Suzuki SFV650 - DTC C24 (P0351) or C25 (P0352): Ignition System Malfunction; DTC C28 (P1655): Secondary Throttle Valve Actuator (STVA) Malfunction

1A-67 Engine General Information and Diagnosis:
DTC “C24” (P0351) or “C25” (P0352): Ignition System Malfunction
B944H11104017
NOTE
• Refer to “No Spark or Poor Spark in Section 1H (Page 1H-3)” for details.
• When indicating “C24” (P0351) for #1 front cylinder side.
• When indicating “C25” (P0352) for #2 rear cylinder side.
DTC “C28” (P1655): Secondary Throttle Valve Actuator (STVA) Malfunction
B944H11104018
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 terminal damage.
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 can not operate properly.
• STVA malfunction.
• STVA circuit open or short.
• STVA motor malfunction.
ECM
STVA. 2B
STVA. 1A
STVA. 1B
STVA
STVA. 2A
35
37
44
46
B/Lg
P/W
W/B
G
I944H1110177-01
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I944H1110056-01