C28" (P1655) Stv Actuator Circuit Malfunction - Suzuki VZR1800 2007 Service Manual

5-58 FI SYSTEM DIAGNOSIS

"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
INSPECTION
Step 1
1) Remove the air cleaner chamber. (#6-13)
2) Check the STVA lead wire coupler for loose or poor contacts.
3) Turn the ignition switch ON to check the STV operation.
(STV operating order: 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.
4) After repairing the trouble, clear the DTC using SDS tool.
(#5-26)
• STVA malfunction
• STVA circuit open or short
• STVA motor malfunction
B/Lg
P/W
G
W/B
POSSIBLE CAUSE
ECM
STVA. 1B
STVA. 1A
STVA. 2B
STVA. 2A
1
1