A/C Cut-Off Control Inspection

SYSTEM / OPERATIONAL INSPECTION
1. Turn the ignition switch to ON.
2. Shift the selector lever into other than P and N.
3. Turn the A/C switch and the blower 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, proceed as follows.




- Connect SSTs (NGS) to the data link connector 2 located under the driver side dashboard.
- Select the "SIMULATION TEST" function on the NGS display.
- Turn the A/C relay from OFF to ON by using the "A/C PLY' and check for the operation sound of the relay.
- If the operation sound is heard, check the following.
- ECM terminal voltage.
- Load/no load distinction signal
- Throttle position sensor TVO signal
- 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-ECM)