(2) Check that there is voltage between ECM terminal + 131 (+ B ) 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.
Throttle valve fully closed
(Throttle opener must be
cancelled first)
Check wiring between ECM and
throttle position sensor.
Replace or repair throttle
position sensor.
(3) Check throttle position sensor.
Throttle valve fully open
Throttle valve open
• IDL – E2 (E21)
Ignition
switch O N
Replace or repair.
Replace or repair.
Try another ECM.
Refer to No. 1.
STD Voltage
No voltage
Condition
Terminals
Trouble
BAD
BAD
BAD
BAD
No.
–ENGINE MFI SYSTEM
EG2–188
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