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Home >> Toyota >> 2020 >> Avalon Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 85 (Blind Spot Monitor System - Diagnostic Codes & Symptom Tests (Hybrid)) >> BLIND SPOT MONITOR SYSTEM (for HV Model) >> DTC U0232: Lost Communication with Blind Spot Monitor Slave Module [04/2018 -] >> Procedure

DTC U0232: Lost Communication with Blind Spot Monitor Slave Module [04/2018 -]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CAN BUS MAIN WIRE 
    1. Turn the power switch off.
    2. Disconnect the cable from the negative (-) auxiliary battery terminal.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      P5-1 (CA2P) - P5-6 (CA2N) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or more: Open circuit in main bus lines
      P5-1 (CA2P) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CA2P short to ground
      P5-6 (CA2N) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CA2N short to ground
      P5-1 (CA2P) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CA2P +B short
      P5-6 (CA2N) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CA2N +B short
      GTY914060Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3
      *a Component with harness connected
      (Blind Spot Monitor Sensor RH)
    4. Reconnect the cable to the negative (-) auxiliary battery terminal.

      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  5

    Result: 

    C 

    See step  8

    Result: 

    D 

    See step  11

    Result: 

    A 

    See step  2

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

    Refer to Power Source Circuit [04/2018 -] 

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

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

    Refer to Power Source Circuit [04/2018 -] 

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK DTC 
    1. Turn the power switch off.
    2. Turn the power switch on (IG).
    3. Check for DTCs.

      Body Electrical > Blind Spot Monitor Master > Trouble Codes 

      OK

      No DTCs are output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    SYMPTOM SIMULATION. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 -] 

    Result: 

    NG 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [04/2018 -] 

  5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 26 JUNCTION CONNECTOR) 
    1. Disconnect the K68 No. 26 junction connector.
      GTY870569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 26 Junction Connector)
      *b to Blind Spot Monitor Sensor RH CAN main wire
      *c to Blind Spot Monitor Sensor LH CAN main wire
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K68-3 (CANH) - K68-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      K68-2 (CANH) - K68-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      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

    Result: 

    A 

    REPLACE NO. 26 JUNCTION CONNECTOR 

    Result: 

    C 

    See step  7

    Result: 

    B 

    See step  6

  6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the K68 No. 26 junction connector.
    2. Disconnect the P5 blind spot monitor sensor RH connector.
      GTY909900Courtesy 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
      P5-1 (CA2P) - P5-6 (CA2N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [04/2018 -] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 26 JUNCTION CONNECTOR) 

  7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the K68 No. 26 junction connector.
    2. Disconnect the P6 blind spot monitor sensor LH connector.
      GTY941991Courtesy 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
      P6-1 (CA2P) - P6-6 (CA2N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [04/2018 -] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 26 JUNCTION CONNECTOR) 

  8. CHECK FOR SHORT IN CAN BUS WIRES (NO. 26 JUNCTION CONNECTOR) 
    1. Disconnect the K68 No. 26 junction connector.
      GTY870568Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 26 Junction Connector)
      *b to Blind Spot Monitor Sensor RH CAN main wire
      *c to Blind Spot Monitor Sensor LH CAN main wire
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      K68-3 (CANH) - K68-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      K68-2 (CANH) - K68-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      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

    Result: 

    A 

    REPLACE NO. 26 JUNCTION CONNECTOR 

    Result: 

    C 

    See step  10

    Result: 

    B 

    See step  9

  9. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the K68 No. 26 junction connector.
    2. Disconnect the P5 blind spot monitor sensor RH connector.
      GTY909896Courtesy 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
      P5-1 (CA2P) - P5-6 (CA2N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [04/2018 -] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 26 JUNCTION CONNECTOR) 

  10. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the K68 No. 26 junction connector.
    2. Disconnect the P6 blind spot monitor sensor LH connector.
      GTY909895Courtesy 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
      P6-1 (CA2P) - P6-6 (CA2N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH. Refer to  REMOVAL [04/2018 -] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 26 JUNCTION CONNECTOR) 

  11. CHECK FOR SHORT IN CAN BUS WIRES (No. 26 JUNCTION CONNECTOR) 
    1. Disconnect the K68 No. 26 junction connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY840155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 DLC3 - -
      *a Front view of wire harness connector
      (to No. 26 Junction Connector)      		 *b to Blind Spot Monitor Sensor RH CAN main wire
      *c to Blind Spot Monitor Sensor LH CAN main wire - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      K68-3 (CANH) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      K68-14 (CANL) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      K68-3 (CANH) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      K68-14 (CANL) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      K68-2 (CANH) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      K68-13 (CANL) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      K68-2 (CANH) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      K68-13 (CANL) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary 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

    Result: 

    A 

    REPLACE No. 26 JUNCTION CONNECTOR 

    Result: 

    C 

    See step  13

    Result: 

    B 

    See step  12

  12. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) 
    1. Reconnect the K68 No. 26 junction connector.
    2. Disconnect the P5 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
      P5-1 (CA2P) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      P5-6 (CA2N) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      P5-1 (CA2P) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      P5-6 (CA2N) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      GTY861067Courtesy 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 [04/2018 -] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 26 JUNCTION CONNECTOR) 

  13. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) 
    1. Reconnect the K68 No. 26 junction connector.
    2. Disconnect the P6 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
      P6-1 (CA2P) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      P6-6 (CA2N) - G45-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      P6-1 (CA2P) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      P6-6 (CA2N) - G45-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher
      GTY861068Courtesy 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 [04/2018 -] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 26 JUNCTION CONNECTOR) 

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