DTC P0093 [WL-C, WE-C (Thailand, General (L.H.D. R.H.D.) specs.)]

id0102b0953800

DTC P0093

Fuel system leak detection
DETECTION CONDITION
•  The PCM monitors the fuel pressure in the common rail from the fuel pressure sensor while the engine is running. If the fuel pressure is lower than the preprogrammed criteria, the PCM determines that there is air or leakage in the fuel system.
POSSIBLE CAUSE
•  Fuel tank is empty or low fuel
•  Misconnection of fuel line
•  Fuel leakage or clogged fuel line
•  Supply pump malfunction
•  Fuel pressure sensor malfunction
•  Fuel injector malfunction
•  Fuel pipe improper connection on fuel tank
•  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 MIL STATUS (CONFIRM TO CUSTOMER)
•  Did the fuel warning lamp illuminate when the MIL illuminated?
Yes
If the MIL is not currently illuminated and there is sufficient fuel, erase the DTC, and troubleshooting is finished.
If the MIL is still illuminated and there is sufficient fuel, go to the next step.
No
Go to the next step.
3
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
4
VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT?
•  Connect the M-MDS to the DLC-2.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine.
•  Is the same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists.
Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.
5
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
•  Is P0192 or P0193 on FREEZE FRAME DATA?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [WL-C, WE-C (Thailand, General (L.H.D. R.H.D.) specs.)].)
No
Go to the next step.
6
INSPECT FUEL PIPE CONNECTION ON FUEL TANK
•  Inspect the fuel pipes for supply and return connection at fuel tank.
•  Are fuel pipes connected properly?
Yes
Go to the next step.
No
Reconnect fuel pipes properly, then go to Step 9.
(See FUEL TANK REMOVAL/INSTALLATION [WL-C, WE-C].)
7
INSPECT FUEL LINE
•  Turn the engine switch off.
•  Inspect for fuel leakage or clogging in the following fuel lines for each cylinder:
―  Supply pump and Common rail.
―  Common rail and fuel injector.
•   Is there any malfunction?
Yes
Repair or replace the suspected fuel line, go to Step 9.
No
Go to the next step.
8
INSPECT FUEL PRESSURE SENSOR
•  Inspect the fuel pressure sensor.
•  Is there any malfunction?
Yes
Replace the common rail, go to Step 9.
No
Go to the next step.
9
INSPECT FUEL INJECTOR
•  Inspect the fuel injector.
•  Is there any malfunction?
Yes
Replace the fuel injector, go to the next step.
(See FUEL INJECTOR REMOVAL/INSTALLATION [WL-C, WE-C].)
No
If DTC P0088 and P0093 are stored together, the possible cause could be a supply pump internal failure. Replace the supply pump, then go to the next step.
(See SUPPLY PUMP REMOVAL/INSTALLATION [WL-C, WE-C].)
Go to the next step except for the above case.
10
VERIFY TROUBLESHOOTING OF DTC P0093 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the 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 [WL-C, WE-C].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “After Repair Procedure“.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [WL-C, WE-C (Thailand, General (L.H.D. R.H.D.) specs.)].)
No
Troubleshooting completed.