Suzuki Intruder VZ1500 Service Manual page 142

1A-75 Engine General Information and Diagnosis:
Step
1 1) Turn the ignition switch OFF.
2) Check the ISC valve coupler (1) for loose or poor
contacts.
If OK, then check the ISC valve lead wire continuity.
3) Disconnect the ISC valve coupler and ECM coupler.
Refer to "ECM Removal and Installation in Section 1C
(Page 1C-1)".
4) Check the continuity between terminal "A" and "47",
terminal "B" and "49", terminal "C" and "40", terminal "D"
and "38".
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity (
ECM couplers (Harness side)
"B"
"A"
(B)
Is the continuity OK?
Action
1
)
"C"
"D"
"38"
"40"
"49"
"47"
Yes
Go to Step 2.
I940H1110066-01
(A)
I940H1110067-03
No
B/R, B/Bl, B/G, or Dg
wire open.