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)  B143A87  Lost Communication with Air Inlet Damper Control Servo Motor LIN Missing Message  


DESCRIPTION

The air conditioning harness assembly and No. 1 air conditioning radiator damper servo sub-assembly connect the air conditioning amplifier assembly and the No. 1 blower damper servo sub-assembly. The air conditioning amplifier assembly supplies power and sends operation instructions to No. 1 blower damper servo sub-assembly through the air conditioning harness assembly and No. 1 air conditioning radiator damper servo sub-assembly. The No. 1 blower damper servo sub-assembly sends pulse signals to inform the air conditioning amplifier assembly of the damper position.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory
B143A87 Lost Communication with Air Inlet Damper Control Servo Motor LIN Missing Message Diagnosis Condition:

Ignition switch ON


Malfunction Status:

Error or lost communication with No. 1 blower damper servo sub-assembly


Detection Time:

Continuously for 10 seconds or more


·

No. 1 blower damper servo sub-assembly

·

Air conditioning harness assembly


Memorized

DTC Detection Condition Combination Table
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition Ignition switch ON ○ ○
Malfunction Error communication with No. 1 blower damper servo sub-assembly ○ -
Lost communication with No. 1 blower damper servo sub-assembly - ○
Detection Time Continuously for 10 seconds or more Continuously for 10 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

PROCEDURE

1.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 450

Result:
Result Proceed to
B142A88 is output A
B142A88 is not output
(w/ Rear Air Duct) 		B
B142A88 is not output
(w/o Rear Air Duct) 		C



A

GO TO DTC B142A88

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for HEV Model)>B142A88


B

2.INSPECT AIR CONDITIONING HARNESS ASSEMBLY

C

3.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
2.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

REPLACE NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY

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


NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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


3.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

REPLACE NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY

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


NG

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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