RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0591215 AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type) C

HEATING / AIR CONDITIONING  AIR CONDITIONING SYSTEM(for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type)  B1449  Air Outlet Damper Control Servo Motor Circuit (Rear)  


DESCRIPTION

The No. 2 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
B1449 Air Outlet Damper Control Servo Motor Circuit (Rear) Air outlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 2 air conditioning radiator damper servo sub-assembly
·

No. 2 air conditioning radiator damper servo sub-assembly

·

Air conditioning harness assembly

·

Air conditioning amplifier assembly

·

Air conditioning radiator assembly


Memorized
(30 sec. or more)*

*: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.


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

E389770E02
0.115,2.563 2.552,3.01 2.438,0.448 10 false No. 2 Air Conditioning Radiator Damper Servo Sub-assembly 5.469,2.552 7.052,2.917 1.583,0.365 10 false Air Conditioning Amplifier Assembly 2.792,2.573 5.052,2.813 2.26,0.24 10 false Air Conditioning Harness Assembly 0.781,3.313 3.042,3.552 2.26,0.24 10 false : LIN Communication Line 2.729,1.302 2.969,1.479 0.24,0.177 10 false IC 6.76,1.323 7,1.5 0.24,0.177 10 false IC 6.625,0.448 6.865,0.625 0.24,0.177 10 false +B

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 Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type)>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 Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type)>INITIALIZATION



PROCEDURE

1.CHECK FOR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.


e.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 121

Result:
Result Proceed to
B1497 is not output A
B1497 is output B



A

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

B

GO TO DTC B1497

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING SYSTEM (for Gasoline Model (NR Series) with Manual Air Conditioning System for Electrical Control Type)>B1497


2.INSPECT NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (INSTALLATION CONDITION)
a.

Check that the No. 2 air conditioning radiator damper servo sub-assembly is installed correctly.

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>REASSEMBLY

OK:

The No. 2 air conditioning radiator damper servo sub-assembly is installed correctly.



Result:
Proceed to
OK
NG



OK

3.INSPECT NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (MOTOR, LINK, DAMPER)

NG

INSTALL NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY CORRECTLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>REASSEMBLY


3.INSPECT NO. 2 AIR CONDITIONING RADIATOR 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.INSPECT AIR CONDITIONING RADIATOR ASSEMBLY (DAMPER)

NG

REMOVE PINCHED WIRE HARNESS

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

Remove the No. 2 air conditioning radiator damper servo sub-assembly.

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


b.

Operate the dampers by hand.

OK:

The dampers are easily operated by hand.



Result:
Proceed to
OK
NG



OK

5.READ VALUE USING GTS

NG

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY

Click hereVehicle Interior>HEATING / AIR CONDITIONING>AIR CONDITIONING UNIT (for Gasoline Model)>REMOVAL


5.READ VALUE USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Operate the mode switch.


e.

Enter the following menus: Body Electrical / Air Conditioner / Data List.


f.

Read the Data List according to the display on the GTS.

Body Electrical > Air Conditioner > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Air Outlet Servo Pulse (R) No. 2 air conditioning radiator damper servo sub-assembly target pulse Min.: 128
Max.: 383
·

FACE: 250 (pulse)

·

B/L: 281 (pulse)

·

FOOT: 287 (pulse)

·

F/D: 297 (pulse)

·

SHUT: 250 (pulse)

·

D/F: 272 (pulse)


No. 2 air conditioning radiator damper servo sub-assembly circuit malfunction
Air Outlet Servo Actual Pls(R) No. 2 air conditioning radiator damper servo sub-assembly actual pulse Min.: 128
Max.: 383
·

FACE: 250 (pulse)

·

B/L: 281 (pulse)

·

FOOT: 287 (pulse)

·

F/D: 297 (pulse)

·

SHUT: 250 (pulse)

·

D/F: 272 (pulse)


No. 2 air conditioning radiator damper servo sub-assembly circuit malfunction
Body Electrical > Air Conditioner > Data List
Tester Display
Air Outlet Servo Pulse (R)
Air Outlet Servo Actual Pls(R)
50003 121 76,151
OK:

When the mode switch is operated, the actual pulse changes following the target pulse.



Result:
Result Proceed to
Actual pulse changes following the target pulse A
Target pulse changes but actual pulse does not change B
Target pulse and actual pulse do not change C



A

6.CHECK FOR DTC

B

7.REPLACE NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

C

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


6.CHECK FOR DTC
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.


e.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 121

Result:
Result Proceed to
B1449 is not output A
B1449 is output B



A

USE SIMULATION METHOD TO CHECK

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


B

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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


7.REPLACE NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY
a.

Replace the No. 2 air conditioning radiator damper servo sub-assembly.

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

HINT:

Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or known good one and check that the condition returns to normal.



b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON.


d.

Turn the GTS on.


e.

Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.


f.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 121

Result:
Result Proceed to
B1449 is not output A
B1449 is output B



A

END (NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY WAS DEFECTIVE)

B

8.REPLACE AIR CONDITIONING HARNESS ASSEMBLY
8.REPLACE AIR CONDITIONING HARNESS ASSEMBLY
a.

Replace the air conditioning harness assembly.

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

HINT:

Since the air conditioning harness assembly cannot be inspected while it is removed from the vehicle, replace the air conditioning harness assembly with a new or known good one and check that the condition returns to normal.



b.

Connect the GTS to the DLC3.


c.

Turn the ignition switch to ON.


d.

Turn the GTS on.


e.

Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.


f.

Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes
50001 121

Result:
Result Proceed to
B1449 is not output A
B1449 is output B



A

END (AIR CONDITIONING HARNESS ASSEMBLY WAS DEFECTIVE)

B

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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