Symptom Checks

Perform the following:

• Ensure A/C system (demand switch) is off. Disconnect A/C clutch and start engine. Check voltage at A/C clutch. If voltage is less than 2 volts, check A/C compressor and A/C system for malfunction.
• If voltage is more than 2 volts, check if A/C compressor can be turned off with A/C demand switch. If A/C compressor turns off, connect A/C manifold gauge set, and perform A/C system functional test.
• If A/C compressor does not turn off, perform Key On Engine Off (KOEO) Self-Test. See step 14) of DIAGNOSTIC SUB-ROUTINES. If no fault is indicated, check A/C system for malfunction.