GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Aveo 🢒 Engine 🢒 Engine Controls and Fuel - 1.4L (LDT) 🢒 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 Descriptors

DTC P0230: Fuel Pump Relay Control Circuit

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Relay Switch B+

*

**

--

--

Relay Switch Controlled Output

*

**

***

--

Relay Coil Control

P0230

P0230

P0230

--

Relay Coil Ground

--

**

--

--

* The fuel pump fuse opens and the engine cranks but does not run.

** The engine cranks but does not run.

*** The fuel pump operates continuously and the battery will discharge.

Circuit/System Description

When you turn ON the ignition switch, the engine control module (ECM) energizes the fuel pump relay which powers the fuel pump ON. The fuel pump remains ON as long as the engine is cranking or running and the ECM receives ignition reference pulses. If there are no ignition reference pulses, the ECM shuts the fuel pump OFF within 2 seconds after the ignition was switched to the ON position or if the engine stops.

Conditions for Running the DTC
    • The ignition is ON.
    • The ignition voltage is between 11-16 volts.
    • The ECM has commanded the fuel pump relay ON and OFF at least once during the ignition cycle.
    • The above conditions are met for greater than 1 second.
    • The DTCs runs continuously once the above conditions are met.

Conditions for Setting the DTC

The ECM detects the fuel pump relay control circuit is shorted to voltage, shorted to ground, or open.

Action Taken When the DTC Sets

DTC P0230 is a Type C DTC.

Conditions for Clearing the DTC

DTC P0230 is a Type C DTC.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End 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
  1. Ignition ON, command the Fuel Pump Relay ON and OFF with a scan tool. You should hear and feel an audible click.
  2. 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
  1. Ignition OFF, disconnect the fuel pump relay.
  2. Connect a test lamp between the relay coil control circuit terminal 86 and ground.
  3. 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.
    4. ⇒If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
    ⇒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 ECM.
  4. Ignition OFF, connect a test lamp between the relay coil control circuit terminal 86 and the relay coil ground circuit terminal 85.
  5. 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.
    6. ⇒If the test lamp is always OFF, repair the ground circuit for an open/high resistance.
  6. If all circuits test normal, test or replace the fuel pump relay.

Component Testing
  1. Ignition OFF, disconnect the fuel pump relay.
  2. Test for 70-110 ohms of resistance between terminals 85 and 86.
    3. ⇒If not within the specified range, replace the relay.
  3. Test for infinite resistance between the following terminals:
    4. • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    ⇒If not within the specified range, replace the relay.
  4. Install a 20A fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms of resistance between terminals 30 and 87.
    5. ⇒If greater than the specified range, replace the relay.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for engine control module replacement, setup, and programming