RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0598792 AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE))  B143B7F  Air Inlet Damper Control Servo Motor Actuator Stuck Off  


DESCRIPTION

The air conditioning amplifier assembly controls the opening angle and rotates the motor of the No. 1 blower damper servo sub-assembly in accordance with the calculated target opening angle.

Also, the air conditioning amplifier assembly monitors the opening angle of the No. 1 blower damper servo sub-assembly, and when the target opening angle is not reached, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B143B7F Air Inlet Damper Control Servo Motor Actuator Stuck Off When it is detected that the accumulated drive time when being driven in one direction becomes 30 seconds or more
·

No. 1 blower damper servo sub-assembly

·

Air conditioning harness assembly

·

Air conditioning amplifier assembly

·

Air conditioning radiator assembly


Memorized

WIRING DIAGRAM

E512190E04
4.323,0.365 4.781,0.563 0.458,0.198 10 false z26 4.323,1.156 4.781,1.354 0.458,0.198 10 false z26 4.323,1.552 4.781,1.75 0.458,0.198 10 false z26 4.313,1.948 4.771,2.146 0.458,0.198 10 false z26 4.323,2.344 4.781,2.542 0.458,0.198 10 false z26 2.26,0.365 2.417,0.563 0.156,0.198 10 false A 2.26,1.167 2.417,1.365 0.156,0.198 10 false A 2.26,1.563 2.417,1.76 0.156,0.198 10 false A 2.26,1.948 2.417,2.146 0.156,0.198 10 false A 2.26,2.333 2.417,2.531 0.156,0.198 10 false A 6.208,0.771 6.365,0.969 0.156,0.198 10 false IC 6.208,1.948 6.365,2.146 0.156,0.198 10 false IC 6.156,1.542 6.531,1.74 0.375,0.198 10 false +5 V 6.156,2.333 6.677,2.583 0.521,0.25 10 false GND 4.354,0.167 4.667,0.365 0.313,0.198 10 false 18 4.354,0.948 4.667,1.146 0.313,0.198 10 false 19 4.354,1.365 4.667,1.563 0.313,0.198 10 false 14 4.385,1.75 4.698,1.948 0.313,0.198 10 false 4 4.354,2.146 4.667,2.344 0.313,0.198 10 false 16 4.708,0.25 5.167,0.448 0.458,0.198 10 false REC 4.719,1.042 5.177,1.24 0.458,0.198 10 false FRS 4.719,1.417 5.51,1.635 0.792,0.219 10 false S5-Pots 4.719,1.823 6.25,2.021 1.531,0.198 10 false R/F_pot 4.719,2.208 6.25,2.406 1.531,0.198 10 false SG-Pots/TE 4.656,2.781 6.969,3.115 2.313,0.333 10 false Air Conditioning Amplifier Assembly 2.563,2.76 4.083,3.25 1.521,0.49 10 false Air Conditioning Harness assembly 0.354,2.75 2.042,3.344 1.688,0.594 10 false No. 1 Blower Damper Servo Sub-assembly 1.708,2.219 2.167,2.417 0.458,0.198 10 false GND 1.823,1.833 2.281,2.031 0.458,0.198 10 false Pt 1.823,1.438 2.281,1.635 0.458,0.198 10 false Vz 1.75,1.042 2.208,1.24 0.458,0.198 10 false FRS 1.729,0.25 2.188,0.448 0.458,0.198 10 false REC 2.271,0.948 2.583,1.146 0.313,0.198 10 false 4 2.271,0.167 2.583,0.365 0.313,0.198 10 false 5 2.271,1.365 2.583,1.563 0.313,0.198 10 false 3 2.271,1.75 2.583,1.948 0.313,0.198 10 false 2 2.26,2.156 2.573,2.354 0.313,0.198 10 false 1

PROCEDURE

1.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450
HINT:

Check whether a DTC is output for another servo motor.



Result:
Result Proceed to
Only B143B7F is output A
B13AB7F, B14037F or B14067F are output B



A

2.CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY (INSTALLATION CONDITION)

B

9.CHECK FOR DTC
2.CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY (INSTALLATION CONDITION)
a.

Check that the No. 1 blower damper servo sub-assembly is installed correctly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER UNIT>REASSEMBLY

OK:

The No. 1 blower damper servo sub-assembly is installed correctly.



Result:
Proceed to
OK
NG



OK

3.CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY (MOTOR, LINK, DAMPER)

NG

REINSTALL NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER UNIT>REASSEMBLY


3.CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY (MOTOR, LINK, DAMPER)
a.

Check for a wire harness caught between the links of the motors and dampers.

OK:

No wire harnesses are caught between the links of the motors and dampers.



Result:
Proceed to
OK
NG



OK

4.READ VALUE USING GTS

NG

REMOVE PINCHED WIRE HARNESS

4.READ VALUE USING GTS
a.

Using the GTS, perform the following Active Test and read the Data List value.

Body Electrical > Air Conditioner > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Air Inlet Damper Control Motor (Potentio) This test activates the air inlet damper control motor (potentio).
(No. 1 blower damper servo sub-assembly) 		0 %: Min
100 %: Max 		Operate with the ignition switch ON.
Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Air Inlet Damper Control Motor Target Opening (Potentio) No. 1 blower damper servo sub-assembly target opening (potentio) 0 to 100.00 %
·

Recirculation: 0 %

·

Fresh: 100 %


No. 1 blower damper servo sub-assembly circuit malfunction
Air Inlet Damper Control Motor Actual Opening (Potentio) No. 1 blower damper servo sub-assembly target opening (potentio) -327.68 to 327.68 %
·

Recirculation: 0 %

·

Fresh: 100 %


No. 1 blower damper servo sub-assembly circuit malfunction
Body Electrical > Air Conditioner > Active Test
Active Test Display
Air Inlet Damper Control Motor (Potentio)
Data List Display
Air Inlet Damper Control Motor Target Opening (Potentio)
Air Inlet Damper Control Motor Actual Opening (Potentio)
50004 450 84 450,451
OK:

The value of the Data List changes in accordance with the changes of the Active Test and the actual value matches the target opening angle of the Data List.


Result:
Result Proceed to
OK A
NG (The value of the Data List changes in accordance with the changes of the Active Test, but the actual value does not match the target opening angle of the Data List.) B
NG (The value of the Data List does not change in accordance with the changes of the Active Test) C




A

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


B

5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (SIGNAL SYSTEM)

C

7.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (MOTOR DRIVE SYSTEM)
5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (SIGNAL SYSTEM)
a.

Disconnect the A No. 1 blower damper servo sub-assembly connector.

E512292C11
1.667,0.271 2.042,0.469 0.375,0.198 5.115,0.25 5.49,0.448 0.375,0.198 1.052,1.76 1.427,1.615 true 1.469,1.99 1.667,1.688 true 1.865,2.177 1.865,1.688 true 4.271,1.073 4.813,1.333 true 5.125,2.24 5.125,1.656 true 4.375,2.104 4.76,1.646 true 1.24,0.281 1.552,0.438 0.313,0.156 10 false *a 4.521,0.26 4.833,0.417 0.313,0.156 10 false *b 1.802,0.292 1.958,0.49 0.156,0.198 10 false A 5.188,0.271 5.854,0.521 0.667,0.25 10 false z26 0.708,1.708 1.167,1.906 0.458,0.198 10 false GND 1.313,2.031 1.635,2.292 0.323,0.26 10 false Pt 1.792,2.208 2.25,2.406 0.458,0.198 10 false Vz 3.74,0.969 4.698,1.188 0.958,0.219 10 false R/F_pot 4.031,2.125 4.656,2.344 0.625,0.219 10 false S5-Pots 4.781,2.281 5.729,2.51 0.948,0.229 10 false SG-Pots/TE
*a Front view of air conditioning harness assembly connector
(to No. 1 Blower Damper Servo Sub-assembly) 		*b Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly)



b.

Disconnect the z26 air conditioning amplifier assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A-3 (Vz) - z26-14 (S5-Pots) Always Below 1 Ω
A-2 (Pt) - z26-4 (R/F_pot) Always Below 1 Ω
A-1 (GND) - z26-16 (SG-Pots/TE) Always Below 1 Ω
A-3 (Vz) or z26-14 (S5-Pots) - Other terminals and body ground Always 10 kΩ or higher
A-2 (Pt) or z26-4 (R/F_pot) - Other terminals and body ground Always 10 kΩ or higher
A-1 (GND) or z26-16 (SG-Pots/TE) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

6.INSPECT AIR CONDITIONING RADIATOR ASSEMBLY (DAMPER)

NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for HV Model)>DISASSEMBLY


6.INSPECT AIR CONDITIONING RADIATOR ASSEMBLY (DAMPER)
a.

Remove the No. 1 blower damper servo sub-assembly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER UNIT>DISASSEMBLY


b.

Operate the damper by hand.

OK:

The damper lightly operates by hand.



Result:
Proceed to
OK
NG



OK

REPLACE NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER UNIT>DISASSEMBLY


NG

REPAIR OR REPLACE BLOWER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER UNIT>REMOVAL


7.INSPECT AIR CONDITIONING HARNESS ASSEMBLY (MOTOR DRIVE SYSTEM)
a.

Disconnect the A No. 1 blower damper servo sub-assembly connector.

E512292C12
1.667,0.271 2.042,0.469 0.375,0.198 5.115,0.25 5.49,0.448 0.375,0.198 2.281,1.99 2.073,1.688 true 2.625,1.74 2.26,1.635 true 6.104,2.021 5.49,1.646 true 5.813,2.125 5.365,1.646 true 1.24,0.281 1.552,0.438 0.313,0.156 10 false *a 4.521,0.26 4.833,0.417 0.313,0.156 10 false *b 1.802,0.292 1.958,0.49 0.156,0.198 10 false A 5.188,0.271 5.854,0.521 0.667,0.25 10 false z26 2.677,1.667 3.135,1.865 0.458,0.198 10 false REC 2.25,2.031 2.771,2.24 0.521,0.208 10 false FRS 5.865,2.115 6.49,2.333 0.625,0.219 10 false REC 6.167,1.958 6.792,2.177 0.625,0.219 10 false FRS
*a Front view of air conditioning harness assembly connector
(to No. 1 Blower Damper Servo Sub-assembly) 		*b Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly)



b.

Disconnect the z26 air conditioning amplifier assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A-5 (REC) - z26-18 (REC) Always Below 1 Ω
A-4 (FRS) - z26-19 (FRS) Always Below 1 Ω
A-5 (REC) or z26-18 (REC) - Other terminals and body ground Always 10 kΩ or higher
A-4 (FRS) or z26-19 (FRS) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

8.INSPECT NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY

NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>BLOWER UNIT>DISASSEMBLY


9.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450
HINT:

Check whether an evaporator temp. sensor (No. 1 cooler thermistor) DTC is output.



Result:
Result Proceed to
P053511 and P053515 are not output A
P053511 is output B
P053515 is output C



A

10.INSPECT AIR CONDITIONING HARNESS ASSEMBLY

B

GO TO DTC P053511

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HV Model (8ZR-FXE))>P053511


C

GO TO DTC P053515

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HV Model (8ZR-FXE))>P053515


10.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

Disconnect the A No. 1 blower damper servo sub-assembly connector.

E512292C04
1.667,0.271 2.042,0.469 0.375,0.198 5.115,0.25 5.49,0.448 0.375,0.198 1.052,1.76 1.427,1.615 true 1.469,1.99 1.667,1.688 true 1.865,2.177 1.865,1.688 true 2.281,1.99 2.073,1.688 true 2.625,1.74 2.26,1.635 true 6.104,2.021 5.49,1.646 true 5.813,2.125 5.365,1.646 true 4.271,1.073 4.813,1.333 true 5.125,2.24 5.125,1.656 true 4.375,2.104 4.76,1.646 true 1.24,0.281 1.552,0.438 0.313,0.156 10 false *a 4.521,0.26 4.833,0.417 0.313,0.156 10 false *b 1.802,0.292 1.958,0.49 0.156,0.198 10 false A 5.188,0.271 5.854,0.521 0.667,0.25 10 false z26 0.708,1.708 1.167,1.906 0.458,0.198 10 false GND 1.313,2.031 1.635,2.292 0.323,0.26 10 false Pt 1.792,2.208 2.25,2.406 0.458,0.198 10 false Vz 2.677,1.667 3.135,1.865 0.458,0.198 10 false REC 2.25,2.031 2.771,2.24 0.521,0.208 10 false FRS 3.74,0.969 4.698,1.188 0.958,0.219 10 false R/F_pot 4.031,2.125 4.656,2.344 0.625,0.219 10 false S5-Pots 4.781,2.281 5.729,2.51 0.948,0.229 10 false SG-Pots/TE 5.865,2.115 6.49,2.333 0.625,0.219 10 false REC 6.167,1.958 6.792,2.177 0.625,0.219 10 false FRS
*a Front view of air conditioning harness assembly connector
(to No. 1 Blower Damper Servo Sub-assembly) 		*b Front view of air conditioning harness assembly connector
(to Air Conditioning Amplifier Assembly)



b.

Disconnect the z26 air conditioning amplifier assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A-5 (REC) - z26-18 (REC) Always Below 1 Ω
A-4 (FRS) - z26-19 (FRS) Always Below 1 Ω
A-3 (Vz) - z26-14 (S5-Pots) Always Below 1 Ω
A-2 (Pt) - z26-4 (R/F_pot) Always Below 1 Ω
A-1 (GND) - z26-16 (SG-Pots/TE) Always Below 1 Ω
A-5 (REC) or z26-18 (REC) - Other terminals and body ground Always 10 kΩ or higher
A-4 (FRS) or z26-19 (FRS) - Other terminals and body ground Always 10 kΩ or higher
A-3 (Vz) or z26-14 (S5-Pots) - Other terminals and body ground Always 10 kΩ or higher
A-2 (Pt) or z26-4 (R/F_pot) - Other terminals and body ground Always 10 kΩ or higher
A-1 (GND) or z26-16 (SG-Pots/TE) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING AMPLIFIER>REMOVAL


NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for HV Model)>DISASSEMBLY