DTC P0254:00 [MZ-CD 1.6]

id0102g8512500

DTC P0254:00

Fuel metering valve control circuit high input

DETECTION CONDITION

•  The PCM monitors the fuel metering valve. If the voltage at PCM terminal 2AN remains high, the PCM determines that the fuel metering valve control circuit has a malfunction.

POSSIBLE CAUSE

•  Fuel metering valve connector or terminal malfunction

•  Short to power supply in the wiring harness between fuel metering valve terminal A and PCM terminal 2AN

•  Fuel metering valve malfunction

•  PCM connector or terminal malfunction

•  PCM malfunction

DTC P0254:00	Fuel metering valve control circuit high input
DETECTION CONDITION	• The PCM monitors the fuel metering valve. If the voltage at PCM terminal 2AN remains high, the PCM determines that the fuel metering valve control circuit has a malfunction.
POSSIBLE CAUSE	• Fuel metering valve connector or terminal malfunction • Short to power supply in the wiring harness between fuel metering valve terminal A and PCM terminal 2AN • Fuel metering valve malfunction • PCM connector or terminal malfunction • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		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.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition to ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6].) • Is the other PENDING CODE/DTC also present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
3		No	Go to the next step.
4	INSPECT FUEL METERING VALVE CONNECTOR FOR POOR CONNECTION • Switch the ignition to 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.
4		No	Go to the next step.
5	INSPECT FUEL METERING VALVE CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY • Disconnect the fuel metering valve connector. • Switch the ignition to ON (engine off). • Measure the voltage at the fuel metering valve terminal A (wiring harness-side). • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8.
5		No	Go to the next step.
6	INSPECT FUEL METERING VALVE • Inspect the fuel metering valve. • Is there any malfunction?	Yes	Replace the fuel metering valve, then go to Step 8. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZ-CD 1.6].)
6		No	Go to the next step.
7	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Switch the ignition to 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 the next step.
7		No	Go to the next step.
8	VERIFY THAT DTC P0254:00 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) Go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
9		No	DTC troubleshooting completed.