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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System (Except HV, W/ Auto A/C) - Diagnostics - Introduction >> AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System) >> Data List / Active Test [12/2019 - 10/2022] >> Data List / Active Test [12/2019 - 10/2022]

Data List / Active Test [12/2019 - 10/2022]

  1. DATA LIST 
    NOTE:

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

    HINT: 

    Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    1. Air Conditioner

      Body Electrical > Air Conditioner > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Room Temperature Sensor Room temp. sensor (cooler thermistor) Min.: -6.50°C (20.30°F)
      Max.: 57.25°C (135.05°F)      		 Actual cabin temperature displayed Room temp. sensor (cooler thermistor) circuit malfunction
      • When open circuit: -6.50°C (20.30°F)
      • When short circuit: 57.25°C (135.05°F)
      Ambient Temp Sensor Ambient temp. sensor (thermistor assembly) Min.: -23.30°C (-9.94°F)
      Max.: 65.95°C (150.71°F)      		 Actual ambient temperature displayed Ambient temp. sensor (thermistor assembly) circuit malfunction
      • When open circuit: -23.30°C (-9.94°F)
      • When short circuit: 65.95°C (150.71°F)
      Adjusted Ambient Temp Adjusted ambient temperature Min.: -30.80°C (-23.44°F)
      Max.: 50.80°C (123.44°F)      		 Adjust ambient temperature displayed Air conditioning amplifier assembly circuit malfunction
      Evaporator Fin Thermistor Evaporator temp. sensor (No. 1 cooler thermistor) Min.: -29.70°C (-21.46°F)
      Max.: 59.55°C (139.19°F)      		 Actual evaporator temperature displayed Evaporator temp. sensor (No. 1 cooler thermistor) circuit malfunction
      • When open circuit: -29.70°C (-21.46°F)
      • When short circuit: 59.55°C (139.19°F)
      Evaporator Target Temp Evaporator target temperature Min.: -327.68°C (-557.82°F)
      Max.: 327.67°C (621.81°F)      		 Evaporator target temperature displayed Evaporator temp. sensor (No. 1 cooler thermistor) circuit malfunction
      • When open circuit: -327.68°C (-557.82°F)
      • When short circuit: 327.67°C (621.81°F)
      Solar Sensor (D Side) Driver side automatic light control sensor Min.: 0
      Max.: 255      		 Driver side automatic light control sensor value increases as brightness increases Driver side automatic light control sensor circuit malfunction
      • When open circuit: 0
      • When short circuit: 255
      Solar Sensor (P Side) Front passenger side automatic light control sensor Min.: 0
      Max.: 255      		 Front passenger side automatic light control sensor value increases as brightness increases Front passenger side automatic light control sensor circuit malfunction
      • When open circuit: 0
      • When short circuit: 255
      Engine Coolant Temp Engine coolant temperature sensor Min.: 1.30°C (34.34°F)
      Max.: 90.55°C (194.99°F)      		 Actual engine coolant temperature displayed
      • SFI system malfunction
      • CAN communication system malfunction
      Blower Motor Speed Level Blower motor speed level Min.: 0
      Max.: 31      		 Displayed speed level increases in range between 0 and 31 as blower motor speed increases Blower motor with fan sub-assembly circuit malfunction
      Regulator Pressure Sensor Air conditioner pressure sensor Min.: -456.68 kPaG (gauge)
      Max.: 3294.37 kPaG (gauge)      		 Actual refrigerant pressure displayed
      • Refrigerant line (gas leak etc.)
      • Air conditioner pressure sensor circuit malfunction
      Regulator Control Current Solenoid valve control current Min.: 0 A
      Max.: 0.997 A      		 Value changes between 0 A and 0.997 A in accordance with solenoid valve operation Cooler compressor assembly circuit malfunction
      Room Temp Sensor (Rear) No. 2 room temp. sensor (cooler thermistor) Min.: -6.50°C (20.30°F)
      Max.: 57.25°C (135.05°F)      		 Actual cabin (rear) temperature displayed No. 2 room temp. sensor (cooler thermistor) circuit malfunction
      • When open circuit: -6.50°C (20.30°F)
      • When short circuit: 57.25°C (135.05°F)
      Evap Temp Sensor (Rear) Rear evaporator temp. sensor (No. 2 air conditioning harness assembly) Min.: -29.70°C (-21.46°F)
      Max.: 59.55°C (139.19°F)      		 Actual evaporator (rear) temperature displayed Rear evaporator temp. sensor (No. 2 air conditioning harness assembly) circuit malfunction
      • When open circuit: -29.70°C (-21.46°F)
      • When short circuit: 59.55°C (139.19°F)
      Blower Motor Level (Rear) Rear blower motor control Min.: 0
      Max.: 31      		 Displayed speed level increases in range between 0 and 31 as blower motor (rear) speed increases Rear blower motor control circuit malfunction
      Air Outlet Servo Pulse (R) Rear mode damper servo sub-assembly target pulse Min.: 128
      Max.: 383
      • FACE: 276 (pulse)
      • B/L: 228 (pulse)
      • FOOT: 200 (pulse)
      		 Rear mode damper servo sub-assembly circuit malfunction
      Air Outlet Servo Actual Pls(R) Rear mode damper servo sub-assembly actual pulse Min.: 128
      Max.: 383
      • FACE: 276 (pulse)
      • B/L: 228 (pulse)
      • FOOT: 200 (pulse)
      		 Rear mode damper servo sub-assembly circuit malfunction
      Air Mix Servo Targ Pulse(R) Rear air mix damper servo sub-assembly target pulse Min.: 128
      Max.: 383
      • MAX COLD: 258 (pulse)
      • MAX HOT: 213 (pulse)
      		 Rear air mix damper servo sub-assembly circuit malfunction
      Air Mix Servo Actual Pulse(R) Rear air mix damper servo sub-assembly actual pulse Min.: 128
      Max.: 383
      • MAX COLD: 258 (pulse)
      • MAX HOT: 213 (pulse)
      		 Rear air mix damper servo sub-assembly circuit malfunction
      Air Mix Servo Targ Pulse(D) No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) target pulse Min.: 128
      Max.: 383
      • MAX COLD: 257 (pulse)
      • MAX HOT: 165 (pulse)
      		 No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) circuit malfunction
      Air Mix Servo Actual Pulse(D) No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) actual pulse Min.: 128
      Max.: 383
      • MAX COLD: 257 (pulse)
      • MAX HOT: 165 (pulse)
      		 No. 1 air conditioning radiator damper servo sub-assembly (driver side air mix) circuit malfunction
      Air Mix Servo Targ Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) target pulse Min.: 128
      Max.: 383
      • MAX COLD: 255 (pulse)
      • MAX HOT: 347 (pulse)
      		 No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) circuit malfunction
      Air Mix Servo Actual Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) actual pulse Min.: 128
      Max.: 383
      • MAX COLD: 255 (pulse)
      • MAX HOT: 347 (pulse)
      		 No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) circuit malfunction
      Air Outlet Servo Pulse (D) No. 2 air conditioning radiator damper servo sub-assembly (driver side mode) target pulse Min.: 128
      Max.: 383
      • FACE-R: 271 (pulse)
      • FACE: 256 (pulse)
      • FACE1: 256 (pulse)
      • FACE2: 256 (pulse)
      • B/L: 245 (pulse)
      • B/L2: 245 (pulse)
      • FOOT-R: 215 (pulse)
      • FOOT: 215 (pulse)
      • FOOT-D: 207 (pulse)
      • FOOT-0: 224 (pulse)
      • F/D: 192 (pulse)
      • DEF-FOOT: 173 (pulse)
      • DEF or FULL CLOSE: 164 (pulse)
      • HALF OPEN: 278 (pulse)
      		 No. 2 air conditioning radiator damper servo sub-assembly (driver side mode) circuit malfunction
      Air Outlet Servo Actu Pulse(D) No. 2 air conditioning radiator damper servo sub-assembly (driver side mode) actual pulse Min.: 128
      Max.: 383
      • FACE-R: 271 (pulse)
      • FACE: 256 (pulse)
      • FACE1: 256 (pulse)
      • FACE2: 256 (pulse)
      • B/L: 245 (pulse)
      • B/L2: 245 (pulse)
      • FOOT-R: 215 (pulse)
      • FOOT: 215 (pulse)
      • FOOT-D: 207 (pulse)
      • FOOT-0: 224 (pulse)
      • F/D: 192 (pulse)
      • DEF-FOOT: 173 (pulse)
      • DEF or FULL CLOSE: 164 (pulse)
      • HALF OPEN: 278 (pulse)
      		 No. 2 air conditioning radiator damper servo sub-assembly (driver side mode) circuit malfunction
      Air Outlet Servo Targ Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (front passenger side mode) target pulse Min.: 128
      Max.: 383
      • FACE-R: 241 (pulse)
      • FACE: 256 (pulse)
      • FACE1: 256 (pulse)
      • FACE2: 256 (pulse)
      • B/L: 267 (pulse)
      • B/L2: 267 (pulse)
      • FOOT-R: 297 (pulse)
      • FOOT: 297 (pulse)
      • FOOT-D: 305 (pulse)
      • FOOT-0: 288 (pulse)
      • F/D: 320 (pulse)
      • DEF-FOOT: 339 (pulse)
      • DEF or FULL CLOSE: 348 (pulse)
      • HALF OPEN: 234 (pulse)
      		 No. 1 air conditioning radiator damper servo sub-assembly (front passenger side mode) circuit malfunction
      Air Outlet Servo Actu Pulse(P) No. 1 air conditioning radiator damper servo sub-assembly (front passenger side mode) actual pulse Min.: 128
      Max.: 383
      • FACE-R: 241 (pulse)
      • FACE: 256 (pulse)
      • FACE1: 256 (pulse)
      • FACE2: 256 (pulse)
      • B/L: 267 (pulse)
      • B/L2: 267 (pulse)
      • FOOT-R: 297 (pulse)
      • FOOT: 297 (pulse)
      • FOOT-D: 305 (pulse)
      • FOOT-0: 288 (pulse)
      • F/D: 320 (pulse)
      • DEF-FOOT: 339 (pulse)
      • DEF or FULL CLOSE: 348 (pulse)
      • HALF OPEN: 234 (pulse)
      		 No. 1 air conditioning radiator damper servo sub-assembly (front passenger side mode) circuit malfunction
      Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly target pulse Min.: 128
      Max.: 383
      • Recirculation: 256 (pulse)
      • Fresh: 220 (pulse)
      		 No. 1 blower damper servo sub-assembly circuit malfunction
      Air Inlet Damper Actual Pulse No. 1 blower damper servo sub-assembly actual pulse Min.: 128
      Max.: 383
      • Recirculation: 256 (pulse)
      • Fresh: 220 (pulse)
      		 No. 1 blower damper servo sub-assembly circuit malfunction
      Electric Heater Count Maximum electric heater operation level Min.: 0
      Max.: 3      		 Maximum possible operation level of electric heater displayed PTC heater circuit malfunction (w/ Quick Heater)
      Electric Heater Active Level Actual electric heater operation level Min.: 0
      Max.: 3      		 Actual operation level of electric heater displayed PTC heater circuit malfunction (w/ Quick Heater)
      Shift Set Temperature Shift set temperature 2C decr / 1C decr / Normal / 1C incr / 2C incr Customized value displayed -
      Air Inlet Mode Air inlet mode Auto or Manual Customized value displayed -
      Compressor Mode Compressor mode Auto or Manual Customized value displayed -
      Evaporator Control Evaporator control Auto or Manual Customized value displayed -
      ECO MODE Cancel Function to cancel ECO mode when set to ON OFF or ON Customized value displayed -
      ECO Switch ECO HEAT/COOL switch (multi-display assembly) OFF or ON OFF: ECO HEAT/COOL switch (multi-display assembly) being turned OFF
      ON: ECO HEAT/COOL switch (multi-display assembly) being turned ON      		 -
      Refrigerant Shortage Check Refrigerant shortage check ON or OFF Customized value displayed -
      Fan speed increment control Fan speed increment control Slow / Normal / Fast Customized value displayed -
      Foot/DEF Auto Mode Foot/defroster auto mode ON or OFF Customized value displayed -
      Foot/DEF Auto Blow Up Foot/defroster auto blower speed increase ON or OFF Customized value displayed -
      Ambient Temperature Shift Ambient temperature shift 3C decr / 2C decr / 1C decr / Normal / 1C incr / 2C incr / 3C incr Customized value displayed -
      A/C Cutoff Signal A/C control cutoff signal ON or OFF The ECM sends the air conditioning control cutoff signal displayed -
      Glass Temperature - - - Cannot be used
      Glass Surroundings Temperature - - - Cannot be used
      Glass Humidity - - - Cannot be used
      Refrigerant Gas Type Refrigerant gas type R134a or 1234yf Refrigerant gas type displayed -
      FR Seat Heater Temperature - - - Although this item is displayed on the GTS, it is not applicable to the air conditioning system.
      FL Seat Heater Temperature - - - Although this item is displayed on the GTS, it is not applicable to the air conditioning system.
      RR Seat Heater Temperature - - - Although this item is displayed on the GTS, it is not applicable to the air conditioning system.
      RL Seat Heater Temperature - - - Although this item is displayed on the GTS, it is not applicable to the air conditioning system.
      Set Temperature (D Side) Driver side set temperature Min.: MAX COLD
      Max.: MAX HOT      		 Driver side set temperature displayed -
      Set Temperature (P Side) Front passenger side set temperature Min.: MAX COLD
      Max.: MAX HOT      		 Front passenger side set temperature displayed -
      Set Temperature (Rear) Rear passenger side set temperature Min.: MAX COLD
      Max.: MAX HOT      		 Rear passenger side set temperature displayed -
      Operation Limitation Control History Count (Level1) History of battery voltage drop in the past Min.: 0
      Max.: 255      		 Number of times battery voltage dropped in the past displayed
      • Counted when voltage drops below the specified level due to over discharge while driving.
      • *1
      Operation Limitation Control History Count (Level2) History of battery voltage drop in the past Min.: 0
      Max.: 255      		 Number of times battery voltage dropped in the past displayed
      • Counted when voltage drops below the specified level due to over discharge while driving.
      • *1
      Outside Air Mode Auto Switch Function Outside air mode auto switch function ON or OFF Customized value displayed -
      S-FLOW Control Auto Function S-FLOW control auto function ON or OFF Customized value displayed -
      Seat Blast Mode Setting - - - Although this item is displayed on the GTS, it is not applicable to the air conditioning system.
      Number of Trouble Codes Number of trouble codes Min.: 0
      Max.: 255      		 Number of DTCs displayed -
      Refrigerant High Pressure History Refrigerant high pressure history Min.: 0
      Max.: 255      		 Number of times refrigerant high pressure history stored displayed *2

      *1: Refer to the following procedure to clear the A/C operation limitation history.

      Refer to UTILITY [12/2019 - 11/2023] 

      *2: Refer to the following procedure to clear the refrigerant high pressure history.

      Refer to UTILITY [12/2019 - 11/2023] 

    2. Engine

      Powertrain > Engine > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Coolant Temperature Engine coolant temperature Min.: -40°C (-40°F)
      Max.: 140°C (284°F)      		 75 to 100°C (167 to 212°F): After warming up This is the engine coolant temperature.

      HINT: 

      • After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F).
      • After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal.
      • If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.
      • Check if the engine overheats if the value indicated is higher than 135°C (275°F).
  2. ACTIVE TEST 

    HINT: 

    Using the GTS to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Air Conditioner

      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      		 -
      Magnetic Clutch Relay Air conditioning system operation OFF or ON -
      Defogger Relay (Rear) Rear window defogger OFF or ON -
      Deicer Relay (Front) Windshield deicer OFF or ON -
      Heater Active Level Quick heater assembly Min.: 0
      Max.: 2      		 w/ Quick Heater
      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
      Air Outlet Servo Pulse (D) No. 2 air conditioning radiator damper servo sub-assembly (driver side mode) pulse Min.: 128
      Max.: 383      		 Operates between 164 to 278 pulses
      Air Inlet Damper Targ Pulse No. 1 blower damper servo sub-assembly pulse Min.: 128
      Max.: 383      		 Operates between 220 to 256 pulses
      Rear Blower Motor Rear blower motor with fan sub-assembly Min.: 0
      Max.: 31      		 -
      Rear Air Mix Servo Targ Pulse Rear air mix damper servo sub-assembly pulse Min.: 128
      Max.: 383      		 Operates between 213 to 258 pulses
      Air Outlet Servo Pulse (P) No. 1 air conditioning radiator damper servo sub-assembly (front passenger side mode) pulse Min.: 128
      Max.: 383      		 Operates between 234 to 348 pulses
      A/O Servo Pulse (Rr D) Rear mode damper servo sub-assembly pulse Min.: 128
      Max.: 383      		 Operates between 200 to 276 pulses
      HWD Relay - - Although this test is displayed on the GTS, it is not applicable to the air conditioning system.
      Front Right Seat Heater - - Although this test is displayed on the GTS, it is not applicable to the air conditioning system.
      Front Left Seat Heater - - Although this test is displayed on the GTS, it is not applicable to the air conditioning system.
      Rear Right Seat Heater - - Although this test is displayed on the GTS, it is not applicable to the air conditioning system.
      Rear Left Seat Heater - - Although this test is displayed on the GTS, it is not applicable to the air conditioning system.
      Front Right Seat Blower - - Although this test is displayed on the GTS, it is not applicable to the air conditioning system.
      Front Left Seat Blower - - Although this test is displayed on the GTS, it is not applicable to the air conditioning system.
    2. Engine

      Powertrain > Engine > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Control the Engine Cooling Fan Duty Ratio Control the electric cooling fan motor 0 to 100% Confirm that the vehicle is stopped.
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