Climate parameters
The Lexus RX has 18 climate parameters.
● Confirmed◆ In testing○ Supported× Not supported
Adjusted ambient temperature RX_ADJUSTED_AMBIENT_TConfirmed
- Request
21 3D - Service 21
PID 3D - Module
7C4 → 7CC - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0xA5 = 165 → (165 × 81.6 ÷ 255 − 30.8) = 22 °C
- Formula
(val × 81.6 ÷ 255 − 30.8)- Range
- -30.8 to 50.8 °C
- Unit
- °C
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Air conditioner feedback RX_AC_FBConfirmed
- Request
21 51 - Service 21
PID 51 - Module
7E0 → 7E8 - Every
1 s - Testing for 1999 to 2012, 2014, 2016 to 2026
Example reply from a 2015 Lexus RX.
Bits 216 to 231 of the reply, 16 bits.
0x8000 = 32768 → (32768 × 10 ÷ 8192 − 40) = 0
- Formula
(val × 10 ÷ 8192 − 40)- Range
- -40 to 39.99
- Unit
- Number
Confirmed for 2013, 2015. In testing for 1999 to 2001, 2003 to 2004, 2007, 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2017, 2020, 2022, 2025 to 2026.
Air inlet damper actual pulse RX_AIR_INLET_DAMPER_ACTUAL_PULSEConfirmed
- Request
21 44 - Service 21
PID 44 - Module
7C4 - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 8 to 15 of the reply, 8 bits.
0x80 = 128 → 128
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Air inlet damper target pulse RX_AIR_INLET_DAMPER_TARGET_PULSEConfirmed
- Request
21 44 - Service 21
PID 44 - Module
7C4 - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x80 = 128 → 128
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Air outlet servo actual pulse, driver RX_AIR_OUTLET_SERVO_ACTU_PULSE_DConfirmed
- Request
21 43 - Service 21
PID 43 - Module
7C4 - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 8 to 15 of the reply, 8 bits.
0x80 = 128 → 128
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Air outlet servo pulse, driver RX_AIR_OUTLET_SERVO_PULSE_DConfirmed
- Request
21 43 - Service 21
PID 43 - Module
7C4 - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x80 = 128 → 128
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Ambient air temperature RX_AAT_7C4Confirmed
- Request
21 22 - Service 21
PID 22 - Module
7C4 → 7CC - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x82 = 130 → (130 × 89.25 ÷ 255 − 23.3) = 22.2 °C
- Formula
(val × 89.25 ÷ 255 − 23.3)- Range
- -23.3 to 65.95 °C
- Unit
- °C
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Ambient temperature RX_AMBIENT_TConfirmed
- Request
22 1F 46 - Service 22
DID 1F46 - Module
700 → 708 - Every
1 s - Testing for 1999 to 2019, 2021, 2023 to 2024
Example reply from a 2026 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x47 = 71 → (71 − 40) = 31 °C
- Formula
(val − 40)- Range
- -40 to 215 °C
- Unit
- °C
Confirmed for 2020, 2022, 2025 to 2026. In testing for 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2013, 2015, 2017.
Ambient temperature for A/C RX_AC_AMB_TConfirmed
- Request
21 51 - Service 21
PID 51 - Module
7E0 → 7E8 - Every
1 s - Testing for 1999 to 2012, 2014, 2016 to 2026
Example reply from a 2015 Lexus RX.
Bits 88 to 95 of the reply, 8 bits.
0x3D = 61 → (61 − 40) = 21 °C
- Formula
(val − 40)- Range
- -40 to 215 °C
- Unit
- °C
Confirmed for 2013, 2015. In testing for 1999 to 2001, 2003 to 2004, 2007, 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2010, 2017, 2020, 2022, 2025 to 2026.
Blower motor speed level RX_BLOWER_MOTOR_SPEED_LEVELConfirmed
- Request
21 3C - Service 21
PID 3C - Module
7C4 → 7CC - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x02 = 2 → 2
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Cabin temperature RX_CABIN_TConfirmed
- Request
21 21 - Service 21
PID 21 - Module
7C4 → 7CC - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x71 = 113 → (113 × 63.75 ÷ 255 − 6.5) = 21.75 °C
- Formula
(val × 63.75 ÷ 255 − 6.5)- Range
- -6.5 to 57.25 °C
- Unit
- °C
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Communication with air conditioner RX_COMM_WITH_AIR_CONDITIONERConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
1 s - Testing for 1999 to 2005, 2007, 2009, 2011 to 2012, 2014, 2016 to 2026
Example reply from a 2015 Lexus RX.
Bit 5 of the reply.
0b1 = 1 → 1
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2006, 2008, 2010, 2013, 2015. In testing for 1999 to 2001, 2003 to 2004, 2007, 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005, 2017, 2020, 2022, 2025 to 2026.
Communication with HV RX_COMMUNICATION_WITH_HVConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
1 s - Testing for 1999 to 2005, 2007, 2009, 2011 to 2012, 2014, 2016 to 2026
Example reply from a 2015 Lexus RX.
Bit 2 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Off or on
Confirmed for 2006, 2008, 2010, 2013, 2015. In testing for 1999 to 2001, 2003 to 2004, 2007, 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005, 2017, 2020, 2022, 2025 to 2026.
Communication with valvematic RX_COMM_WITH_VALVEMATIC_COMMConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7E0 → 7E8 - Every
1 s - Testing for 1999 to 2005, 2007, 2009, 2011 to 2012, 2014, 2016 to 2026
Example reply from a 2015 Lexus RX.
Bit 6 of the reply.
0b0 = 0 → 0
- Formula
val- Range
- 0 to 1
- Unit
- Number
Confirmed for 2006, 2008, 2010, 2013, 2015. In testing for 1999 to 2001, 2003 to 2004, 2007, 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005, 2017, 2020, 2022, 2025 to 2026.
Evaporator fin thermistor RX_EVAP_FIN_THERMISTORConfirmed
- Request
21 4B - Service 21
PID 4B - Module
7C4 → 7CC - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x55 = 85 → (85 × 89.25 ÷ 255 − 29.7) = 0.05 °C
- Formula
(val × 89.25 ÷ 255 − 29.7)- Range
- -29.7 to 59.55 °C
- Unit
- °C
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Evaporator target temperature RX_EVAP_TARGET_TConfirmed
- Request
21 4C - Service 21
PID 4C - Module
7C4 - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 15 of the reply, 16 bits.
0x8064 = 32868 → (32868 ÷ 100 − 327.68) = 1
- Formula
(val ÷ 100 − 327.68)- Range
- -327.68 to 327.67
- Unit
- Number
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
Set temperature, driver side RX_T_DRIVERConfirmed
- Request
21 29 - Service 21
PID 29 - Module
7C4 → 7CC - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016 to 2026
Example reply from a 2015 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x20 = 32 → 32 °C
- Formula
val- Range
- 0 to 255 °C
- Unit
- °C
Confirmed for 2010, 2013, 2015. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2017, 2020, 2022, 2025 to 2026.
Solar sensor, driver side RX_SOLAR_DRIVERConfirmed
- Request
21 24 - Service 21
PID 24 - Module
7C4 → 7CC - Every
1 s - Testing for 1999 to 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2026
Example reply from a 2022 Lexus RX.
Bits 0 to 7 of the reply, 8 bits.
0x00 = 0 → 0
- Formula
val- Range
- 0 to 255
- Unit
- Number
Confirmed for 2010, 2013, 2015, 2017, 2020, 2022. In testing for 2009, 2011 to 2012, 2014, 2016, 2018 to 2019, 2021, 2023 to 2024. Not supported for 2002, 2005 to 2006, 2008, 2025 to 2026.
