5-48 FI SYSTEM DIAGNOSIS
“C21” (P0110) IAT SENSOR CIRCUIT MALFUNCTION
INSPECTION
Step 1 (When indicating C21:)
1) Remove the left side cover. (
$
8-8)
2) Turn the ignition switch OFF.
3) Check the IAT sensor coupler for loose or poor contacts.
If OK, then measure the IAT sensor voltage at the wire side
coupler.
4) Disconnect the coupler and turn the ignition switch ON.
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 voltage: 4.5 – 5.5 V
(
+
Dg –
-
Ground)
(
+
Dg –
-
B/Br)
%
09900-25008: Multi-circuit tester set
4
Tester knob indication: Voltage (
5
)
Is the voltage OK?
DETECTED CONDITION
POSSIBLE CAUSE
C21
Output voltage is not within the following
range.
0.15 < Sensor voltage
4.85 V
• IAT sensor circuit open or short.
• IAT sensor malfunction.
• ECM malfunction.
P0110
H
Sensor voltage is higher than specified
value.
• IAT sensor circuit open or ground circuit open.
• IAT sensor circuit shorted to ground.
L
Sensor voltage is lower than specified
value.
IAT sensor
ECM
IAT
E2
Dg
B/Br
1
YES
Go to Step 2.
NO
• Loose or poor contacts on the ECM coupler.
• Open or short circuit in the Dg wire or B/Br wire.
1
V
Summary of Contents for LT-A700X 2004
Page 25: ...2 8 PERIODIC MAINTENANCE INTAKE SIDE ...
Page 26: ...PERIODIC MAINTENANCE 2 9 EXHAUST SIDE ...
Page 46: ...PERIODIC MAINTENANCE 2 29 ...
Page 59: ...3 8 ENGINE Remove the engine from the right side ...
Page 133: ...3 82 ENGINE Pull the rope and check that the ratchet is pushed out ...
Page 155: ......
Page 263: ......
Page 301: ...7 20 COOLING AND LUBRICATION SYSTEM EXHAUST SIDE INTAKE SIDE ...
Page 302: ......
Page 312: ...CHASSIS 8 9 REAR CARRIER Remove the rear carrier 1 ...
Page 386: ......
Page 420: ...ELECTRICAL SYSTEM 9 33 HEADLIGHT INSTALLATION Head light coupler Head light R Adjusting point ...
Page 453: ...10 26 SERVICING INFORMATION Rear box Rear fender Right mud guard Left mud guard ...
Page 477: ......
Page 480: ...Prepared by September 2004 Part No 99500 46060 01E Printed in U S A 472 ...