LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2016 >> LS 460 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (Diagnostic Codes & Circuit Tests) >> Circuit Tests >> Multi-media Module Receiver Assembly Communication Stop Mode [09/2015 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Multi-media Module Receiver Assembly Communication Stop Mode [09/2015 - ]: Procedure

  1. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Refer to PRECAUTION [09/2015 - ] ).

    Result:  NEXT

    NEXT 

    See step  2

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

    Result:  NEXT

    NEXT 

    See step  3

  3. CHECK FOR OPEN IN CAN BUS WIRE (MULTI-MEDIA MODULE RECEIVER ASSEMBLY CAN BRANCH WIRE) 
    1. Disconnect the multi-media module receiver assembly connector.
      GTY623626Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Side Marker
      *B w/o Side Marker
      *a Front view of wire harness connector
      (to Multi-media Module Receiver Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      W/ SIDE MARKER:

      Tester Connection Switch Condition Specified Condition
      L146-1 (CANH) - L146-2 (CANL) Engine switch off 54 to 69 Ω
      W/O SIDE MARKER:

      Tester Connection Switch Condition Specified Condition
      s1-1 (CANH) - s1-2 (CANL) Engine switch off 54 to 69 Ω

    Result:  NG

    NG 

    REPAIR OR REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL) 

    Result:  OK

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - BATTERY AND BODY GROUND) 
    1. Connect the cable to the negative (-) battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

      GTY623620Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Side Marker
      *B w/o Side Marker
      *a Front view of wire harness connector
      (to Multi-media Module Receiver Assembly)
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      W/ SIDE MARKER:

      Tester Connection Condition Specified Condition
      L146-17 (+B1) - Body ground Always 11 to 14 V
      L146-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      L146-16 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V
      W/O SIDE MARKER:

      Tester Connection Condition Specified Condition
      s1-17 (+B1) - Body ground Always 11 to 14 V
      s1-15 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      s1-16 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      W/ SIDE MARKER:

      Tester Connection Condition Specified Condition
      L146-12 (GND1) - Body ground Always Below 1 Ω
      W/O SIDE MARKER:

      Tester Connection Condition Specified Condition
      s1-12 (GND1) - Body ground Always Below 1 Ω

    Result:  OK

    OK 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR