Inspection Procedure

DTC 24 Intake Air Temp. Sensor Circuit

INSPECTION PROCEDURE

Intake Air Temperature Sensor Circuit:

1. CHECK VOLTAGE BETWEEN TERMINALS THA AND E2 OF ENGINE CONTROL MODULE CONNECTOR.



(a) Connect the Check Harness A.
(b) Turn ignition switch ON.
(c) Measure voltage between terminals THA and E2 of ECM connector.

OK if: Voltage...
@ 20°C (68°F): 0.5 to 3.4 volts
@ 80°C (176°F): 0.2 to 1.0 volts

- If OK check for momentary interruption.
- If not OK proceed to step 2.

2. CHECK INTAKE AIR TEMPERATURE SENSOR.



(a) Disconnect the volume air flow meter connector.
(b) Measure resistance between terminals 1 and 2 of volume air flow meter connector.



- If OK proceed to step 3.
- If not OK replace intake air temperature sensor (Replace volume air flow meter).

3. CHECK FOR OPEN AND SHORT IN HARNESS AND CONNECTOR BETWEEN ENGINE CONTROL MODULE AND INTAKE AIR TEMPERATURE SENSOR.
- If OK check and replace ECM.
- If not OK repair or replace harness or connector.

NOTE: If diagnostic trouble codes DTC 22 (engine coolant temperature sensor circuit), DTC 24 (intake air temperature sensor circuit) and DTC 41 (throttle position sensor circuit) are output simultaneously, E2 (sensor ground) may be open.