FUEL INJECTION SYSTEM
8-53
5 Defective air temperature
sensor.
Execute the diagnostic
mode. (Code No. 05)
When engine is cold:
Displayed temperature is
close to the ambient temper-
ature.
The displayed temperature is
not close to the ambient tem-
perature. → Check the air
temperature sensor.
Replace if defective.
Refer to “CHECKING THE
AIR TEMPERATURE SEN-
SOR” on page 8-190.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 6.
6 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (engine control unit)” on
page 8-174.
Fault code No. 23
Item Atmospheric pressure sensor: open or short circuit detected.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. 02
Meter display Displays the atmospheric pressure.
Procedure
Compare the actually measured atmospheric pressure with the
meter display value.
Item
Probable cause of mal-
function and check
Maintenance job
Confirmation of service
completion
1 Connection of atmospheric
pressure sensor coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 2.
2 Connection of wire harness
ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected →
Connect the coupler secure-
ly or replace the wire har-
ness.
Turn the main switch to “ON”.
Fault code number is not dis-
played → Service is finished.
Fault code number is dis-
played → Go to item 3.
Fault code No. 22
Item Air temperature sensor: open or short circuit detected.
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