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FI
FUEL INJECTION SYSTEM
Fault code No. 22 Symptom Open or short circuit is detected from the intake air temperature sensor.
Used diagnostic code No. 05 (intake air temperature sensor)
Order Item/components Check or maintenance job Restore method
1 Intake air temperature sensor
installation
Check the sensor looseness or pinching. Reinstated by set-
ting the main switch
to “ON”.
2 Coupler connections
Intake air temperature sensor cou-
pler
ECU coupler
Check the couplers for any pins that may have
pulled out.
Check that the couplers are securely locked.
If necessary, repair the coupler or securely con-
nect it.
3 Open or short circuit in the wire har-
ness
Repair or replace if there is an open or short cir-
cuit between the wire harnesses.
Black/Blue - Black/Blue
Brown/White - Brown/White
4 Defective intake air temperature
sensor
Execute the diagnostic mode. (Code No. 05)
Replace the sensor if it is defective.
1. Remove the intake air temperature sensor
from the air filter case.
2. Connect the pocket tester (Ω × 100) to the
intake air temperature sensor terminal as
shown.
3. Measure the intake air temperature sensor
resistance.
WARNING
• Handle the intake air temperature sensor
with special care.
• Never subject the intake air temperature
sensor to strong shocks. If the intake air
temperature sensor is dropped, replace it.
4. Is the intake air temperature sensor OK?
Positive tester probe
→
brown/white
1
Negative tester probe
→
black/blue
2
Br/W
B/L
21
Intake air temperature sensor
resistance
2.21 ~ 2.69
Ω
at 20 °C (68 °F)