Suzuki FL125S Service Manual page 338

8-63 FL125SDW
Step 2
1) Turn the ignition switch OFF.
2) Disconnect the IAT sensor coupler.
3) Measure the IAT sensor resistance.
! IAT sensor resistance: Approx. 2.56 kΩ at 20 °C
$ 09900-25008: Multi-circuit tester set
& Tester knob indication: Resistance (Ω)
Is the resistance OK?
• Dg or Br/B wire open or shorted to ground, or
poor L or 4 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.
Replace the IAT sensor (throttle body assembly)
NO
with a new one.
%
When using the multi-circuit tester, do not strongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
Approx. 1.20 kΩ at 40 °C
(Terminal A – Terminal B)
2
2
ECM coupler (Harness side)