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Home >> Toyota >> 2021 >> Sequoia TRD Pro >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> DTC C1A4B: Stop Light Relay Circuit [08/2017 - 08/2019] >> Caution / Notice / Hint
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Caution / Notice / Hint

NOTE:
  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
  • If the millimeter wave radar sensor assembly has been replaced, be sure to perform millimeter wave radar sensor assembly adjustment.

    Refer to ADJUSTMENT [08/2017 - 08/2018] , or refer to ADJUSTMENT [08/2018 - ]

  • The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - 08/2019]

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