A/C Signal: Testing and Inspection

A/C Cut-Off Control 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 SST (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 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 PID.

If the operation sound is not heard, inspect following:
[1] A/C relay
[2] Open or short to Ground circuit in wiring harness and connectors (Ignition switch A/C relay - PCM terminal 96)
[3] A/C related parts