RM38T0EC _58 Vehicle Interior _104612 HEATING / AIR CONDITIONING _0601796 AIR CONDITIONING SYSTEM(for HEV Model) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for HEV Model)  B143B7F  Air Inlet Damper Control Servo Motor Actuator Stuck Off  


DESCRIPTION

The No. 1 blower 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 these signals to move the air inlet damper to the appropriate position, which controls the air inlet switching.

The air conditioning amplifier assembly communicates with the servo through a communication/driver IC and wiring assembly called the air conditioning harness assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B143B7F Air Inlet Damper Control Servo Motor Actuator Stuck Off Diagnosis Condition:

No. 1 blower damper servo sub-assembly operating


Malfunction Status:

Damper servo operation request signals are output but the damper position sensor value does not change or abnormal


Detection Time:

Continuously for 30 seconds or more


·

No. 1 blower damper servo sub-assembly

·

Air conditioning harness assembly

·

Air conditioning radiator assembly


Memorized

DTC Detection Condition Combination Table
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition No. 1 blower damper servo sub-assembly operating ○ ○
Malfunction Damper servo operation request signals are output but the damper position sensor value does not change ○ -
Damper servo operation request signals are output but the damper position sensor value is abnormal - ○
Detection Time Continuously for 30 seconds or more Continuously for 30 seconds or more
Trip Count 1 trip 1 trip

HINT:

If the conditions of either of these patterns are detected, a DTC will be stored


WIRING DIAGRAM

w/ Rear Air Duct
E496883E07
4.781,0.479 5.396,0.677 0.615,0.198 10 false B BUS 4.771,1.219 5.385,1.417 0.615,0.198 10 false BUS 4.792,1.938 5.406,2.135 0.615,0.198 10 false BUS G 6.146,1.333 6.542,1.604 0.396,0.271 10 false IC 6,0.458 6.396,0.729 0.396,0.271 10 false +B 4.469,0.365 4.708,0.635 0.24,0.271 10 false 4 4.469,1.115 4.708,1.385 0.24,0.271 10 false 3 4.469,1.844 4.708,2.115 0.24,0.271 10 false 2 4.438,0.573 5.052,0.771 0.615,0.198 10 false z1 4.979,2.552 6.552,3.104 1.573,0.552 10 false Air Conditioning Amplifier Assembly 0.813,7.438 2.594,7.677 1.781,0.24 10 false : LIN Communication Line 3.01,6.385 4.552,6.844 1.542,0.458 10 false Air Conditioning Harness Assembly 4.469,5.823 5.01,6.031 0.542,0.208 10 false B 0.375,6.396 2.323,7.135 1.948,0.74 10 false No. 1 Air Conditioning Radiator Damper Servo Sub-assembly 0.396,3.5 1.5,3.771 1.104,0.271 10 false Front Side Mode 0.344,1.552 1.75,2.115 1.406,0.563 10 false Front Air Mix LH*1 2.927,3.802 3.167,4.073 0.24,0.271 10 false 3 2.927,4.26 3.167,4.531 0.24,0.271 10 false 4 2.917,4.708 3.156,4.979 0.24,0.271 10 false 1 2.927,5.177 3.167,5.448 0.24,0.271 10 false 2 2.927,5.635 3.167,5.906 0.24,0.271 10 false 5 4.479,4.719 4.719,4.99 0.24,0.271 10 false 5 4.479,5.177 4.719,5.448 0.24,0.271 10 false 4 4.469,4.271 4.708,4.542 0.24,0.271 10 false 2 4.469,3.802 4.708,4.073 0.24,0.271 10 false 3 4.469,5.625 4.708,5.896 0.24,0.271 10 false 1 5.188,6.396 6.542,7.219 1.354,0.823 10 false No. 1 Blower Damper Servo Sub-assembly 2.927,5.823 3.542,6.021 0.615,0.198 10 false A 2.917,0.375 3.156,0.646 0.24,0.271 10 false 8 2.917,1.115 3.156,1.385 0.24,0.271 10 false 7 2.917,1.844 3.156,2.115 0.24,0.271 10 false 6 2.042,2.771 2.281,3.042 0.24,0.271 10 false IC 2.521,0.469 2.917,0.74 0.396,0.271 10 false +B 2.438,1.958 3.052,2.156 0.615,0.198 10 false GND 2.51,1.177 3.125,1.375 0.615,0.198 10 false LIN 4.448,1.313 5.063,1.51 0.615,0.198 10 false z1 4.448,2.031 5.063,2.229 0.615,0.198 10 false z1 4.469,5.375 5.01,5.583 0.542,0.208 10 false B 4.469,4.917 5.01,5.125 0.542,0.208 10 false B 4.469,4.469 5.01,4.677 0.542,0.208 10 false B 4.458,3.99 5,4.198 0.542,0.208 10 false B 2.927,5.375 3.542,5.573 0.615,0.198 10 false A 2.927,4.906 3.542,5.104 0.615,0.198 10 false A 2.927,4.448 3.542,4.646 0.615,0.198 10 false A 2.927,3.99 3.542,4.188 0.615,0.198 10 false A 2.917,2.031 3.531,2.229 0.615,0.198 10 false A 2.917,1.302 3.531,1.5 0.615,0.198 10 false A 2.917,0.573 3.531,0.771 0.615,0.198 10 false A 0.344,1.854 1.75,2.417 1.406,0.563 10 false Front Air Mix*2 0.354,5.292 1.76,5.854 1.406,0.563 10 false Front Air Mix RH*1 2.792,7.438 4.573,7.677 1.781,0.24 10 false *1: for Dual Type 4.104,7.438 5.885,7.677 1.781,0.24 10 false *2: for Single Type

w/o Rear Air Duct
E496883E08
4.781,0.479 5.396,0.677 0.615,0.198 10 false BUSB 4.771,1.219 5.385,1.417 0.615,0.198 10 false BUS 4.792,1.938 5.406,2.135 0.615,0.198 10 false BUSG 6.146,1.333 6.542,1.604 0.396,0.271 10 false IC 6,0.458 6.396,0.729 0.396,0.271 10 false +B 4.469,0.365 4.708,0.635 0.24,0.271 10 false 4 4.469,1.115 4.708,1.385 0.24,0.271 10 false 3 4.469,1.844 4.708,2.115 0.24,0.271 10 false 2 4.406,0.583 5.021,0.781 0.615,0.198 10 false m6 4.979,2.552 6.552,3.104 1.573,0.552 10 false Air Conditioning Amplifier Assembly 0.813,7.438 2.594,7.677 1.781,0.24 10 false : LIN Communication Line 3.01,6.385 4.552,6.844 1.542,0.458 10 false Air Conditioning Harness Assembly 0.375,6.396 2.323,7.135 1.948,0.74 10 false No. 1 Air Conditioning Radiator Damper Servo Sub-assembly 0.396,3.5 1.5,3.771 1.104,0.271 10 false Front Side Mode 0.344,1.552 1.75,2.115 1.406,0.563 10 false Front Air Mix LH*1 2.927,3.802 3.167,4.073 0.24,0.271 10 false 3 2.927,4.26 3.167,4.531 0.24,0.271 10 false 4 2.917,4.708 3.156,4.979 0.24,0.271 10 false 1 2.927,5.177 3.167,5.448 0.24,0.271 10 false 2 2.927,5.635 3.167,5.906 0.24,0.271 10 false 5 4.479,4.719 4.719,4.99 0.24,0.271 10 false 5 4.479,5.177 4.719,5.448 0.24,0.271 10 false 4 4.469,4.271 4.708,4.542 0.24,0.271 10 false 2 4.469,3.802 4.708,4.073 0.24,0.271 10 false 3 4.469,5.625 4.708,5.896 0.24,0.271 10 false 1 5.188,6.396 6.542,7.219 1.354,0.823 10 false No. 1 Blower Damper Servo Sub-assembly 2.917,0.375 3.156,0.646 0.24,0.271 10 false 8 2.917,1.115 3.156,1.385 0.24,0.271 10 false 7 2.917,1.844 3.156,2.115 0.24,0.271 10 false 6 2.042,2.771 2.281,3.042 0.24,0.271 10 false IC 0.344,1.854 1.75,2.417 1.406,0.563 10 false Front Air Mix*2 0.354,5.292 1.76,5.854 1.406,0.563 10 false Front Air Mix RH*1 2.792,7.438 4.573,7.677 1.781,0.24 10 false *1: for Dual Type 4.104,7.438 5.885,7.677 1.781,0.24 10 false *2: for Single Type 4.417,1.313 5.031,1.51 0.615,0.198 10 false m6 4.417,2.042 5.031,2.24 0.615,0.198 10 false m6 2.875,0.583 3.49,0.781 0.615,0.198 10 false m4 2.875,1.313 3.49,1.51 0.615,0.198 10 false m4 2.875,2.042 3.49,2.24 0.615,0.198 10 false m4 2.885,3.979 3.5,4.177 0.615,0.198 10 false m4 2.875,4.448 3.49,4.646 0.615,0.198 10 false m4 2.885,4.896 3.5,5.094 0.615,0.198 10 false m4 2.885,5.354 3.5,5.552 0.615,0.198 10 false m4 2.885,5.802 3.5,6 0.615,0.198 10 false m4 4.417,3.979 5.031,4.177 0.615,0.198 10 false m1 4.417,4.458 5.031,4.656 0.615,0.198 10 false m1 4.417,4.896 5.031,5.094 0.615,0.198 10 false m1 4.427,5.365 5.042,5.563 0.615,0.198 10 false m1 4.417,5.813 5.031,6.01 0.615,0.198 10 false m1

CAUTION / NOTICE / HINT

NOTICE:
·

This DTC is also output for the damper link, damper lock, etc. Before performing inspection, perform servomotor initialization and check that there are no mechanical malfunctions.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HEV Model)>INITIALIZATION

·

This DTC is also output when servomotor initialization has failed. When servomotor initialization has failed, repair any malfunctions and perform servomotor initialization again.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HEV Model)>INITIALIZATION



PROCEDURE

1.CHECK NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY
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

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

NG

INSTALL NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY

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


2.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

3.PERFORM ACTIVE TEST USING GTS

NG

REMOVE PINCHED WIRE HARNESS

3.PERFORM ACTIVE TEST 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 Servo Motor No. 1 blower damper servo sub-assembly operation Min.: 128
Max.: 384 		Operates between 220 to 256
Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Air Inlet Damper Control Servo Motor Actual Pulse No. 1 blower damper servo sub-assembly actual pulse Min.: 128
Max.: 384
·

Fresh: 220 (pulse)

·

Recirculation: 256 (pulse)


-
Body Electrical > Air Conditioner > Active Test
Active Test Display
Air Inlet Damper Control Servo Motor
Data List Display
Air Inlet Damper Control Servo Motor Actual Pulse
50004 450 32 213
OK:

The value of the Data List changes in accordance with the operation of the Active Test.



Result:
Proceed to
OK
NG



OK

4.PERFORM ACTIVE TEST USING GTS

NG

5.PERFORM ACTIVE TEST USING GTS
4.PERFORM ACTIVE TEST 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 Servo Motor No. 1 blower damper servo sub-assembly operation Min.: 128
Max.: 384 		Operates between 220 to 256
Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Air Inlet Damper Control Servo Motor Target Pulse No. 1 blower damper servo sub-assembly target pulse Min.: 128
Max.: 384
·

Fresh: 220 (pulse)

·

Recirculation: 256 (pulse)


-
Air Inlet Damper Control Servo Motor Actual Pulse No. 1 blower damper servo sub-assembly actual pulse Min.: 128
Max.: 384
·

Fresh: 220 (pulse)

·

Recirculation: 256 (pulse)


-
Body Electrical > Air Conditioner > Active Test
Active Test Display
Air Inlet Damper Control Servo Motor
Data List Display
Air Inlet Damper Control Servo Motor Target Pulse
Air Inlet Damper Control Servo Motor Actual Pulse
50004 450 32 212,213
OK:

The target pulse value of the Data List matches the actual pulse.



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

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


NG

8.REPLACE NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY
5.PERFORM ACTIVE TEST 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
Front Air Outlet Damper Control Servo Motor No. 1 air conditioning radiator damper servo sub-assembly operation Min.: 128
Max.: 384 		Operates between 256 to 320 pulses
Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Front Air Outlet Damper Control Servo Motor Actual Pulse No. 1 air conditioning radiator damper servo sub-assembly target pulse Min.: 128
Max.: 384
·

FACE: 256 (pulse)

·

B/L: 267 (pulse)

·

FOOT-A: 288 (pulse)

·

FOOT-R (F): 297 (pulse)

·

FOOT-D: 305 (pulse)

·

F/D-R: 320 (pulse)

·

D/F: 339 (pulse)

·

DEF: 348 (pulse)


-
Body Electrical > Air Conditioner > Active Test
Active Test Display
Front Air Outlet Damper Control Servo Motor
Data List Display
Front Air Outlet Damper Control Servo Motor Actual Pulse
50004 450 47 243
OK:

The value of the Data List changes in accordance with the operation of the Active Test.



Result:
Result Proceed to
OK (w/ Rear Air Duct) A
OK (w/o Rear Air Duct) B
NG C



A

6.INSPECT AIR CONDITIONING HARNESS ASSEMBLY

B

7.INSPECT AIR CONDITIONING HARNESS ASSEMBLY

C

10.CHECK BLOWER ASSEMBLY
6.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

Disconnect the A No. 1 air conditioning radiator damper servo sub-assembly connector.


b.

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


c.

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

E483148C16
1.677,0.615 2.042,0.833 0.365,0.219 5.073,0.667 5.458,0.896 0.385,0.229 0.948,0.448 1.26,0.604 0.313,0.156 10 false *a 4.469,0.448 4.781,0.604 0.313,0.156 10 false *b 1.813,0.635 2.531,0.896 0.719,0.26 10 false A 5.219,0.708 5.646,0.906 0.427,0.198 10 false B
*a Front view of wire harness connector
(to No. 1 Air Conditioning Radiator Damper Servo Sub-assembly) 		*b Front view of wire harness connector
(to No. 1 Blower Damper Servo Sub-assembly)


Standard Resistance:
Tester Connection Condition Specified Condition
A-1 - B-5 Always Below 1 Ω
A-2 - B-4 Always Below 1 Ω
A-3 - B-3 Always Below 1 Ω
A-4 - B-2 Always Below 1 Ω
A-5 - B-1 Always Below 1 Ω
A-1 or B-5 - Other terminals and body ground Always 10 kΩ or higher
A-2 or B-4 - Other terminals and body ground Always 10 kΩ or higher
A-3 or B-3 - Other terminals and body ground Always 10 kΩ or higher
A-4 or B-2 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

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

NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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


7.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

Disconnect the m4 No. 1 air conditioning radiator damper servo sub-assembly connector.


b.

Disconnect the m1 No. 1 blower damper servo sub-assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
m4-1 - m1-5 Always Below 1 Ω
m4-2 - m1-4 Always Below 1 Ω
m4-3 - m1-3 Always Below 1 Ω
m4-4 - m1-2 Always Below 1 Ω
m4-5 - m1-1 Always Below 1 Ω
m4-1 or m1-5 - Other terminals and body ground Always 10 kΩ or higher
m4-2 or m1-4 - Other terminals and body ground Always 10 kΩ or higher
m4-3 or m1-3 - Other terminals and body ground Always 10 kΩ or higher
m4-4 or m1-2 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

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

NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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


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

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

Result:
Proceed to
NEXT



NEXT

9.PERFORM ACTIVE TEST USING GTS
9.PERFORM ACTIVE TEST 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 Servo Motor No. 1 blower damper servo sub-assembly operation Min.: 128
Max.: 384 		Operates between 220 to 256
Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Air Inlet Damper Control Servo Motor Actual Pulse No. 1 blower damper servo sub-assembly actual pulse Min.: 128
Max.: 384
·

Fresh: 220 (pulse)

·

Recirculation: 256 (pulse)


-
Body Electrical > Air Conditioner > Active Test
Active Test Display
Air Inlet Damper Control Servo Motor
Data List Display
Air Inlet Damper Control Servo Motor Actual Pulse
50004 450 32 213
OK:

The value of the Data List changes in accordance with the operation of the Active Test.



Result:
Proceed to
OK
NG



OK

END

NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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


10.CHECK BLOWER ASSEMBLY
a.

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

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


b.

Operate the air inlet dampers by hand.

OK:

The air inlet dampers are easily operated by hand.



Result:
Proceed to
OK
NG



OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


NG

REPLACE BLOWER ASSEMBLY

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