Engine General Information and Diagnosis: 1A-236
4
Main relay circuit check
1) Turn ignition switch to OFF position.
2) Check “FI” fuse (1) (20 A) in fuse box No.2 for blowing.
For J20 engine
For M16 engine
3) If OK, measure voltage between “E23-60” terminal of
ECM connector and body ground.
Is voltage 10 – 14 V?
Go to Step 5.
Go to Step 9.
5
Main relay circuit check
1) Connect connectors to ECM with ignition switch turned
OFF.
2) Turn ignition switch to ON position.
3) Measure voltage between “E23-60” terminal of ECM
connector and body ground.
Is voltage 0 – 1 V?
Go to Step 7.
Go to Step 6.
6
ECM ground circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors from ECM.
3) Measure resistance between each “C37-15”, “C37-30”,
“C37-29”, “C37-48” and “C37-58” terminals of ECM
connector and body ground.
Is resistance 1
Ω
or less?
Substitute a known-
good ECM and recheck.
“BLK/ORN” or “BLK/
YEL” wire is open or
high resistance circuit.
7
Main relay circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Using service wire, ground “E23-60” terminal of ECM
connector and measure voltage between each “E23-1”
and “E23-16” terminals of ECM connector and body
ground.
Is voltage 10 – 14 V?
Go to Step 11.
Go to Step 8.
Step
Action
Yes
No
1
I5JB0A110097-02
1
I5JB0A110098-02
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