Suzuki GSF650A - DTC C24 (P0351), C25 (P0352), C26 (P0353) or C27 (P0354): Ignition System Malfunction; DTC C28 (P1655): Secondary Throttle Valve Actuator (STVA) Malfunction

1A-75 Engine General Information and Diagnosis:
DTC “C24” (P0351), “C25” (P0352), “C26” (P0353) or “C27” (P0354): Ignition System Malfunction
B817H21104017
NOTE
Refer to “No Spark or Poor Spark in Section 1H (Page 1H-2)” for details.
DTC “C28” (P1655): Secondary Throttle Valve Actuator (STVA) Malfunction
B817H21104018
Detected Condition and Possible Cause
Wiring Diagram
ECM coupler (Harness side)
Troubleshooting
CAUTION
!
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.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset
Procedures (Page 1A-15)”.
Detected Condition Possible Cause
The operation voltage does not reach the STVA.
ECM does not receive communication signal from the
STVA.
• STVA malfunction.
• STVA circuit open or short.
• STVA motor malfunction.
ECM
STVA. 2B
STVA. 1A
STVA. 1B
STVA
STVA. 2A
B
P
G
W/Bl
B/Lg
P/W
G
W/B
19
2
18
1
I718H1110077-04
I718H1110240-01