Toyota 22R-E Service Manual page 469

EG2–192
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.
(3) Check engine coolant temp. sensor.
Replace engine
coolant temp. sensor.
Try another ECM.
– MFI SYSTEM
Condition
Engine coolant temperature
80_C (176_F)
BAD
Check wiring between ECM and engine
coolant temp. sensor.
STD Voltage
Refer to No. 1.
BAD
Repair or replace.
BAD
Repair or replace.