Suzuki TU250X Service Manual page 182

5) If OK, then check the continuity between each terminal and
ground.
 Fuel injector continuity: ∞ Ω (Infinity)
 09900-25008: Multi circuit tester set
 Tester knob indication: Resistance (Ω)
Are the resistance and continuity OK?
YES Go to Step 2.
Replace the fuel injector with a new one.
NO
(5-19)
Step 2
1) Turn the ignition switch ON.
2) Measure the fuel injector voltage between O/W wire and
ground.
 Fuel injector voltage: Battery voltage
NOTE:
Injector voltage can be detected only for 3 seconds after ignition
switch is turned ON.
 09900-25008: Multi circuit tester set
 Tester knob indication: Voltage ()
Is the voltage OK?
• Lg/W wire open or shorted to ground, or poor F
connection
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
YES
• 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 Open circuit in the O/W wire
(+ O/W – - Ground)
FI SYSTEM DIAGNOSIS 4-61
1
2
2
ECM coupler (Harness side)
V