Operation CHARM: Car repair manuals for everyone.

Pinpoint Test 4

PINPOINT TEST 4: THE AIR CONDITIONING (A/C) IS ALWAYS ON

Step 1 - 6:




Step 7 - 11:















Normal Operation
Under normal operation, the A/C system is be activated when the function selector switch is in the NORMAL A/C, MAX A/C, FLOOR/VENT, MIX, or DEFROST modes. The PCM controls the cycling of the A/C compressor clutch.

Possible Causes
- circuit (DG/O) short to power
- circuit (GY/W) short to power
- circuit (P/Y) short to ground
- circuit (V) short to power
- circuit (R/Y) short to power
- A/C clutch relay
- A/C compressor clutch
- function selector switch
- PCM