Toyota 1 MZ–FE Manual page 483

INSPECTION PROCEDURE
Check voltage between terminals HTR, HTS, HTL of ECM
connector and body ground.
Check resistance of heated oxygen sensor heater.
Check and repair harness or connector between
main relay and heated oxygen sensor and ECM.
1MZ–FE ENGINE – CIRCUIT INSPECTION
(1) Remove glove compartment
(See page EG2–309).
(2) Turn ignition switch ON.
Measure voltage between terminals HTR, HTS,
HTL of ECM connector and body ground.
Connect terminal HTR to bank 1 sensor 1.
Connect terminal HTS to bank 1 sensor 2.
Connect terminal HTL to. bank 2 sensor 1.
Voltage: 9 –14 V
Check and replace ECM (See page IN–36).
Disconnect heated oxygen sensor connector.
Measure resistance between terminals 1
and 2 of heated oxygen sensor connector.
Resistance: 11 –16
Replace heated oxygen sensor.
EG2–483
at 202C (682F)