Dtc 42 Air Inlet Damper Control Servo Motor Circuit

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Heating Air Conditioning. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTUATOR CHECK

CHECK HARNESS AND CONNECTOR (RECIRCULATION DAMPER SERVO - AIR CONDITIONING AMPLIFIER)

REPLACE RECIRCULATION DAMPER SERVO SUB-ASSEMBLY

DTC 42 Air Inlet Damper Control Servo Motor Circuit


DESCRIPTION

The recirculation damper servo sub-assembly sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on the signals to move the air inlet control damper to any position, which controls the intake air settings.
HINT:
This DTC is also output if the air inlet control damper and damper link are malfunctioning or unable to move properly. When this DTC is output, confirm that the mechanical parts of the damper and damper link are not defective or damaged.

DTC Code
Detection Item
Trouble Area
42
The air inlet control damper position does not change when the air conditioning amplifier assembly operates the recirculation damper servo sub-assembly.
  1. Recirculation damper servo sub-assembly
  2. Harness or connector
  3. Air conditioning amplifier assembly

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 42 Air Inlet Damper Control Servo Motor Circuit


INSPECTION PROCEDURE

1.PERFORM ACTUATOR CHECK

  1. Remove the glove box to visually check the recirculation damper servo sub-assembly operation (HILUX_TGN26 RM000003R7I00IX.html).

  1. Enter actuator check mode (HILUX_TGN26 RM000003O1100QX.html).

  1. Check that the air inlet control damper position changes according to the display code.

    Display Code
    		Air Inlet Control Damper Position
    0
    		Fresh
    1
    		Fresh
    2
    		Recirculation/fresh
    (50%)
    3
    		Recirculation
    4
    		Recirculation
    5
    		Fresh
    6
    		Fresh
    7
    		Recirculation
    8
    		Fresh
    9
    		Fresh
    OK:
    Air inlet control damper position changes in accordance with each display code.
    HINT:
    The progression through the steps of the actuator check can be changed from automatic to manual by pressing the front DEF switch.
    Result
    Result
    		Proceed to
    OK (When troubleshooting according to problem symptoms table.)
    		A
    OK (When troubleshooting according to DTC.)
    		B
    NG
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (HILUX_TGN26 RM000001K3A024X.html)

C
Go to step 2
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM0000045E301VX.html)

2.CHECK HARNESS AND CONNECTOR (RECIRCULATION DAMPER SERVO - AIR CONDITIONING AMPLIFIER)

  1. Disconnect the G143 recirculation damper servo sub-assembly connector.

  1. Disconnect the G94 and G95 air conditioning amplifier assembly connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G143-5 (REC) - G94-22 (AIR)
    		Always
    		Below 1 Ω
    G143-4 (FRS) - G94-23 (AIF)
    G143-2 (B) - G95-17 (PIA)
    G143-3 (L) - G95-16 (AGND)
    G143-1 (SG) - G95-21 (AUXO)
    G143-5 (REC) - Body ground
    		Always
    		10 kΩ or higher
    G143-4 (FRS) - Body ground
    G143-2 (B) - Body ground
    G143-3 (L) - Body ground
    G143-1 (SG) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE RECIRCULATION DAMPER SERVO SUB-ASSEMBLY

  1. Temporally replace the recirculation damper servo sub-assembly with a new or normally functioning one (HILUX_TGN26 RM0000012JQ02TX.html).

  1. Check the air inlet control damper operates normally.

    OK:
    Air inlet control damper operates normally.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (HILUX_TGN26 RM000001K3A024X.html)
OK

END (RECIRCULATION DAMPER SERVO IS DEFECTIVE)