Toyota 22R-E - Page 183

(2) Check that there is voltage between ECM terminal +B (+B1)
and body ground.* (IG SW ON)
(1) There is no voltage between ECM terminals THW and E2 (E21).
(IG SW ON)
Check wiring between ECM terminal E1 and
body ground.
Check engine coolant temp. sensor.
Check wiring between ECM and
engine coolant temp. sensor.
Coolant temperature 80C
(176)
Replace engine
coolant temp. sensor.
Repair or replace.
Ignition switch
ON
Try another ECM.
Repair or replace.
Refer to No. 1.
STD– Voltage
No voltage
Terminals
Condition
Trouble
BAD
BAD
BAD
No.
–ENGINE MFI SYSTEM
EG1–149