Toyota 22R-E Service Manual page 201

Terminals
No.
ENGINE
Trouble
Ignition switch
No voltage
ON
(1) There is no voltage between ECM terminals THW and E2
(E21) (IG SW ON)
(2) Check that there is voltage between ECM terminal + B (+ B1)
and body ground. (IG SW ON)
Check wiring between ECM terminal E1 and body
ground.
Check engine coolant temp. sensor.
BAD
Replace engine coolant
temp. sensor.
Try another ECM.
– MFI SYSTEM
Condition
Coolant temperature 80_C
(176_F)
Check wiring between ECM and
engine coolant temp. sensor.
EG1–167
STD Voltage
Refer to No. 1.
BAD
Repair or replace.
BAD
Repair or replace.