Keyless Access Control Unit - Diagnostics

• How to Information
  • How to Troubleshoot the Body Electrical (2019 2020 2021)
    • Before Troubleshooting
    • Loss of Communication DTC Cross-Reference Chart
• DTC Troubleshooting
  • DTC B1601
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC B1602
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC B1627
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Power Supply (RF_VCC1), Communication (RF_DATA1), GND (RF_GND) Circuit Inspection
      • 2-Way Transceiver Inspection
      • Roof Antenna Inspection
  • DTC B1632
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Electric Steering Lock Inspection
      • Signal (MTR_CONT) Shorted Wire Inspection
      • Body Control Module Inspection
  • DTC B1640
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC B1645
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_FR_DR+), Signal (EXT_FR_DR-) Shorted Wire Inspection
      • Left-Front LF Antenna/Initiator Inspection
  • DTC B1646
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_FR_DR+), Signal (EXT_FR_DR-) Open Wire Inspection
      • Left-Front LF Antenna/Initiator Inspection
  • DTC B1647
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_FR_AS+), Signal (EXT_FR_AS-) Shorted Wire Inspection
      • Right-Front LF Antenna/Initiator Inspection
  • DTC B1648
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_FR_AS+), Signal (EXT_FR_AS-) Open Wire Inspection
      • Right-Front LF Antenna/Initiator Inspection
  • DTC B1649
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_RR_L+), Signal (EXT_RR_L-) Shorted Wire Inspection
      • Left-Rear LF Antenna/Initiator Inspection
  • DTC B1650
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_RR_L+), Signal (EXT_RR_L-) Open Wire Inspection
      • Left-Rear LF Antenna/Initiator Inspection
  • DTC B1651
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_RR_R+), Signal (EXT_RR_R-) Shorted Wire Inspection
      • Right-Rear LF Antenna/Initiator Inspection
  • DTC B1652
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_RR_R+), Signal (EXT_RR_R-) Open Wire Inspection
      • Right-Rear LF Antenna/Initiator Inspection
  • DTC B1657
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_TG+), Signal (EXT_TG-) Shorted Wire Inspection
      • Rear Bumper LF Antenna Inspection
  • DTC B1658
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_TG+), Signal (EXT_TG-) Open Wire Inspection
      • Rear Bumper LF Antenna Inspection
  • DTC B1659
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_F+), Signal (EXT_F-) Shorted Wire Inspection
      • Front Interior LF Antenna Inspection
  • DTC B1660
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_F+), Signal (EXT_F-) Open Wire Inspection
      • Front Interior LF Antenna Inspection
  • DTC B1667
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_M+), Signal (EXT_M-) Shorted Wire Inspection
      • Rear Interior LF Antenna Inspection
  • DTC B1668
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Body Control Module Inspection
      • Signal (EXT_M+), Signal (EXT_M-) Open Wire Inspection
      • Rear Interior LF Antenna Inspection
  • DTC U1280 (Keyless Access Control Unit)
    • Notes
    • Overview
  • DTC U1281 (Keyless Access Control Unit)
    • Notes
    • Overview
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
  • DTC U128D (Keyless Access Control Unit)
    • Notes
    • Overview
    • Inspection Area
    • Inspection Outline
    • Confirmation Procedure
    • Related Information
    • HDS Function
    • Inspection
      • Communication (B-CAN_H), Communication (B-CAN_L) Open Wire Inspection