AIR CONDITIONING SYSTEM, Diagnostic DTC:B1469/69

DTC Code DTC Name
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.

DTC No. DTC Detection Condition Trouble Area
B1469/69 Open or short in infrared ray sensor circuit

  • Fuse

  • Infrared ray sensor

  • Harness and connector of infrared ray sensor

WIRING DIAGRAM

A01GNJ1E16

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSE (D-IG1-5)


    1. Remove the D-IG1-5 fuse from the main body ECU (driver side junction block).

    2. Measure the resistance of the fuse.

      Standard resistance
      Tester Connection Condition Specified Condition
      D-IG1-5 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

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

    A01GK0OE01

    1. Disconnect the X13 infrared ray sensor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      X13-1 (E) - Body ground Always 10 kΩ or higher

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      X13-5 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE INFRARED RAY SENSOR Click here