Manual A/C
Inspection of ECM (PCM) and Its CircuitsCAUTION:
ECM (PCM) cannot be checked by itself.
It is strictly prohibited to connect voltmeter or ohmmeter to ECM (PCM) with
couplers disconnected from it.
ECM (PCM. and its circuits can be checked at ECM (PCM) wiring couplers by measuring voltage.
Voltage Check
1. Remove ECM (PCM) from vehicle.
2. Connect ECM (PCM) couplers to ECM (PCM).
3. Check each terminal voltage with couplers connected.
Refer to ECM (PCM) Voltage Values Table for Relation of A/C Control.
Wiring Diagram:
A/C system wiring circuit diagram
Ter. E61-16 - C51-3-18:
ECM (PCM) Voltage Values Table for Relation of A/C Control