Cooling System [06/2017 - 10/2020]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Utility / Refrigerant Gas Volume Check.

   Body Electrical > Air Conditioner > Utility 

   Tester Display
   Refrigerant Gas Volume Check

5. 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

   OK

   "Refrigerant correct" is displayed on Techstream.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR REFRIGERANT LEAK 

for HFC-134a (R134a): Refer to REPLACEMENT [06/2017 - 10/2020]

for HFO-1234yf (R1234yf): Refer to REPLACEMENT [03/2017 - ]

Result: 

OK 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
5. 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
   Blower Motor	Blower motor with fan sub-assembly	Min.: 0 Max.: 31	-
   Air Mix Servo Targ Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix*1 or air mix*2) 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*1	Min.: 128 Max.: 383	Operates between 255 to 347 pulses
   Air Outlet Servo Pulse (D)	No. 1 air conditioning radiator damper servo sub-assembly (mode) pulse	Min.: 128 Max.: 383	Operates between 241 to 348 pulses
   Air Inlet Damper Targ Pulse	No. 1 blower damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 220 to 256 pulses
   A/O Servo Pulse (Rr D)	No. 2 air conditioning radiator damper servo sub-assembly pulse*1	Min.: 128 Max.: 383	Operates between 158 to 260 pulses

   1. *1: for Dual Type
   2. *2: for Single Type

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Blower Motor

   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)

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Air Outlet Servo Pulse (D)

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   Air Inlet Damper Targ Pulse

   Body Electrical > Air Conditioner > Active Test 

   Tester Display
   A/O Servo Pulse (Rr D)

   OK

   The blower motor with fan sub-assembly and each damper servo motor operates.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO DTC TROUBLESHOOTING PROCEDURE FOR MALFUNCTIONING DAMPER SERVO MOTOR. Refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2017 - 08/2018]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2018 - 10/2020] 

Result: 

OK 

See step  3

1. Disconnect the M1 automatic light control sensor connector.
2. Disconnect the K52 main body ECU (multiplex network body ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M1-1 (CLTB) - K52-23 (CLTB)	Always	Below 1 Ω
   M1-2 (CLTE) - K52-25 (CLTE)	Always	Below 1 Ω
   M1-4 (CLTS) - K52-24 (CLTS)	Always	Below 1 Ω
   M1-1 (CLTB) or K52-23 (CLTB) - Other terminals and body ground	Always	10 kΩ or higher
   M1-2 (CLTE) or K52-25 (CLTE) - Other terminals and body ground	Always	10 kΩ or higher
   M1-4 (CLTS) or K52-24 (CLTS) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the automatic light control sensor.

   Refer to REMOVAL [06/2017 - 10/2020]

2. Inspect the automatic light control sensor.

   Refer to ON-VEHICLE INSPECTION [03/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET 

for HFC-134a (R134a): Refer to ON-VEHICLE INSPECTION [06/2017 - 10/2020]

for HFO-1234yf (R1234yf): Refer to ON-VEHICLE INSPECTION [03/2017 - ]

Result: 

NG 

REPLACE AUTOMATIC LIGHT CONTROL SENSOR. Refer to  REMOVAL [06/2017 - 10/2020]