DTC B1442: Air Inlet Damper Control Servo Motor Circuit [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 recirculation/fresh 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 Inlet Damper Targ Pulse	Blower damper servo sub-assembly (air inlet) target pulse	Min.: 128 Max.: 383	Recirculation: 7 (pulse) Fresh: 28 (pulse)	-
   Air Inlet Damper Actual Pulse	Blower damper servo sub-assembly (air inlet) actual pulse	Min.: 128 Max.: 383	Recirculation: 7 (pulse) Fresh: 28 (pulse)	-

   Body Electrical > Air Conditioner > Data List 

   Tester Display
   Air Inlet Damper Targ Pulse
   Air Inlet Damper Actual Pulse

   OK

   When the recirculation/fresh 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:  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 blower damper servo sub-assembly (air inlet).

   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 B1442 is output	A
   DTC B1442 is not output	B

Result:  2

B 

END (BLOWER DAMPER SERVO SUB-ASSEMBLY (AIR INLET) 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 B1442 is output	A
   DTC B1442 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 B1442 is output	A
   DTC B1442 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 - ]