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DTC U1177-87: Lost Communication with Side Obstacle Detection Control Module "A" (ch2) Missing Message; DTC U1178-87: Lost Communication with Side Obstacle Detection Control Module "B" (ch2) Missing Message [09/2022 - ]: Procedure

  1. CHECK FOR DTC 
    1. Using the GTS, check for parking support brake system DTCs.

      Body Electrical > Clearance Warning > Trouble Codes 

      Result

      Result Proceed to
      No DTCs are output A
      DTC U1177-87 only is output B
      DTC U1178-87 only is output C
      DTC U1177-87 and U1178-87 are output D

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

    Result: 

    C 

    See step  4

    Result: 

    D 

    See step  6

    Result: 

    B 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH (A) - BODY GROUND) 
    1. Disconnect the connector of the blind spot monitor sensor LH (A).
      GTY1122354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH (A))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R5-10 (BLGD) - Body ground Always Below 1 Ω

      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 (A) - POWER SOURCE) 
    1. Disconnect the blind spot monitor sensor LH (A) connector.
      GTY1122350Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH (A))
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      R5-5 (BLB) - Body ground Ignition switch ON 11 to 14 V
      R5-5 (BLB) - Body ground Ignition switch off Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH (A). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  4. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH (B) - BODY GROUND) 
    1. Disconnect the connector of the blind spot monitor sensor RH (B) connector.
      GTY1122355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor RH (B))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R4-10 (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 (B) - POWER SOURCE) 
    1. Disconnect the connector of the blind spot monitor sensor RH (B).
      GTY1122349Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor RH (B))
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      R4-5 (BRB) - Body ground Ignition Switch ON 11 to 14 V
      R4-5 (BRB) - Body ground Ignition switch off Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH (B). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. CHECK CAN BUS (CONFIRM PROBLEM SYMPTOMS) 
    1. Turn the ignition 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.
      GTY1125765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with wire harness connected
      (Clearance Warning ECU Assembly)
      *1 DLC3

      Standard Resistance

      Tester Connection Condition Specified Condition Problem Symptom if Specified Condition Not Met
      N41-37 (CANH) - N41-38 (CANL) Disconnect cable from negative (-) auxiliary battery terminal 54 to 69 Ω Below 54 Ω: Short in line
      70 Ω or higher: Open in main line
      N41-37 (CANH) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: Short to ground
      N41-38 (CANL) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: Short to ground
      N41-37 (CANH) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: Short to +B
      N41-38 (CANL) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: Short to +B

      Result

      Result Proceed to
      OK A
      NG (open in main line) B
      NG (short in line) C
      NG (short to +B or ground) D

    Result: 

    B 

    See step  9

    Result: 

    C 

    See step  13

    Result: 

    D 

    See step  17

    Result: 

    A 

    See step  7

  7. CLEAR DTCS 
    1. Using the GTS, clear the DTCs.

      Body Electrical > Clearance Warning > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Clearance Warning > Trouble Codes 

      Result

      Result Proceed to
      DTC U1177-87 and U1178-87 are output A
      DTC U1177-87 and U1178-87 are not output B

    Result: 

    A 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    B 

    GO TO PROBLEM SYMPTOM SIMULATION METHOD. Refer to  PROBLEM SYMPTOMS TABLE [09/2022 - ] 

  9. CHECK FOR OPEN IN CAN BUS WIRE (NO. 24 CAN JUNCTION CONNECTOR) 
    1. Disconnect the No. 24 CAN junction connector.
      GTY1123847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 24 CAN Junction Connector)      		 *b to Blind Spot Monitor Sensor RH (B) CAN Main Wire
      *c to Blind Spot Monitor Sensor LH (A) 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
      N100-2 (CANH) - N100-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-1 (CANH) - N100-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      N100-3 (CANH) - N100-14 (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 (B) CAN main wire) B
      NG (to blind spot monitor sensor LH (A) CAN main wire) C
      NG (to clearance warning ECU assembly CAN wire) D

    Result: 

    A 

    REPLACE NO. 24 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  11

    Result: 

    D 

    See step  12

    Result: 

    B 

    See step  10

  10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH (B)) 
    1. Reconnect the N100 No. 24 CAN junction connector.
      GTY1122352Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor RH (B))
    2. Disconnect the R4 blind spot monitor sensor RH (B) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R4-1 (CA2P) - R4-6 (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 (B). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH (B) - NO. 24 CAN JUNCTION CONNECTOR) 

  11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH (A)) 
    1. Reconnect the N100 No. 24 CAN junction connector.
      GTY1122353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH (A))
    2. Disconnect the R5 blind spot monitor sensor LH (A) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R5-1 (CA2P) - R5-6 (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 (A). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH (A) - NO. 24 CAN JUNCTION CONNECTOR) 

  12. CHECK FOR OPEN IN CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Reconnect the No. 24 CAN junction connector.
      GTY1125618Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Clearance Warning ECU Assembly)
    2. Disconnect the N41 clearance warning ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N41-37 (CANH) - N41-38 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - NO. 24 CAN JUNCTION CONNECTOR) 

  13. CHECK FOR SHORT IN CAN BUS WIRES (NO. 24 CAN JUNCTION CONNECTOR) 
    1. Disconnect the No. 24 CAN junction connector.
      GTY1123847Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 24 CAN Junction Connector)      		 *b to Blind Spot Monitor Sensor RH (B) CAN Main Wire
      *c to Blind Spot Monitor Sensor LH (A) 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
      N100-2 (CANH) - N100-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-1 (CANH) - N100-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      N100-3 (CANH) - N100-14 (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 (B) CAN main wire) B
      NG (to blind spot monitor sensor LH (A) CAN main wire) C
      NG (to clearance warning ECU assembly CAN wire) D

    Result: 

    A 

    REPLACE NO. 24 CAN JUNCTION CONNECTOR 

    Result: 

    C 

    See step  15

    Result: 

    D 

    See step  16

    Result: 

    B 

    See step  14

  14. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH (B)) 
    1. Reconnect the N100 No. 24 CAN junction connector.
      GTY1122351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor RH (B))
    2. Disconnect the R4 blind spot monitor sensor RH (B) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R4-1 (CA2P) - R4-6 (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 (B). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH (B) - NO. 24 CAN JUNCTION CONNECTOR) 

  15. CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH (A)) 
    1. Reconnect the N100 No. 24 CAN junction connector.
      GTY1128342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH (A))
    2. Disconnect the R5 blind spot monitor sensor LH (A) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R5-1 (CA2P) - R5-6 (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 (A). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH (A) - NO. 24 CAN JUNCTION CONNECTOR) 

  16. CHECK FOR SHORT IN CAN BUS WIRES (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Reconnect the No. 24 CAN junction connector.
      GTY1125617Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Clearance Warning ECU Assembly)
    2. Disconnect the N41 clearance warning ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N41-37 (CANH) - N41-38 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS WIRE (CLEARANCE WARNING ECU ASSEMBLY - NO. 24 CAN JUNCTION CONNECTOR) 

  17. CHECK FOR SHORT IN CAN BUS (BLIND SPOT MONITOR SENSOR RH (B) CONNECTION MAIN LINE) 
    1. Disconnect the No. 24 CAN junction connector.
      GTY1123208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 24 CAN Junction Connector)      		 *1 DLC3
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N100-2 (CANH) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-13 (CANL) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-2 (CANH) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher
      N100-13 (CANL) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher

      HINT: 

      Check for short that was confirmed to be a malfunction by confirming symptoms.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  22

    Result: 

    OK 

    See step  18

  18. CHECK FOR SHORT IN CAN BUS (BLIND SPOT MONITOR SENSOR LH (A) CONNECTION MAIN LINE) 
    1. Disconnect the No. 24 CAN junction connector.
      GTY1134660Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 24 CAN Junction Connector)      		 *1 DLC3
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N100-3 (CANH) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-14 (CANL) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-3 (CANH) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher
      N100-14 (CANL) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher

      HINT: 

      Check for short that was confirmed to be a malfunction by confirming symptoms.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  21

    Result: 

    OK 

    See step  19

  19. CHECK FOR SHORT IN CAN BUS (CLEARANCE WARNING ECU ASSEMBLY CONNECTION BRANCH LINE) 
    1. Reconnect the No. 24 CAN junction connector.
      GTY1134540Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to No. 24 CAN Junction Connector)      		 *1 DLC3
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N100-1 (CANH) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-12 (CANL) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N100-1 (CANH) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher
      N100-12 (CANL) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher

      HINT: 

      Check for short that was confirmed to be a malfunction by confirming symptoms.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE NO. 24 CAN JUNCTION CONNECTOR 

    Result: 

    NG 

    See step  20

  20. CHECK FOR SHORT IN CAN BUS (CLEARANCE WARNING ECU ASSEMBLY) 
    1. Reconnect the N100 No. 24 CAN junction connector.
      GTY1122663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Clearance Warning ECU Assembly)
      *1 DLC3
    2. Disconnect the connector of the clearance warning ECU assembly.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      N41-37 (CANH) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N41-38 (CANL) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      N41-37 (CANH) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher
      N41-38 (CANL) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS BRANCH LINE OR CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 24 CAN JUNCTION CONNECTOR) 

  21. CHECK FOR SHORT IN CAN BUS (BLIND SPOT MONITOR SENSOR LH (A)) 
    1. Reconnect the N100 No. 24 CAN junction connector.
      GTY1123918Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH (A))
      *1 DLC3
    2. Disconnect the R5 blind spot monitor sensor LH (A) connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R5-1 (CA2P) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      R5-6 (CA2N) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      R5-1 (CA2P) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher
      R5-6 (CA2N) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH (A). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH (A) - NO. 24 CAN JUNCTION CONNECTOR) 

  22. CHECK FOR SHORT IN CAN BUS (BLIND SPOT MONITOR SENSOR RH (B)) 
    1. Reconnect the N100 No. 24 CAN junction connector.
      GTY1123919Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor RH (B))
      *1 DLC3
    2. Disconnect the connector of the blind spot monitor sensor RH (B).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R4-1 (CA2P) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      R4-6 (CA2N) - Body ground Disconnect cable from negative (-) auxiliary battery terminal 200 Ω or higher
      R4-1 (CA2P) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher
      R4-6 (CA2N) - G57-16 (BAT) Disconnect cable from negative (-) auxiliary battery terminal 6 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR RH (B). Refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH (B) - NO. 24 CAN JUNCTION CONNECTOR) 

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