|
|
HAC-50 < COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] AMBIENT SENSOR AMBIENT SENSOR Description INFOID:0000000004498215 COMPONENT DESCRIPTION Ambient Sensor The ambient sensor (1) is attached on the front bumper reinforce- ment. It detects ambient temperature and converts it into a resis- tance value which is then input into the front air control. AMBIENT TEMPERATURE INPUT PROCESS The automatic amplifier includes a processing circuit for the ambient sensor input. However, when the temper- ature detected by the ambient sensor increases quickly, the processing circuit retards the front air control func- tion. It only allows the front air control to recognize an ambient temperature increase of 0.33 °C (0.6°F) per 100 seconds. As an example, consider stopping for a cup of coffee 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, location of the ambient sensor. Diagnosis Procedure INFOID:0000000004498216 DIAGNOSIS PROCEDURE FOR AMBIENT SENSOR SYMPTOM: Ambient sensor circuit is open or shorted. 1. CHECK VOLTAGE BETWEEN AMBIENT SENSOR HARNESS CONNECTOR AND BODY GROUND 1. Disconnect ambient sensor connector. 2. Press ignition switch ON. 3. Check voltage between ambient sensor harness connector E211 terminal 1 and ground. Is the inspection result normal? YES >> GO TO 2 NO >> GO TO 4 AWIIA0606ZZ AWIIA0030GB Terminal Voltage (V) (Approx.) (+) (-) Connector - Terminal Body ground 5V E211 - 1 RJIA0244E |