CHECK THE POWER SUPPLY OF THE AUTO A/C CONTROL MODULE.

1) Turn the ignition switch to ON.

2) Set the air flow control dial to the VENT position.

3) Press the defroster switch and measure the voltage between the auto A/C control module and the chassis ground when switching from VENT to DEF.

Connector & terminal

(i49) No. 9 (+) — Chassis ground (−):

QUESTION

Is the voltage 12 V or more?

Yes No

Replace the auto A/C control module.