RM36D0EC _58 Vehicle Interior _083104 HEATING / AIR CONDITIONING _0402828 AIR CONDITIONING SYSTEM(for Gasoline Model) C

HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for Gasoline Model) B145B7F Front Right Air Mix Damper Control Servo Motor Actuator Stuck Off

DESCRIPTION

The No. 1 air conditioning radiator 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 outlet damper to the appropriate position, which controls the rear air outlet 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
B145B7F	Front Right Air Mix Damper Control Servo Motor Actuator Stuck Off	Diagnosis Condition: During No. 1 air conditioning radiator damper servo sub-assembly operation Malfunction Status: The damper servo operation request signal is output but the position information of the servo does not change or servo is malfunctioning Detection Time: Continuously for 30 seconds or more	· No. 1 air conditioning radiator damper servo sub-assembly · Air conditioning harness assembly · Air conditioning radiator assembly · Air conditioning amplifier assembly	Memorized

DTC Detection Condition Combination Table
		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	No. 1 air conditioning radiator damper servo sub-assembly operating	○	○
Malfunction	Damper servo operation request signals are output but the damper position sensor value does not change	○	-
Malfunction	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

5.042,0.708 5.813,0.906 0.771,0.198 10 false BUS 5.042,1.094 5.813,1.292 0.771,0.198 10 false B BUS 5.052,1.49 5.823,1.688 0.771,0.198 10 false BUS G 4.76,0.677 5.01,0.875 0.25,0.198 10 false 3 4.76,1.104 5.01,1.302 0.25,0.198 10 false 4 4.771,1.479 5.021,1.677 0.25,0.198 10 false 2 1.042,0.75 1.75,1.188 0.708,0.438 10 false Driver Side Air Mix*1 0.74,3.938 1.844,4.156 1.104,0.219 10 false Front Mode 0.771,4.896 2.688,5.563 1.917,0.667 10 false No. 1 Air Conditioning Radiator Damper Servo Sub-assembly 0.875,7.5 2.573,8 1.698,0.5 10 false No. 1 Blower Damper Servo Sub-assembly 3.156,7.438 4.698,7.875 1.542,0.438 10 false Air Conditioning Harness Assembly 4.729,8.083 5.5,8.281 0.771,0.198 10 false z11 4.719,8.25 6.99,8.5 2.271,0.25 10 false Air Conditioning Amplifier Assembly 0.885,8.563 3.26,8.823 2.375,0.26 10 false : LIN Communication Line 6.021,0.823 6.792,1.021 0.771,0.198 10 false IC 6.333,0.938 7.104,1.135 0.771,0.198 10 false +B 0.75,2.448 1.823,2.802 1.073,0.354 10 false Front Passenger Side Air Mix*1 0.167,8.031 3.219,8.313 3.052,0.281 10 false *1: for Automatic Air Conditioning System 1.146,1.438 1.833,1.635 0.688,0.198 10 false Air Mix*2 0.177,8.302 3.229,8.583 3.052,0.281 10 false *2: for Manual Air Conditioning System

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.

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·

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

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PROCEDURE

1.CHECK FOR DTC

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes: 50001 450

Result:

Result	Proceed to
B145B7F is output	A
DTCs in conjunction with No. 4 air conditioning radiator damper servo sub-assembly are output at same time	B

2.CHECK NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (INSTALLATION CONDITION)

REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

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2.CHECK NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (INSTALLATION CONDITION)

Check that the No. 1 air conditioning radiator damper servo sub-assembly is installed correctly.

HINT:: for M20C-FKS:Vehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for M20C-FKS)>REASSEMBLY202004,999999,_58,_083104,_0417475,RM100000001MEMO,

for M20D-FKS:Vehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for M20D-FKS)>REASSEMBLY201910,999999,_58,_083104,_0403509,RM100000001JST6,

OK:: The No. 1 air conditioning radiator damper servo sub-assembly is installed correctly.

Result:

Proceed to
OK
NG

3.CHECK NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MOTOR, LINK, DAMPER)

INSTALL NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

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3.CHECK NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MOTOR, LINK, DAMPER)

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

4.PERFORM ACTIVE TEST USING GTS

REMOVE PINCHED WIRE HARNESS

4.PERFORM ACTIVE TEST USING GTS

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 Right Air Mix Damper Control Servo Motor	No. 1 air conditioning radiator damper servo sub-assembly operation	128 to 384	Operates between 255 to 347 pulses

Body Electrical > Air Conditioner > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Front Right Air Mix Damper Control Servo Motor Actual Pulse	No. 1 air conditioning radiator damper servo sub-assembly actual pulse	Min.: 128 Max.: 384	· MAX COLD: 255 (pulse) · MAX HOT: 347 (pulse)	-

Body Electrical > Air Conditioner > Active Test

Active Test Display
Front Right Air Mix Damper Control Servo Motor

Data List Display
Front Right Air Mix Damper Control Servo Motor Actual Pulse

50004 450 28 205

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

Result:

Proceed to
OK
NG

5.PERFORM ACTIVE TEST USING GTS

8.PERFORM ACTIVE TEST USING GTS

5.PERFORM ACTIVE TEST USING GTS

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 Right Air Mix Damper Control Servo Motor	No. 1 air conditioning radiator damper servo sub-assembly operation	Min: 128 128 to 384	Operates between 255 to 347 pulses

Body Electrical > Air Conditioner > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Front Right Air Mix Damper Control Servo Motor Target Pulse	No. 1 air conditioning radiator damper servo sub-assembly target pulse	Min: 128 Max: 384	· MAX COLD: 255 (pulse) · MAX HOT: 347 (pulse)	-
Front Right Air Mix Damper Control Servo Motor Actual Pulse	No. 1 air conditioning radiator damper servo sub-assembly actual pulse	Min: 128 Max: 384	· MAX COLD: 255 (pulse) · MAX HOT: 347 (pulse)	-

Body Electrical > Air Conditioner > Active Test

Active Test Display
Front Right Air Mix Damper Control Servo Motor

Data List Display
Front Right Air Mix Damper Control Servo Motor Target Pulse
Front Right Air Mix Damper Control Servo Motor Actual Pulse

50004 450 28 204,205

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

Result:

Proceed to
OK
NG

USE SIMULATION METHOD TO CHECK

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6.REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

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Result:

Proceed to
NEXT

7.PERFORM ACTIVE TEST USING GTS

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 Right Air Mix Damper Control Servo Motor	No. 1 air conditioning radiator damper servo sub-assembly operation	128 to 384	Operates between 255 to 347 pulses

Body Electrical > Air Conditioner > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Front Right Air Mix Damper Control Servo Motor Actual Pulse	No. 1 air conditioning radiator damper servo sub-assembly actual pulse	Min.: 128 Max.: 384	· MAX COLD: 255 (pulse) · MAX HOT: 347 (pulse)	-

Body Electrical > Air Conditioner > Active Test

Active Test Display
Front Right Air Mix Damper Control Servo Motor

Data List Display
Front Right Air Mix Damper Control Servo Motor Actual Pulse

50004 450 28 205

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

Result:

Proceed to
OK
NG

END

REPLACE AIR CONDITIONING HARNESS ASSEMBLY

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8.PERFORM ACTIVE TEST USING GTS

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	128 to 384	Operates between 235 to 258 pulses

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 target pulse	Min.: 128 Max.: 384	· Recirculation: 258 (pulse) · Fresh: 235 (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

6.REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

9.CHECK AIR CONDITIONING RADIATOR ASSEMBLY (DAMPER)

Pre-procedure1

Remove the No. 1 air conditioning radiator damper servo sub-assembly.

HINT:: for M20C-FKS:Vehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for M20C-FKS)>DISASSEMBLY202004,999999,_58,_083104,_0417475,RM100000001MEMN,

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Operate the dampers by hand.

OK:: The dampers are easily operated by hand.

Result:

Proceed to
OK
NG

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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REPLACE AIR CONDITIONING RADIATOR ASSEMBLY

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