Spark

DTC P0230

The engine control module (ECM) provides a voltage to the coil side of the fuel pump relay. When the ignition switch is first turned ON, the ECM energises the fuel pump relay, which applies power to the fuel pump. The ECM enables the fuel pump relay as long as the engine is cranking or running, and crankshaft reference pulses are detected. If no crankshaft reference pulses are detected, the ECM turns OFF the fuel pump relay after about 3 s.

The ECM detects a short circuit to voltage, a short circuit to ground, or an open circuit on the fuel pump relay control circuit.

DTC P0230 is a Type C DTC.

DTC P0230 is a Type C DTC.

Schematic Reference

Engine Controls Schematics : Siemens ECM - LPG with LCP → Siemens ECM - Gas without FX3 or LCP → Delphi ECM - FX3

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, command the Fuel Pump Relay ON and OFF with a scan tool. You should hear the relay click when commanded ON and OFF.
2. Observe the fuel pump relay control circuit test status parameters. Each of the fuel pump relay control circuit test status parameters should display OK or Not Run.
3. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.

1. Ignition OFF, disconnect the KR23A fuel pump relay.
2. Ignition OFF, test for less than 5 Ω between the relay coil ground circuit terminal 86 and ground.

⇒	If greater than the specified range, repair the ground circuit for an open/high resistance.

3. Connect a test lamp between the relay coil control circuit terminal 85 and ground.
4. Ignition ON, command the fuel pump ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 engine control module.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 engine control module.

5. If all circuits test normal, test or replace the KR23A fuel pump relay.

1. Ignition OFF, disconnect the KR23A fuel pump relay.
2. Measure for 70-110 Ω between terminals 85 and 86 of the KR23A fuel pump relay.

⇒	If the resistance is not within the specified range, replace the KR23A fuel pump relay.

3. Measure for infinite resistance between following terminals of the KR23A fuel pump relay:

•	Terminals 30 and 86

•	Terminals 30 and 87

•	Terminals 30 and 85

•	Terminals 85 and 87

⇒	If continuity is detected, replace the KR23A fuel pump relay.

4. Connect a 20A fused jumper wire from the positive terminal of the battery to the appropriate KR23A fuel pump relay terminal 85 and B+. Connect a jumper wire from the negative terminal of the battery to KR23A fuel pump relay terminal 86. Measure for less than 5Ω between KR23A fuel pump relay terminal 30 and terminal 87.

⇒	If the resistance measures more than 5Ω, replace the KR23A fuel pump relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming