Toyota 1 MZ–FE Manual page 485

INSPECTION PROCEDURE
Are there any other codes (besides DTC P0136) being output?
Check for open and short in harness and connector between ECM
and heated oxygen sensor (See page IN–31).
Check the output voltage of heated oxygen sensor (bank 1 sensor 2).
Replace heated oxygen sensor.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Go to relevant diagnostic trouble code
YES
chart.
Repair or replace harness or connector.
(1) Remove the fuse cover on the instrument
panel.
(2) Connect the OBDII scan tool or TOYOTA
hand–held tester to the DLC 3.
(3) After warming up the engine, race the engine
at 2,500 rpm for 3 mins.
Read the output voltage of heated oxygen sensor
(bank 1 sensor 2) when racing the engine after 3
mins. have elapsed.
Heated oxygen sensor output voltage:
Alternates from 0.4 V or less to 0,5 V or
more.
Check that each connector is properly
connected.
EG2–485