Service manual

FUEL INJECTION SYSTEM
FI ifl
Fault code No. 22 Symptom
Intake temperature sensor open or short circuit is detected.
Used diagnostic code No. D05 (intake air temperature sensor)
Order
Inspection operation item and
probable cause
Operation item and countermeasure
Reinstatement
method
Installed condition of sensor
Connected condition of con-
nector
Inspect the coupler for any
pins that may have pulled
out.
Check the locking condition
of the coupler.
Open or short circuit in wireing
harness and/or sub lead.
Defective intake air tempera-
ture sensor.
Check the installed area for looseness or
pinching.
If there is a malfunction, repair it and connect
it securely.
Intake air temperature sensor coupler
Main wiring harness ECU coupler
Sub-wire harness coupler
Repair or replace if there is an open or short
circuit.
Between sensor coupler and ECU coupler
black/blue - black/blue
brown/white - brown/white
Execute the diagnostic mode (code No. D05)
Replace the throttle body.
NOTE:
Do not remove the sensor assembly (MAQS).
1. Connect the digital circuit tester to the in-
take air temperature sensor terminal as
shown.
Positive tester probe -» brown/white 1
Negative tester probe -» black/blue 2
2. Measure the intake air temperature sensor
resistance.
n„
Intake air temperature sensor resis-
tance
2.4~2.9k at 20°C (68°F)
w
8 Handle the intake air temperature sen-
sor with special care.
8 Never subject the intake air temperature
sensor to strong shocks. If the intake air
temperature sensor is dropped, replace
it.
3. Is the intake air temperature sensor OK?
Reinstated by turn-
ing the main switch
ON.
1
2
3
4
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