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

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

Procedure for malfunction A and B
WITH CONSULT
1) 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.
2) Turn ignition switch "ON".
3) Elect "DATA MONITOR" mode with CONSULT.
4) Wait at least 5 seconds.

OR

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

OR

WITH NO TOOLS
1) 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 1.2 (V)

(c) If the voltage is not more than 1 .2V, turn ignition switch "OFF" and cool down engine.
2) Turn ignition switch "ON" wait at least 5 seconds.
3) Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
4) Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.




WIRING DIAGRAM




DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION



Check resistance as shown in the figures.







If no good, replace the intake air temperature sensor.