Dtc 41 Air Mix Damper Control Servo Motor Circuit (Passenger Side)


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTUATOR CHECK

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

CHECK AIR MIX DAMPER SERVO SUB-ASSEMBLY (AIR MIX DAMPER SERVO MOTOR)

DTC 41 Air Mix Damper Control Servo Motor Circuit (Passenger Side)


DESCRIPTION

The air mix setting is controlled as follows:
The air mix damper servo (air mix damper servo motor) sends the air mix damper position as a pulse signal to the air conditioning amplifier. Then the air conditioning amplifier uses the pulse to determine how much the servo motor should be rotated forward/backward, and moves the air mix damper to the appropriate position.
HINT:
This DTC is also output if the 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
41
Air mix damper control servo motor activation request signal is output, but servo motor position data does not change or is inaccurate
  1. Air mix damper servo sub-assembly (Air mix damper servo motor)
  2. Harness or connector
  3. Air conditioning amplifier assembly

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 41 Air Mix Damper Control Servo Motor Circuit (Passenger Side)


INSPECTION PROCEDURE

1.PERFORM ACTUATOR CHECK

  1. Warm up the engine.

  1. Enter actuator check mode (Toyota Fortuner RM000003PQ3001X.html).

  1. Press the DEF switch to change to the step operation (Toyota Fortuner RM000003PQ1001X.html).

  1. Press the DEF switch to check the air flow by hand.

    Display Code
    		Air Mix Damper Position
    0
    		COOL side (0% open)
    1
    		COOL side (0% open)
    2
    		COOL side (0% open)
    3
    		COOL side (0% open)
    4
    		COOL/HOT (50% open)
    5
    		COOL/HOT (50% open)
    6
    		HOT side (100% open)
    7
    		HOT side (100% open)
    8
    		HOT side (100% open)
    9
    		HOT side (100% open)
    OK:
    Air mix damper position changes in accordance with each display code.
    Result
    Result
    		Proceed to
    OK (Checking from the PROBLEM SYMPTOMS TABLE)
    		A
    OK (Checking from the DTC)
    		B
    NG
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Toyota Fortuner RM0000012KH002X.html)

C
Go to step 2
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Toyota Fortuner RM000003S6F000X.html)

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


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 41 Air Mix Damper Control Servo Motor Circuit (Passenger Side)

  1. Disconnect the D15 servo connector.

  1. Disconnect the A16 and A15 amplifier connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D15-5 (MHD) - A16-17 (AMH)
    		Always
    		Below 1 Ω
    D15-4 (MCD) - A16-19 (AMC)
    D15-3 (MHP) - A15-23 (PMB)
    D15-2 (MCP) - A15-24 (PMA)
    D15-1 (SG) - A15-20 (SG-1)
    D15-1 (SG) - Body ground
    		Always
    		10 kΩ or higher
    D15-2 (MCP) - Body ground
    D15-3 (MHP) - Body ground
    D15-4 (MCD) - Body ground
    D15-5 (MHD) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK AIR MIX DAMPER SERVO SUB-ASSEMBLY (AIR MIX DAMPER SERVO MOTOR)

  1. Check if the malfunction disappears when a normally functioning air mix damper servo (air mix damper servo motor) is installed.

    OK:
    Air mix control damper operates normally.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Toyota Fortuner RM0000012KH002X.html)
OK

REPLACE AIR MIX DAMPER SERVO SUB-ASSEMBLY (AIR MIX DAMPER SERVO MOTOR) (Toyota Fortuner RM0000012JQ00BX.html)