HVAC Systems - Electrical Diagnostics: Other Jeep Liberty II

Monitor Conditions

1. When Monitored: With the ignition on.

Set Conditions

1. Set Condition: If the A/C request switch is detected in a pushed position for more than 10 minutes.

Possible Causes

1. When Monitored: With the ignition on.

1. Set Condition: If the panel mode switch is detected in a pushed position for more than 10 minutes.

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: If the recirculation switch is detected in a pushed position for more than 10 minutes.

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: If the defrost switch is detected in a pushed position for more than 10 minutes.

1. When Monitored: With the ignition on.

1. Set Condition: If the rear defrost switch is detected in a pushed position for more than 10 minutes.

1. When Monitored: With the ignition on.

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

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1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, turn the heater on. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. CHECK FOR DTC WITH THE 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 this DTC as active? Yes Go to step 3 . No Replace the Evaporator Temperature Sensor in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
3. CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Measure the resistance between ground and the (C21) Evaporator Temperature Sensor Signal circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Replace the A/C Heater Control in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .

1. When Monitored: With the ignition on.

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

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1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, turn the heater on. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C21) Evaporator Temperature Sensor Signal circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 3 .
3. CHECK (C21) EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT, (C121) SENSOR GROUND CIRCUIT, AND EVAPORATOR TEMPERATURE SENSOR Turn the ignition off. Measure the resistance between the (C21) Evaporator Temperature Sensor Signal circuit and the (C121) Sensor Ground circuit in the A/C Heater Control C1 harness connector. The approximate circuit resistance should be as follows: 1468 ohms @ 40°C (104°F) 1800 ohms @ 35°C (95°F) 2221 ohms @ 30°C (86°F) 2757 ohms @ 25°C (77°F) 3443 ohms @ 20°C (68°F) 4330 ohms @ 15°C (59°F) 5485 ohms @ 10°C (50°F) 6998 ohms @ 5°C (41°F) 7354 ohms @ 4°C (39°F) 7731 ohms @ 3°C (37°F) 8130 ohms @ 2°C (36°F) 8553 ohms @ 1°C (34°F) 9000 ohms @ 0°C (32°F)
4. 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 C1 harness connector and the Evaporator Temperature Sensor harness connector. Does the ohm meter read open circuit? Yes Repair the (C21) Evaporator Temperature Sensor Signal circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 5 .
5. CHECK (C121) SENSOR GROUND CIRCUIT FOR AN OPEN Measure the resistance of the (C121) Sensor Ground circuit between the A/C Heater Control C1 harness connector and the Evaporator Temperature Sensor harness connector. Does the ohm meter read open circuit? Yes Repair the (C121) Sensor Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Replace the Evaporator Temperature Sensor in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .

1. When Monitored: With the 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: With the 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: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short to ground or to voltage on the (C32) Recirculation Door Driver, the (C54) Blend Door Driver, or the (C154) Common Door Driver circuits while attempting to drive the (C35) Mode Door Driver.

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1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, actuate the Mode Door. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Measure the voltage of the (C32) Recirculation Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C32) Recirculation Door Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 3 .
3. CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C35) Mode Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C35) Mode Door Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 4 .
4. CHECK (C54) BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C54) Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C54) Blend Door Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 5 .
5. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO VOLTAGE Measure the voltage of the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (C154) Common Door Driver circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 6 .
6. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Turn the ignition off. Measure the resistance between ground and the (C32) Recirculation Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to step 7 . No Repair the (C32) Recirculation Door Driver circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
7. CHECK (C54) DRIVER BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C54) Driver Blend Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to step 8 . No Repair the (C54) Driver Blend Door Driver circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
8. CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C35) Mode Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to step 9 . No Repair the (C35) Mode Door Driver circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
9. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR A SHORT TO GROUND Measure the resistance between ground and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Does the ohm meter read open circuit? Yes Go to step 10 . No Repair the (C154) Common Door Driver circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
10. CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to step 11 . No Replace the Recirculation Door Actuator in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
11. CHECK MODE DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C35) Mode Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to step 12 . No Replace the Mode Door Actuator in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
12. CHECK BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Measure the resistance between the (C54) Blend Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Go to step 13 . No Replace the Blend Door Actuator in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
13. RUN THE ACTUATOR CALIBRATION TEST Reconnect the A/C Heater Control C1 harness connector. Turn the ignition on. With the scan tool, erase HVAC DTCs. Turn the ignition off, wait 10 seconds, and then turn the ignition on. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs. Does the scan tool only display: 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 «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No, Other DTC(s) Displayed Diagnose and repair the other DTC(s). Refer to «DIAGNOSTIC CODE INDEX»(ref-350063-S07354539842009121400000) for a complete list of all HVAC related symptoms. No, And No Other DTCs Displayed Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an intermittent short. Repair as necessary. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .

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1. When Monitored: With the ignition on.

1. Set Condition: If Mode Door Actuator's electrical circuit is open.

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1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, actuate the Panel Mode Door. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Mode Door Actuator harness connector. Measure the resistance of the (C154) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door Actuator harness connector. Does the ohm meter read open circuit? Yes Repair the (C154) Common Door Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 3 .
3. CHECK (C35) MODE DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C35) Mode Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door Actuator harness connector. Does the ohm meter read open circuit? Yes Repair the (C35) Mode Door Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 4 .
4. CHECK MODE DOOR ACTUATOR CIRCUIT RESISTANCE Reconnect the Mode Door Actuator harness connector. Measure the resistance between the (C35) Mode Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Replace the A/C Heater Control in accordance with the service information. No Replace the Mode Door Actuator in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .

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 1 (Floor to Panel) Door exceeds the high range limit.

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short to ground or to voltage on the (C32) Recirculation Door Driver, the (C54) Blend Door Driver, the (C35) Mode Door Driver, or the (C154) Common Door Driver circuits while attempting to drive the (C32) Recirculation Door Driver.

1. When Monitored: With the ignition on.

1. Set Condition: If the Recirculation Door Actuator's electrical circuit is open.

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1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, actuate the Recirculation Door. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Recirculation Door Actuator harness connector. Measure the resistance of the (C32) Recirculation Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector. Does the ohm meter read open circuit? Yes Repair the (C32) Recirculation Door Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 3 .
3. CHECK (C154) COMMON DOOR DRIVER 2 CIRCUIT FOR AN OPEN Measure the resistance of the (C154) Common Door Driver 2 circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector. Does the ohm meter read open circuit? Yes Repair the (C154) Common Door Driver 2 circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 4 .
4. CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE Reconnect the Recirculation Door Actuator harness connector. Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C154) Common Door Driver 2 circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Replace the Recirculation Door Actuator in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Replace the A/C Heater Control in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .

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: With the ignition on.

1. Set Condition: If the A/C Heater Control detects a short to ground or to voltage on the (C32) Recirculation Door Driver, the (C35) Mode Door Driver, or the (C154) Common Door Driver circuits while attempting to drive the (C54) Blend Door Driver.

1. When Monitored: With the ignition on.

1. Set Condition: If the Left Blend Door Actuator's electrical circuit is open.

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1. ACTIVE DTC(S) PRESENT Turn the ignition on. Using the A/C Heater Control, actuate the Left Blend Door. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. CHECK (C154) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Disconnect the Left Blend Door Actuator harness connector. Measure the resistance of the (C154) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Left Blend Door Actuator harness connector. Does the ohm meter read open circuit? Yes Repair the (C154) Common Door Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 3
3. CHECK (C54) LEFT BLEND DOOR DRIVER CIRCUIT FOR AN OPEN Measure the resistance of the (C54) Driver Blend Door Driver circuit between the A/C Heater Control C1 way harness connector and the Left Blend Door Actuator harness connector. Does the ohm meter read open circuit? Yes Repair the (C54) Driver Blend Door Driver circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Go to step 4 .
4. CHECK LEFT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE Reconnect the Left Blend Door Actuator harness connector. Measure the resistance between the (C54) Driver Blend Door Driver circuit and the (C154) Common Door Driver circuit in the A/C Heater Control C1 harness connector. Is the resistance between 30 and 40 ohms? Yes Replace the A/C Heater Control in accordance with the service information. No Replace the Mode Door Actuator in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .

1. When Monitored: With the 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: With the 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: With the ignition on.

1. Set Condition: If the Ambient Light Sensor input is out of range.

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition switch on.

1. Set Condition: The A/C Heater Control has detected the system voltage is low.

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1. VERIFY THE DTC IS ACTIVE NOTE: Diagnose any related Powertrain DTCs before continuing. Turn the ignition switch on. With a scan tool, read and record DTCs. With the scan tool, clear DTCs. Turn the ignition switch off, and then on. Using the scan tool, read DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. (F943) FUSED RUN-START RELAY OUTPUT CIRCUIT OPEN NOTE: Check the related fuses to the Fused Ignition Switch Output (Run-Start) circuit. If the fuse is found to be open repair the circuit for a shorted condition. Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Turn the ignition on. Using a 12 volt test light connected to ground, probe the (F943) Fused Run-Start Relay Output circuit in the A/C Heater Control C1 harness connector. Does the test light illuminate brightly? Yes Go to step 3 No Repair the (F943) Fused Run-Start Relay Output circuit for an open. Perform BODY VERIFICATION. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
3. CHECK THE A/C HEATER CONTROL NOTE: A dirty (partial) ground can cause abnormal conditions within a system. Make sure the module has a good ground before continuing. Turn the ignition off. Reconnect the A/C Heater Control C1 harness connector. While back probing, measure the voltage of the (F943) Fused Run-Start Relay Output circuit in the A/C Heater Control C1 harness connector. Start the engine. Using the scan tool, view battery voltage under Data Display in the Engine category. Compare the voltage on the scan tool to the voltage reading on the voltmeter. Is the voltage on the scan tool equal to the voltmeter reading within +/- 0.5 volt? Yes Replace the A/C Heater Control in accordance with the service information. Perform BODY VERIFICATION. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Repair the circuit(s) that indicated the incorrect voltage. Perform the WCM VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Wireless Control (WCM) - Standard Procedure»(ref-350088-S39331651162009121400000)

1. When Monitored: With the ignition switch on.

1. Set Condition: The A/C Heater Control has detected the system voltage is high.

Scheme 33

1. ACTIVE DTC(S) PRESENT Turn the ignition on. With the scan tool, check for DTCs. Does the scan tool display this DTC as active? Yes Go to step 2 No The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary. Perform BODY VERIFICATION. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .
2. CHECK (F943) FUSED RUN-START RELAY OUTPUT CIRCUIT FOR A SHORT TO BATTERY VOLTAGE Turn the ignition off. Disconnect the A/C Heater Control C1 harness connector. Using a volt meter measure the voltage on the (F943) Fused Run-Start Relay Output circuit in the A/C Heater Control C1 harness connector. Is there any voltage present? Yes Repair the (F943) Fused Run-Start Relay Output circuit for a short to voltage. Perform BODY VERIFICATION. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) . No Replace the A/C Heater Control in accordance with the service information. Perform BODY VERIFICATION. Refer to «DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure»(ref-350093-S36937059432009121400000) .

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: The A/C Heater Control will receive and monitor the vehicle line message from the PCM and record the vehicle line if different from the last vehicle line.

1. When Monitored: Continuously

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

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control loses communication with the Totally Integrated Power Module (TIPM).

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control loses communication with the Intrusion Transceiver Control Module (ITM).

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control loses communication with the DVD Player.

1. When Monitored: With the ignition on.

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

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control loses communication with the Left Front Door Module (LRDM).

1. When Monitored: With the ignition on.

1. Set Condition: If the A/C Heater Control loses communication with the Right Front Door Module (LRDM).

1. When Monitored: With the ignition on.

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