Work Flow

DETAILED FLOW
1. REVIEW CUSTOMER COMPLAINT
Review customer complaint. Try to obtain detailed information about the conditions when the symptom occurs.
>> GO TO 2
2. VERIFY THE SYMPTOM
Verify the symptom by performing an operational check. Refer to WW"System Description".
>> GO TO 3
3.PERFORM TROUBLE DIAGNOSIS BY SYMPTOM
Diagnose the vehicle by performing the appropriate trouble diagnosis. Refer to WW "Symptom Table".
>> GO TO 4
4. REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace the specific parts.
>> GO TO 5
5. FINAL CHECK
Perform a final inspection of the system.
Is the inspection result normal?
YES >> Inspection End.
NO >> GO TO 2.
DTC/CIRCUIT DIAGNOSIS

Description Diagnosis Procedure 1. CHECK FUSES Check that the following fuses are not blown. Is the f ...
Power supply and ground circuit
Diagnosis Procedure
1.CHECK GROUND CONNECTION
Turn ignition switch OFF.
Check ground connection E. Refer to Ground Inspection in GI, "Circuit
Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace ground connection.
2.CHECK ECM G ...
P1148 closed loop control
DTC Logic
DTC DETECTION LOGIC
NOTE:
DTC P1148 is displayed with DTC for A/F sensor 1.
When the DTC is detected, perform the trouble diagnosis of DTC corresponding to
A/F sensor 1.
DTC No.
Trouble diagnosis
(Trouble diagnosis content)
DTC detecting condition
Possible cause ...