Test J: The Air Conditioning (A/C) Is Inoperative/Does Not Operate Correctly

PINPOINT TEST J: THE AIR CONDITIONING (A/C) IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

Normal Operation
Under normal operation, when A/C is requested, a message is sent over the bus to the PCM (electronic automatic temperature control [EATC] systems) or sends voltage to the PCM through circuit CH443 (GN/OG) (manual climate control systems). The PCM receives input from the A/C cycling switch through circuit CH423 (YE). Ground is provided to the A/C cycling switch through circuit GD113 (BK/YE).

The PCM provides a ground for the A/C clutch relay coil through circuit CH302 (WH/BN). The A/C clutch relay coil receives ignition voltage through circuit CBB40 (YE/GN). Ignition voltage for the A/C clutch relay switch is provided through circuit SBB35 (BU/RD). When the relay is activated, ignition voltage is supplied to the A/C clutch solenoid through circuit CH401 (VT/WH). Ground is supplied for the A/C clutch through circuit GD120 (BK).

This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- PCM
- (EATC systems) HVAC module - EATC
- (Manual climate control systems) Function selector switch
- A/C cycling switch
- A/C compressor clutch field coil
- A/C control relay
- A/C clutch air gap

J1-J2:

J2-J5:

J6-J10:

J10-J12:

J12 Continued:

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