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Toyota Yaris Cross

Light parameters

The Toyota Yaris Cross has 9 light parameters.

● Confirmed◆ In testing○ Supported× Not supported

How to read a parameter card

Check engine SW YCROSS_CHECK_ENGINE_LIGHTConfirmed

  • Request21 12
  • Service 21PID 12
  • Module7C0 → 7C8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 15 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

  1. The parameter's name and its ID in the OBDb. Confirmed shows when a response from a real car confirms the parameter.
  2. The clutch mark shows a Connectable, a parameter that Pelican surfaces in its interface.
  3. The service and PID/DID asked for, the control module it's sent to, and how often Pelican asks.
  4. The reply's bytes. The parameter's bytes are blue. Bytes for other parameters in the same reply are grayed out. Hover over a byte to see the parameter it represents.
  5. Where the parameter is in the response, and how Pelican converts the raw value into a value.
  6. A real reply, decoded. The raw value comes first, then the reading.
  7. Which model years have tested this parameter.

Check engine SW YCROSS_CHECK_ENGINE_LIGHTConfirmed

  • Request21 12
  • Service 21PID 12
  • Module7C0 → 7C8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 15 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

Hazard switch history YCROSS_HAZARD_SWITCH_HISTORY

  • Request21 BC
  • Service 21PID BC
  • Module7B0 → 7B8
  • Every3600 s
  • Testing

Bit 2 of the reply.

Unit
Named states
States
Raw valueStateMeaning
0INCOMPLETEIncomplete
1COMPLETEComplete

In testing for 2020 to 2021, 2023 to 2024, 2026. Not supported for 2022, 2025.

Oil pressure switch YCROSS_EOP_LIGHTConfirmed

  • Request21 12
  • Service 21PID 12
  • Module7C0 → 7C8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 35 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

P-seatbelt buckle SW YCROSS_P_SEATBELT_BUCKLE_LIGHTConfirmed

  • Request21 12
  • Service 21PID 12
  • Module7C0 → 7C8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 8 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

Rheostat YCROSS_RHEOSTAT

Higher values are brighter

  • Request21 68
  • Service 21PID 68
  • Module7C0 → 7C8
  • Every1 s
  • Testing

Bits 0 to 7 of the reply, 8 bits.

Formula
val
Range
0 to 255
Unit
Number

In testing for 2020 to 2021, 2023 to 2024, 2026. Not supported for 2022, 2025.

Stop light YCROSS_STOP_LIGHT_SWConfirmed

  • Request21 1F
  • Service 21PID 1F
  • Module7B0 → 7B8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 0 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

Stop light YCROSS_STOP_LIGHT_SWITCHConfirmed

  • Request21 25
  • Service 21PID 25
  • Module7E0 → 7E8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 5 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Number

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

Stop light relay YCROSS_STOP_LIGHT_RELAYConfirmed

  • Request21 3C
  • Service 21PID 3C
  • Module7B0 → 7B8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 0 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

Tail cancel SW YCROSS_TAIL_CANCEL_LIGHTConfirmed

  • Request21 12
  • Service 21PID 12
  • Module7C0 → 7C8
  • Every1 s
  • Testing for 2020 to 2024, 2026

Example reply from a 2025 Toyota Yaris Cross.

Bit 2 of the reply.

0b0 = 0 → 0

Formula
val
Range
0 to 1
Unit
Off or on

Confirmed for 2025. In testing for 2020 to 2021, 2024, 2026. Not supported for 2022 to 2023.

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