DTC P0253 [MZ-CD 1.6 (Y6)]

B3E010200200W15

DTC P0253

Fuel metering valve control circuit low input

DETECTION CONDITION

• The fuel metering valve short to ground.

POSSIBLE CAUSE

• Fuel metering valve malfunction
• Connector or terminal malfunction
• Short to ground in wiring harness between fuel metering valve terminal B and PCM terminal 212
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the "INTERMITTENT CONCERNS TROUBLESHOOTING".
4
INSPECT FUEL METERING VALVE CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect the fuel metering valve connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 8.
No
Go to the next step.
5
INSPECT FUEL METERING VALVE
• Inspect the fuel metering valve.
• Is there any malfunction?
Yes
Replace the fuel pump, then go to Step 8.
No
Go to the next step.
6
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 8.
No
Go to the next step.
7
INSPECT FUEL METERING VALVE CONTROL CIRCUIT FOR SHORT TO GROUND
• Turn the engine switch off.
• Inspect for continuity between fuel metering valve terminal B (wiring harness-side) and body ground.
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 8.
No
Go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0253 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.