HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): DATA LIST / ACTIVE TEST; 2020 MY Corolla Corolla HV [01/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001H973
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 04/2020]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): DATA LIST / ACTIVE TEST; 2020 MY Corolla Corolla HV [01/2019 - 04/2020]

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

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 Techstream 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.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus:

(1) for Air Conditioner: Body Electrical / Air Conditioner / Data List.

(2) for Engine: Powertrain / Engine / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Air Conditioner > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Room Temperature Sensor	Cooler (room temp. sensor) thermistor	Min.: -6.50°C (20.30°F) Max.: 57.25°C (135.05°F)	Actual cabin temperature displayed	Cooler (room temp. sensor) thermistor circuit malfunction When open circuit: -6.50°C (20.30°F) When short circuit: 57.25°C (135.05°F)
Ambient Temp Sensor	Thermistor assembly	Min.: -23.30°C (-9.94°F) Max.: 65.95°C (150.71°F)	Actual ambient temperature displayed	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	No. 1 cooler thermistor	Min.: -29.70°C (-21.46°F) Max.: 59.55°C (139.19°F)	Actual evaporator temperature displayed	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	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)	Automatic light control sensor1 Cooler (solar sensor) thermistor2	Min.: 0 Max.: 255	Automatic light control sensor1 or cooler (solar sensor) thermistor2 value increases as brightness increases	Automatic light control sensor1 or cooler (solar sensor) thermistor2 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 Max.: 3294.37 kPaG	Actual refrigerant pressure displayed	Refrigerant line (gas leak etc.) Air conditioner pressure sensor circuit malfunction
Air Outlet Servo Pulse (R)	No. 2 air conditioning radiator damper servo sub-assembly target pulse	Min.: 128 Max.: 383	FACE: 250 (pulse) B/L: 281 (pulse) FOOT: 287 (pulse) F/D: 297 (pulse) SHUT: 250 (pulse) D/F: 272 (pulse)	No. 2 air conditioning radiator damper servo sub-assembly circuit malfunction*3
Air Outlet Servo Actual Pls(R)	No. 2 air conditioning radiator damper servo sub-assembly actual pulse	Min.: 128 Max.: 383	FACE: 250 (pulse) B/L: 281 (pulse) FOOT: 287 (pulse) F/D: 297 (pulse) SHUT: 250 (pulse) D/F: 272 (pulse)	No. 2 air conditioning radiator damper servo sub-assembly circuit malfunction*3
Air Mix Servo Targ Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly target pulse	Min.: 128 Max.: 383	MAX COLD: 257 (pulse) MAX HOT: 165 (pulse)	No. 1 air conditioning radiator damper servo sub-assembly circuit malfunction
Air Mix Servo Actual Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly actual pulse	Min.: 128 Max.: 383	MAX COLD: 257 (pulse) MAX HOT: 165 (pulse)	No. 1 air conditioning radiator damper servo sub-assembly circuit malfunction
Air Outlet Servo Pulse (D)	No. 3 air conditioning radiator damper servo sub-assembly 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 SHUT: 164 (pulse) S-FLOW: 278 (pulse)	No. 3 air conditioning radiator damper servo sub-assembly circuit malfunction
Air Outlet Servo Actu Pulse(D)	No. 3 air conditioning radiator damper servo sub-assembly 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 SHUT: 164 (pulse) S-FLOW: 278 (pulse)	No. 3 air conditioning radiator damper servo sub-assembly circuit malfunction
Air Outlet Servo Targ Pulse(P)	No. 1 air conditioning radiator damper servo sub-assembly 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 SHUT: 348 (pulse) S-FLOW: 234 (pulse)	No. 1 air conditioning radiator damper servo sub-assembly circuit malfunction
Air Outlet Servo Actu Pulse(P)	No. 1 air conditioning radiator damper servo sub-assembly 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 SHUT: 348 (pulse) S-FLOW: 234 (pulse)	No. 1 air conditioning radiator damper servo sub-assembly 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*4
Electric Heater Active Level	Actual electric heater operation level	Min.: 0 Max.: 3	Actual operation level of electric heater displayed	PTC heater circuit malfunction*4
Compressor Speed	Compressor speed	Min.: 0 rpm Max.: 65535 rpm	Actual compressor speed displayed	-
Compressor Target Speed	Compressor target speed	Min.: 0 rpm Max.: 65535 rpm	Compressor target speed displayed	-
Shift Set Temperature	Shift set temperature	2C decr, 1C decr, Normal, 1C incr or 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	-
Noise and Vibration Reduction	Function to change the speed of the compressor when set to ON	OFF or ON	Customized value displayed	-
ECO MODE Cancel	Function to cancel ECO mode when set to ON	OFF or ON	Customized value displayed	-
Refrigerant Shortage Check	Refrigerant shortage check	ON or OFF	Customized value displayed	-
Fan speed increment control	Fan speed increment control	Slow, Normal or 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 or 3C incr	Customized value displayed	-
Compressor Drive Check	Compressor drive check	OK or NG	OK: Compressor drives NG: Compressor does not drive	-
Refrigerant Gas Type	Refrigerant gas type	R134a or 1234yf	Refrigerant gas type displayed	-
Set Temperature (D Side)	Driver side set temperature	Min.: MAX COLD Max.: MAX HOT	Driver side set temperature displayed	-
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	-
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	*5

*1: w/ Automatic Light Control
*2: w/o Automatic Light Control
*3: for Cold Area Spec.
*4: w/ PTC Heater
*5: Refer to the following procedure to clear the refrigerant high pressure history.
Click here

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).

ACTIVE TEST

HINT:

Using the Techstream 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.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus:

(1) for Air Conditioner: Body Electrical / Air Conditioner / Active Test.

(2) for Engine: Powertrain / Engine / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Air Conditioner > Active Test

*3: for Cold Area Spec. *3: for Cold Area Spec.

Tester Display	Measurement Item	Control Range	Diagnostic Note
Blower Motor	Blower motor with fan sub-assembly	Min.: 0 Max.: 31	-
Compressor Target Speed	Compressor with motor assembly	Min.: 0 Max.: 7500	-
Heater Active Level	Quick heater assembly	Min.: 0 Max.: 3	w/ PTC Heater
Air Mix Servo Targ Pulse(D)	No. 1 air conditioning radiator damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 165 and 257 pulses
Air Outlet Servo Pulse (D)	No. 3 air conditioning radiator damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 164 and 278 pulses
Air Inlet Damper Targ Pulse	No. 1 blower damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 220 and 256 pulses
Air Outlet Servo Pulse (P)	No. 1 air conditioning radiator damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 234 and 348 pulses
A/O Servo Pulse(Rr D)	No. 2 air conditioning radiator damper servo sub-assembly pulse	Min.: 128 Max.: 383	Operates between 250 and 297 pulses*

*: for Cold Area Spec.

Powertrain > Engine > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Control the Engine Cooling Fan	Control electric cooling fan motor	OFF, Low or High	Perform this test when vehicle is stopped.