System Inspection

SYSTEM INSPECTION
1. Position the vehicle on a chassis roller and start the engine.
2. Shift the selector lever into other than P and N.
3. Turn the A/C switch and the fan 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, do as follows.

SST-NGS:

(1) Connect the Special Service Tool-New Generation Star Tester (SST-NGS).
(2) Select the SIMULATION TEST function on the NGS display.
(3) Turn the A/C relay from OFF to ON by using the "A/C RLY" and check for the operation sound of the relay.
I. If the operation sound is heard, check the following.
^ PCM terminal voltage
^ Load/no load distinction signal
^ Closed throttle position signal
II. If the operation sound is not heard, check the following.
^ A/C relay
^ Open circuit in wiring harnesses and connector (Main relay - A/C relay - PCM)