AIR CONDITIONING SYSTEM, Diagnostic DTC:B1416/16

DTC Code DTC Name
B1416/16 Passenger Side Duct Sensor

DESCRIPTION

The air duct sensor (for passenger side) detects the register temperature and sends the appropriate signals to the air conditioning amplifier.

DTC No. Detection item Trouble Area
B1416/16

Air duct sensor circuit (for passenger side)

(Open or short)

  • Air duct sensor (for passenger side)

  • Harness and connector between duct sensor and air conditioning amplifier

  • Air conditioning amplifier

WIRING DIAGRAM

A01GLE0E04

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (DUCT SENSOR (for Passenger Side))


    1. Use the Data List to check if the duct sensor (for passenger side) is functioning properly.

      Air Conditioner
      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      Duct Sensor (P Side)

      Duct sensor (for passenger side) /

      Min.: -12.7°C (9.14°F)

      Max.: 76.55°C (169.79°F)

      		 Actual duct temperature is displayed (for passenger side) -
      OK
      The display is as specified in the normal condition.
      Result
      Result Proceed to
      NG A
      OK (Checking from the PROBLEM SYMPTOMS TABLE) B
      OK (Checking from the DTC) C

    B

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    REPLACE AIR CONDITIONING AMPLIFIER Click here

    A

  2. CHECK AIR CONDITIONING AMPLIFIER (TFAR - SG-3, TFAL - SG-2 VOLTAGE)

    A01GKL6E01

    1. Remove the air conditioning amplifier with its connectors still connected Click here.

    2. Turn the engine switch on (IG).

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      L77-22 (TFAR) - L77-11 (SG-3) Engine switch on (IG) at 25°C (77°F) 1.8 to 2.2 V
      Engine switch on (IG) at 50°C (122°F) 0.8 to 1.2 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      L77-21 (TFAL) - L77-12 (SG-2) Engine switch on (IG) at 25°C (77°F) 1.8 to 2.2 V
      Engine switch on (IG) at 50°C (122°F) 0.8 to 1.2 V

      Tech Tips

      As the temperature increases, the voltage decreases.

      Result
      Result Proceed to
      NG A

      OK

      (Checking from the PROBLEM SYMPTOMS TABLE)

      		 B
      OK (Checking from the DTC) C

    B

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    REPLACE AIR CONDITIONING AMPLIFIER Click here

    A

  3. CHECK AIR DUCT SENSOR

    A01GN2NE04

    1. Remove the air duct sensor Click here.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 0°C (32°F) 14.5 to 19.0 kΩ
      25°C (77°F) 4.8 to 5.2 kΩ
      50°C (122°F) 1.6 to 2.0 kΩ

      Tech Tips

      As the temperature increases, the resistance decreases.


    NG

    REPLACE AIR DUCT SENSOR Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - AIR DUCT SENSOR)

    A01GKT9E08

    1. Disconnect the L87*1 or L14*2 air duct sensor connector.

    2. Disconnect the L77 air conditioning amplifier connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      L77-22 (TFAR) - L87-1 Always Below 1 Ω
      L77-11 (SG-3) - L87-2 Always Below 1 Ω
      L77-22 (TFAR) - Body ground Always 10 kΩ or higher
      L77-11 (SG-3) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      L77-21 (TFAL) - L14-1 Always Below 1 Ω
      L77-12 (SG-2) - L14-2 Always Below 1 Ω
      L77-21 (TFAL) - Body ground Always 10 kΩ or higher
      L77-12 (SG-2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER Click here