C28" (P1655) Stv Actuator Circuit Malfunction - Suzuki VZ800 Service Manual

5-56 FI SYSTEM

"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/Bl
INSPECTION
Step 1
1) Remove the fuel tank. (6-3)
2) Turn the ignition switch OFF.
3) Check the STVA lead wire coupler for loose or poor contacts.
4) Loosen the inlet pipe screw. (2-7)
Lift up the inlet pipe. (5-45)
5) 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, Black or
NO
Green wires
• If wire and connection are OK, go to Step 2.
6) After repairing the trouble, clear the DTC using SDS tool.
(5-25)
POSSIBLE CAUSE
• STVA malfunction
• STVA circuit open or short
• STVA motor malfunction
B/Lg
P/W
G
B
1
1
ECM
STVA. 1B
STVA. 1A
STVA. 2B
STVA. 2A