DTC    B1433/33    Air Outlet Damper Position Sensor Circuit

for Preparation Click here


DESCRIPTION

E109300E01
This sensor detects the position of the air outlet control servomotor and sends the appropriate signals to the A/C amplifier assembly. The position sensor is built in the air outlet control servomotor. The potentiometer's resistance changes as the air outlet control servomotor arm moves.
It outputs voltage (5 V) that is input to terminal 2 (VZ) and terminal 3 (PT) via the variable resistor, and then to the A/C amplifier assembly. The A/C amplifier assembly reads the arm position with the input voltage from the position sensor.

DTC No.
DTC Detecting Condition
Trouble Area
B1433/33
Open or short in power source circuit in air outlet damper position sensor circuit.
  1. Air outlet control servomotor (air outlet damper position sensor)
  2. Harness or connector between air outlet control servomotor and A/C amplifier assembly
  3. A/C amplifier assembly

WIRING DIAGRAM


I036321E08


INSPECTION PROCEDURE

1.READ VALUE OF INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and push the intelligent tester main switch on.

  1. Select the items below in the DATA LIST, and read the displays on the intelligent tester.


DATA LIST / AIR CONDITIONER 
Item
Measurement Item/Display
(Range)
Normal Condition
Diagnostic Note
A/O DAMP POS
Air outlet damper position / min.: -14% max.: 113.5%
Damper is at "FACE": 0%
Damper is at "FACE/FOOT": 33.5%*1, 23.5%*2
Damper is at "FOOT" (Manual): 53.5%*1, 56.5%*2
Damper is at "FOOT" (Auto): 53.5%:1, 56.5%*2
Damper is at "FACE/DEF": 73.5%*1, 76.5%*2
Damper is at "DEF": 100%
Open in the circuit: 50.0%
A/O DAMP TARG
Air outlet damper target position / min.: -14% max.: 113.5%
  1. *1: LHD
  2. *2: RHD

OK:
The display is as specified in the normal condition.


Result:

Result
Proceed to
NG
A
OK (Checking from the PROBLEM SYMPTOM TABLE)
B
OK (Checking from the DTC)
C



B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
A


2.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY


    E109265E22

  1. Remove the A/C amplifier assembly with the connectors still connected.

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

    Voltage:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    A10-8 (TPO) - A10-18 (SG-3)
    		Ignition switch ON
    FACE position
    		3.97 to 4.03 V
    A10-8 (TPO) - A10-18 (SG-3)
    		Ignition switch ON
    DEF position
    		0.97 to 1.03 V
    A10-21 (S5-3) - A10-18 (SG-3)
    		Ignition switch ON
    		4.5 to 5.5 V
    A10-21 (S5-3) - A10-18 (SG-3)
    		Ignition switch OFF
    		Below 1 V

    HINT:
    As the air outlet control servomotor is moved from the "FACE" side to "DEF" side, the voltage decreases gradually without interruption.


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

C
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY
A


3.INSPECT AIR OUTLET CONTROL SERVOMOTOR


    E110735E01

  1. Remove the air outlet control servomotor.

  1. Disconnect the connector from the air outlet control servomotor.

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

    Resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    A22-2 (VZ) - A22-1 (GND)*1
    		Always
    		4.2 to 7.8 kΩ
    A22-1 (VZ) - A22-2 (GND)*2
    		Always
    		4.2 to 7.8 kΩ

    1. *1: LHD
    2. *2: RHD

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

    Resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    A22-3 (PT) - A22-1 (GND)*1
    		DEF position
    		0.8 to 1.6 kΩ
    A22-3 (PT) - A22-1 (GND)*1
    		FACE position
    		3.4 to 6.2 kΩ
    A22-3 (PT) - A22-2 (GND)*2
    		DEF position
    		0.8 to 1.6 kΩ
    A22-3 (PT) - A22-2 (GND)*2
    		FACE position
    		3.4 to 6.2 kΩ

    1. *1: LHD
    2. *2: RHD



    E108925E05

  1. As the air outlet control servomotor is moved from the "DEF" side to "FACE" side, the resistance decreases gradually without interruption.

    HINT:
    For details regarding operation of the servomotor (Click here).



NG
REPLACE AIR INLET CONTROL SERVOMOTOR
OK


4.CHECK HARNESS AND CONNECTOR (AIR OUTLET CONTROL SERVOMOTOR - A/C AMPLIFIER ASSEMBLY)


    E109216E18

  1. Disconnect the connector from the A/C amplifier assembly.

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

    Resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    A10-8 (TPO) - A22-3 (PT)
    		Always
    		Below 1 Ω
    A10-18 (SG-3) - A22-1 (GND)*1
    		Always
    		Below 1 Ω
    A10-18 (SG-3) - A22-2 (GND)*2
    		Always
    		Below 1 Ω
    A10-21 (S5-3) - A22-2 (VZ)*1
    		Always
    		Below 1 Ω
    A10-21 (S5-3) - A22-1 (VZ)*2
    		Always
    		Below 1 Ω
    A10-8 (TPO) - Body ground
    		Always
    		10 kΩ or higher
    A10-18 (SG-3) - Body ground
    		Always
    		10 kΩ or higher
    A10-21 (S5-3) - Body ground
    		Always
    		10 kΩ or higher

    1. *1: LHD
    2. *2: RHD



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY