CHECK MAGNET CLUTCH ON SIGNAL.

1) Stop the engine and turn the A/C switch to OFF.

2) Turn the ignition switch to ON.

3) Measure the voltage between ECM connector terminal and chassis ground.

Connector & terminal

(B134) No. 10 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Check for open or short circuit in the harness between A/C relay and ECM.