Mazda CX-7 2007 Workshop Manual page 79

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DTC P0089[L3 WITH TC]
DTC P0089 Fuel pressure regulator performance
• If the fuel pressure average value measured by the PCM exceeds the specification when the camshaft is
rotating at a specified rate, the PCM determines that there is a fuel pressure regulator performance
problem.
Diagnostic support note
DETECTION
• This is a continuous monitor (Other).
CONDITION
• The MIL does not illuminate.
• FREEZE FRAME DATA is not available.
• DTCs are stored in the PCM memory.
• Spill valve control solenoid valve malfunction
POSSIBLE
• Connector or terminal malfunction
CAUSE
• PCM malfunction
Diagnostic procedure
STEP
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the FREEZE FRAME DATA been
recorded?
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related service Bulletins and/or on-line
repair information availability.
• Is any related repair information available?
3 INSPECT HIGH PRESSURE FUEL PUMP
CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the high pressure fuel pump
connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
4 INSPECT SPILL VALVE CONTROL SOLENOID
VALVE
• Inspect the spill valve control solenoid valve.
(See01-14-19 HIGH PRESSURE FUEL
PUMP INSPECTION[L3 WITH TC].)
• Is there any malfunction?
5 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion.)
• Is there any malfunction?
6 VERIFY TROUBLESHOOTING OF DTC P0089
COMPLETED
• Make sure to reconnect all the disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
7 VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
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ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
Yes Perform the 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.
Yes Repair or replace the terminals, then go to Step 6.
No Go to the next step.
Yes Replace the high pressure fuel pump, then go to Step 6.
(See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)
No Go to the next step.
Yes Repair the terminal, then go to the next step.
No Go to the next step.
Yes Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No DTC troubleshooting completed.
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