Inspection Procedure

INSPECTION PROCEDURE

1. Check Fuel Pump Operation.





- Turn Ignition Switch ON.
- Using jumper connect terminals +B and FP of Data Link Connector 1 (SST 09843-18020).
- Check that there is pressure in the hose from the fuel filter.
- If OK proceed to step 2.
- If not OK proceed to step 3.
2. Check for open and short in harness and connector between terminals B+ to B+ and FP to FP of the Data Link Connector 1 and Fuel Pump Electronic Control Unit.
- If OK proceed to step 5.
- If not OK repair or replace harness or connector.
3. Check voltage of terminal B+ of Data Link Connector 1.





- Turn Ignition Switch ON.
- Measure voltage between terminal B+ of Data Link Connector 1 and body ground.

Voltage: 9 to 14 volts

- If OK proceed to step 4.
- If not OK check for Engine Control Module power source circuit and check for open in harness and connector between terminal B+ of Data Link Connector 1 and Main Relay.
4. Check for open and short in harness and connector between terminal FP of Data Link Connector 1, Fuel Pump and body ground.
- If OK repair or replace Fuel Pump.
- If not OK repair or replace harness or connector.
5. Check voltage between terminals 3 (FPC) and 1 (E) of Fuel Pump Electronic Control Unit connector.





- Remove the LH quarter trim panel.
- Disconnect Fuel Pump Electronic Control Unit connector.
- Measure voltage between terminals 3 (FPC) and 1 (E) of Fuel Pump Electronic Control Unit connector when ignition switch is turned to start.

Voltage: 4.5 - 5.5 volts

- If OK replace Fuel Pump Electronic Control Unit.
- If not OK proceed to step 6.
6. Check for open in harness and connector between terminal FPC of Engine Control Module and terminal FPC of Fuel Pump Electronic Control Unit, terminal E of Fuel Pump Electronic Control Unit and body ground.
- If OK proceed to step 7.
- If not OK repair or replace harness or connector.
7. Check for open and short in harness and connector between terminal DI of Engine Control Module and terminal DI of Fuel Pump Electronic Control Unit.
- If OK check and replace Engine Control Module.
- If not OK repair or replace harness or connector.