Air Conditioning System

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

DTC B1469/69 - Infrared Ray Sensor Circuit

DESCRIPTION

The infrared ray sensor, which is installed on the rear roof, detects human body temperature and controls 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 according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE FUSE
OK -- Continue to next step.
2. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (IR SENSOR)
(a) Use the Data List to check if the infrared rays sensors are functioning properly.
(1) Intelligent tester

AIR CONDITIONER

(2) Techstream

Air Conditioner

OK:
The display is as specified in the normal condition.
NG -- CHECK HARNESS AND CONNECTOR (INFRARED RAY SENSOR - BODY GROUND AND BATTERY)
OK -- REPLACE AIR CONDITIONING AMPLIFIER
3. 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:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE INFRARED RAY SENSOR