Air Conditioning Clutch Control Circuit 2 Overcurrent

P1275 - Air Conditioning Clutch Control Circuit 2 Overcurrent






For a complete wiring diagram, refer to.

• When Monitored: With the ignition ON, the battery voltage greater than 10.4 volts, and the totally integrated power module requesting A/C clutch operation.

• Set Condition: An overcurrent condition is detected in the A/C clutch control output circuit.






• Always perform the pre-diagnostic troubleshooting procedure before proceeding. Refer to => Non-DTC Based Diagnostics. Pre-Diagnostic Troubleshooting Procedure

Test Step 1 - Active DTC

• Start the engine.

• Allow the engine to reach normal operating temperature.

• Turn the A/C ON.

• With a scan tool, select view DTCs.

Is the DTC active at this time?

Yes

• Go to Test Step 2.

No

• Perform the Intermittent Condition diagnostic procedure. Refer to => Non-DTC Based Diagnostics.

Test Step 2 - Connector and Terminal Inspection

• Turn the ignition OFF.

• Disconnect the TIPM harness connector.

• Disconnect the A/C clutch harness connector.

• Inspect the terminal and connector condition. Test for signs of corrosion build up or damage the would compromise the terminal to controller pin connector.

• Make sure that all inline connectors are inspected for corrosion and/or damage.

• Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.

Were any of the more than conditions found?

Yes

• Repair or replace as necessary.

• Perform the Powertrain Verification Test. Refer to => Non-DTC Based Diagnostics. PCM Verification Test

No

• Go to Test Step 3.

Test Step 3 - A/C Clutch Control Output Circuit Excessive Resistance






• With a jumper wire, connect one end to the A/C clutch control output circuit in the A/C clutch harness connector and the other to a clean chassis ground.

• Using a test lamp connected to battery voltage, probe the A/C clutch control output circuit in the TIPM harness connector.

• The test lamp should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test lamp illuminate brightly?

Yes

• Go to Test Step 4.

No

• Repair the excessive resistance in the circuit.

• Perform the Powertrain Verification Test. Refer to => Non-DTC Based Diagnostics. PCM Verification Test

Test Step 4 - A/C Clutch Ground Circuit






• Using a test lamp connected to battery voltage, probe the A/C clutch ground circuit in the A/C clutch harness connector.

• The test lamp should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test lamp illuminate brightly?

Yes

• Go to Test Step 5.

No

• Repair the excessive resistance in the ground circuit.

• Perform the Powertrain Verification Test. Refer to => Non-DTC Based Diagnostics. PCM Verification Test

Test Step 5 - A/C Clutch Control Output from TIPM






• Connect the TIPM harness connector.

• Ignition ON, engine not running.

• Using the test lamp connected to ground, probe the A/C clutch control output circuit in the A/C clutch harness connector.

• With a scan tool in the TIPM Actuators, actuate the A/C clutch.

• The test lamp should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test lamp illuminate brightly?

Yes

• Replace the A/C clutch.

• Perform the Powertrain Verification Test. Refer to => Non-DTC Based Diagnostics. PCM Verification Test

No

• Replace the TIPM.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior