Engine Control Module: Service Precautions

Precautions for Multiport Fuel Injection System or Engine Control System




- Before connecting or disconnecting any harness connector for the multiport fuel injection system or ECM: Turn ignition switch to "OFF" position.
Disconnect negative battery terminal. Otherwise, there may be damage to ECM.
- Before disconnecting pressurized fuel line from fuel pump to injectors, be sure to release fuel pressure.

- Be careful not to jar components such as ECM and mass air flow sensor.