Suzuki VLR1800 Service Manual page 102

1A-33 Engine General Information and Diagnosis:
Step
1 6) Disconnect the ECM coupler. Refer to "ECM Removal
and Installation in Section 1C (Page 1C-1)".
7) Insert the needle pointed probes to the lead wire coupler.
8) Check the continuity between Bl/R wire and terminal
"26" (#2), or G/B wire and terminal "9" (#1).
If OK, then check the continuity between B/Br wire (#1
and #2) and terminal "29".
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity (
ECM coupler (Harness side)
(B)
Is the continuity OK?
Action
)
(A)
"9"
"26"
"29"
(Gray)
(Black)
Yes
Go to Step 2.
I822H1110140-02
No
G/B or Bl/R wire shorted
to VCC, or B/Br wire
open.