P008B

P008B LOW FUEL PRESSURE CONTROL SYSTEM





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine and keep the engine speed at idle for 60 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK FUEL PUMP CONTROL MODULE (FPCM) SIGNAL
P1220.
Is the inspection result normal?
YES - GO TO 2.
NO - Replace FPCM. Service and Repair.
2.CHECK FUEL PUMP CONTROL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect FPCM harness connector and fuel level sensor unit and fuel pump (main) harness connector.
3. Check the continuity between FPCM harness connector and fuel level sensor unit and fuel pump (main) harness connector.





4. Also check harness for short to ground and short to power.
Is inspection result normal?
YES - Replace fuel level sensor unit and fuel pump (main) (fuel pressure regulator malfunction). Removal and Installation
NO - Repair or replace error-detected parts.