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Home >> Lexus >> 2019 >> LC 500h >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> HEADUP Display System - Diagnostic Codes & Circuit Tests >> HEADUP Display System >> DTC B1321-87: Lost Communication with EMV Missing Message [05/2023 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • To measure the resistance of the CAN bus, turn the power switch off, wait at least 1 minutes without operating any keys or switches or opening or closing the doors, disconnect the auxiliary battery, wait at least 1 minutes again, and then measure the resistance.
  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Refer to BEFORE DISCONNECTING BATTERY [05/2023 - ]

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • When disconnecting the cable from the negative (-) auxiliary battery terminal.

    HINT: 

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [05/2023 - ]

HINT: