Suzuki TU250X, Руководство по обслуживанию

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4-54 FI SYSTEM DIAGNOSIS
Step 2
1) Turn the ignition switch OFF.
2) Disconnect the STVA lead wire coupler.
3) Check the continuity between each terminal and ground.

STVA continuity:
∞ Ω
(Infinity)
(Terminal – Ground)
4) If OK, then measure the STVA resistance (between B wire
A
and P wire
B
) and (between G wire
C
and W/BI wire
D
).

STVA resistance: Approx. 6.5
Ω
(B
A
– P
B
)
(G
C
– W/BI
D
)

09900-25008: Multi circuit tester set

Tester knob indication: Resistance (
Ω
)
Is the resistance OK?
2
2
YES
• W/B, W/R, B/R and B wire open or shorted to
ground, or poor
1
,
2
,
H
and
I
connection
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
NO
• Replace the throttle body assembly with a new
one.
ECM coupler (Harness side)
2