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Home >> Lexus >> 2018 >> ES 350 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Navigation System (Diagnostic Codes & Symptom Tests) >> Navigation System >> DTC U0073: Sending Malfunction (Navigation to APGS); DTC U0100: Engine ECU Communication; DTC U0129: VSC(ECB)ECU Communication; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Meter ECU Communication; DTC U0164: Air Conditioner ECU Communication; DTC U0198: Lost Communication with Telematic Control Module; DTC U1110: Clearance Sonar ECU Communication [07/2015 - 08/2016] >> Procedure
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DTC U0073: Sending Malfunction (Navigation to APGS); DTC U0100: Engine ECU Communication; DTC U0129: VSC(ECB)ECU Communication; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Meter ECU Communication; DTC U0164: Air Conditioner ECU Communication; DTC U0198: Lost Communication with Telematic Control Module; DTC U1110: Clearance Sonar ECU Communication [07/2015 - 08/2016]: Procedure

  1. CHECK DTC 
    1. Clear the DTCs (Refer to DTC CHECK / CLEAR [07/2015 - 08/2016] ).
    2. Recheck for DTCs and check that no DTCs are output.

      OK

      No DTCs are output.

      Result

      Result Proceed to
      OK A
      NG (w/ Central Gateway ECU) B
      NG (w/o Central Gateway ECU) C

    Result:  A

    USE SIMULATION METHOD TO CHECK 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ] )

    Result:  B

    GO TO CAN COMMUNICATION SYSTEM (w/ Central Gateway ECU) 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ] )

    Result:  C

    GO TO CAN COMMUNICATION SYSTEM (w/o Central Gateway ECU) 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ] )