J10 - Does Engine Start

Diagnostic Trouble Code (DTC) 542 indicates that one of the following has occurred:

No Start:

- Inertia Fuel Shutoff (IFS) switch not reset or electrically open (if in secondary circuit).

- Open circuit between the fuel pump and Fuel Pump Monitor (FPM) circuit connection to the power-to-pump circuit.

- Poor fuel pump ground.

- Fuel pump electrically open.

Engine Starts:

- Fuel pump secondary circuit short to power.

- Fuel pump relay contacts always closed.

- Open in FPM circuit between Powertrain Control Module (PCM) and connection to the power-to-pump circuit.

- Left/front Heated Oxygen Sensor (HO2S) short to power

- Damaged Powertrain Control Module (PCM).

- Does the engine start?

Yes -- Go to J11. J11 - Verify That Fuel Pump Is Off

No -- Go to J15. J15 - Check Inertia Fuel Shutoff (IFS) Switch