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"C28" STY ACTUATOR CIRCUIT MALFUNCTION
FI
SYSTEM
DIAGNOSIS
4·45
DETECTED CONDITION POSSIBLE CAUSE
The operation voltage does not reach the STVA.
• STVA malfunction.
ECM does not receive communication signal from
• STVA circuit open or short.
the STVA.
• STVA motor malfunction.
INSPECTION
Step 1
1) Lift and support the fuel tank with its prop stay. (c::::T'5-5)
2) Remove the air cleaner element.
3) Turn the ignition switch OFF.
4) Check the STVA lead wire coupler for loose or poor contacts.
5) Turn the ignition switch ON to check the STVA operation.
(STV operating order: Full open
-7
95 % open)
Is the operation OK?
YES Go to Step 2.
• Loose or poor contacts on the STVA coupler.
NO
• Open or short circuit in the (Pink or Slack) and
(W/SI or Green) wires.