Symptom Checks

Perform the following:

• Perform Key On Engine Off (KOEO) Self-Test. See step 14) of DIAGNOSTIC SUB-ROUTINES. If continuous memory Diagnostic Trouble Code (11/111-10-11/111) was NOT displayed during KOEO Self-Test, perform appropriate CIRCUIT TEST in TESTS W/CODES article in the ENGINE PERFORMANCE section.
• Ensure A/C system (demand switch) is on. Check voltage at A/C clutch. Wait at least 10 seconds for normal on/off cycling.
• If voltage to A/C clutch does not exist, go to step 1) of CIRCUIT TEST KM in appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section.
• If voltage to A/C clutch exists, connect A/C manifold gauge set, and perform A/C system functional test.