Suzuki VL1500K5 Supplementary Service Manual page 75

74 VL1500K5 ('05-MODEL)
"C28" (P1655) STV ACTUATOR CIRCUIT MALFUNCTION
DETECTED CONDITION
The operation voltage does not reach the STVA.
ECM does not receive communication signal from
the STVA.
STVA
B
P
G
W/B
INSPECTION
Step 1
1) Remove the air cleaner box. (!Page 103)
2) Turn the ignition switch OFF.
3) Check the STVA lead wire coupler for loose or poor contacts.
4) Turn the ignition switch ON to check the STV operation.
(STV operating order: 95% open → Full open → 95% open)
Is the operating OK?
YES Go to Step 2.
• Loose or poor contacts on the STVA coupler.
• Open or short circuit in the B/Lg, P/W, W/B or
NO
Green wires.
• If wire and connection are OK, go to Step 2.
5) After repairing the trouble, clear the DTC using SDS tool.
(!Page 42)
POSSIBLE CAUSE
• STVA malfunction.
• STVA circuit open or short.
• STVA motor malfunction.
B/Lg
P/W
G
W/B
1
1
ECM
STVA. 1B
STVA. 1A
STVA. 2B
STVA. 2A