Air Vent Temperature does not Change and Right Vent is Different from Left and Vice Versa (Same Left/Right Temperature Setting) [04/2018 -]: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK WHEN MALFUNCTION OCCURS

Result

Result	Proceed to
When using cooling function	A
When using heater function	B

Result:

See step 6

Result:

See step 2

PERFORM REFRIGERANT SHORTAGE CHECK

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.

Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.

Body Electrical > Air Conditioner > Utility

Tester Display
Refrigerant Gas Volume Check

Check that the following conditions are met and perform the refrigerant shortage check according to the display on the Techstream.

MEASUREMENT CONDITION:

Item	Condition
A/C switch	On
Ambient temperature*	0 to 49°C (32 to 120°F)
Blower speed	HI

*: If the ambient temperature is not within the range shown, do not perform this check.

Result

Result	Amount of Refrigerant
Refrigerant correct	Correct
Refrigerant shortage	Insufficient

"Refrigerant correct" is displayed on the Techstream.

Result

Proceed to
OK
NG

Result:

CHARGE SYSTEM WITH REFRIGERANT. Refer to REPLACEMENT [04/2018 -]

Result:

See step 3

PERFORM ACTIVE TEST USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Air Conditioner / Active Test.

Perform the Active Test according to the display on the Techstream.

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 and 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 and 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)

Each damper servo motor operates.

Result

Proceed to
OK
NG

Result:

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to DIAGNOSTIC TROUBLE CODE CHART [04/2018 - 08/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2020 -]

Result:

See step 4

CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Disconnect the G23 automatic light control sensor connector.
Disconnect the G33 main body ECU (multiplex network body ECU) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
G23-1 (CLTB) - G33-23 (CLTB)	Always	Below 1 Ω
G23-2 (CLTE) - G33-25 (CLTE)	Always	Below 1 Ω
G23-4 (CLTS) - G33-24 (CLTS)	Always	Below 1 Ω
G23-1 (CLTB) or G33-23 (CLTB) - Other terminals and body ground	Always	10 kΩ or higher
G23-2 (CLTE) or G33-25 (CLTE) - Other terminals and body ground	Always	10 kΩ or higher
G23-4 (CLTS) or G33-24 (CLTS) - Other terminals and body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 5

INSPECT AUTOMATIC LIGHT CONTROL SENSOR

Remove the automatic light control sensor.
Refer to REMOVAL [04/2018 -]

Inspect the automatic light control sensor.

Refer to ON-VEHICLE INSPECTION [04/2018 -]

Result

Proceed to
OK
NG

Result:

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET. Refer to ON-VEHICLE INSPECTION [04/2018 -]

Result:

REPLACE AUTOMATIC LIGHT CONTROL SENSOR. Refer to REMOVAL [04/2018 -]

BLEED AIR FROM COOLING SYSTEM

Bleed air from cooling system.

Refer to REPLACEMENT [04/2018 -]

Result

Proceed to
NEXT

Result:

See step 7

CHECK OPERATION (AIR CONDITIONING SYSTEM)

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.

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

Result

Proceed to
OK
NG

Result:

END (MALFUNCTION DUE TO AIR IN COOLING SYSTEM)

Result:

See step 8

PERFORM ACTIVE TEST USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Air Conditioner / Active Test.

Perform the Active Test according to the display on the Techstream.

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 and 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 and 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)

Each damper servo motor operates.

Result

Proceed to
OK
NG

Result:

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY. Refer to DISASSEMBLY [04/2018 - 08/2019] , or refer to DISASSEMBLY [08/2019 -]

Result:

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to DIAGNOSTIC TROUBLE CODE CHART [04/2018 - 08/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2020 -]