DTC B1441: Air Mix Damper Control Servo Motor Circuit (Passenger Side) [12/2013 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Operate the temperature adjustment switch.
5. Enter the following menus: Body Electrical / Air Conditioner / Data List.
6. Check the value(s) by referring to the table below.

   Body Electrical > Air Conditioner > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Air Mix Servo Targ Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly (air mix) target pulse	Min.: 128 Max.: 383	MAX COLD: 105 (pulse) MAX HOT: 7 (pulse)	-
   Air Mix Servo Actual Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly (air mix) actual pulse	Min.: 128 Max.: 383	MAX COLD: 105 (pulse) MAX HOT: 7 (pulse)	-

   Body Electrical > Air Conditioner > Data List 

   Tester Display
   Air Mix Servo Targ Pulse(D)
   Air Mix Servo Actual Pulse(D)

   OK

   When the temperature adjustment switch is turned from MAX COLD to MAX HOT, the actual pulse changes following the target pulse.

   Result

   Result	Proceed to
   Target pulse changes but actual pulse does not change	A
   Target pulse and actual pulse do not change	B
   Actual pulse changes following the target pulse (When troubleshooting according to the DTC)	C
   Actual pulse changes following the target pulse (When troubleshooting according to Problem Symptoms Table)	D

Result:  2

B 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result:  3

C 

See step  4

Result:  4

D 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2013 - 11/2016]  Refer to  PROBLEM SYMPTOMS TABLE [11/2016 - ] 

Result:  1

A 

See step  2

1. Replace the No. 1 air conditioning radiator damper servo sub-assembly (air mix).

   Refer to DISASSEMBLY [12/2013 - ]

   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.

2. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1441 is output	A
   DTC B1441 is not output	B

Result:  2

B 

END (NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY (AIR MIX) WAS DEFECTIVE) 

Result:  1

A 

See step  3

1. Replace the air conditioning harness assembly.

   Refer to DISASSEMBLY [12/2013 - ]

   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.

2. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1441 is output	A
   DTC B1441 is not output	B

Result:  1

A 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result:  2

B 

END (AIR CONDITIONING HARNESS ASSEMBLY WAS DEFECTIVE) 

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1441 is output	A
   DTC B1441 is not output	B

Result:  1

A 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result:  2

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 11/2016]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ]