Diagnostic Procedure
Control circuit Inspection
1.

Connect a scantool to Data Link Connector(DLC).

2.

Disconnect Fuel Pump Relay.

3.

IG "ON"

4.

Connect red tongs of the LED volt circuit tester to battery (+) and probe of the LED volt circuit tester to "3" terminal of the fuel pump relay (E/R fuse & relay box side).

5.

Perform actuation test of the fuel pump relay using a scantool.

6.

Is LED volt circuit tester ON/OFF?

YES

Faulty fuel pump relay.

NO

Check short circuit to chassis ground between Fuel Pump Relay harness connector and ECM harness connector.

Check open circuit between Fuel Pump Relay harness connector and ECM harness connector.

Faulty ECM.

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