| Mazda P1181 | Fuel delivery system-high |
|---|---|
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DETECTION CONDITION
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• Faults for checks in PCV controlled mode – Maximum rail pressure exceeded
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POSSIBLE CAUSE
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• Fuel metering control valve malfunction.
• Fuel pressure sensor characteristic malfunction
• Fuel pressure limiter malfunction
• Fuel injector clogged
• Fuel return line clogged
• PCM malfunction
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Diagnostic procedure
| STEP | INSPECTION | ACTION | |
|---|---|---|---|
|
1
|
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
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Yes
|
Go to the next step.
|
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No
|
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
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||
|
2
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VERIFY 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.
|
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No
|
Go to the next step.
|
||
|
3
|
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P1181 on FREEZE FRAME DATA?.
|
Yes
|
Go to the next step.
|
|
No
|
Go to the troubleshooting procedures for the DTC in FREEZE FRAME DATA.
|
||
|
4
|
INSPECT FUEL RETURN LINE FOR CLOGGING
• Inspect the fuel return line between fuel injector and fuel tank.
• Is there any fuel clogging in return line?.
|
Yes
|
Repair or replace the malfunctioning part, then go to Step 8.
|
|
No
|
Go to the next step.
|
||
|
5
|
INSPECT FUEL METERING CONTROL VALVE
• Inspect the fuel metering control valve.
• Is there any malfunction?
|
Yes
|
Replace the fuel supply pump, then go to Step 8.
|
|
No
|
Go to the next step.
|
||
|
6
|
INSPECT FUEL PRESSURE SENSOR
• Inspect fuel pressure sensor.
• Is there any malfunction?
|
Yes
|
Replace the common rail, then go to Step 8.
|
|
No
|
Go to next step.
|
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|
7
|
INSPECT FUEL INJECTOR
• Inspect the fuel injector.
• Is there any malfunction?
|
Yes
|
Replace the fuel injector, then go to the next step.
|
|
No
|
Inspect the following:
• Fuel supply pump
• Fuel pressure limiter
If malfunction is appeared, replace the suspected part.
Then go to the next step.
If it is normal, go to the next step.
|
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|
8
|
VERIFY THAT DTC P1181 TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine and warm-up to normal operating temperature.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Retrieve the DTC using the M-MDS.
• Is the PENDING CODE for this DTC present?
|
Yes
|
Replace the PCM, then go to the next step.
|
|
No
|
Go to the next step.
|
||
|
9
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VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
|
|
No
|
DTC troubleshooting completed.
|
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