Suzuki GW250 Service Manual page 190

• Voltage
 09900-25008: Multi circuit tester set
 Tester knob indication: Voltage ()
– Between Y/R wire or B/Br wire and ground: approx. 0 V
(When ignition switch is ON)
Is check result OK?
Replace the ECM with a known good one, and
YES
inspect it again.
NO Repair or replace the defective wire harness.
Step 3
IAT sensor check
1) Turn the ignition switch OFF.
2) Measure the IAT sensor resistance.
NOTE:
IAT sensor resistance measurement method is the same way as
that of the ECT sensor. Refer to page 7-10 for details.
 09900-25008: Multi circuit tester set
 Tester knob indication: Resistance ()
 IAT sensor resistance:
Approx. 2.45 k at 20 °C (68 °F)
(Terminal – Terminal)
Is check result OK?
Replace the ECM with a known good one, and
YES
inspect it again.
NO Replace the IAT sensor with a new one.
FI SYSTEM DIAGNOSIS 4-49
2
3
V