C24" Or "C25" Ignition System Malfunction; C28" Stv Actuator Circuit Malfunction - Suzuki DL1000 Service Manual

"C24" or "C25" IGNITION SYSTEM MALFUNCTION

*REFER TO THE IGNITION SYSTEM FOR DETAILS. (#7-19)

"C28" STV ACTUATOR CIRCUIT MALFUNCTION

DETECTED CONDITION
The operation voltage does not reach the STVA.
ECM does not receive communication signal from
the STVA.
INSPECTION
• Remove the fuel tank and air cleaner element. ( : 4-52 and
2-4)
1
Turn the ignition switch OFF.
Check the STVA lead wire coupler for loose or poor
contacts.
Turn the ignition switch ON to check the STV operation.
STV operating order: Half open → full close → Full open
→ 75% open → Half open (about 20 seconds later)
Yes
2
Turn the ignition switch OFF.
Check the STVA lead wire coupler for loose or poor
contacts.
Disconnect the STVA lead wire coupler.
Check the continuity between Red wire and ground.
; STVA continuity: ∞Ω (Infinity)
If OK, then measure the STVA resistance. (between Red
and Black wires)
; STVA resistance: Approx. 4.8 – 7.2 Ω
z 09900-25008: Multi circuit tester
u Tester knob indication: Resistance (Ω)
Yes
Loose or poor contacts on the STVA coupler, or poor L
connection. ( : 4-22)
If wire and connection are OK, intermittent trouble or faulty
ECM. Recheck each terminal and wire harness for open
circuit and poor connection. ( : 4-5)
Loose or poor contacts on
No
the STVA coupler.
Open or short circuit in the
Red and Black wires.
+ -
( Red – Black)
No
Replace the STVA
with a new one.
Replace the ECM with a new one,
and inspect it again.
POSSIBLE CAUSE
• STVA malfunction.
• STVA circuit open or short.
• STVA motor malfunction.
1
2
2
J
or
FI SYSTEM 4-43
Ω
Ground
Ω
ECM coupler