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 Relay Control CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Battery Voltage - Relay Switch Side | ¹ | ² | -- | -- |
Fuel Pump Supply Voltage | ¹ | ² | ³ | -- |
Fuel Pump Relay Control | P0230 | P0230 | P0230 | -- |
Fuel Pump Relay Ground | -- | P0230 | -- | -- |
Fuel Pump Ground | -- | ² | -- | -- |
¹Blown fuel pump fuse, cranks no start ²Cranks, no start ³Fuel pump operates continuously, then discharged battery | ||||
Circuit/System Description
The control module enables the fuel pump relay when the ignition switch is turned ON. The control module will disable the fuel pump relay within 2 seconds unless the control module detects ignition reference pulses. The control module continues to enable the fuel pump relay as long as ignition reference pulses are detected. The control module disables the fuel pump relay within 2 seconds if ignition reference pulses cease to be detected and the ignition remains ON.
The control module monitors the voltage on the fuel pump relay control circuit. If the control module detects an incorrect voltage on the fuel pump relay control circuit, a fuel pump relay control DTC sets.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The system voltage is between 9-18 volts. |
| • | DTC P0230 runs continuously when the above conditions 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 MIL/DTC
DTC P0230 is a Type B DTC
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
J 43244 Relay Puller Pliers
Circuit/System Verification
Note: An open or a short to voltage in the control circuit will cause both the Ckt. Open Test Status and the Ckt. Short Volts Test Status parameters to display Fault.
| • | Ignition ON, command the fuel pump relay ON and OFF with a scan tool while observing the following control circuit status parameters: |
| - | Fuel Pump Relay Ckt. Short Gnd Test Status |
| - | Fuel Pump Relay Ckt. Open Test Status |
| - | Fuel Pump Relay Ckt. Short Volts Test Status |
| • | Each parameter should toggle between OK and Not Run or Not Run and OK. |
Circuit/System Testing
- With the ignition OFF, remove the fuel pump relay from the rear electrical center using the J 43244 Puller Pliers .
- With the ignition ON, engine OFF, probe control circuit terminal 3 of the fuel pump relay with a test lamp that is connected to a ground. Command the fuel pump relay ON and OFF with a scan tool. The test lamp should turn ON and OFF with each command.
- Connect a test lamp between control circuit terminal 3 of the fuel pump relay and ground circuit terminal 4 of the fuel pump relay. Command the fuel pump relay ON and OFF with a scan tool.
| ⇒ | If the test lamp does not turn ON and OFF, test for an open or a short to ground in the fuel pump relay control circuit or an intermittent or a poor connection at the engine control module (ECM). If the circuit tests normal, replace the control module. |
| ⇒ | If the test lamp remains illuminated with each command, test for a short to voltage in the control circuit of the fuel pump relay or an intermittent or a poor connection at the ECM. If the circuit tests normal, replace the control module. |
| ⇒ | If the test lamp does not turn ON and OFF, repair the open or the high resistance in the ground circuit of the fuel pump relay. |
| ⇒ | If the test lamp does turn ON and OFF, test for an intermittent and for a poor connection at the fuel pump relay, or a faulty fuel pump relay. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ECM replacement, setup, and programming |
