Component Location
General Description

The PCM provides ground to one side of the coil in the fuel pump relay to control the fuel pump relay. The other side of the fuel pump relay coil is connected to fuel pump relay, which activates when the ignition switch is ON. The PCM monitors the control circuit between the fuel pump relay and the ECM. When the ignition switch is turned ON, the PCM energizes the fuel pump relay, which sends power to the fuel pump.

DTC Description

If there is Short to ground in fuel pump circuit, PCM sets DTC P0231.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

● Circuit continuity check, low

● Poor connection

● Short to ground in control circuit

● Fuel pump relay

Enable Conditions

Threshold Value

● Short circuit to Ground

Diagnostic Time

● DTC only

Specification

Coil Resistance

70Ω ~ 120Ω

Schematic Diagram
note
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