Suzuki RM-z450 Owner's Service Manual page 204

12-35 FI SYSTEM DIAGNOSIS
Step 2
1) Stop the engine.
2) Disconnect the IAT sensor coupler.
3) Measure the IAT sensor resistance.
# IAT sensor resistance: Approx. 2.58 kΩ at 20 °C (68 °F)
! 09900-25008: Multi-circuit tester set
$ Tester knob indication: Resistance (Ω)
Is the resistance OK?
• Dg or B/Br wire open or shorted to ground, or
poor O or N 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 Replace the IAT sensor with a new one.
# IAT sensor specification
Intake Air Temp.
20 °C (68 °F)
50 °C (122 °F)
80 °C (176 °F)
110 °C (230 °F)
NOTE:
IAT sensor resistance measurement method is the same way as
that of the ECT sensor. Refer to page 12-47 for details.
(Terminal – Terminal)
Resistance
Approx. 2.58 kΩ
Approx. 0.77 kΩ
Approx. 0.28 kΩ
Approx. 0.12 kΩ
2
2
ECM coupler (Harness side)