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Home >> Toyota >> 2018 >> Camry LE >> Repair and Diagnosis >> Accessories & Equipment >> Collision/Avoidance >> Intelligent Clearance Sonar System - Diagnostic Codes (Except Hybrid) >> Intelligent Clearance Sonar System >> DTC U0232: Lost Communication with Blind Spot Monitor Slave Module; DTC U0233: Lost Communication with Blind Spot Monitor Master Module [06/2017 - 10/2020] >> Procedure

DTC U0232: Lost Communication with Blind Spot Monitor Slave Module; DTC U0233: Lost Communication with Blind Spot Monitor Master Module [06/2017 - 10/2020]: Procedure

  1. CHECK DTC 
    1. Check for DTCs.

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

      Result

      Result Proceed to
      DTC U0232 is only output A
      DTC U0233 is only output B
      DTC U0232 and U0233 are output C

    Result: 

    B 

    See step  5

    Result: 

    C 

    See step  8

    Result: 

    A 

    See step  2

  2. CHECK CAN BUS MAIN WIRE 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the W6 blind spot monitor sensor LH connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY742239Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to blind spot monitor sensor LH)

      Standard Resistance

      Tester Connection Condition Specified Condition
      W6-1 (CA2P) -W6-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 5 JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BODY GROUND) 

    Refer to Power Source Circuit [06/2017 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 5 JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH POWER SOURCE) 

    Refer to Power Source Circuit [06/2017 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. CHECK CAN BUS MAIN WIRE 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the W5 blind spot monitor sensor RH connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY768929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to blind spot monitor sensor RH)

      Standard Resistance

      Tester Connection Condition Specified Condition
      W5-1 (CA2P) -W5-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 5 JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BODY GROUND) 

    Refer to Power Source Circuit [06/2017 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 5 JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH POWER SOURCE) 

    Refer to Power Source Circuit [06/2017 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  8. CHECK CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH) 
    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.
      GTY748584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3
      *a Component with harness connected
      (No. 5 Junction Connector)

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      R100-1 (CANH) -R100-12 (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
      R100-1 (CANH) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      R100-12 (CANL) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      R100-1 (CANH) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      R100-12 (CANL) - K68-16 (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  11

    Result: 

    C 

    See step  15

    Result: 

    D 

    See step  19

    Result: 

    A 

    See step  9

  9. CONFIRM CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Disconnect the R39 clearance warning ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R39-37 (CANH) - R39-38 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      GTY742681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to clearance warning ECU assembly)

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - No. 5 JUNCTION CONNECTOR) 

    Result: 

    OK 

    See step  10

  10. CHECK DTC 
    1. Clear the DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    2. Check for DTCs.

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

      Result

      Result Proceed to
      DTC U0232 and U0233 are output A
      DTC U0232 and U0233 are not output B

    Result: 

    A 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [06/2017 - 10/2020] 

    Result: 

    B 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2017 - 08/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2018 - 09/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 03/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2020 - 10/2020] 

  11. CHECK FOR OPEN IN CAN BUS WIRE (No. 5 JUNCTION CONNECTOR) 
    1. Disconnect the R100 No. 5 junction connector.
      GTY750040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 5 Junction Connector)
      *b to blind spot monitor sensor RH CAN main wire
      *c to blind spot monitor sensor LH CAN main wire
      *d to clearance warning ECU assembly CAN wire
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R100-3 (CANH) - R100-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      R100-2 (CANH) - R100-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      R100-1 (CANH) - R100-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Result Proceed to
      OK A
      NG (to blind spot monitor sensor RH CAN main wire) B
      NG (to blind spot monitor sensor LH CAN main wire) C
      NG (to clearance warning ECU assembly CAN wire) D

    Result: 

    A 

    REPLACE No. 5 JUNCTION CONNECTOR 

    Result: 

    C 

    See step  13

    Result: 

    D 

    See step  14

    Result: 

    B 

    See step  12

  12. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the W5 blind spot monitor sensor RH connector.
      GTY768929Courtesy 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
      W5-1 (CA2P) - W5-6 (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 [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 5 JUNCTION CONNECTOR) 

  13. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the W6 blind spot monitor sensor LH connector.
      GTY742239Courtesy 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
      W6-1 (CA2P) -W6-6 (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 [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 5 JUNCTION CONNECTOR) 

  14. CHECK FOR OPEN IN CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the R39 clearance warning ECU assembly connector.
      GTY742681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to clearance warning ECU assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R39-37 (CANH) - R39-38 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - No. 5 JUNCTION CONNECTOR) 

  15. CHECK FOR SHORT IN CAN BUS WIRES (No. 5 JUNCTION CONNECTOR) 
    1. Disconnect the R100 No. 5 junction connector.
      GTY750040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 5 Junction Connector)
      *b to blind spot monitor sensor RH CAN main wire
      *c to blind spot monitor sensor LH CAN main wire
      *d to clearance warning ECU assembly CAN wire
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R100-3 (CANH) - R100-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      R100-2 (CANH) - R100-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      R100-1 (CANH) - R100-12 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher

      Result

      Result Proceed to
      OK A
      NG (to blind spot monitor sensor RH CAN main wire) B
      NG (to blind spot monitor sensor LH CAN main wire) C
      NG (to clearance warning ECU assembly CAN wire) D

    Result: 

    A 

    REPLACE No. 5 JUNCTION CONNECTOR 

    Result: 

    C 

    See step  17

    Result: 

    D 

    See step  18

    Result: 

    B 

    See step  16

  16. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the W5 blind spot monitor sensor RH connector.
      GTY768929Courtesy 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
      W5-1 (CA2P) - W5-6 (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 [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 5 JUNCTION CONNECTOR) 

  17. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the W6 blind spot monitor sensor LH connector.
      GTY742239Courtesy 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
      W6-1 (CA2P) -W6-6 (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 [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 5 JUNCTION CONNECTOR) 

  18. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the R39 clearance warning ECU assembly connector.
      GTY742681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to clearance warning ECU assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R39-37 (CANH) - R39-38 (CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - No. 5 JUNCTION CONNECTOR) 

  19. CHECK FOR SHORT IN CAN BUS WIRES (No. 5 JUNCTION CONNECTOR) 
    1. Disconnect the R100 No. 5 junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY761445Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 5 Junction Connector)      		 *b to blind spot monitor sensor RH CAN main wire
      *c to blind spot monitor sensor LH CAN main wire *d to clearance warning ECU assembly CAN wire

      Standard Resistance

      Tester Connection Condition Specified Condition
      R100-3 (CANH) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R100-14 (CANL) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R100-3 (CANH) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      R100-14 (CANL) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      R100-1 (CANH) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R100-12 (CANL) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R100-1 (CANH) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      R100-12 (CANL) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      R100-2 (CANH) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R100-13 (CANL) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R100-2 (CANH) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      R100-13 (CANL) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Result Proceed to
      OK A
      NG (to blind spot monitor sensor RH CAN main wire) B
      NG (to blind spot monitor sensor LH CAN main wire) C
      NG (to clearance warning ECU assembly CAN wire) D

    Result: 

    A 

    REPLACE No. 5 JUNCTION CONNECTOR 

    Result: 

    C 

    See step  21

    Result: 

    D 

    See step  22

    Result: 

    B 

    See step  20

  20. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the W5 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
      W5-1 (CA2P) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      W5-6 (CA2N) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      W5-1 (CA2P) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      W5-6 (CA2N) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      GTY746817Courtesy 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 [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 5 JUNCTION CONNECTOR) 

  21. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the W6 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
      W6-1 (CA2P) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      W6-6 (CA2N) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      W6-1 (CA2P) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      W6-6 (CA2N) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      GTY746818Courtesy 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 [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 5 JUNCTION CONNECTOR) 

  22. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Reconnect the R100 No. 5 junction connector.
    2. Disconnect the R39 clearance warning ECU assembly connector.
      GTY763594Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3
      *a Front view of wire harness connector
      (to clearance warning ECU assembly)
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R39-37 (CANH) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R39-38 (CANL) - K68-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      R39-37 (CANH) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      R39-38 (CANL) - K68-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [06/2017 - 10/2020] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - No. 5 JUNCTION CONNECTOR) 

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