resistance of the (C55) Left Blend Door Driver (A) circuit between the A/C Heater Control C2 harness connector and the Left Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go To step 11) . No Repair the (C55) Left Blend Door Driver (A) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
11. 11) CHECK (C255) LEFT BLEND DOOR DRIVER (B) CIRCUIT FOR AN OPEN Measure the resistance of the (C255) Left Blend Door Driver (B) circuit between the A/C Heater Control C2 harness connector and the Left Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Left Blend Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C255) Left Blend Door Driver (B) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
12. 12) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Reconnect the A/C Heater Control C2 harness connector. Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: B10A2 - LEFT BLEND DOOR CONTROL CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Using the wiring diagram as a guide, inspect the wiring and connectors for a condition causing an intermittent loss of commutator pulses from the Left Blend Door Actuator. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: During actuator calibration.

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

1. When Monitored: During actuator calibration.

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

1. When Monitored: When driving the Left Blend Door Actuator.

1. Set Condition: If the A/C Heater Control detects an excessive loss or gain of commutator pulses.

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: When driving the Right Blend Door Actuator.

1. Set Condition: If the A/C Heater Control fails to detect commutator pulses.

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

1. 1) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: B10AD RIGHT BLEND DOOR TRAVEL TOO SMALL? Yes Diagnose and Repair the DTC. Refer to appropriate DTC test in this article. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 2) .
2. 2) CHECK (C52) RIGHT BLEND DOOR DRIVER (A) 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 (C52) Right Blend Door Driver (A) circuit. Is the voltage above 0.2 volts? Yes Repair the (C52) Right Blend Door Driver (A) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C252) RIGHT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C252) Right Blend Door Driver (B) circuit. Is the voltage above 0.2 volts? Yes Repair the (C252) Right Blend Door Driver (B) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (C52) RIGHT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C52) Right Blend Door Driver (A) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C52) Right Blend Door Driver (A) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 5) .
5. 5) CHECK (C252) RIGHT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C252) Right Blend Door Driver (B) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C252) Right Blend Door Driver (B) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 6) .
6. 6) CHECK (C52) RIGHT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C52) Right Blend Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C52) Right Blend Door Driver (A) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C52) Right Blend Door Driver (A) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 7) .
7. 7) CHECK (C252) RIGHT BLEND DOOR DRIVER (B) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C252) Right Blend Door Driver (B) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C252) Right Blend Door Driver (B) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C252) Right Blend Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 8) .
8. 8) CHECK RIGHT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C52) Right Blend Door Driver (A) circuit and the (C252) Right Blend Door Driver (B) circuit in the A/C Heater Control C2 harness connector. What is the resistance? Below 30 Ohms Go To step 9) . Above 70 Ohms Go To step 10) . 30 to 70 Ohms Go To step 12) .
9. 9) CHECK (C52) RIGHT BLEND DOOR DRIVER (A) CIRCUIT FOR A SHORT TO (C252) RIGHT BLEND DOOR DRIVER (B) CIRCUIT Disconnect the Right Blend Door Actuator harness connector. Measure the resistance between the (C52) Right Blend Door Driver (A) circuit and the (C252) Right Blend Door Driver (B) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C52) Right Blend Door Driver (A) circuit for a short to the (C252) Right Blend Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Right Blend Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
10. 10) CHECK (C52) RIGHT BLEND DOOR DRIVER (A) CIRCUIT FOR AN OPEN Disconnect the Right Blend Door Actuator harness connector. Measure the resistance of the (C52) Right Blend Door Driver (A) circuit between the A/C Heater Control C2 harness connector and the Right Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go To step 11) . No Repair the (C52) Right Blend Door Driver (A) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
11. 11) CHECK (C252) RIGHT BLEND DOOR DRIVER (B) CIRCUIT FOR AN OPEN Measure the resistance of the (C252) Right Blend Door Driver (B) circuit between the A/C Heater Control C2 harness connector and the Right Blend Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Right Blend Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C252) Right Blend Door Driver (B) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
12. 12) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Reconnect the A/C Heater Control C2 harness connector. Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: B10A9 - RIGHT BLEND DOOR CONTROL CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Using the wiring diagram as a guide, inspect the wiring and connectors for a condition causing an intermittent loss of commutator pulses from the Right Blend Door Actuator. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the IR Sensor fails the internal self test.

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: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the IR Sensor fails the internal self test.

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: 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 two minutes.

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the Recirculation mode switch is stuck in a pushed position for more than 5 seconds.

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: Following the Start Up Wait Time after ignition on with the EBL output turned off.

1. Set Condition: If the (C115) Rear Window Defogger Relay Control circuit is shorted to ground.

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 56

Scheme 57

Scheme 58

1. 1) INSTALL A SUBSTITUTE REAR WINDOW DEFOGGER RELAY & THEN CHECK FOR DTC B106B - REAR DEFROST CONTROL CIRCUIT LOW Turn the ignition on. Verify that the EBL mode switch is off. Turn the ignition off. Install a substitute Rear Window Defogger Relay. 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: B106B - REAR DEFROST CONTROL CIRCUIT LOW? Yes Go To step 2) . No Replace the original Rear Window Defogger Relay in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
2. 2) CHECK (C115) REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Remove the substitute Rear Window Defogger Relay. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (C115) Rear Window Defogger Relay Control circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C115) Rear Window Defogger Relay Control circuit for a short to ground. Reinstall the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C115) REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT FOR AN OPEN Measure the resistance of the (C115) Rear Window Defogger Relay Control circuit between the Rear Window Defogger Relay connector terminal 85 in the PDC and the A/C Heater Control C1 harness connector. Is the resistance below 5.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Reinstall the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C115) Rear Window Defogger Relay Control circuit for an open. Reinstall the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the EBL output is turned on and the (C115) Rear Window Defogger Relay Control circuit is either shorted to voltage or open.

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 59

1. 1) INSTALL A SUBSTITUTE REAR WINDOW DEFOGGER RELAY & THEN CHECK FOR DTC B106C - REAR DEFROST CONTROL CIRCUIT HIGH Turn the ignition on. Verify that the EBL mode switch is off. Turn the ignition off. Install a substitute Rear Window Defogger Relay. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. Press the EBL mode switch is on. With the scan tool, read HVAC DTCs. Does the scan tool display: B106C - REAR DEFROST CONTROL CIRCUIT HIGH? Yes Go To step 2) . No Replace the original Rear Window Defogger Relay in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
2. 2) CHECK (C115) REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition on. Verify that the EBL mode switch is off. Turn the ignition off. Remove the substitute Rear Window Defogger Relay. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C115) Rear Window Defogger Relay Control circuit. Is the voltage above 0.2 volts? Yes Repair the (C115) Rear Window Defogger Relay Control circuit for a short to voltage. Reinstall the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C115) REAR WINDOW DEFOGGER RELAY CONTROL CIRCUIT FOR AN OPEN Turn the ignition off. Measure the resistance of the (C115) Rear Window Defogger Relay Control circuit between the Rear Window Defogger Relay connector terminal 85 in the PDC and the A/C Heater Control C1 harness connector. Is the resistance below 5.0 ohms? Yes Replace the A/C Heater Control in accordance with the Service Information. Reinstall the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C115) Rear Window Defogger Relay Control circuit for an open. Reinstall the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: When driving the Mode Door Actuator.

1. Set Condition: If the A/C Heater Control detects an excessive loss or gain of commutator pulses.

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: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the A/C mode switch is stuck in a pushed position for more than 5 seconds.

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the EBL mode switch is stuck in a pushed position for more than 5 seconds.

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

Scheme 60

Scheme 61

1. 1) CHECK FOR DTC B1031 - EVAPORATOR FIN TEMPERATURE SENSOR CIRCUIT LOW WITH EVAPORATOR TEMPERATURE SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Evaporator Temperature Sensor harness connector. Turn the ignition on. With the scan tool, erase 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 step 2) . No Replace the Evaporator Temperature Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
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. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO (C121) SENSOR GROUND CIRCUIT 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. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

Scheme 62

Scheme 63

Scheme 64

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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) 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 A/C Heater Control C2 harness connector and the Evaporator Temperature Sensor harness connector. Is the resistance below 5.0 ohms? Yes Go To step 4) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
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 Evaporator Temperature Sensor 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C121) Sensor Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the IR Sensor fails the internal self test.

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: Following the Start Up Wait Time after ignition on.

1. Set Condition: If the IR Sensor fails the internal self test.

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: When driving the Mode Door Actuator.

1. Set Condition: If the A/C Heater Control fails to detect commutator pulses.

Scheme 65

Scheme 66

Scheme 67

Scheme 68

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Scheme 73

1. 1) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: B1044 PANEL MODE DOOR 1 TRAVEL RANGE TOO SMALL? Yes Diagnose and Repair the DTC. Refer to appropriate DTC test in this article. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 2) .
2. 2) CHECK (C66) MODE DOOR DRIVER (A) 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 (C66) Mode Door Driver (A) circuit. Is the voltage above 0.2 volts? Yes Repair the (C66) Mode Door Driver (A) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C266) Mode Door Driver (B) circuit. Is the voltage above 0.2 volts? Yes Repair the (C266) Mode Door Driver (B) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C66) Mode Door Driver (A) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C66) Mode Door Driver (A) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 5) .
5. 5) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C266) Mode Door Driver (B) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C266) Mode Door Driver (B) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 6) .
6. 6) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C66) Mode Door Driver (A) circuit and the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C252) Right Blend Door Driver (B) circuit, the (C52) Right Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C66) Mode Door Driver (A) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C66) Mode Door Driver (A) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 7) .
7. 7) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C266) Mode Door Driver (B) circuit and the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C252) Right Blend Door Driver (B) circuit, the (C52) Right Blend Door Driver (A) circuit, the (C268) Recirculation Door Driver (B) circuit, and the (C68) Recirculation Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C266) Mode Door Driver (B) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C266) Mode Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 8) .
8. 8) CHECK MODE DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C66) Mode Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit in the A/C Heater Control C2 harness connector. What is the resistance? Below 30 Ohms Go To step 9) . Above 70 Ohms Go To step 10) . 30 to 70 Ohms Go To step 12) .
9. 9) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR A SHORT TO (C266) MODE DOOR DRIVER (B) CIRCUIT Disconnect the Mode Door Actuator harness connector. Measure the resistance between the (C66) Mode Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C66) Mode Door Driver (A) circuit for a short to the (C266) Mode Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Mode Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
10. 10) CHECK (C66) MODE DOOR DRIVER (A) CIRCUIT FOR AN OPEN Disconnect the Mode Door Actuator harness connector. Measure the resistance of the (C66) Mode Door Driver (A) circuit between the A/C Heater Control C2 harness connector and the Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go To step 11) . No Repair the (C66) Mode Door Driver (A) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
11. 11) CHECK (C266) MODE DOOR DRIVER (B) CIRCUIT FOR AN OPEN Measure the resistance of the (C266) Mode Door Driver (B) circuit between the A/C Heater Control C2 harness connector and the Mode Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Replace the Mode Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C266) Mode Door Driver (B) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
12. 12) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Reconnect the A/C Heater Control C2 harness connector. Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Using the wiring diagram as a guide inspect the wiring and connectors for a condition causing an intermittent loss of commutator pulses from the Mode Door Actuator. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: During actuator calibration.

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

1. When Monitored: During actuator calibration.

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

1. When Monitored: When driving the Recirculation Door Actuator.

1. Set Condition: If the A/C Heater Control fails to detect commutator pulses.

Scheme 74

Scheme 75

Scheme 76

Scheme 77

Scheme 78

Scheme 79

Scheme 80

Scheme 81

Scheme 82

1. 1) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: B105C RECIRCULATION DOOR TRAVEL RANGE TOO SMALL? Yes Diagnose and Repair the DTC. Refer to appropriate DTC test in this article. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 2) .
2. 2) CHECK (C68) RECIRCULATION DOOR DRIVER (A) 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 (C68) Recirculation Door Driver (A) circuit. Is the voltage above 0.2 volts? Yes Repair the (C68) Recirculation Door Driver (A) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (C268) RECIRCULATION DOOR DRIVER (B) CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C268) Recirculation Door Driver (B) circuit. Is the voltage above 0.2 volts? Yes Repair the (C268) Recirculation Door Driver (B) circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (C68) RECIRCULATION DOOR DRIVER (A) CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance of the (C68) Recirculation Door Driver (A) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C68) Recirculation Door Driver (A) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 5) .
5. 5) CHECK (C268) RECIRCULATION DOOR DRIVER (B) CIRCUIT FOR A SHORT TO GROUND Measure the resistance of the (C268) Recirculation Door Driver (B) circuit between ground and the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C268) Recirculation Door Driver (B) circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 6) .
6. 6) CHECK (C68) RECIRCULATION DOOR DRIVER (A) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C68) Recirculation Door Driver (A) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C252) Right Blend Door Driver (B) circuit, and the (C52) Right Blend Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C68) Recirculation Door Driver (A) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C68) Recirculation Door Driver (A) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 7) .
7. 7) CHECK (C268) RECIRCULATION DOOR DRIVER (B) CIRCUIT FOR A SHORT TO OTHER DOOR DRIVER CIRCUIT(S) Measure the resistance between the (C268) Recirculation Door Driver (B) circuit and the (C266) Mode Door Driver (B) circuit, the (C66) Mode Door Driver (A) circuit, the (C255) Left Blend Door Driver (B) circuit, the (C55) Left Blend Door Driver (A) circuit, the (C252) Right Blend Door Driver (B) circuit, and the (C52) Right Blend Door Driver (A) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms between the (C268) Recirculation Door Driver (B) circuit and any of the other door driver circuits? Yes Repair the circuits with a resistance below 10k ohms for a short to the (C268) Recirculation Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 8) .
8. 8) CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C68) Recirculation Door Driver (A) circuit and the (C268) Recirculation Door Driver (B) circuit in the A/C Heater Control C2 harness connector. What is the resistance? Below 30 Ohms Go To step 9) . Above 70 Ohms Go To step 10) . 30 to 70 Ohms Go To step 12) .
9. 9) CHECK (C68) RECIRCULATION DOOR DRIVER (A) CIRCUIT FOR A SHORT TO (C268) RECIRCULATION DOOR DRIVER (B) CIRCUIT Disconnect the Recirculation Door Actuator harness connector. Measure the resistance between the (C68) Recirculation Door Driver (A) circuit and the (C268) Recirculation Door Driver (B) circuit in the A/C Heater Control C2 harness connector. Is the resistance below 10k ohms? Yes Repair the (C68) Recirculation Door Driver (A) circuit for a short to the (C268) Recirculation Door Driver (B) circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Recirculation Door Actuator in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
10. 10) CHECK (C68) RECIRCULATION DOOR DRIVER (A) CIRCUIT FOR AN OPEN Disconnect the Recirculation Door Actuator harness connector. Measure the resistance of the (C68) Recirculation Door Driver (A) circuit between the A/C Heater Control C2 harness connector and the Recirculation Door Actuator harness connector. Is the resistance below 5.0 ohms? Yes Go To step 11) . No Repair the (C68) Recirculation Door Driver (A) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
11. 11) CHECK (C268) RECIRCULATION DOOR DRIVER (B) CIRCUIT FOR AN OPEN Measure the resistance of the (C268) Recirculation Door Driver (B) circuit between the A/C Heater Control C2 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C268) Recirculation Door Driver (B) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
12. 12) RUN ACTUATOR CALIBRATION & THEN CHECK FOR DTCS IN THE A/C HEATER CONTROL Reconnect the A/C Heater Control C2 harness connector. Turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool display: B1058 - RECIRCULATION DOOR CONTROL CIRCUIT/PERFORMANCE? Yes Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Using the wiring diagram as a guide inspect the wiring and connectors for a condition causing an intermittent loss of commutator pulses from the Recirculation Door Actuator. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

Scheme 83

For the Manual Temperature Control (MTC) circuit diagram (Refer to HEATING & AIR CONDITIONING - SCHEMATICS AND DIAGRAMS) .

1. When Monitored: With the ignition on.

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

Scheme 84

Scheme 85

1. 1) VERIFY DTC B1082 - HVAC MUX CIRCUIT LOW IS ACTIVE Turn the ignition on. With the scan tool, erase CCN DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read CCN DTCs. Does the scan tool display active: B1082 - HVAC MUX CIRCUIT LOW? Yes Go To step 2) . No Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
2. 2) CHECK FOR DTC B1082 - HVAC MUX CIRCUIT LOW WITH A/C HEATER CONTROL C1 HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool, erase CCN DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read CCN DTCs. Does the scan tool display: B1082 - HVAC MUX CIRCUIT LOW? Yes Go To step 3) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
3. 3) CHECK (C105) HVAC MUX CONTROL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the Instrument Cluster C2 harness connector. Measure the resistance of the (C105) HVAC MUX Control circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (C105) HVAC MUX Control circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Instrument Cluster (CCN) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: With the ignition on.

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

Scheme 86

Scheme 87

1. 1) VERIFY DTC B1083 - HVAC MUX CIRCUIT HIGH IS ACTIVE Turn the ignition on. With the scan tool, erase CCN DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read CCN DTCs. Does the scan tool display active: B1083 - HVAC MUX CIRCUIT HIGH? Yes Go To step 2) . No Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
2. 2) CHECK (C105) HVAC MUX CONTROL CIRCUIT VOLTAGE AT A/C HEATER CONTROL C1 HARNESS CONNECTOR Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C105) HVAC MUX Control circuit. What is the voltage? Below 4.8 Volts Go To step 3) . 4.8 to 5.2 Volts Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . Above 5.2 Volts Go To step 4) .
3. 3) CHECK (C105) HVAC MUX CONTROL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the Instrument Cluster C2 harness connector. Measure the resistance of the (C105) HVAC MUX Control circuit between the A/C Heater Control C1 harness connector and the Instrument Cluster C2 harness connector. Is the resistance below 5.0 ohms? Yes Replace the Instrument Cluster (CCN) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (C105) HVAC MUX Control circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
4. 4) CHECK (C105) HVAC MUX CONTROL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Instrument Cluster C2 harness connector. Turn the ignition on. Measure the voltage of the (C105) HVAC MUX Control circuit. Is the voltage above 0.2 volts? Yes Repair the (C105) HVAC MUX Control circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the Instrument Cluster (CCN) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: When driving the Recirculation Door Actuator.

1. Set Condition: If the A/C Heater Control detects an excessive loss or gain of commutator pulses.

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: Following the Start Up Wait Time after ignition on.

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

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

Scheme 88

Scheme 89

Scheme 90

1. 1) CHECK FOR DTC B1601 - LEFT SOLAR SENSOR CIRCUIT LOW WITH SUN SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Sun Sensor harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display: B1601 - LEFT SOLAR SENSOR CIRCUIT LOW? Yes Go To step 2) . No Replace the Sun Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
2. 2) CHECK (G39) SUN SENSOR NO. 1 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 (G39) Sun Sensor No. 1 Signal circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (G39) Sun Sensor No. 1 Signal circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (G39) SUN SENSOR NO. 1 SIGNAL CIRCUIT FOR A SHORT TO (G939) SUN SENSOR RETURN CIRCUIT Measure the resistance between the (G39) Sun Sensor No. 1 Signal circuit and the (G939) Sun Sensor Return circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (G39) Sun Sensor No. 1 Signal circuit for a short to the (G939) Sun Sensor Return circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

Scheme 91

Scheme 92

Scheme 93

Scheme 94

1. 1) CHECK (G39) SUN SENSOR NO. 1 SIGNAL CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Sun Sensor harness connector. Turn the ignition on. Measure the voltage of the (G39) Sun Sensor No. 1 Signal circuit. What voltage is present? Above 5.2 Volts Go To step 2) . 4.8 Volts to 5.2 Volts Go To step 3) . Below 4.8 Volts Go To step 5) .
2. 2) CHECK (G39) SUN SENSOR NO. 1 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 (G39) Sun Sensor No. 1 Signal circuit. Is the voltage above 0.2 volts? Yes Repair the (G39) Sun Sensor No. 1 Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
3. 3) CHECK (G939) SUN SENSOR RETURN CIRCUIT FUNCTION Turn the ignition off. Connect a jumper wire between the (G39) Sun Sensor No. 1 Signal circuit and the (G939) Sun Sensor Return circuit in the Sun Sensor harness connector. Turn the ignition on. With the scan tool in HVAC, select Data Display and read the Left Solar Sensor voltage. Is the voltage below 0.2 volts? Yes Replace the Sun Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (G939) SUN SENSOR RETURN CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (G939) Sun Sensor Return circuit between the Sun Sensor harness connector and the A/C Heater Control C1 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (G939) Sun Sensor Return circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
5. 5) CHECK (G39) SUN SENSOR NO. 1 SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (G39) Sun Sensor No. 1 Signal circuit between the Sun Sensor harness connector and the A/C Heater Control C1 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (G39) Sun Sensor No. 1 Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

Scheme 95

For the Automatic Temperature Control (ATC) circuit diagram (Refer to HEATING & AIR CONDITIONING - SCHEMATICS AND DIAGRAMS) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

Scheme 96

Scheme 97

1. 1) CHECK FOR DTC B1604 - RIGHT SOLAR SENSOR CIRCUIT LOW WITH SUN SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Sun Sensor harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display: B1604 - RIGHT SOLAR SENSOR CIRCUIT LOW? Yes Go To step 2) . No Replace the Sun Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
2. 2) CHECK (G139) SUN SENSOR NO. 2 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 (G139) Sun Sensor No. 2 Signal circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (G139) Sun Sensor No. 2 Signal circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO (G939) SUN SENSOR RETURN CIRCUIT Measure the resistance between the (G139) Sun Sensor No. 2 Signal circuit and the (G939) Sun Sensor Return circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (G139) Sun Sensor No. 2 Signal circuit for a short to the (G939) Sun Sensor Return circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

Scheme 98

Scheme 99

Scheme 100

1. 1) CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Sun Sensor harness connector. Turn the ignition on. Measure the voltage of the (G139) Sun Sensor No. 2 Signal circuit. What voltage is present? Above 5.2 Volts Go To step 2) . 4.8 Volts to 5.2 Volts Go To step 3) . Below 4.8 Volts Go To step 5) .
2. 2) CHECK (G139) SUN SENSOR NO. 2 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 (G139) Sun Sensor No. 2 Signal circuit. Is the voltage above 0.2 volts? Yes Repair the (G139) Sun Sensor No. 2 Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
3. 3) CHECK (G939) SUN SENSOR RETURN CIRCUIT FUNCTION Turn the ignition off. Connect a jumper wire between the (G139) Sun Sensor No. 2 Signal circuit and the (G939) Sun Sensor Return circuit in the Sun Sensor harness connector. Turn the ignition on. With the scan tool in HVAC, select Data Display and read the Right Solar Sensor voltage. Is the voltage below 0.2 volts? Yes Replace the Sun Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (G939) SUN SENSOR RETURN CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (G939) Sun Sensor Return circuit between the Sun Sensor harness connector and the A/C Heater Control C1 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (G939) Sun Sensor Return circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
5. 5) CHECK (G139) SUN SENSOR NO. 2 SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (G139) Sun Sensor No. 2 Signal circuit between the Sun Sensor harness connector and the A/C Heater Control C1 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (G139) Sun Sensor No. 2 Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

Scheme 101

For the Automatic Temperature Control (ATC) circuit diagram (Refer to HEATING & AIR CONDITIONING - SCHEMATICS AND DIAGRAMS) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

Scheme 102

Scheme 103

1. 1) CHECK FOR DTC B1610 - AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW WITH SUN SENSOR HARNESS CONNECTOR DISCONNECTED Turn the ignition off. Disconnect the Sun Sensor harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and turn the ignition on. With the scan tool, read HVAC DTCs. Does the scan tool display: B1610 - AMBIENT LIGHT SENSOR INPUT CIRCUIT LOW? Yes Go To step 2) . No Replace the Sun Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
2. 2) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (L24) Auto Headlamps Signal circuit between ground and the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (L24) Auto Headlamps Signal circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 3) .
3. 3) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO (G939) SUN SENSOR RETURN CIRCUIT Measure the resistance between the (L24) Auto Headlamps Signal circuit and the (G939) Sun Sensor Return circuit in the A/C Heater Control C1 harness connector. Is the resistance below 10k ohms? Yes Repair the (L24) Auto Headlamps Signal circuit for a short to the (G939) Sun Sensor Return circuit. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

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

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

Scheme 104

Scheme 105

Scheme 106

1. 1) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT VOLTAGE Turn the ignition off. Disconnect the Sun Sensor harness connector. Turn the ignition on. Measure the voltage of the (L24) Auto Headlamps Signal circuit. What voltage is present? Above 5.2 Volts Go To step 2) . 4.8 Volts to 5.2 Volts Go To step 3) . Below 4.8 Volts Go To step 5) .
2. 2) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (L24) Auto Headlamps Signal circuit. Is the voltage above 0.2 volts? Yes Repair the (L24) Auto Headlamps Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Replace the A/C Heater Control in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
3. 3) CHECK (G939) SUN SENSOR RETURN CIRCUIT FUNCTION Turn the ignition off. Connect a jumper wire between the (L24) Auto Headlamps Signal circuit and the (G939) Sun Sensor Return circuit in the Sun Sensor harness connector. Turn the ignition on. With the scan tool in HVAC, select Data Display and read the Ambient Light Sensor voltage. Is the voltage below 0.2 volts? Yes Replace the Sun Sensor in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Go To step 4) .
4. 4) CHECK (G939) SUN SENSOR RETURN CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (G939) Sun Sensor Return circuit between the Sun Sensor harness connector and the A/C Heater Control C1 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (G939) Sun Sensor Return circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
5. 5) CHECK (L24) AUTO HEADLAMPS SIGNAL CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance of the (L24) Auto Headlamps Signal circuit between the Sun Sensor harness connector and the A/C Heater Control C1 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (L24) Auto Headlamps Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: Following the Start Up Wait Time after ignition on.

1. Set Condition: If vehicle line and country code data transmitted on the CAN B Bus doesn't correspond with data stored in the A/C Heater Control.

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 has an internal fault.

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: Continuously

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

Scheme 107

Scheme 108

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 step 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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
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 ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING)»(ref-246941-S09324268122007011000000) . No Go To step 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 step 4) . No Repair the (D55) CAN B Bus (+) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .
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. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) . No Repair the (D54) CAN B Bus (-) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. «(Refer to BODY VERIFICATION TEST - VER 1)»(ref-246912-S19033985802007011000000) .

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Front Control Module (FCM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Occupant Restraint Controller (ORC).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Occupant Classification Module (OCM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Cluster (CCN).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Compass Temperature Module (EOM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Parktronics (PTS).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Vehicle Security Control Module (SKREEM/WCM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Sunroof Control Module (SCM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Headlamp Leveling Translator.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Radio.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Amplifier (AMP).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Satellite Audio Receiver (SDARS).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Hands Free Phone Module (HFM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Driver Door Module (DDM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Passenger Door Module (PDM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Heated Seat Module (HSM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Memory Seat Module (MSM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Steering Column Control Module (SCCM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control looses communication with the Rain Sensing Module (RSM).