(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 IDL and E2 (E21).
(IG SW ON) (Throttle valve open)
Check wiring between ECM terminal E1 and body
ground.
Check wiring between ECM and
throttle position sensor.
Replace or repair throttle
position sensor.
(3) Check throttle position sensor.
Throttle valve fully dosed
Throttle valve fully open
Throttle valve open
• IDL – E2 (E21)
Ignition
switch ON
Try another ECM.
Replace or repair.
Replace or repair.
Refer to No. 1.
4.5 – 5.5 V
STD Voltage
3.2 – 4.9 V
0.3 – 0.8 V
No voltage
9 – 14V
Condition
Terminals
Trouble
BAD
BAD
BAD
BAD
No.
–ENGINE MFI SYSTEM
EG1–163
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