Recirculated/Fresh Air Modes do not Switch [12/2023 - ]: Procedure

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

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REINSTALL NO. 1 BLOWER DAMPER SERVO SUB-ASSEMBLY. Refer to  REASSEMBLY [09/2023 - ] 

Result: 

OK 

See step  2

1. Check for DTCs.

   Body Electrical > Air Conditioner > Trouble Codes 

   Result

   Result	Proceed to
   B143A-87 and B143B-7F are not output	A
   B143A-87 is output	B
   B143B-7F is output	C

Result: 

B 

GO TO DTC B143A-87. Refer to  DTC B143A-87: Lost Communication with Air Inlet Damper Control Servo Motor LIN Missing Message [12/2023 - ] 

Result: 

C 

GO TO DTC B143B-7F. Refer to  DTC B143B-7F: Air Inlet Damper Control Servo Motor Actuator Stuck Off [12/2023 - ] 

Result: 

A 

See step  3

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

   Powertrain > Engine > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Coolant Temperature	Engine coolant temperature	Min.: -40°C (-40°F) Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	This is the engine coolant temperature. HINT:  After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal. If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted. Check if the engine overheats if the value indicated is higher than 135°C (275°F).

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

   OK

   The value of the display does not change frequently.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIR CONDITIONER UNIT ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

Result: 

NG 

GO TO COOLING SYSTEM. Refer to  ON-VEHICLE INSPECTION [12/2023 - ]