Infrared Ray Sensor Circuit - Air Conditioning System

AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1469/69: Infrared Ray Sensor Circuit
B1469/69 - Infrared Ray Sensor Circuit

DESCRIPTION

The infrared ray sensor, which is installed on the rear roof, detects human body temperature and control the heater and air conditioner "AUTO" mode in 4 zones. Signals are transmitted to the air conditioning amplifier via the LIN communication line. This DTC is output when the temperature of the physical object is detected as -30°C (-22°F) or less, or 80°C (176°F) or more for 10 seconds or more.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (D-IG1-3)

(a) Remove the D-IG1-3 fuse from the driver side junction block.

(b) Measure the resistance of the fuse.

Standard resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (INFRARED RAY SENSOR - BODY GROUND AND BATTERY)





(a) Disconnect the X13 infrared ray sensor connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE INFRARED RAY SENSOR Removal