Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE




Perform "Procedure for malfunction A" first. If DTC cannot be confirmed, perform "Procedure for malfunction B".

Procedure for malfunction A

With Consult
(1) Turn ignition switch "ON".
(2) Select "DATA MONITOR" mode with CONSULT
(3) Wait at least 5 seconds.

OR

With GST
(1) Turn ignition switch "ON" and wait at least 5 seconds.
(2) Select MODE 3 with GST

OR

Without Scan Tools
(1) Turn ignition switch "ON" and wait at least 5 seconds.
(2) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
(3) Perform diagnostic test mode II (Self-diagnostic results) with ECM.

Procedure for malfunction B

With Consult
(1) Lift up vehicle and open engine hood.




(2) Wait until engine coolant temperature is less than 90°C (194°F).
(a) Turn ignition switch "ON".
(b) Select "DATA MONITOR" mode with CONSULT
(c) Check the engine coolant temperature.
(d) If the engine coolant temperature is not less than 90°C (194°F), turn ignition switch "OFF" and cool down engine.
- Perform the following steps before engine coolant temperature is above 90°C (194°F).
(3) Turn ignition switch "ON".
(4) Select "DATA MONITOR" mode with CONSULT.
(5) Start engine.
(6) Shift selector lever to "D" position.
(7) Hold vehicle speed at 70 - 80 km/h (43 - 50 MPH) for 2 minutes.

OR

With GST
(1) Lift up vehicle and open engine hood.




(2) Wait until engine coolant temperature is less than 90°C (194°F).
(a) Turn ignition switch "ON".
(b) Select MODE 1 with GST
(c) Check the engine coolant temperature.
(d) If the engine coolant temperature is not less than 90°C (194°F), turn ignition switch "OFF" and cool down engine.
- Perform the following steps before engine coolant temperature is above 90°C (194°F).
(3) Start engine.
(4) Shift selector lever to "D" position.
(5) Hold vehicle speed at 70 - 80 km/h (43 - 50 MPH) for 2 minutes.
(6) Select MODE 3 with GST

OR

Without Scan Tools
(1) Lift up vehicle and open engine hood.
(2) Wait until engine coolant temperature is less than 90°C (194°F).
(a) Turn ignition switch "ON".




(b) Check voltage between ECM terminal 51 and ground.

Voltage: More than 1.0 (V)

(c) If the voltage is not more than 1.0 (V), turn ignition switch "OFF" and cool down engine.
- Perform the following steps before the voltage is below 1.0V.
(3) Start engine.
(4) Shift selector lever to "D" position.
(5) Hold vehicle speed at 70 - 80 km/h for 2 minutes.
(6) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
(7) Perform diagnostic test mode II (Self-diagnostic results) with ECM.

CIRCUIT DIAGRAM





DIAGNOSTIC PROCEDURE





COMPONENT INSPECTION









Intake air temperature sensor
Check resistance as shown in the figure.