P1273-A/C CLUTCH CONTROL CIRCUIT 2 HIGH (TIPM)
For a complete wiring diagram Refer to Section 8W.
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When Monitored:
With the ignition on. Battery voltage greater than 10 volts. A/C Switch on.
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Set Condition:
A shorted high 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.
Possible Causes
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(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE
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EXCESSIVE RESISTANCE IN THE (Z906) A/C CLUTCH GROUND CIRCUIT
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A/C COMPRESSOR CLUTCH
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TIPM
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Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
(Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
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
No
2.
A/C CLUTCH CONTROL OPERATION FROM THE PCM
Turn the ignition off.
Disconnect the C1 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 C1 TIPM harness connector.
Does the test light illuminate brightly and flash on and off?
Yes
No
3.
(C3) A/C CLUTCH CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off.
Disconnect the A/C Compressor Clutch harness connector.
Ignition on, engine not running.
Measure the voltage on the (C3) A/C Clutch Control Output circuit at the A/C Compressor Clutch harness connector.
Is any voltage present?
Yes
No
4.
A/C CLUTCH GROUND CIRCUIT OPEN
Turn the ignition off.
Connect the C1 TIPM harness connector.
Using a 12-volt test light connected to 12-volts, probe the (Z906) A/C Clutch ground circuit at the A/C Compressor Clutch harness connector.
Does the test light illuminate brightly?
Yes
No
5.
A/C COMPRESSOR CLUTCH
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 Compressor Clutch harness connector.
Does the test light illuminate brightly and flash on and off?
Yes
No
6.
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
No