5) Measure the voltage between Dg wire terminal and ground.
6) Also, measure the voltage between Dg wire terminal and B/Br
wire terminal.
$ IAT sensor input voltage: 4.5 – 5.5 V
(+ Dg – - Ground)
(+ Dg – - B/Br)
# 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
' Tester knob indication: Voltage (()
Is the voltage OK?
Step 2
1) Turn the ignition switch OFF.
2) Remove the air cleaner box. (!Page 51)
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 EOT sensor. Refer to DL650
service manual 6-10 for details.
YES Go to Step 2.
NO
• Loose or poor contacts on the ECM coupler
(Terminal 2 or B).
• Open or short circuit in the Dg wire or B/Br wire.
1
V
2
YES
• Dg or B/Br wire open or shorted to ground, or
poor 2 or B 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. 2.56 kΩ
40 °C (104 °F) Approx. 1.20 kΩ
60 °C (140 °F) Approx. 0.61 kΩ
80 °C (176 °F) Approx. 0.33 kΩ
ECM coupler (Harness side)
2
13-26 DL650K7/AK7 (’07-MODEL)
PartShark.com
877-999-5686
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