A/C Cut-Off Control Inspection

A/C Cut-Off Control Inspection
1. Start the engine and let it idle.
2. Turn the A/C switch and the fan switch ON.
3. Fully open the throttle valve. Then 3-6 seconds after, check if the operation sound of the A/C compressor electromagnetic clutch is heard.
4. If the operation sound is not heard, do as follows.

Special Service Tool New Generation Star Tester Connected to Data Link Connector 2:

a. Connect the Special Service Tools New Generation Star (NGS) tester to the data link connector 2.




b. Select the SIMULATION TEST function on the NGS display.
c. Turn the A/C relay from OFF to ON by using the "A/C RLY" function and check for the operation sound of the relay.

5. If the operation sound is heard, check the PCM terminal voltage.
- Load/no load judgement signal
- Throttle position signal

6. If the operation sound is not heard, check the following.
- A/C relay
- Open circuit in wiring harnesses and connectors (Ignition switch - A/C relay - PCM)