Suzuki SV650A - Page 31

30 SV650K7/SK7/AK7/SAK7 (’07-MODEL)
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) Disconnect the IAT sensor coupler.
3) Measure the IAT sensor resistance.
$ IAT sensor resistance: Approx. 2.5 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 SV650/S
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
SAMPLE