A/C Cut-Off Control Inspection

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. (Refer to POWERTRAIN CONTROL MODULE (PCM) INSPECTION.)

Testing and Inspection

- 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)