P0232

DTC P0232






GENERAL DESCRIPTION
The main relay supplies power to one side of the fuel pump relay coil. The other side of the fuel pump relay coil is ECM/PCM controlled. When the ignition switch is turned ON, the ECM/PCM energizes the fuel pump relay. The ECM/PCM monitors the fuel pump relay control circuit for malfunctions.

DTC DESCRIPTION
If there is Short to battery in fuel pump circuit, ECM/PCM sets DTC P0232.

DTC Detecting Condition:

SPECIFICATION
Item Specification
Coil Resistance 70 - 120 ohms

Schematic Diagram - A/T:

Schematic Diagram - M/T:

MONITOR SCANTOOL DATA
1. Connect scantool to Data Link Connector(DLC).
2. Engine start.




3. Monitor the "Fuel pump relay" parameters on the scantool.
4. Are the parameters displayed correctly ?

YES - Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or weather proofed and ECM/PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.

NO - Go to "Terminal and Connector Inspection" procedure.

TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness 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 - Go to "Fuel pump relay circuit inspection" procedure.

FUEL PUMP RELAY CIRCUIT INSPECTION
1. Key "OFF".
2. Disconnect fuel pump relay.
3. Key "ON".




4. Measure the voltage between terminal 5 of fuel pump relay harness connector and chassis ground.

Specification : Approx. 3.5 V

5. Is the measured voltage within specifications?

YES - Go to "Component inspection" procedure.

NO - Repair Open in control circuit, and go to "Verification of vehicle Repair" procedure.

COMPONENT INSPECTION
1. Fuel pump relay check.
a. Key "OFF".
b. Disconnect fuel pump relay.
c. Measure the resistance between terminal 1 and 2 of fuel pump relay component side.

Specification:

d. Measure the resistance between terminal 3 and 5 of fuel pump relay component side.
e. Is the measured resistance within specification?

YES
- Substitute with a known - good ECM/PCM and check for proper operation.
- If the problem is corrected, replace ECM/PCM and go to "Verification of Vehicle Repair" procedure.

NO
- Substitute with a known - good Fuel pump relay and check for proper operation.
- If the problem is corrected, replace Fuel pump relay 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. Clear the DTCs and Operate the vehicle within DTC Enable conditions in General information.
3. Are any DTCs present ?

YES - Go to the applicable troubleshooting procedure.

NO - System is performing to specification at this time.