Suzuki Boulevard M50, Service Manual

Page: 208 / 454

FI SYSTEM 5-51
Step 2
1) Turn the ignition switch OFF.
2) Disconnect the IAT sensor coupler.
3) Measure the IAT sensor resistance.

IAT sensor resistance: Approx. 2.6 k
Ω
at 20 °C (68 °F)
(Terminal – Terminal)

09900-25008: Multi-circuit tester set

Tester knob indication: Resistance (
Ω
)
Is the resistance OK?

IAT sensor specification
NOTE:
IAT sensor resistance measurement method is the same way as
that of the ECT sensor. Refer to 5-46 for details.
4) After repairing the trouble, clear the DTC using SDS tool.
(

5-25)
2
YES
• Dg or B/Br wire open or shorted to ground, or
poor
2
or
D
connection
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• 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.
Intake Air Temp. Resistance
20 °C (68 °F) Approx. 2.6 k
Ω
50 °C (122 °F) Approx. 0.8 k
Ω
80 °C (176 °F) Approx. 0.3 k
Ω
110 °C (230 °F) Approx. 0.2 k
Ω
ECM coupler (Harness side)
2
SA
MP
LE