Inspection of ECM (PCM) And Its Circuits: Notes

WARNING: This page is about a different car, the 2003 Suzuki XL-7 and 2003 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: 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.