Component Function Check
1.CHECK FUEL PUMP FUNCTION
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON.
Is the inspection result normal? YES >> INSPECTION END
NO >> Proceed to EC-453, "Diagnosis Procedure".
Diagnosis Procedure
1.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-1
Is the inspection result normal? YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-2
Is the inspection result normal? YES >> GO TO 8.
NO >> Repair or replace error-detected parts.
3.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-3
Is the inspection result normal? YES >> GO TO 6.
NO >> GO TO 4.
4.CHECK FUSE
Is the inspection result normal? YES >> GO TO 5.
NO >> Replace 15A fuse.
5.CHECK FUEL PUMP POWER SUPPLY CIRCUIT-4
Is the inspection result normal? YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
6.CHECK FUEL PUMP GROUND CIRCUIT
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair or replace error-detected parts.
7.CHECK FUEL PUMP
Check fuel pump. Refer to EC-455, "Component Inspection (Fuel Pump)".
Is the inspection result normal? YES >> GO TO 8.
NO >> Replace fuel filter and fuel pump. Refer to FL-6, "Exploded View".
8.CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to GI-39, "Intermittent Incident".
Is the inspection result normal? YES >> Replace IPDM E/R. Refer to PCS-30, "Removal and Installation" (With intelligent key) or PCS-58, "Removal and Installation" (Without intelligent key).
NO >> Repair or replace error-detected parts.
Component Inspection (Fuel Pump)
1.CHECK FUEL PUMP
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace fuel filter and fuel pump. Refer to FL-6, "Removal and Installation".
Preparation
Special service tool
The actual shape of the tools may differ from those illustrated here.
HFC-134a (r-134a) service tool and equipmen.T.
Do not mix HFC-134a (R-134a) refrigerant and/or its specified oil with CFC-12
(R-12) refrigerant and/or its oil.
Separate and non-interchangeable se ...
General Precautions
Always use a 12 volt battery as power source.
Do not attempt to disconnect battery cables while engine is
running.
Before connecting or disconnecting the ECM harness connector,
turn ignition switch OFF and disconnect negative battery
cable. Failure to do so may damage the ECM because
...
P0139 HO2S2
DTC Logic
DTC DETECTION LOGIC
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen
storage capacity of the three way catalyst 1 causes the longer
switching time. To judge the malfunctions of heated oxygen sensor
2, ...