Intake Air Temp. Sensor Circuit - Toyota 3VZ–FE Troubleshooting Manual

EG–374
DTC 24
CIRCUIT DESCRIPTION
The intake air temp. sensor is built into the volume air flow meter and senses the intake air temperature.
The structure of the sensor and connection to the ECM is the same as the water temp. sensor shown on page
EG–370.
If the ECM records the diagnostic trouble code "24", it operates the fail safe function, keeping the intake air tem-
perature at a constant 20C (68F).
Code No. Diagnostic Trouble Code Detecting Condition
Open or short in intake air temp. sensor circuit for 0.5
24
sec. or more.
DIAGNOSTIC CHART DIAGNOSTIC CHART
WIRING DIAGRAM
ENGINE TROUBLESHOOTING

Intake Air Temp. Sensor Circuit

– CIRCUIT INSPECTION

Open or short in intake air temp. sensor cir-
cuit.

Intake air temp. sensor

ECM
Trouble Area
(See page EG–333).