C28" (P1655) Stv Actuator Circuit Malfunction - Suzuki GSX-R1000 2007 Service Manual

4-66 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
B
P
G
W/BI
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle pointed tester probe to prevent the terminal damage or terminal bend.
INSPECTION
Step 1
1) Lift and support the fuel tank. ( 5-3)
2) Remove the air cleaner cover. ( 2-4)
3) Check the STVA lead wire coupler
tacts.
4) Turn the ignition switch ON to check the STV operation.
(STV operating order: Open → Close)
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 G
NO
wires
• If wire and connection are OK, go to Step 2.
5) After repairing the trouble, clear the DTC using SDS tool.
( 4-28)
• STVA malfunction
• STVA circuit open or short
• STVA motor malfunction
B/Lg
P/W
G
W/B
for loose or poor con-
POSSIBLE CAUSE
ECM
STVA. 1B
STVA. 1A
STVA. 2B
STVA. 2A
1
1