A/C Cut-Off Control System

1. Position the vehicle on a chassis roller and start the engine.
2. Shift the selector lever into other than P and N.
3. Turn the A/C switch and the fan switch on.
4. Fully open the throttle valve. Then, 3-6 seconds after, check if the operation sound of the A/C compressor electromagnetic clutch is heard.
5. If the operation sound is not heard, do as follows.
(1) Turn the ignition switch ON.
(2) Turn the A/C relay from OFF to ON by connecting a jumper wire between LG/Y terminal of A/C relay connector and ground, and check for the operation sound of the relay.
(3) If the operation sound is heard, check the PCM terminal voltage.
- Load/no load distinction signal
- Closed throttle position signal
(4) If the operation sound is not heard, check the following.
- A/C relay
- Open circuit in wiring harnesses and connector (Main relay - A/C relay - PCM)