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Home >> Lexus >> 2016 >> GS 350 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> DTC B150A: Lost Communication with HMI-LAN [10/2015 - ] >> Procedure

DTC B150A: Lost Communication with HMI-LAN [10/2015 - ]: Procedure

  1. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Navigation System A
      w/o Navigation System B

    Result: 

    B 

    See step  3

    Result: 

    A 

    See step  2

  2. CHECK FOR DTC (NAVIGATION SYSTEM) 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

      OK

      DTCs are not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO NAVIGATION SYSTEM . Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2015 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK FOR DTC (AUDIO AND VISUAL SYSTEM) 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

      OK

      DTCs are not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO AUDIO AND VISUAL SYSTEM . Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - MULTI-MEDIA MODULE RECEIVER ASSEMBLY) 
    1. Disconnect the N39 combination meter assembly connector.
    2. Disconnect the N58 multi-media module receiver assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N39-10 (TX+) - N58-3 (CNH1) Always Below 1 Ω
      N39-9 (TX-) - N58-4 (CNL1) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK COMBINATION METER ASSEMBLY 
    1. Replace the combination meter assembly.

      Refer to REMOVAL [09/2014 - ]

    2. Turn the engine switch on (IG) and wait 30 seconds.
      NOTE:

      A maximum of 30 seconds is required to send/receive the registration information between the combination meter assembly and radio receiver assembly.

    3. Operate the steering pad switch assembly and check that the audio tab illuminates.
    4. Check for DTCs.

      Refer to DTC CHECK / CLEAR [09/2014 - ]

      Body Electrical > Combination Meter > Trouble Codes 

      OK

      The audio tab illuminates and DTC B150A is not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END (COMBINATION METER ASSEMBLY IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY . Refer to  REMOVAL [09/2014 - 09/2017]  Refer to  REMOVAL [09/2017 - ]