Description and Diagnostic Chart

SYSTEM: Fuel Injector Driver

CIRCUIT DESCRIPTION



The injectors are located in the intake manifold. They inject fuel into the cylinders based on the signals from the engine control module (ECM).

DIAGNOSTIC CHART
1. CHECK VOLTAGE BETWEEN TERMINALS #10 - 60 OF ECM AND BODY GROUND.
^ If OK go to step 4.
^ If not OK go to step 2.
2. CHECK AM2 FUSE.
^ If OK go to step 3.
^ If not OK check for short in the harness and all the components connected to AM2 fuse.
3. CHECK RESISTANCE OF SOLENOID RESISTOR.
^ If OK check and repair harness and connector between ECM and battery.
^ If not OK replace solenoid resistor.
4. CHECK CONTINUITY BETWEEN TERMINALS E01, E02 AND BODY GROUND.
^ If OK go to step 5.
^ If not OK repair or replace harness or connector.
5. CHECK OPERATION FOR INJECTORS.
^ If OK check and replace ECM.
^ If not OK replace injector.