Suzuki TU250X Service Manual page 188

Step 2
1) Turn the ignition switch ON.
2) Measure the voltage between O/W wire and ground.
 PAIR valve voltage: Battery voltage
 09900-25008: Multi circuit tester set
 Tester knob indication: Voltage ()
Is the voltage OK?
• B/G wire open or shorted to ground, or poor E
connection failure.
• 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 or short circuit in the O/W wire.
ACTIVE CONTROL INSPECTION
1) Set up the SDS tool. (Refer to the SDS operation manual for
further details.)
2) Turn the ignition switch to ON.
3) Click "PAIR Sol operating control" 1.
4) Click each button 2.
At this time, if an operation sound is heard from the PAIR
control solenoid valve, the function is normal.
(+ O/W – - Ground)
FI SYSTEM DIAGNOSIS 4-67
2
2
ECM coupler (Harness side)
V