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)  B1442  Air Inlet Damper Control Servo Motor  


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 to change the air inlet mode (fresh, recirculation/fresh, and recirculation).

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
B1442 Air Inlet Damper Control Servo Motor Air inlet damper position sensor value does not change even if air conditioning amplifier assembly operates No. 1 blower damper servo sub-assembly
·

No. 1 blower damper servo sub-assembly

·

No. 1 air conditioning radiator damper servo sub-assembly

·

Air conditioning harness assembly

·

Air conditioning amplifier assembly

·

Blower 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. 1 blower damper servo sub-assembly operating ○ ○
Malfunction Air inlet damper servo operation request signals are output but the air inlet damper position sensor value does not change ○ -
Air inlet damper servo operation request signals are output but the air inlet 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

E419680E02
5.49,6.104 7.063,6.469 1.573,0.365 10 false Air Conditioning Amplifier Assembly 3.375,6.094 4.917,6.479 1.542,0.385 10 false Air Conditioning Harness Assembly 0.417,6.104 3.073,6.302 2.656,0.198 10 false No. 1 Blower Damper Servo Sub-assembly 0.438,4.229 2.854,4.563 2.417,0.333 10 false No. 1 Air Conditioning Radiator Damper Servo Sub-assembly 0.573,1.563 1.146,1.771 0.573,0.208 10 false Air Mix 0.635,3.469 1.208,3.677 0.573,0.208 10 false Mode 2.188,1.802 2.573,2.01 0.385,0.208 10 false IC 0.771,6.427 2.469,6.646 1.698,0.219 10 false : LIN Communication Line 6.76,1.396 6.979,1.604 0.219,0.208 10 false IC 6.625,0.25 6.906,0.479 0.281,0.229 10 false +B 2.594,3.719 2.979,3.927 0.385,0.208 10 false GND 2.656,3.302 3.042,3.51 0.385,0.208 10 false M+ 2.667,3.104 3.052,3.313 0.385,0.208 10 false M- 2.583,2.906 2.969,3.115 0.385,0.208 10 false STE1 2.583,2.708 2.969,2.917 0.385,0.208 10 false STE2 3.021,2.635 3.406,2.844 0.385,0.208 10 false 6 3.021,2.833 3.406,3.042 0.385,0.208 10 false 5 3.021,3.031 3.406,3.24 0.385,0.208 10 false 8 3.021,3.635 3.406,3.844 0.385,0.208 10 false 4 3.021,3.229 3.406,3.438 0.385,0.208 10 false 7 0.125,4.219 0.51,4.427 0.385,0.208 10 false A 0.104,6.104 0.49,6.313 0.385,0.208 10 false B 3.021,4.896 3.406,5.104 0.385,0.208 10 false 1 3.021,5.094 3.406,5.302 0.385,0.208 10 false 4 3.021,5.292 3.406,5.5 0.385,0.208 10 false 5 3.021,5.49 3.406,5.698 0.385,0.208 10 false 2 3.021,5.688 3.406,5.896 0.385,0.208 10 false 3 2.615,4.896 3,5.104 0.385,0.208 10 false GND 2.719,5.094 3.104,5.302 0.385,0.208 10 false M+ 2.75,5.292 3.135,5.5 0.385,0.208 10 false M- 2.646,5.49 3.031,5.698 0.385,0.208 10 false sigA 2.646,5.688 3.031,5.896 0.385,0.208 10 false sigB

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 output A
B1441, B1442 and B1443 are output B
Only B1442 is output C



A

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


B

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

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


C

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

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

OK:

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



Result:
Proceed to
OK
NG



OK

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

NG

INSTALL NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY CORRECTLY

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


3.INSPECT 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.INSPECT NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY (DAMPER)

NG

REMOVE PINCHED WIRE HARNESS

4.INSPECT NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY (DAMPER)
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

5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY

NG

REPLACE BLOWER ASSEMBLY

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


5.INSPECT AIR CONDITIONING HARNESS ASSEMBLY
a.

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


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A-6 (STE2) - B-3 (sigB) Always Below 1 Ω
A-5 (STE1) - B-2 (sigA) Always Below 1 Ω
A-8 (M-) - B-5 (M-) Always Below 1 Ω
A-7 (M+) - B-4 (M+) Always Below 1 Ω
A-4 (GND) - B-1 (GND) Always Below 1 Ω
A-6 (STE2) or B-3 (sigB) - Other terminals and Body ground Always 10 kΩ or higher
A-5 (STE1) or B-2 (sigA) - Other terminals and Body ground Always 10 kΩ or higher
A-8 (M-) or B-5 (M-) - Other terminals and Body ground Always 10 kΩ or higher
A-7 (M+) or B-4 (M+) - 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 (for Gasoline Model)>DISASSEMBLY