Cooling is Poor [04/2018 -]: Procedure

1. Check if the ECO mode indicator is off.

   OK

   The ECO mode indicator is off.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

See step  3

Result: 

NG 

See step  2

1. Operate the ECO switch assembly (electric parking brake switch assembly) and check that the ECO mode indicator turns off and the blower speed reduction is canceled.

   HINT: 

   • When ECO mode control is operating, the air conditioning amplifier assembly controls the air conditioning system to enhance fuel efficiency. Therefore, explain to the customer that, when ECO mode control is operating, the blower speed will be reduced.

     Control	Outline
     Blower Control	When the air conditioning system is in AUTO mode, the blower speed will be reduced to a certain speed. Additionally, if warm-up control is operating, the blower speed will be further reduced.
     Air Inlet Control	If the ambient temperature is a certain value or more, the air inlet mode will be changed to recirculation mode.

   • In some situations, ECO mode control may not operate even though it is enabled.

   Result

   Result	Proceed to
   ECO mode indicator turns off and blower speed reduction is canceled	A
   ECO mode indicator turns off, but the blower speed reduction is not canceled	B
   ECO mode indicator does not turn off

Result: 

B 

GO TO ECO Switch Circuit. Refer to  ECO Switch Circuit [04/2018 -]  

Result: 

A 

See step  3

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR REFRIGERANT LEAK. Refer to  REPLACEMENT [04/2018 -] 

Result: 

OK 

See step  4

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

   OK

   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 [04/2018 - 08/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 -] 

Result: 

OK 

See step  5

1. Disconnect the G23 automatic light control sensor connector.
2. Disconnect the G33 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
   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: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Remove the automatic light control sensor.

   Refer to REMOVAL [04/2018 -]

2. Inspect the automatic light control sensor.

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

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

Result: 

NG 

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