Service Information

Captiva

DTC P0230

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0230: Fuel Pump Control Output Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Fuel Pump Enable	P0230	P0230	P0230	-

The engine control module (ECM) provides ignition voltage to the fuel pump flow control module whenever the engine is cranking or running. The control module enables the fuel pump flow control module as long as the engine is cranking or running, and ignition system reference pulses are received. While this enable voltage is being received, the fuel pump flow control module supplies a varying voltage to the in-tank fuel pump module in order to maintain the desired fuel line pressure.

Conditions for Running the DTC

•	The engine speed is greater than 0 RPM.

•	The ignition voltage is between 11-18 V.

•	The DTCs run continuously when the conditions above are met.

Conditions for Setting the DTC

•	The control module detects that the commanded state of the driver and the actual state of the control circuit do not match.

•	The above condition is met for a minimum of 2.5 seconds.

Action Taken When the DTC Sets

DTC P0230 is a Type B DTC.

Conditions for Clearing the DTC

DTC P0230 is a Type B DTC.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

•	Component Connector End Views

•	Electrical Centre Identification Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Attempt to start the engine. Observe the DTC information with a scan tool. DTC P0230 should not set.
Ignition ON, command the Fuel Pump Enable ON and OFF with a scan tool while observing the following control circuit status parameters:

•	Fuel Pump Enable Circuit Low Voltage Test Status

•	Fuel Pump Enable Circuit Open Test Status

•	Fuel Pump Enable Circuit High Voltage Test Status

Each parameter should toggle between OK and Not Run or Not Run and OK.

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.

Circuit/System Testing

Ignition OFF, disconnect the K27 fuel pump control module harness connector.
Ignition OFF, and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for 0 V on the enable circuit terminal 13 of the fuel pump control module.

⇒	If greater than the specified value, test for a short to voltage on the enable circuit. If the circuit/connections test normal, replace the K20 ECM.

Ignition ON, command the Fuel Pump Enable ON with a scan tool. Test for B+ on the enable circuit terminal 13 of the fuel pump control module.

⇒	If less than the specified range, test for a short to ground or an open/high resistance on the enable circuit. If the circuit/connections test normal, replace the K20 ECM.

Ignition ON, test for 2-3 V on the enable circuit terminal 13 of the fuel pump control module.

⇒	If not within the specified range, replace the K20 ECM.

If all circuits/connections test normal, replace the K27 fuel pump control module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM or fuel pump control module replacement, setup, and programming