A/C Compressor Lock Sensor Circuit

CIRCUIT DESCRIPTION
This sensor sends 1 pulse a engine revolution to the ECM. If the number ratio of the compressor speed divided by the engine speed is smaller than a predetermined value, the ECM turns the compressor oft. And, the indicator flashes at about 1 second interval.

Wiring Diagram:

Step 1:

Steps 2 - 3:

INSPECTION PROCEDURE