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DTC U0232: Lost Communication with Blind Spot Monitor Slave Module [08/2016 - 08/2019]: Procedure

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

      Result

      Result Proceed to
      w/ Intelligent Clearance Sonar System A
      w/o Intelligent Clearance Sonar System B

    Result: 

    B 

    See step  3

    Result: 

    A 

    See step  2

  2. CHECK DTC OUTPUT (INTELLIGENT CLEARANCE SONAR SYSTEM) 
    1. Using the GTS, check for DTCs according to the prompts on the screen.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      Standard

      The clearance warning ECU assembly does not output DTCs U0232 and U0233 simultaneously.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO INTELLIGENT CLEARANCE SONAR SYSTEM (DTC U0232). Refer to  DTC U0232: Lost Communication with Blind Spot Monitor Slave Module; DTC U0233: Lost Communication with Blind Spot Monitor Master Module [08/2016 - 08/2019] 

    Result: 

    OK 

    See step  3

  3. CHECK CAN BUS MAIN WIRE 
    1. Turn the engine switch off.
    2. Disconnect the cable from the negative (-) battery terminal.
    3. Measure the resistance according to the value (s) in the table below.
      GTY651436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3
      *a Component with harness connected
      (No. 6 CAN Junction Connector)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      J98-1 (CANH) -J98-12 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or more: Open circuit in main bus lines
      J98-1 (CANH) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      J98-12 (CANL) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      J98-1 (CANH) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      J98-12 (CANL) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Result

      Result Proceed to
      OK A
      Open circuit in CAN main bus lines B
      Short circuit between bus lines C
      • Short to ground
      • +B short
      		 D

    Result: 

    B 

    See step  9

    Result: 

    C 

    See step  12

    Result: 

    D 

    See step  15

    Result: 

    A 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BODY GROUND) 
    1. Disconnect the W 2 blind spot monitor sensor RH connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W2-10 (BRGD) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH POWER SOURCE) 
    1. Disconnect the W 2 blind spot monitor sensor RH connector.
    2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      W2-5 (BRB) - Body ground Engine switch on (IG) 11 to 14 V
      W2-5 (BRB) - Body ground Engine switch off Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK DTC 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Turn the engine switch off.
    3. Turn the engine switch on (IG).
    4. Check for DTCs.

      Refer to DTC CHECK / CLEAR [09/2015 - ]

      Body Electrical > Blind Spot Monitor Master > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 12/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 08/2019] 

    Result: 

    NG 

    See step  7

  7. REPLACE BLIND SPOT MONITOR SENSOR RH 
    1. Replace the blind spot monitor sensor RH.

      Refer to REMOVAL [08/2016 - 12/2017] , or refer to REMOVAL [12/2017 - 08/2019]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. RECHECK DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2015 - ]

      Body Electrical > Blind Spot Monitor Master > Clear DTCs 

    2. Recheck for DTCs and check if the same DTC is output again.

      Body Electrical > Blind Spot Monitor Master > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019] 

  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 6 CAN JUNCTION CONNECTOR) 
    1. Disconnect the J98 No. 6 CAN junction connector.
      GTY657478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 6 CAN Junction Connector)
      *b to blind spot monitor sensor LH CAN main wire
      *c to blind spot monitor sensor RH CAN main wire
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J98-3 (CANH) - J98-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      J98-1 (CANH) - J98-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result Proceed to
      OK A
      NG (to blind spot monitor sensor LH CAN main wire) B
      NG (to blind spot monitor sensor RH CAN main wire) C

    Result: 

    A 

    REPLACE NO. 6 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  11

    Result: 

    B 

    See step  10

  10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the J98 No. 6 CAN junction connector.
    2. Disconnect the X 2 blind spot monitor sensor LH connector.
      GTY682353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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
      X2-1 (CA2P) - X2-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 6 CAN JUNCTION CONNECTOR) 

  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the J98 No. 6 CAN junction connector.
    2. Disconnect the W 2 blind spot monitor sensor RH connector.
      GTY657237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to blind spot monitor sensor RH)
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W2-1 (CA2P) -W2-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 6 CAN JUNCTION CONNECTOR) 

  12. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR) 
    1. Disconnect the J98 No. 6 CAN junction connector.
      GTY657478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 6 CAN Junction Connector)
      *b to blind spot monitor sensor LH CAN main wire
      *c to blind spot monitor sensor RH CAN main wire
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J98-3 (CANH) - J98-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      J98-1 (CANH) - J98-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Result Proceed to
      OK A
      NG (to blind spot monitor sensor LH CAN main wire) B
      NG (to blind spot monitor sensor RH CAN main wire) C

    Result: 

    A 

    REPLACE NO. 6 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  14

    Result: 

    B 

    See step  13

  13. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the J98 No. 6 CAN junction connector.
    2. Disconnect the X 2 blind spot monitor sensor LH connector.
      GTY682353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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
      X2-1 (CA2P) - X2-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 6 CAN JUNCTION CONNECTOR) 

  14. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the J98 No. 6 CAN junction connector.
    2. Disconnect the W 2 blind spot monitor sensor RH connector.
      GTY657237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to blind spot monitor sensor RH)
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W2-1 (CA2P) -W2-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 6 CAN JUNCTION CONNECTOR) 

  15. CHECK FOR SHORT IN CAN BUS WIRES (NO. 6 CAN JUNCTION CONNECTOR) 
    1. Disconnect the J98 No. 6 CAN junction connector.
    2. Measure the resistance according to the value (s) in the table below.
      GTY655689Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 6 CAN Junction Connector)      		 *b to blind spot monitor sensor LH CAN main wire
      *c to blind spot monitor sensor RH CAN main wire - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      J98-3 (CANH) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      J98-14 (CANL) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      J98-3 (CANH) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      J98-14 (CANL) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      J98-1 (CANH) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      J98-12 (CANL) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      J98-1 (CANH) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      J98-12 (CANL) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Result Proceed to
      OK A
      NG (to blind spot monitor sensor LH CAN main wire) B
      NG (to blind spot monitor sensor RH CAN main wire) C

    Result: 

    A 

    REPLACE NO. 6 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  17

    Result: 

    B 

    See step  16

  16. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the J98 No. 6 CAN junction connector.
    2. Disconnect the X 2 blind spot monitor sensor LH connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      X2-1 (CA2P) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      X2-6 (CA2N) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      X2-1 (CA2P) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      X2-6 (CA2N) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      GTY679255Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3
      *a Front view of wire harness connector
      (to blind spot monitor sensor LH)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 6 CAN JUNCTION CONNECTOR) 

  17. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the J98 No. 6 CAN junction connector.
    2. Disconnect the W 2 blind spot monitor sensor RH connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      W2-1 (CA2P) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      W2-6 (CA2N) - J12-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      W2-1 (CA2P) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      W2-6 (CA2N) - J12-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      GTY643151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3
      *a Front view of wire harness connector
      (to blind spot monitor sensor RH)

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [08/2016 - 12/2017]  , or refer to  REMOVAL [12/2017 - 08/2019] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 6 CAN JUNCTION CONNECTOR) 

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