A/C Signal Circuits Inspection

A/C Signal Circuit Check

Wiring Diagram:

Wiring Diagram

Circuit Description
HVAC control module outputs A/C ON signal to ECM (PCM) when A/C switch turned ON and heater blower motor turned ON.
Then compressor and condenser fan are turned ON by ECM (PCM) when engine conditions are as specified.

Step 1:

Troubleshooting