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Home >> Lexus >> 2008 >> LX 570 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Cellular Communication >> LEXUS Link System >> DTC 5-1: LEXUS Link Communication Error >> Inspection Procedure

Inspection Procedure

  1. CHECK FOR DTC (BLINKING PATTERN) 
    1. Turn the engine switch from on (IG) to off.
    2. Turn the engine switch on (IG) and wait for 10 seconds.
    3. Check for DTCs and wait for 20 seconds (See DTC CHECK / CLEAR ).

    OK: DTC 5-1 is not output. 

    NG:  Go to step  2

    OK: CLEAR HISTORIC DTC  (See DTC CHECK / CLEAR )

  2. CHECK FOR DTC 
    1. Check for DTCs using the Techstream (See DIAGNOSIS SYSTEM ).

    HINT:

    The bus buffer ECU is connected to the CAN. Check that there are no CAN communication system DTCs output.

    Result 

    DTC RESULT REFERENCE

    Result Proceed to
    No DTC output A
    DTC related to CAN communication system output B

    HINT:

    "U" codes are CAN communication system codes.

    B: GO TO CAN COMMUNICATION SYSTEM  (See CAN COMMUNICATION SYSTEM )

    A: Go to next step 

  3. CHECK HEADLIGHT DIMMER SWITCH 
    1. When the headlight dimmer switch is set to the low beam position, check that the hazard switch illuminates.

    OK: Hazard switch illuminates. 

    HINT:

    The telephone ECU assembly uses the dimmer switch signal from the main body ECU to judge if communication has stopped.

    NG: GO TO LIGHTING SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

    OK: Go to next step 

  4. REPLACE TELEPHONE ECU ASSEMBLY TOGETHER WITH MAYDAY BATTERY 

    NEXT: PERFORM REGISTRATION  (See REGISTRATION )

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