Inspection of ECM and Its Circuits: Notes
Reference: PRECAUTIONS FOR ECM CIRCUIT INSPECTION
NOTE:
- The connectors of the ECM are watertight. If tester probes are directly connected to any of the connectors when checking the ECM and its circuits, the watertight performance of the connector will be affected, possibly resulting in corrosion of connector terminals and damage to electrical circuits.
Always use the special tool when checking the ECM and its circuits. Connect tester probes only to the special tool's connectors.
- If you connect a voltmeter or ohmmeter directly to control module terminals by removing control module connectors, you can damage the control module. Never connect a voltmeter or an ohmmeter directly to any terminal of control module by disconnecting control module connectors.