GM Service Manual Online
For 1990-2009 cars only

A/C Compressor Clutch Will Not Disengage (CJ2)

Step

Action

Value(s)

Yes

No

DEFINITION: A/C compressor clutch will not disengage when no A/C request has been made and no Powertrain DTC has been set.

1

Was the Powertrain On-Board Diagnostic (OBD) system check performed?

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Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

2

Are there any DTCs set?

--

Go to the applicable DTC table

Go to Step 3

3

  1. Disconnect the A/C CLU Micro relay #34 form the underhood electrical center.
  2. Turn the ignition switch to the RUN position.

Does the A/C clutch disengage?

--

Go to Step 5

Go to Step 4

4

Locate and repair a short to B+ in CKT 59 between the underhood electrical center and the A/C compressor clutch connector.

Is the repair complete?

--

Recheck System Operation

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5

Replace the A/C CLU micro relay #34.

Is the replacement complete?

--

Recheck System Operation

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