4-42 FI SYSTEM
INSPECTION
• Lift and support the fuel tank with a proper stay. (4-48)
“C28” STV ACTUATOR CIRCUIT MALFUNCTION
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.
“C24” or “C25” IGNITION SYSTEM MALFUNCTION
*REFER TO THE IGNITION SYSTEM FOR DETAILS. (7-20)
Turn the ignition switch OFF.
Check the STVA lead wire coupler for loose or poor con-
tacts.
Disconnect the STVA lead wire coupler.
Check the continuity between Red wire and ground.
STVA continuity:
∞Ω∞Ω
∞Ω∞Ω
∞Ω (Infinity)
If OK, then measure the STVA resistance. (between Red
and Black wires)
STVA resistance: Approx. 4.8 – 7.2
ΩΩ
ΩΩ
Ω
(+ Red – - Black)
\ 09900-25008: Multi circuit tester
V Tester knob indication: Resistance (
ΩΩ
ΩΩ
Ω)
No
Replace the STVA
with a new one.
Ye s
Loose or poor contacts on the STVA coupler, or poor J or L
connection. (4-22)
If wire and connection are OK, intermittent trouble or faulty
ECM. Recheck each terminal and wire harness for open cir-
cuit and poor connection. (4-4)
Replace the ECM with
new one, and inspect it
again.
1
W
1
1
ECM coupler
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