P0090

P0087, P0088, P0090 FRP CONTROL SYSTEM





DTC Logic

DTC DETECTION LOGIC

NOTE:
- If DTC P0087 or P0090 is displayed with DTC P1197, first perform the trouble diagnosis for DTC
P1197.
- DTC P0087 or P0090 may be displayed when running out of gas.






DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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-I
1. Check that the fuel tank is 1/8 full of fuel.
2. Warm up the engine to the normal operating temperature and keep the engine speed at idle for 10 seconds.

NOTE:
Warm up the engine until "COOLAN TEMP/S" on "DATA MONITOR" of CONSULT-III reaches at leasC (158�F).
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Cool the engine until the engine coolant temperature reaches 60�C (140�F) or less.
2. Start the engine and wait at least 40 seconds.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK LOW FUEL PRESSURE
WITH CONSULT-III
1. Start the engine.
2. Check "L/FUEL PRES SEN V" in "DATA MONITOR" of "ECM" with CONSULT-III.





WITHOUT CONSULT-III
1. Start the engine.
2. Check low fuel pressure sensor signal voltage.





Is inspection result normal?
YES - GO TO 2.
NO - Check low fuel pressure system. Low Pressure Fuel Pump.
2.PERFORM THE HIGH PRESSURE FUEL PUMP COMPONENT INSPECTION
Perform the high pressure fuel pump component inspection. SEE Component Inspection.
Is inspection result normal?
YES - GO TO 3.
NO - Replace the fuel pump.
3.CHECK FUEL LEAKAGE
1. Start the engine.
2. Visually check that the fuel pump, fuel rail, and fuel piping have no fuel leakage.
Is inspection result normal?
YES - Check that the fuel system has no breakage, bend, and crush.
NO - Repair or Replace the error-detected parts.




Component Inspection
1.CHECK HIGH PRESSURE FUEL PUMP-I
1. Turn ignition switch OFF.
2. Disconnect high pressure fuel pump harness connector.
3. Check the resistance between high pressure fuel pump terminals as follows.





Is the inspection result normal?
YES - GO TO 2.
NO - Replace high pressure fuel pump.
2.CHECK HIGH PRESSURE FUEL PUMP-II
WITH CONSULT-III
1. Reconnect high pressure fuel pump harness connector.
2. Start the engine.
3. Check "FUEL PRES SEN" in "DATA MONITOR" of "ECM" with CONSULT-III.





WITHOUT CONSULT-III
1. Start the engine.
2. Check fuel rail pressure sensor signal voltage.





YES - INSPECTION END
NO - Replace high pressure fuel pump.