CHECK AUTO A/C CONTROL MODULE SIGNAL VOLTAGE.

1) Turn the ignition switch to ON.

2) Turn the air flow control dial and measure the voltage between auto A/C control module harness connector and chassis ground for each mode.

Connector & terminal

(i48) No. 13 (+) — Chassis ground (−):

QUESTION

Is the voltage approx. 5 V at the VENT, BI-LEVEL and HEAT positions, and approx. 0 V at the D/H and DEF positions?

Yes No