Climate parameters
The Toyota Corolla has 20 climate parameters.
● Confirmed◆ In testing○ Supported× Not supported
Adjusted ambient temperature COROLLA_ADJUSTED_AMBIENT_TConfirmed
- Request
21 3D - Service 21
PID 3D - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2008, 2010 to 2011, 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x97 = 151 → (151 × 81.6 ÷ 255 − 30.8) = 17.52 °C
- Formula
(val × 81.6 ÷ 255 − 30.8)- Range
- -30.8 to 50.8 °C
- Unit
- °C
Confirmed for 2009, 2012, 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2010, 2023 to 2024.
Air conditioning inverter gate COROLLA_AC_GATE
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing
Bit 67 of the reply.
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2014, 2021 to 2025.
Air conditioning power consumption COROLLA_AC_PWR
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing
Bits 120 to 127 of the reply, 8 bits.
- Formula
(val ÷ 51)- Range
- 0 to 5 kW
- Unit
- kW
In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2014, 2021 to 2025.
Air conditioning requested COROLLA_AC_REQ
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing
Bit 14 of the reply.
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2014, 2021 to 2025.
Air inlet damper actual pulse COROLLA_AIR_INLET_DAMPER_ACTUAL_PULSEConfirmed
- Request
21 44 - Service 21
PID 44 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 8 to 15 of the reply, 8 bits.
0x82 = 130 → 130
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2023 to 2024.
Air inlet damper target pulse COROLLA_AIR_INLET_DAMPER_TARGET_PULSEConfirmed
- Request
21 44 - Service 21
PID 44 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x82 = 130 → 130
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2023 to 2024.
Air outlet servo actual pulse, driver COROLLA_AIR_OUTLET_SERVO_ACTU_PULSE_DConfirmed
- Request
21 43 - Service 21
PID 43 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 8 to 15 of the reply, 8 bits.
0x8B = 139 → 139
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2023 to 2024.
Air outlet servo pulse, driver COROLLA_AIR_OUTLET_SERVO_PULSE_DConfirmed
- Request
21 43 - Service 21
PID 43 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x8B = 139 → 139
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2023 to 2024.
Ambient air temperature AATSAE J1979Confirmed
- Request
01 46 - Service 01
PID 46 - Module
7E0 → 7E8 - Every
15 s
Bits 0 to 7 of the reply, 8 bits.
- Formula
(val − 40)- Range
- -40 to 215 °C
- Unit
- °C
Confirmed for 2013, 2020 to 2022. Supported for 2019, 2023 to 2026.
Ambient air temperature COROLLA_AAT_7C4Confirmed
- Request
21 22 - Service 21
PID 22 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2008, 2010 to 2011, 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x74 = 116 → (116 × 89.25 ÷ 255 − 23.3) = 17.3 °C
- Formula
(val × 89.25 ÷ 255 − 23.3)- Range
- -23.3 to 65.95 °C
- Unit
- °C
Confirmed for 2009, 2012, 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2010, 2023 to 2024.
Ambient temperature COROLLA_AMBIENT_TConfirmed
- Request
22 1F 46 - Service 22
DID 1F46 - Module
700 → 708 - Every
1 s - Testing for 1988 to 2022, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x3E = 62 → (62 − 40) = 22 °C
- Formula
(val − 40)- Range
- -40 to 215 °C
- Unit
- °C
Confirmed for 2023 to 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2014, 2021 to 2022.
Blower motor speed level COROLLA_BLOWER_MOTOR_SPEED_LEVELConfirmed
- Request
21 3C - Service 21
PID 3C - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x01 = 1 → 1
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2023 to 2024.
Cabin temperature COROLLA_CABIN_TConfirmed
- Request
21 21 - Service 21
PID 21 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x6F = 111 → (111 × 63.75 ÷ 255 − 6.5) = 21.25 °C
- Formula
(val × 63.75 ÷ 255 − 6.5)- Range
- -6.5 to 57.25 °C
- Unit
- °C
Confirmed for 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2023 to 2024.
Climate control engine run requested COROLLA_HVAC_REQ
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing
Bit 12 of the reply.
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2014, 2021 to 2025.
Communication with air conditioner COROLLA_COMM_WITH_AIR_CONDITIONERConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
1 s - Testing for 1988 to 2008, 2010 to 2020, 2023 to 2026
Example reply from a 2022 Toyota Corolla.
Bit 5 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2009, 2021 to 2022. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2010, 2012, 2014, 2023 to 2025.
Communication with HV COROLLA_COMMUNICATION_WITH_HVConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
1 s - Testing for 1988 to 2008, 2010 to 2020, 2023 to 2026
Example reply from a 2022 Toyota Corolla.
Bit 2 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2009, 2021 to 2022. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2010, 2012, 2014, 2023 to 2025.
Communication with valvematic COROLLA_COMM_WITH_VALVEMATIC_COMMConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
1 s - Testing for 1988 to 2008, 2010 to 2020, 2023 to 2026
Example reply from a 2022 Toyota Corolla.
Bit 6 of the reply.
0b1 = 1 → 1
- Formula
val- Range
- 0 to 1
- Unit
- Number
Confirmed for 2009, 2021 to 2022. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2010, 2012, 2014, 2023 to 2025.
Evaporator fin thermistor COROLLA_EVAP_FIN_THERMISTORConfirmed
- Request
21 4B - Service 21
PID 4B - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2008, 2010 to 2011, 2013, 2015 to 2020, 2023 to 2024, 2026
Example reply from a 2025 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x5A = 90 → (90 × 89.25 ÷ 255 − 29.7) = 1.8 °C
- Formula
(val × 89.25 ÷ 255 − 29.7)- Range
- -29.7 to 59.55 °C
- Unit
- °C
Confirmed for 2009, 2012, 2014, 2021 to 2022, 2025. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2010, 2023 to 2024.
Set temperature, driver side COROLLA_T_DRIVERConfirmed
- Request
21 29 - Service 21
PID 29 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2026
Example reply from a 2014 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x28 = 40 → 40 °C
- Formula
val- Range
- 0 to 255 °C
- Unit
- °C
Confirmed for 2014. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2021 to 2025.
Solar sensor, driver side COROLLA_SOLAR_DRIVERConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7C4 → 7CC - Every
1 s - Testing for 1988 to 2013, 2015 to 2026
Example reply from a 2014 Toyota Corolla.
Bits 0 to 7 of the reply, 8 bits.
0x04 = 4 → 4
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2014. In testing for 1988 to 2008, 2011, 2013, 2015 to 2020, 2026. Not supported for 2009 to 2010, 2012, 2021 to 2025.
