DTC P0181:00 [MZR-CD 2.2]
id0102f3147300
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DTC P0181:00 |
Fuel temperature sensor circuit range/performance malfunction |
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DETECTION CONDITION
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• The PCM monitors the input signal from the fuel temperature sensor. If the difference between the fuel temperature before engine warm-up and the fuel temperature after engine warm-up is less than 1 °C {1.8 °F}, the PCM determines that there is a malfunction in fuel temperature sensor.
Diagnostic support note
• The MIL does not illuminate.
• The DTC is stored in the PCM memory.
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POSSIBLE CAUSE
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• Fuel temperature sensor connector or terminal malfunction
• Fuel temperature sensor malfunction
• PCM connector or terminal malfunction
• PCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED
• Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.
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2
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform the repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
• Connect the M-MDS to the DLC-2.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine.
• Is the PENDING CODE for this DTC present?
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Yes
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Go to the next step.
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No
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Intermittent concern exists.
Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.
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4
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INSPECT FUEL TEMPERATURE SENSOR CONNECTOR FOR POOR CONNECTION
• Switch the ignition to off.
• Disconnect the fuel temperature sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 7.
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No
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Go to the next step.
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5
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INSPECT FUEL TEMPERATURE SENSOR
• Inspect the fuel temperature sensor.
• Is there any malfunction?
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Yes
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Replace the supply pump, then go to Step 7.
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No
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Go to the next step.
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6
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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?
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Yes
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Repair or replace the terminal, then go to the next step.
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No
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Go to the next step.
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7
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VERIFY TROUBLESHOOTING OF DTC P0181:00 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine.
• Is the PENDING CODE for this DTC present?
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Yes
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Replace the PCM, then go to the next step.
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No
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Go to the next step.
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8
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
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No
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DTC troubleshooting completed.
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