|
|
AMBIENT SENSOR HAC-79 < DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P AMBIENT SENSOR Component Description INFOID:0000000006243666 COMPONENT DESCRIPTION Ambient Sensor Ambient sensor (1) is attached to the radiator core support (left side). It detects ambient temperature and con- verts it into a value which is then input into the A/C auto amp. • ⇐ : Front AMBIENT TEMPERATURE INPUT PROCESS The A/C auto amp. includes a processing circuit for the ambient sensor input. However, when the temperature detected by the ambient sensor increases quickly, the processing circuit retards the A/C auto amp. function. It only allows the A/C auto amp. to recognize an ambient temperature increase of 0.33 ° C (0.6 ° F) per 100 sec- onds. This prevents constant adjustments due to momentary conditions, such as stopping after high speed driving. Although the actual ambient temperature has not changed, the temperature detected by the ambient sensor will increase. This is because the heat from the engine compartment can radiate to the front grille area, loca- tion of the ambient sensor. Ambient Sensor Diagnosis Procedure INFOID:0000000006243667 Regarding Wiring Diagram information, refer to HAC-95, "Wiring Diagram - Automatic" DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR SYMPTOM: Ambient sensor circuit is open or shorted. (40 or 41 is indicated on A/C auto amp. as a result of conducting the A/C auto amp. self-diagnosis) 1. CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND AWIIA0262ZZ AWIIA0160GB 2011 Pathfinder |