Test J: The Air Conditioning (A/C) Is Always On

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

Normal Operation
Under normal operation, voltage is supplied to the A/C low charge protection switch through circuit CBB27 (GN/BN). When the A/C low charge protection switch is closed (ON), voltage is sent to the dual-function pressure switch through circuit CH422 (VT). When the dual-function pressure switch is closed (ON), voltage is provided to the PCM. Ignition voltage is provided to the A/C clutch relay switch through circuit SBB13 (GY/RD). When A/C is requested, a message is sent over the MSCAN bus to the PCM. When the PCM energizes the relay, ignition voltage is supplied to the A/C clutch through circuit CH401 (VT/WH). Ground is supplied for the A/C clutch through circuit GD120 (BK/GN).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PCM
- Electronic automatic temperature control (EATC) module
- Electronic manual temperature control (EMTC) module
- A/C low charge protection switch
- A/C control relay
- A/C clutch air gap

J1-J6:

J6-J8: