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Home › Lexus › 2009 › LS 600hL › Repair and Diagnosis › External Pages › Different car › Section 174 (Can Communication - Stop Mode Diagnostics, Bus Line Troubleshooting) › Display and Navigation Assembly Communication Stop Mode › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Operating the power switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire
    CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
    NOTE:
    • After the power switch is turned OFF, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the power switch OFF, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
    • When disconnecting the cable, some systems need to be initialized after the cable is reconnected (see INITIALIZATION ).
  2. CHECK FOR OPEN IN CAN BUS WIRE (DISPLAY AND NAVIGATION OR MULTI-DISPLAY BRANCH WIRE) 
    1. Disconnect the L59 display and navigation (multi-display) connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

    RESISTANCE SPECIFICATION

    Tester Connection Switch Condition Specified Condition
    L59-26 (CANH) - L59-2S (CANL) Power switch OFF 54 to 69 Ω
    Fig 1: Identifying L59 Connector Terminals
    G05787540Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE DISPLAY AND NAVIGATION OR MULTI-DISPLAY BRANCH WIRE OR CONNECTOR (CANH, CANL) 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION OR MULTI-DISPLAY - 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 (see INITIALIZATION ).
    2. Disconnect the L59 display and navigation (multi-display) connectors
    3. Measure the resistance according to the value(s) in the table below

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      L59-10 (GND1) - Body ground Always Below 1 Ω
    4. Measure the voltage according to the value(s) in the table below

      Standard voltage 

    VOLTAGE SPECIFICATION

    Tester Connection Switch Condition Specified Condition
    L59-1 (+B1) - Body ground Always 11 to 14 V
    L59-2 (ACC) - Body ground Power switch ON (ACC) 11 to 14 V
    L59-3 (IG) - Body ground Power switch ON (IG) 11 to 14 V
    Fig 2: Identifying L59 Connector Terminals
    G05787541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Result 

    RESULT REFERENCE

    Result Proceed to
    OK (w/ Navigation System for HDD) A
    OK (w/ Navigation System for DVD) B
    OK (w/o Navigation System) C
    NG D

    B: REPLACE MULTI-DISPLAY  (See REMOVAL )

    C: REPLACE MULTI-DISPLAY  (See REMOVAL )

    D: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    A: REPLACE DISPLAY AND NAVIGATION ASSEMBLY  (See REMOVAL )

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