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Home >> Toyota >> 2015 >> Avalon XLE >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System (W/O Central Gateway Ecu) - Diagnostic Codes & Circuit Tests - (Except Hybrid) >> CAN COMMUNICATION SYSTEM (W/O Central Gateway ECU) >> DTC U0233: Lost Communication with Blind Spot Monitor Master Module [10/2014 - 10/2015] >> Procedure

DTC U0233: Lost Communication with Blind Spot Monitor Master Module [10/2014 - 10/2015]: Procedure

  1. RECONFIRM DTC OUTPUT 
    1. Reconfirm DTCs.

      HINT: 

      If DTC U1002 is output from Gateway of the network gateway ECU, this indicates a sub bus 2 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 2.

      Result

      Result Proceed to
      U1002 is not output from network gateway ECU.
      (Techstream display: Gateway)      		 A
      U1002 is output from network gateway ECU.
      (Techstream display: Gateway)      		 B

    B 

    Refer to DTC U1002: Lost Communication with Gateway Module (Network Gateway ECU) [10/2014 - 10/2015] )

    A 

    See step  2

  2. CHECK FOR OPEN IN CAN BUS LINES (BLIND SPOT MONITOR SENSOR LH BRANCH LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the O10 blind spot monitor sensor LH connector.
      GTY576780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-2 (CA1P) - O10-7 (CA1N) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH) 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL) 
    1. Measure the resistance according to the value (s) in the table below.
      GTY586100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)

      Standard Resistance

      Tester Connection Condition Specified Condition
      O10-10 (BLGD) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) 
    1. Connect the cable to the negative (-) battery terminal.
    2. Measure the voltage according to the value (s) in the table below.
      GTY593531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)

      Standard Voltage

      Tester Connection Condition Specified Condition
      O10-5 (BLB) - Body ground Engine switch on (IG) 11 to 14 V

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH 

    Refer to REMOVAL [10/2014 - ] )

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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