Suzuki GF60A, Service Manual

Page: 72 / 336

1A-20 Engine Control:
Self-Diagnostic Code “2 – 3” IAT Sensor
ZAJ6111104005
Wiring Diagram
Troubleshooting
ECM
Lg/B
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32 33 34 35 36
8
32
25
6
33
W
B/W
Br/Y
R
B/W Br/Y R W Lg/B
1
2
3
IAJ611110006-01
1. MAP sensor / TPS / IAT sensor 2. Sensor connector (harness side) 3. ECM connector (harness side)
Step Action Yes No
1 1) Turn the ignition switch “OFF”.
2) Check the IAT sensor connector for loose or poor
contacts. If OK, then check the IAT sensor lead wire
continuity.
3) Disconnect the IAT sensor connector at sensor.
4) Check the continuity between “Lg/B” wire terminal and
“B/W” wire terminal.
Is it no continuity?
Go to step 2. “Lg/B” wire shorted to
“B/W” wire.
2 1) With the ignition switch “OFF”, disconnect the IAT sensor
connector.
2) With the ignition switch “ON”, check the voltage at the
“Lg/B” wire terminal of the IAT sensor connector.
Is the voltage 4 V or more?
Go to step 3. • “Lg/B” wire shorted to
“B/W” wire or ground
circuit.
• If the wiring is OK,
substitute a known-
good ECM and
recheck.
3 1) Check the IAT sensor.
Refer to “IAT Sensor Inspection” in Section 1C (Page
1C-10).
Is it in good condition?
Poor IAT sensor
connection, intermittent
trouble or a faulty ECM
may be cause. Faulty IAT sensor.