F2–136
ON-BOARD DIAGNOSTIC
DTC P0300
A6E407001082228
Diagnostic procedure
End Of Sie
DTC P0300 Random misfire detection
DETECTION
CONDITION
• PCM monitors CKP sensor input signal interval time. PCM calculates change of interval time for each
cylinder. If the interval time exceeds preprogrammed criteria, PCM determines random misfire detection.
POSSIBLE
CAUSE
• Fuel leakage or clogged in fuel line
• Fuel injector malfunction
• CKP sensor malfunction
• CMP sensor malfunction
• Inadequate engine compression
• PCM malfunction
STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related repair information available?
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No Go to next step.
2 FOLLOW OTHER DETECTED DTC FIRST
• Turn engine switch to OFF.
• Start engine.
• Has P0200 been detected?
Yes Go to DTC P0200 inspection.
(See F2–129 DTC P0200)
No Go to next step.
3 INSPECT FUEL LINE
• Turn engine switch to OFF.
• Inspect for fuel leakage or clogs in following
fuel lines for each cylinder:
— Common rail and fuel injector.
— Fuel injector and fuel tank.
• Is there any malfunction?
Yes Repair or replace suspected fuel line, go to Step 8.
No Go to next step.
4 INSPECT FUEL INJECTOR
• Inspect fuel injector.
(See F2–56 FUEL INJECTOR INSPECTION)
• Is there any malfunction?
Yes Replace fuel injector, go to Step 8.
(See F2–55 FUEL INJECTOR REMOVAL/INSTALLATION)
No Go to next step.
5 INSPECT CKP SENSOR
• Inspect CKP sensor.
(See F2–82 CRANKSHAFT POSITION (CKP)
SENSOR INSPECTION)
• Is there any malfunction?
Yes Replace CKP sensor, go to Step 8.
(See F2–81 CRANKSHAFT POSITION (CKP) SENSOR
REMOVAL/INSTALLATION)
No Go to next step.
6 INSPECT CMP SENSOR
• Inspect CMP sensor.
(See F2–80 CAMSHAFT POSITION (CMP)
SENSOR INSPECTION)
• Is there any malfunction?
Yes Replace CMP sensor, go to Step 8.
(See F2–80 CAMSHAFT POSITION (CMP) SENSOR
REMOVAL/INSTALLATION)
No Go to next step.
7 INSPECT ENGINE COMPRESSION
• Inspect engine compression.
(See B2–8 COMPRESSION INSPECTION)
• Is there any malfunction?
Yes Implement engine overhaul for repairs, go to next step.
No Go to next step.
8 VERIFY TROUBLESHOOTING OF DTC P0300
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Start engine.
• Is same DTC present?
Yes Replace PCM, go to next step.
(See F2–64 PCM REMOVAL/INSTALLATION)
No Go to next step.
9 VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
(See F2–86 AFTER REPAIR PROCEDURE)
• Is there any DTC present?
Yes Go to applicable DTC inspection.
(See F2–87 DTC TABLE)
No Troubleshooting completed.
To Next Page
Loading...
