DTC B1455/55: Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit [03/2019 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Operate the mode switch.
5. Enter the following menus: Body Electrical / Air Conditioner / Data List.
6. Read the Data List according to the display on the Techstream.

   Body Electrical > Air Conditioner > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   A/O Damper DEF Pos(D Side)	No. 1 air conditioning radiator damper servo sub-assembly target pulse	Min.: 128 Max.: 383	FACE1: 164 (pulse) FACE2: 164 (pulse) FACE: 164 (pulse) B/L (manual mode): 164 (pulse) B/L (automatic mode): 164 to 180 (pulse) B/L2: 164 (pulse) FOOT-D: 230 (pulse) FOOT-R: 176 (pulse) FOOT (manual mode): 176 (pulse) FOOT (automatic mode): 176 to 186 (pulse) FOOT/DEF: 270 (pulse) DEF: 270 (pulse)	-
   A/O Damper DEF Actual Pos(D)	No. 1 air conditioning radiator damper servo sub-assembly actual pulse	Min.: 128 Max.: 383	FACE1: 164 (pulse) FACE2: 164 (pulse) FACE: 164 (pulse) B/L (manual mode): 164 (pulse) B/L (automatic mode): 164 to 180 (pulse) B/L2: 164 (pulse) FOOT-D: 230 (pulse) FOOT-R: 176 (pulse) FOOT (manual mode): 176 (pulse) FOOT (automatic mode): 176 to 186 (pulse) FOOT/DEF: 270 (pulse) DEF: 270 (pulse)	-

   Body Electrical > Air Conditioner > Data List 

   Tester Display
   A/O Damper DEF Pos(D Side)
   A/O Damper DEF Actual Pos(D)

   OK

   When the mode switch is operated, 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: 

B 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

C 

See step  4

Result: 

D 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2017 - ] 

Result: 

A 

See step  2

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

   Refer to DISASSEMBLY [09/2014 - 09/2020] , or refer to DISASSEMBLY [09/2020 - ]

   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 [09/2014 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1455/55 is output	A
   DTC B1455/55 is not output	B

Result: 

B 

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

Result: 

A 

See step  3

1. Replace the air conditioning harness assembly.

   Refer to DISASSEMBLY [09/2014 - 09/2020] , or refer to DISASSEMBLY [09/2020 - ]

   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 [09/2014 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1455/55 is output	A
   DTC B1455/55 is not output	B

Result: 

A 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

B 

END (AIR CONDITIONING HARNESS ASSEMBLY WAS DEFECTIVE) 

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - ]

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   DTC B1455/55 is output	A
   DTC B1455/55 is not output	B

Result: 

A 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 09/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2020 - 01/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2023 - ]