The intake air temperature sensor is built-into the mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the rise in temperature.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE 1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.
>> GO TO 2. 2.PERFORM DTC CONFIRMATION PROCEDURE With CONSULT-III
Wait until engine coolant temperature is less than 90°C (194°F)
Turn ignition switch ON.
Select "DATA MONITOR" mode with CONSULT-III.
Check the engine coolant temperature. If the engine coolant temperature is not less than 90°C (194°F) , turn ignition switch OFF and cool down engine.
NOTE:
Perform the following steps before engine coolant temperature is approximately 90°C (194°F) .
Turn ignition switch ON.
Select "DATA MONITOR" mode with CONSULT-III.
Start engine.
Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds.
CAUTION: Always drive vehicle at a safe speed.
Check 1st trip DTC. With GST
Follow the procedure "With CONSULT-III" above.
Is 1st trip DTC detected?
YES >> Go to Diagnosis Procedure.
NO >> Inspection END
