DTC P0089 [MZR-CD (RF Turbo)]

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DTC P0089

Fuel pressure regulator performance
DETECTION CONDITION
•  The PCM monitors the fuel pressure in the common rail from the fuel pressure sensor while the engine running. If the fuel pressure drops before it reaches the fuel pressure limiter regulating pressure while supply pump and suction pump fail-safe function, the PCM determines that the fuel pressure limiter regulating performance problem.
Diagnostic support note
•  The MIL does not illuminate.
•  The FREEZE FRAME DATA is not available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Fuel pressure limiter malfunction
•  Fuel leakage between supply pump and fuel injector through common rail
•  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
•  Check for related service repair information availability?
Yes
Perform repair or diagnosis according to available repair information.
•  If vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY OTHER STORED DTCs
•  Connect the M-MDS to the DLC-2.
•  Turn the engine switch to the ON position.
•  Retrieve the stored DTC.
•  Is the DTC P0093 displayed?
Yes
Go to troubleshooting procedures for DTC P0093.
(See DTC TABLE [MZR-CD (RF Turbo)].)
No
Go to the next step.
4
INSPECT FUEL LINE FOR LEAKAGE
•  Start the engine.
•  Disconnect the suction control valve connector.
•  Verify that the fuel leakage between supply pump and fuel injector.
•  Is there any fuel leakage?
Yes
Repair or replace for fuel leakage, then go to the Step 6.
No
Go to the next step.
5
INSPECT FUEL PRESSURE LIMITER REGULATING PRESSURE
•  Access FRP PID using the M-MDS.
•  Start the engine and run it at idle.
•  Disconnect the suction control valve connector.
•  Monitor the FRP PID.
•  Does the FRP PID indicate less than 112 MPa {1,142 kgf/cm2, 16,244 psi}?
Yes
Go to the next step.
No
Replace the common rail, then go to the next step.
6
VERIFY TROUBLESHOOTING OF DTC P0089 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Turn the engine switch to the ON position (engine off).
•  Clear the DTC from PCM memory using the M-MDS.
•  Start the engine.
•  Is the same DTC present?
Yes
Replace the PCM, go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Is any DTCs present?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [MZR-CD (RF Turbo)].)
No
Troubleshooting completed.