Suzuki VZR1800 2007 Service Manual page 254

Step 2
1) Turn the ignition switch OFF.
2) Measure the IAT sensor resistance.
$ IAT sensor resistance: Approx. 2.45 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 Q or S 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)
80 °C (176 °F)
120 °C (248 °F)
NOTE:
IAT sensor resistance measurement method is the same way as
that of the ECT sensor. Refer to page 8-9 for details.
(Terminal – Terminal)
Resistance
Approx. 2.45 kΩ
Approx. 0.322 kΩ
Approx. 0.117 kΩ
FI SYSTEM DIAGNOSIS
2
2
ECM coupler (Harness side)
(Black)
5-53
(Gray)