Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [12/2019 - 11/2023]: Procedure

Result

Result: 

B 

See step  5

Result: 

A 

See step  2

1. Check for DTCs.

   Body Electrical > Main Body > Trouble Codes 

   Result

   Result	Proceed to
   B1244 is not output	A
   B1244 is output	B

Result: 

B 

GO TO DTC B1244 

w/ AFS: Refer to DTC B1244: Light Sensor Circuit [12/2019 - 11/2023]

w/o AFS: Refer to DTC B1244: Light Sensor Circuit [12/2019 - 11/2023]

Result: 

A 

See step  3

1. Prepare the vehicle according to the table below.
   MEASUREMENT CONDITION:
   
   

   Item	Condition
   Vehicle Condition	Engine running
   A/C Switch	On
   Ambient Temperature*1	0 to 49°C (32 to 120°F)
   Air Conditioning Air Inlet Temperature*2	25 to 35°C (77 to 95°F)
   Set Temperature	MAX COLD
   Recirculation/fresh Control Switch	Recirculation
   Air Vent Damper Position	FACE
   Blower Speed	HI

   HINT: 

   *1: This inspection can be judged correctly only if the ambient temperature is within a range of 0 to 49°C (32 to 120°F). Therefore, postpone the test if the temperature is low.

   *2: This inspection can be judged correctly only if the air inlet temperature is within a range of 25 to 35°C (77 to 95°F). Therefore, postpone the test if the temperature is out of range.

2. Using the GTS, check the amount of refrigerant.

   Body Electrical > Air Conditioner > Utility 

   Tester Display
   Refrigerant Gas Volume Check

   NOTE:

   If the conditions for the inspection are not met, "Refrigerant incorrect" will be displayed on the GTS. Confirm the conditions of the inspection and perform the check again.

   HINT: 

   • If the amount of refrigerant is insufficient, "Refrigerant shortage" is displayed on the GTS and the indicator light on the A/C switch turns off.
   • When performing this inspection, a DTC will not be output even if "Refrigerant shortage" is displayed on the GTS.

   Result

   Result	Amount of Refrigerant
   Refrigerant shortage	Insufficient or leakage
   Refrigerant correct	Correct
   Refrigerant incorrect	Incorrect

   OK

   "Refrigerant correct" is displayed on the GTS.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CHARGE SYSTEM WITH REFRIGERANT. Refer to  REPLACEMENT [12/2019 - ] 

Result: 

OK 

See step  4

1. Perform the Active Test according to the display on the GTS.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Air Mix Servo Targ Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) pulse	Min.: 128 Max.: 383	Operates between 165 to 257 pulses
   Air Mix Servo Targ Pulse(P)	No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) pulse	Min.: 128 Max.: 383	Operates between 255 to 347 pulses

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Air Mix Servo Targ Pulse(D)

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Air Mix Servo Targ Pulse(P)

   OK

   Damper servo motor is operated.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to  ON-VEHICLE INSPECTION [12/2019 - ] 

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART (FOR SERVO MOTOR OF APPLICABLE ABNORMAL OPERATION). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 11/2023] 

Refer to REPLACEMENT [12/2019 - 10/2022] , or refer to REPLACEMENT [10/2022 - ]

Result

Result: 

NEXT 

See step  6

1. Set the same temperature for the left and right sides and check that the air that blows from the left and right front registers is the same temperature.

   OK

   The air from the left and right front registers is the same temperature.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (FAILURE DUE TO AIR ENTERING COOLANT) 

Result: 

NG 

See step  7

1. Perform the Active Test according to the display on the GTS.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Air Mix Servo Targ Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) pulse	Min.: 128 Max.: 383	Operates between 165 to 257 pulses
   Air Mix Servo Targ Pulse(P)	No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) pulse	Min.: 128 Max.: 383	Operates between 255 to 347 pulses

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Air Mix Servo Targ Pulse(D)

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Air Mix Servo Targ Pulse(P)

   OK

   Damper servo motor is operated.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY. Refer to  DISASSEMBLY [12/2019 - 10/2022]  , or refer to  DISASSEMBLY [10/2022 - 11/2023] 

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART (FOR SERVO MOTOR OF APPLICABLE ABNORMAL OPERATION). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 11/2023]