Diagnosis Procedure

AMBIENT SENSOR


Description


COMPONENT DESCRIPTION

Ambient Sensor
The ambient sensor (1) is attached on hood lock stay assembly. It detects ambient temperature and converts it into a resistance value which is then input into the unified meter and A/C AMP.






Ambient Sensor Circuit






AMBIENT TEMPERATURE INPUT PROCESS
The unified meter and A/C AMP. equips a processing circuit for the ambient sensor input. However, when the temperature detected by the ambient sensor increases quickly, the processing circuit retards the unified meter and A/C AMP. function. It only allows the unified meter and A/C AMP. to recognize an ambient temperature increase of 0.33�C (0.6�F) per 100 seconds.











AMBIENT SENSOR


Diagnosis Procedure

1.CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND
1. Disconnect ambient sensor connector.
2. Turn ignition switch ON.
3. Check voltage between ambient sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 4.
2.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C AMP. connector.
3. Check continuity between ambient sensor harness connector and unified meter and A/C AMP. harness connector.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair harness or connector.
3.CHECK AMBIENT SENSOR
Check ambient sensor. Refer to Component Inspection.
Is the inspection result normal?
YES - Replace unified meter and A/C AMP.
NO - Replace ambient sensor.
4.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C AMP. connector.
3. Check continuity between ambient sensor harness connector and unified meter and A/C AMP. harness connector.





4. Check continuity between ambient sensor harness connector and ground.





Is the inspection result normal?
YES - Replace unified meter and A/C AMP.
NO - Repair harness or connector.