A/C Signal: Testing and Inspection

1. Start the engine.
2. Turn the A/C switch and fan switch on.

3. Verify that the A/C compressor magnetic clutch actuates.
- If it does not actuate, go to symptom troubleshooting "No.23 A/C does not work sufficiently".

NOTE: A/C cut-off control period is 2 - 5 seconds.

4. Fully open the throttle valve at short time and verify that the A/C compressor magnetic clutch does not actuate.
- If it actuates, inspect the following




1. Connect the SSTs (NGS tester) to the DLC-2.
2. Turn the A/C switch off.
3. Turn the ignition key to ON (Engine OFF).
4. Select the SIMULATION TEST function on the NGS display.
5. Select IG ON TEST mode.
6. Select A/C RLY PID
7. Press START.

8. Turn the A/C relay from off to on and inspect if the operation sound of the relay is heard.
- If the operation sound is heard, inspect TP V Pin
- If the operation sound is not heard, inspect following.
- A/C relay
- Open or short to GND circuit in wiring harness and connectors (Ignition switch-A/C relay-PCM terminal 69)
- A/C related parts