Description and Diagnosis Procedure

SYSTEM: Injector Circuit

CIRCUIT DESCRIPTION



The injectors are provided to the intake manifold. They inject fuel into the cylinders based on the signals from the ECM.

DIAGNOSTIC PROCEDURE
1. CHECK VOLTAGE OF TERMINALS #10 AND #20.
- If OK proceed to step 3.
- If not OK proceed to step 2.
2. CHECK AM2 FUSE.
- If OK check for open in harness and connector between ECM and battery.
- If not OK check for short in all the harness and components connected to AM2 fuse.
3. CHECK CONTINUITY BETWEEN TERMINALS E01, E02 AND BODY GROUND.
- If OK proceed to step 4.
- If not OK repair or replace harness or connector.
4. CHECK OPERATION OF INJECTORS.
- If OK check and replace ECM.
- If not OK replace injector.