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".

4. Fully open the throttle valve and verify that the A/C compressor magnetic clutch does not actuate for 2 - 5 seconds.
- If it actuates, inspect as follows.




1. Connect the SSTs (NGS tester) to DLC-2.
2. Turn the A/C switch off.
3. Turn the ignition switch on.
4. Select the SIMULATION TEST function on the NGS display.
5. Select ignition 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 PID.
- If the operation sound is not heard, inspect following:
1. A/C relay
2. Open or short to GND circuit in wiring harness and connectors (Ignition switch - A/C relay - PCM terminal 96)
3. A/C related parts