Cooling is Poor [11/2023 - ]: Procedure

1. Confirm that ECO HEAT/COOL switch (radio and display receiver assembly) is set to off.
2. Confirm that ECO drive mode is set to off.

   HINT: 

   When the ECO drive mode is set to ON, the air conditioning amplifier assembly performs minimal air conditioning control in order to promote the improvement of fuel economy. Ensure that the customer understands that the airflow volume will be decreased compared to normal operation.

   Control	Control Summary
   Air Volume Control	Sets the blower level to less.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

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

   Item	Condition
   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  3

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
   Front Left Air Mix Damper Control Servo Motor	This test activates the Front Left Air Mix Damper Control Servo Motor. (No. 1 air conditioning radiator damper servo sub-assembly (front left side air mix))	128: Min 384: Max	Operate with ignition switch ON.
   Front Right Air Mix Damper Control Servo Motor	This test activates the Front Right Air Mix Damper Control Servo Motor. (No. 1 air conditioning radiator damper servo sub-assembly (front right side air mix))	128: Min 384: Max	Operate with ignition switch ON.
   Rear Air Mix Damper Control Servo Motor	This test activates the rear air mix damper control servo motor. (Rear air mix damper servo sub-assembly)	128: Min 384: Max	Operate with ignition switch ON.

   Body Electrical > Air Conditioner > Active Test 

   Active Test Display
   Front Left Air Mix Damper Control Servo Motor

   Data List Display
   Front Left Air Mix Damper Control Servo Motor Actual Pulse

   Body Electrical > Air Conditioner > Active Test 

   Active Test Display
   Front Right Air Mix Damper Control Servo Motor

   Data List Display
   Front Right Air Mix Damper Control Servo Motor Actual Pulse

   Body Electrical > Air Conditioner > Active Test 

   Active Test Display
   Rear Air Mix Damper Control Servo Motor

   Data List Display
   Rear Air Mix Damper Control Servo Motor Actual Pulse

   OK

   Damper servo motor is operated.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO DIAGNOSTIC TROUBLE CODE CHART (FOR SERVO MOTOR OF APPLICABLE ABNORMAL OPERATION). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ] 

Result: 

OK 

See step  4

1. Disconnect the G5 solar sensor (automatic light control sensor) connector.
2. Disconnect the H135 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
   G5-1 (CLTB) - H135-8 (CLTB)	Always	Below 1 Ω
   G5-2 (CLTE) - H135-21 (CLTE)	Always	Below 1 Ω
   G5-4 (CLTS) - H135-20 (CLTS)	Always	Below 1 Ω
   G5-1 (CLTB) or H135-8 (CLTB) - Other terminals and body ground	Always	10 kΩ or higher
   G5-2 (CLTE) or H135-21 (CLTE) - Other terminals and body ground	Always	10 kΩ or higher
   G5-4 (CLTS) or H135-20 (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  5

Refer to ON-VEHICLE INSPECTION [12/2019 - ]

Result

Result: 

OK 

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

Result: 

NG 

REPLACE SOLAR SENSOR (AUTOMATIC LIGHT CONTROL SENSOR). Refer to  REMOVAL [12/2019 - ]