P1273

P1273-A/C CONTROL CIRCUIT 2 HIGH





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

Battery voltage greater than 10 Volts.

Air Conditioning (A/C) Switch on.

- Set Condition:
The Totally Integrated Power Module (TIPM) detects a higher than expected voltage in the A/C Clutch Control Output circuit.





1. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
3. Turn the A/C on.
4. Using the scan tool, select View DTCs.

Is the DTC Active at this time?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

2. (C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Disconnect the A/C Compressor Clutch harness connector.
4. Ignition on, engine not running.
5. Measure the voltage of the (C3) A/C Clutch Control Output circuit.

Is there any voltage present?

Yes

- Repair the short to voltage in the (C3) A/C Clutch Control Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. A/C CLUTCH GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Connect the TIPM C1 harness connector.
3. Using a 12-volt test light connected to 12-volts, check the (Z908)/(Z916) Ground circuit.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the excessive resistance in the (Z908)/(Z916) Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. A/C COMPRESSOR CLUTCH




1. Ignition on, engine not running.
2. With a 12-volt test light connected to ground, check the (C3) A/C Clutch Control Output circuit.
3. Using the scan tool under the TIPM Actuators, actuate the A/C Clutch.

Does the test light illuminate brightly and flash on and off?

Yes

- Replace the A/C Compressor Clutch.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 5

5. TOTALLY INTEGRATED POWER MODULE (TIPM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the A/C Compressor Clutch and TIPM.
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the A/C Compressor Clutch and TIPM.
4. Perform any Technical Service Bulletins that may apply.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the TIPM.
- Perform the BODY VERIFICATION TEST. Body Verification Test.