Diagnostic Aids

Perform this test when instructed during QUICK TEST or if directed by other test procedures. This test is used to diagnose the following:

• Fuel pump relay.
• Inertia Fuel Shutoff (IFS) switch.
• Wiring harness circuits (B+, FUEL PUMP, FPM, POWER-TO-PUMP and VPWR).
• Powertrain Control Module (PCM).