P1274

P1274-A/C CLUTCH CONTROL CIRCUIT 2 OPEN





For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting A/C Clutch operation.

- Set Condition:

An open condition has been detected in the A/C Clutch Control Output circuit by the TIPM. One Trip Fault. Three good trips to turn off the MIL.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. A/C CLUTCH OPERATION

Ignition on, engine not running.

With a scan tool under the PCM Actuators, actuate the A/C Clutch.

Is the A/C Clutch actuating?

Yes

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition

No

- Go To 2

2. A/C CLUTCH CONTROL OPERATION FROM THE PCM





Turn the ignition off.

Disconnect the C2 TIPM harness connector.

Ignition on, engine not running.

Using the scan tool under the PCM Actuators, actuate the A/C Clutch.

With a 12-volt test light connected to ground, probe the (C13) A/C Clutch Control circuit in the C2 TIPM harness connector.

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

Yes

- Go To 3

No

- Perform the Diagnostic Procedure for P0646-A/C CLUTCH CONTROL CIRCUIT. P0646

3. (C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT OPEN





Turn the ignition off

Disconnect the TIPM C9 harness connector.

Disconnect the A/C Clutch harness connector.

Measure the resistance of the (C3) A/C Clutch Control Output circuit between the TIPM C9 harness connector and the A/C Clutch harness connector.

Is the resistance below 5.0 ohms?

Yes

- Go To 4

No

- Repair the open in the (C3) A/C Clutch Control Output circuit.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

4. A/C CLUTCH





Connect the C2 and C9 TIPM harness connectors.

Ignition on, engine not running.

Using the scan tool under the TIPM Actuators, actuate the A/C Clutch.

With a 12-volt test light connected to ground, probe the (C3) A/C Clutch Control Output circuit at the A/C Clutch harness connector.

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

Yes

- Replace the A/C Clutch.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 5

5. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors.

Pay particular attention to all Power and Ground circuits.

Were any problems found?

Yes

- Repair as necessary.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test