PARKING SUPPORT BRAKE SYSTEM, Diagnostic DTC:U0232, U0233

DTC Code DTC Name
U0232 Lost Communication with Blind Spot Monitor Slave Module
U0233 Lost Communication with Blind Spot Monitor Master Module

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0232 Lost Communication with Blind Spot Monitor Slave Module The clearance warning ECU assembly cannot receive signals from the blind spot monitor sensor (slave)

  • Open or short in CAN bus main wire or connector

  • Open or short in CAN bus wire or connector

  • Open or short in No. 20 CAN junction connector

  • Clearance warning ECU assembly

  • Blind spot monitor sensor RH

  • Power source circuit of blind spot monitor sensor RH

  • Blind spot monitor sensor RH ground circuit

  • Blind spot monitor sensor LH
U0233 Lost Communication with Blind Spot Monitor Master Module The clearance warning ECU assembly cannot receive signals from the blind spot monitor sensor (master)

  • Open or short in CAN bus main wire or connector

  • Open or short in CAN bus wire or connector

  • Open or short in No. 20 CAN junction connector

  • Clearance warning ECU assembly

  • Blind spot monitor sensor LH

  • Power source circuit of blind spot monitor sensor LH

  • Blind spot monitor sensor LH ground circuit

  • Blind spot monitor sensor RH

WIRING DIAGRAM

B006A2GE01

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

Tech Tips


  • Operating the engine switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE


  1. CHECK DTC


    1. Check for DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > 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

    B

    CHECK CAN BUS MAIN WIRE Click here

    C

    CHECK CAN BUS MAIN WIRE Click here

    A

  2. CHECK CAN BUS MAIN WIRE


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the L57 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
      L57-1 (CA2P) -L57-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 20 CAN JUNCTION CONNECTOR)

    OK

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


    1. Disconnect the L57 blind spot monitor sensor LH connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L57-10 (BRGD) - Body ground Always Below 1 Ω

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      L57-5 (BLB) - Body ground Engine switch on (IG) 10.5 to 16 V
      L57-5 (BLB) - Body ground Engine switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. CHECK CAN BUS MAIN WIRE


    1. Disconnect the cable from the negative (-) battery terminal.

    2. Disconnect the L56 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
      L56-1 (CA2P) -L56-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 20 CAN JUNCTION CONNECTOR)

    OK

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


    1. Disconnect the L56 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
      L56-10 (BRGD) - Body ground Always Below 1 Ω

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      L56-5 (BRB) - Body ground engine switch on (IG) 10.5 to 16 V
      L56-5 (BRB) - Body ground engine switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK CAN BUS MAIN WIRE


    1. Turn the engine switch off.

    2. Disconnect the cable from the negative (-) battery terminal.

    3. B006GYZC07
      *1 DLC3
      *a

      Component with harness connected

      (No. 20 CAN Junction Connector)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      L124-1 (CANH) -L124-12 (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
      L124-1(CANH) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      L124-12(CANL) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      L124-1(CANH) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      L124-12(CANL) - G20-16 (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

    B

    CHECK FOR OPEN IN CAN BUS WIRE (NO. 20 CAN JUNCTION CONNECTOR) Click here

    C

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 20 CAN JUNCTION CONNECTOR) Click here

    D

    CHECK FOR SHORT IN CAN BUS WIRES (NO. 20 CAN JUNCTION CONNECTOR) Click here

    A

  7. CONFIRM CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the L18 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
      L18-37(CANH) - L18-38(CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - NO. 20 CAN JUNCTION CONNECTOR)

    OK

  8. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC U0232 and U0233 are output A
      DTC U0232 and U0233 are not output B

    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

  9. CHECK FOR OPEN IN CAN BUS WIRE (NO. 20 CAN JUNCTION CONNECTOR)


    1. Disconnect the L124 No. 20 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L124-3 (CANH) - L124-14(CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      L124-1 (CANH) - L124-12(CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      L124-2 (CANH) - L124-13 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω 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
      NG (to clearance warning ECU assembly CAN wire) D

    A

    REPLACE NO. 20 CAN JUNCTION CONNECTOR

    C

    CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH) Click here

    D

    CHECK FOR OPEN IN CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY) Click here

    B

  10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L57 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
      L57-1 (CA2P) - L57-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 20 CAN JUNCTION CONNECTOR)

  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L56 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
      L56-1 (CA2P) -L56-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 20 CAN JUNCTION CONNECTOR)

  12. CHECK FOR OPEN IN CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L18 clearance warning ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L18-37(CANH) - L18-38(CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - NO. 20 CAN JUNCTION CONNECTOR)

  13. CHECK FOR SHORT IN CAN BUS WIRES (NO. 20 CAN JUNCTION CONNECTOR)


    1. Disconnect the L124 No. 20 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L124-3 (CANH) - L124-14(CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      L124-1 (CANH) - L124-12(CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      L124-2 (CANH) - L124-13(CANL) Cable disconnected from negative (-) battery terminal 200 Ω 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
      NG (to clearance warning ECU assembly CAN wire) D

    A

    REPLACE NO. 20 CAN JUNCTION CONNECTOR

    C

    CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) Click here

    D

    CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY) Click here

    B

  14. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L57 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
      L57-1 (CA2P) - L57-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 20 CAN JUNCTION CONNECTOR)

  15. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L56 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
      L56-1 (CA2P) -L56-6 (CA2N) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 20 CAN JUNCTION CONNECTOR)

  16. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L18 clearance warning ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L18-37(CANH) - L18-38(CANL) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - NO. 20 CAN JUNCTION CONNECTOR)

  17. CHECK FOR SHORT IN CAN BUS WIRES (NO. 20 CAN JUNCTION CONNECTOR)


    1. Disconnect the L124 No. 20 CAN junction connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L124-3 (CANH) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L124-14 (CANL) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L124-3 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L124-14 (CANL) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L124-1 (CANH) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L124-12 (CANL) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L124-1 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L124-12 (CANL) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L124-2 (CANH) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L124-13 (CANL) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L124-2 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L124-13 (CANL) - G20-16 (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
      NG (to clearance warning ECU assembly CAN wire) D

    A

    REPLACE NO. 20 CAN JUNCTION CONNECTOR

    C

    CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) Click here

    D

    CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY) Click here

    B

  18. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L57 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
      L57-1 (CA2P) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L57-6 (CA2N) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L57-1 (CA2P) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L57-6 (CA2N) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 20 CAN JUNCTION CONNECTOR)

  19. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L56 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
      L56-1 (CA2P) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L56-6 (CA2N) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L56-1 (CA2P) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L56-6 (CA2N) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here

    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 20 CAN JUNCTION CONNECTOR)

  20. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY)


    1. Reconnect the L124 No. 20 CAN junction connector.

    2. Disconnect the L18 clearance warning ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L18-37 (CANH) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L18-38 (CANL) - G20-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher
      L18-37 (CANH) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      L18-38 (CANL) - G20-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - NO. 20 CAN JUNCTION CONNECTOR)