Air–Fuel Ratio Lean Malfunction - Toyota 22R-E Service Manual

DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN (Cont'd)
Purpose of the driving pattern.
(a) To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded.
(b) To check that the malfunction is corrected when the repair is completed confirming that diagnostic
trouble code is no longer detected.
DTC
Malfunction: Open or Short in Oxygen Sensor
(1) Disconnect the fuse EFI (15 A) for 10 sec. or more, with IG switch OFF.
(2) Start the engine and warm the engine up.
(3) After the engine is warmed up, let it idle for 2 min.
(4) After performing the idling in (3), perform sudden racing to 4,000 rpm three times.
(5) After performing the sudden racing in (4), perform racing at 2,000 rpm for 2 min.
(6) After performing the racing in (5), turn the IG switch OFF for 10 sec.
(7) Start the engine and perform steps (2), (3), (4) and (5) again:
HINT: 1f a malfunction is detected, the Malfunction Indicator Lamp will light up during step.
NOTICE: If this procedure is not strictly followed, you can not detect the malfunctions.
ENGINE –
Air–Fuel Ratio Lean Malfunction
MFI SYSTEM
EG1–117