P0230
DTC P0230 FUEL PUMP PRIMARY CIRCUITComponent Location:
GENERAL DESCRIPTION
The ECM 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 ECM monitors the control circuit between the fuel pump relay and the ECM. When the ignition switch is turned ON, the ECM energizes the fuel pump relay, which sends power to the fuel pump.
DTC DESCRIPTION
ECM sets DTC P0230 if the ECM detects the fuel pump relay control circuit is open, short to ground or battery.
DTC Detecting Condition:
Schematic Diagram:
MONITOR DTC STATUS
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Press F4 (DTAL) to select DTC information from the DTCs menu.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
4. Read "DTC Status" parameter.
5. Is parameter displayed "History (Not Present) fault"?
NOTE:
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.
YES - Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO - Go to next step as below
COMPONENT INSPECTION
1. With Ignition OFF, remove the fuel pump relay
2. Measure resistance between terminals 85 and 86 of the fuel pump relay (Component side)
Specification : Approx. 70 - 120 Ohms at 20 °C(68 °F)
3. Apply 12 V and a ground to 85 and 86 terminals of the fuel pump relay (Components side)
4. Check if the main relay works well when it is energized. (If the fuel pump relay works normally, a clicking sound can be heard.)
5. Does the fuel pump relay operate normally?
YES - Go to next step as below
NO - Check fuel pump relay for contamination, deterioration, or damage. Substitute with a known-good fuel pump relay and check for proper operation. If the problem is corrected, replace fuel pump relay and then go to "Verification of Vehicle Repair" procedure
POWER CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Measure the voltage between terminal 30 of the fuel pump relay connector and chassis ground.
3. Measure the voltage between terminal 85 of the fuel pump relay connector and chassis ground.
Specification : Approx. B+
4. Is voltage within the specification?
YES - Go to "Control Circuit Inspection" procedure
NO - Check for an open or short to ground in the power supply circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
CONTROL CIRCUIT INSPECTION
1. Measure the voltage between terminal 86 of the fuel pump relay connector and chassis ground.
2. Is voltage within the specification?
YES - Go to next step as below
NO - Check for open or short in control circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES - Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO - Thoroughly check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Press F4 (DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History (Not Present) fault"?
YES - System performing to specification at this time. Clear the DTC
NO - Go to the applicable troubleshooting procedure.