Climate parameters
The Toyota Prius has 21 climate parameters.
● Confirmed◆ In testing○ Supported× Not supported
Adjusted ambient temperature PRIUS_ADJUSTED_AMBIENT_TConfirmed
- Request
21 3D - Service 21
PID 3D - Module
7C4 → 7CC - Every
5 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x8B = 139 → (139 × 81.6 ÷ 255 − 30.8) = 13.68 °C
- Formula
(val × 81.6 ÷ 255 − 30.8)- Range
- -30.8 to 50.8 °C
- Unit
- °C
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Air conditioning inverter gate PRIUS_AC_GATEConfirmed
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing for 1997 to 2008
Example reply from a 2009 Toyota Prius.
Bit 67 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2009. In testing for 2004 to 2008.
Air conditioning power consumption PRIUS_AC_PWR
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing for 1997 to 2008
Bits 120 to 127 of the reply, 8 bits.
- Formula
(val ÷ 51)- Range
- 0 to 5 kW
- Unit
- kW
In testing for 2004 to 2008.
Air conditioning requested PRIUS_AC_REQConfirmed
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing for 1997 to 2008
Example reply from a 2009 Toyota Prius.
Bit 14 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2009. In testing for 2004 to 2008.
Air inlet damper actual pulse PRIUS_AIR_INLET_DAMPER_ACTUAL_PULSEConfirmed
- Request
21 44 - Service 21
PID 44 - Module
7C4 → 7CC - Every
1 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 8 to 15 of the reply, 8 bits.
0x5C = 92 → 92
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Air inlet damper target pulse PRIUS_AIR_INLET_DAMPER_TARGET_PULSEConfirmed
- Request
21 44 - Service 21
PID 44 - Module
7C4 → 7CC - Every
1 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x5C = 92 → 92
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Air outlet servo actual pulse, driver PRIUS_AIR_OUTLET_SERVO_ACTU_PULSE_DConfirmed
- Request
21 43 - Service 21
PID 43 - Module
7C4 → 7CC - Every
1 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 8 to 15 of the reply, 8 bits.
0x57 = 87 → 87
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Air outlet servo pulse, driver PRIUS_AIR_OUTLET_SERVO_PULSE_DConfirmed
- Request
21 43 - Service 21
PID 43 - Module
7C4 → 7CC - Every
1 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x57 = 87 → 87
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
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 2007 to 2008. Supported for 2009 to 2010, 2012 to 2016, 2019 to 2020, 2022 to 2026.
Ambient air temperature PRIUS_AAT_7C4Confirmed
- Request
21 22 - Service 21
PID 22 - Module
7C4 → 7CC - Every
5 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x73 = 115 → (115 × 89.25 ÷ 255 − 23.3) = 16.95 °C
- Formula
(val × 89.25 ÷ 255 − 23.3)- Range
- -23.3 to 65.95 °C
- Unit
- °C
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Ambient temperature PRIUS_AMBIENT_TConfirmed
- Request
22 1F 46 - Service 22
DID 1F46 - Module
700 → 708 - Every
5 s - Testing for 1997 to 2023, 2026
Example reply from a 2025 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x3C = 60 → (60 − 40) = 20 °C
- Formula
(val − 40)- Range
- -40 to 215 °C
- Unit
- °C
Confirmed for 2024 to 2025. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2016.
Blower motor speed level PRIUS_BLOWER_MOTOR_SPEED_LEVELConfirmed
- Request
21 3C - Service 21
PID 3C - Module
7C4 → 7CC - Every
5 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x04 = 4 → 4
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Cabin temperature PRIUS_CABIN_TConfirmed
- Request
21 21 - Service 21
PID 21 - Module
7C4 → 7CC - Every
5 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x69 = 105 → (105 × 63.75 ÷ 255 − 6.5) = 19.75 °C
- Formula
(val × 63.75 ÷ 255 − 6.5)- Range
- -6.5 to 57.25 °C
- Unit
- °C
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Climate control engine run requested PRIUS_HVAC_REQConfirmed
- Request
21 C4 - Service 21
PID C4 - Module
7E2 → 7EA - Every
250 ms - Testing for 1997 to 2008
Example reply from a 2009 Toyota Prius.
Bit 12 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2009. In testing for 2004 to 2008.
Communication with air conditioner PRIUS_COMM_WITH_AIR_CONDITIONERConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
5 s - Testing for 1997 to 2008, 2010 to 2026
Example reply from a 2009 Toyota Prius.
Bit 5 of the reply.
0b1 = 1 → 1
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2009. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2013, 2016, 2024 to 2025.
Communication with HV PRIUS_COMMUNICATION_WITH_HVConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
5 s - Testing for 1997 to 2008, 2010 to 2026
Example reply from a 2009 Toyota Prius.
Bit 2 of the reply.
0b1 = 1 → 1
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2009. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2013, 2016, 2024 to 2025.
Communication with valvematic PRIUS_COMM_WITH_VALVEMATIC_COMMConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
5 s - Testing for 1997 to 2008, 2010 to 2026
Example reply from a 2009 Toyota Prius.
Bit 6 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Number
Confirmed for 2009. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2013, 2016, 2024 to 2025.
Evaporator fin thermistor PRIUS_EVAP_FIN_THERMISTORConfirmed
- Request
21 4B - Service 21
PID 4B - Module
7C4 → 7CC - Every
5 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x87 = 135 → (135 × 89.25 ÷ 255 − 29.7) = 17.55 °C
- Formula
(val × 89.25 ÷ 255 − 29.7)- Range
- -29.7 to 59.55 °C
- Unit
- °C
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Evaporator target temperature PRIUS_EVAP_TARGET_TConfirmed
- Request
21 4C - Service 21
PID 4C - Module
7C4 → 7CC - Every
1 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 15 of the reply, 16 bits.
0x844C = 33868 → (33868 ÷ 100 − 327.68) = 11
- Formula
(val ÷ 100 − 327.68)- Range
- -327.68 to 327.67
- Unit
- Number
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
Set temperature, driver side PRIUS_T_DRIVER
- Request
21 29 - Service 21
PID 29 - Module
7C4 → 7CC - Every
5 s - Testing
Bits 0 to 7 of the reply, 8 bits.
- Formula
val- Range
- 0 to 255 °C
- Unit
- °C
In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2016, 2024 to 2025.
Solar sensor, driver side PRIUS_SOLAR_DRIVERConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7C4 → 7CC - Every
1 s - Testing for 1997 to 2015, 2017 to 2026
Example reply from a 2016 Toyota Prius.
Bits 0 to 7 of the reply, 8 bits.
0x0D = 13 → 13
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2016. In testing for 1997 to 2008, 2010 to 2012, 2014 to 2015, 2017 to 2023, 2026. Not supported for 2009, 2013, 2024 to 2025.
