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DTC U1110: Lost Communication with Clearance Sonar Module [02/2014 - 11/2016]: Procedure

  1. RECONFIRM DTC OUTPUT 

    Body Electrical > PM1 Gateway > Trouble Codes 

    1. Reconfirm DTCs.

      HINT: 

      If DTC U1002 is output from PM1 Gateway of the power management control ECU, this indicates a sub bus 11 malfunction. Troubleshoot for DTC U1002 and check for malfunctions in sub bus 11.

      Result

      Result Proceed to
      U1002 is not output from power management control ECU (Techstream display: PM1 Gateway) A
      U1002 is output from power management control ECU (Techstream display: PM1 Gateway) B

    Result: 

    B 

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC. Refer to  DTC U1002: Lost Communication with Gateway Module (Power Management1) [02/2014 - 11/2016]  

    Result: 

    A 

    See step  2

  2. CHECK FOR OPEN IN SUB BUS 11 LINES (CLEARANCE WARNING ECU ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the F87 clearance warning ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY431909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Clearance Warning ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      F87-17 (R1) - F87-18 (R2) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY431911Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Clearance Warning ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      F87-27 (E) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
    2. Reconnect the cable to the negative (-) auxiliary battery terminal.
    3. Measure the voltage according to the value(s) in the table below.
      GTY431898Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Clearance Warning ECU Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      F87-12 (IG) - Body ground Power switch on (IG) 11 to 14 V

    Result: 

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [02/2014 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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