BLIND SPOT MONITOR SYSTEM, Diagnostic DTC:U0232

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

DESCRIPTION

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

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

  • Open or short in CAN bus main wire or connector

  • 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

 -

WIRING DIAGRAM

B002HHWE33

CAUTION / NOTICE / HINT

Note


  • When checking for DTCs, make sure that the blind spot monitor main switch (multi-function switch) is on.

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

  • Before measuring the resistance of the CAN bus, turn the power 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 (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

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

    Click here

Tech Tips


  • Operating the power 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 HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH - AUXILIARY BATTERY AND BODY GROUND)


    1. B002KLOC27
      *a

      Front view of wire harness connector

      (to Blind Spot Monitor Sensor RH)

      Disconnect the 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
      X1-10 (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
      X1-5 (BRB) - Body ground Power switch on (IG) 11 to 14 V
      X1-5 (BRB) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE CAN LINE OR CONNECTOR

    OK

  2. CHECK FOR OPEN OR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)


    1. B002JCLC39
      *a

      Front view of wire harness connector

      (to blind spot monitor sensor LH)
      *b DLC3

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

    2. Disconnect the 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
      V1-1 (CA2P) - V1-6 (CA2N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      V1-1 (CA2P) - I7-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      V1-6 (CA2N) - I7-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      V1-1 (CA2P) - I7-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      V1-6 (CA2N) - I7-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

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


    1. B002JCLC40
      *a

      Front view of wire harness connector

      (to blind spot monitor sensor RH)
      *b DLC3

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

    2. Disconnect the 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
      X1-1 (CA2P) - X1-6 (CA2N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      X1-1 (CA2P) - I7-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      X1-6 (CA2N) - I7-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      X1-1 (CA2P) - I7-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      X1-6 (CA2N) - I7-16 (BAT) Cable disconnected from negative (-) auxiliary 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 LINE OR CONNECTOR