DTC P1281:00 [MZR-CD 2.2]
id0102f3149000
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DTC P1281:00 |
Common rail pressure higher than desired (engine running) |
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DETECTION CONDITION
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• The PCM monitors the common rail pressure using the fuel pressure sensor built in the common rail when the engine speed more than 500 rpm. The actual fuel pressure is higher than 250 MPa {2,549 kgf/cm2, 36,260 psi} or calculated pressure based on engine speed, the PCM determines that the common rail pressure higher than desired value.
MONITORING CONDITIONS
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• The DTC is stored in the PCM memory.
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POSSIBLE CAUSE
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• Fuel pressure limiter (built-in common rail) malfunction
• Suction control valve (built-in supply pump) 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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IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)
• Perform the Freeze Frame PID Data Access Procedure.
• Is the DTC P1281:00 on FREEZE FRAME DATA (Mode 2)?
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Yes
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Go to the next step.
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No
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Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2).
(See DTC TABLE [MZR-CD 2.2].)
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2
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VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA (Mode 2)/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 (Mode 2)/snapshot data on the repair order, then go to the next step.
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3
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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 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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4
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VERIFY FUEL PRESSURE AT COMMON RAIL
• Access the FRP PID using the M-MDS.
• Start the engine.
• Does the FRP PID value indicate below fuel pressure limiter opening pressure?
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Yes
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Go to the next step.
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No
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Replace the common rail, then go to Step 6.
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5
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INSPECT SUCTION CONTROL VALVE
• Inspect the suction control valve.
• Is there any malfunction?
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Yes
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Replace the supply pump, then go to the next step.
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No
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Go to the next step.
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6
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VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine.
• Perform the KOER self test.
• 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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7
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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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