Engine General Information and Diagnosis: 1A-86
2 1) Disconnect the ECM coupler. Refer to “ECM Removal
and Installation in Section 1C (Page 1C-1)”.
2) Insert the needle pointed probes to the lead wire coupler.
3) Check there is continuity between the P wire “A” and
ECM terminal “1”.
Also the B/W wire “B” and ECM terminal “13”.
Special tool
(A): 09900–25008 (Multi circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity ( )
4) If the sound is head from the tester, then check there is
no continuity among the P wire “A” and ground, B/W wire
“B” and ground, P wire “A” and another wire, B/W wire
and another wire.
Special tool
(A): 09900–25008 (Multi circuit tester set)
Tester knob indication
Continuity ( )
Is continuity OK?
Go to Step 3. Short circuit in the P
wire or B/W wire.
Step Action Yes No
(A)
“1” “13”
(B)
“A”
“B”
I944H1110181-01
“A”
“B”
(A)
I944H1110182-02