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DTC U1002: Lost Communication with Gateway Module (Parking Assist Bus) [09/2015 - ]: Procedure

  1. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Refer to PRECAUTION [09/2015 - ] ).

    Result:  NEXT

    NEXT 

    See step  2

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
      WARNING:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

    Result:  NEXT

    NEXT 

    See step  3

  3. CHECK CAN BUS WIRE (CAN MAIN WIRE FOR DISCONNECTION, BUS LINE FOR SHORT CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY637683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition Resistance: Malfunction
      R91-3 (CANH) - R91-2 (CANL) Engine switch off 54 to 69 Ω Below 53 Ω: Short in line
      R91-3 (CANH) - R91-2 (CANL) Engine switch off 54 to 69 Ω Higher than 70 Ω: Open in CAN main bus line
      R91-3 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short
      R91-2 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher Below 6 kΩ: +B short
      R91-3 (CANH) - R91-1 (GND) Engine switch off 200 Ω or higher Below 200 Ω: Ground short
      R91-2 (CANL) - R91-1 (GND) Engine switch off 200 Ω or higher Below 200 Ω: Ground short
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (No. 15 Junction Connector)
      *b Front view of DLC3
      RESULT

      Result Proceed to
      NG
      • Open in CAN main wire
      		 A
      NG
      • Short in line
      • +B short
      • Ground short
      		 B
      OK C

    Result:  B

    B 

    See step  13

    Result:  C

    C 

    See step  34

    Result:  A

    A 

    See step  4

  4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 13 JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY) 
    1. Disconnect the No. 13 junction connector.
      GTY638146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L96-9 (CANH) - L96-20 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 13 Junction Connector)

    Result:  NG

    NG 

    See step  6

    Result:  OK

    OK 

    See step  5

  5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 13 JUNCTION CONNECTOR - NO. 14 JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY633655Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L96-11 (CANH) - L96-22 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 13 Junction Connector)

    Result:  OK

    OK 

    REPLACE NO. 13 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    See step  8

  6. CONNECT CONNECTOR 
    1. Reconnect the L96 No. 13 junction connector.

    Result:  NEXT

    NEXT 

    See step  7

  7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 13 JUNCTION CONNECTOR) 
    1. Disconnect the millimeter wave radar sensor assembly connector.
      GTY653872Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      B9-4 (CA1P) - B9-3 (CA1N) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Millimeter Wave Radar Sensor Assembly)

    Result:  OK

    OK 

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MILLIMETER WAVE RADAR SENSOR (MILLIMETER WAVE RADAR SENSOR - NO. 13 JUNCTION CONNECTOR) 

  8. CONNECT CONNECTOR 
    1. Reconnect the L96 No. 13 junction connector.

    Result:  NEXT

    NEXT 

    See step  9

  9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 14 JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR) 
    1. Disconnect the No. 14 junction connector.
      GTY614796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R90-5 (CANH) - R90-16 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 14 Junction Connector)

    Result:  NG

    NG 

    See step  11

    Result:  OK

    OK 

    See step  10

  10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 14 JUNCTION CONNECTOR - NO. 13 JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY636390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R90-3 (CANH) - R90-14 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 14 Junction Connector)

    Result:  OK

    OK 

    REPLACE NO. 14 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 14 JUNCTION CONNECTOR - NO. 13 JUNCTION CONNECTOR) 

  11. CONNECT CONNECTOR 
    1. Reconnect the R90 No. 14 junction connector.

    Result:  NEXT

    NEXT 

    See step  12

  12. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 15 JUNCTION CONNECTOR - NO. 14 JUNCTION CONNECTOR) 
    1. Disconnect the No. 15 junction connector.
      GTY620281Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R91-3 (CANH) - L96-2 (CANL) Engine switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 15 Junction Connector)

    Result:  OK

    OK 

    REPLACE NO. 15 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 14 JUNCTION CONNECTOR) 

  13. CHECK FOR SHORT IN CAN BUS WIRES (NO. 13 JUNCTION CONNECTOR SIDE) 
    1. Disconnect the L96 No. 13 junction connector.
      GTY637683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R91-3 (CANH) - R91-2 (CANL) Engine switch off 108 to 132 Ω
      R91-3 (CANH) - R91-1 (GND) Engine switch off 200 Ω or higher
      R91-2 (CANL) - R91-1 (GND) Engine switch off 200 Ω or higher
      R91-3 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      R91-2 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (No. 15 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  23

    Result:  OK

    OK 

    See step  14

  14. CHECK FOR SHORT IN CAN BUS WIRES (NO. 13 JUNCTION CONNECTOR - DRIVING SUPPORT ECU ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY662923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L96-8 (CANH) - L96-19 (CANL) Engine switch off 200 Ω or higher
      L96-8 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      L96-19 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      L96-8 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      L96-19 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 13 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  17

    Result:  OK

    OK 

    See step  15

  15. CHECK FOR SHORT IN CAN BUS WIRES (NO. 13 JUNCTION CONNECTOR - DRIVER MONITOR ECU ASSEMBLY) 
    NOTE:

    For vehicles without a driver monitor camera, go to "Check for Short in CAN Bus Wires (No. 13 Junction Connector - Millimeter Wave Radar Sensor Assembly)".

    1. Measure the resistance according to the value(s) in the table below.
      GTY625139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L96-10 (CANH) - L96-21 (CANL) Engine switch off 200 Ω or higher
      L96-10 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      L96-21 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      L96-10 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      L96-21 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 13 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  19

    Result:  OK

    OK 

    See step  16

  16. CHECK FOR SHORT IN CAN BUS WIRES (NO. 13 JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY654915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L96-9 (CANH) - L96-20 (CANL) Engine switch off 108 to 132 Ω
      L96-9 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      L96-20 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      L96-9 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      L96-20 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 13 Junction Connector)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE NO. 13 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    See step  21

  17. CONNECT CONNECTOR 
    1. Reconnect the L96 No. 13 junction connector.

    Result:  NEXT

    NEXT 

    See step  18

  18. CHECK FOR SHORT IN CAN BUS WIRES (DRIVING SUPPORT ECU ASSEMBLY) 
    1. Disconnect the driving support ECU assembly connector.
      GTY682141Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A33-40 (CA1P) - A33-39 (CA1N) Engine switch off 54 to 69 Ω
      A33-40 (CA1P) - L31-4 (CG) Engine switch off 200 Ω or higher
      A33-39 (CA1N) - L31-4 (CG) Engine switch off 200 Ω or higher
      A33-40 (CA1P) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      A33-39 (CA1N) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Driving Support ECU Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE DRIVING SUPPORT ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVING SUPPORT ECU ASSEMBLY (CA1P, CA1N) 

  19. CONNECT CONNECTOR 
    1. Reconnect the L96 No. 13 junction connector.

    Result:  NEXT

    NEXT 

    See step  20

  20. CHECK FOR SHORT IN CAN BUS WIRES (DRIVER MONITOR ECU ASSEMBLY) 
    1. Disconnect the driver monitor ECU assembly connector.
      GTY629122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      L177-12 (CANH) - L177-11 (CANL) Engine switch off 54 to 69 Ω
      L177-12 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      L177-11 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      L177-12 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      L177-11 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Driver Monitor ECU Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE DRIVER MONITOR ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DRIVER MONITOR ECU ASSEMBLY (CANH, CANL) 

  21. CONNECT CONNECTOR 
    1. Reconnect the L96 No. 13 junction connector.

    Result:  NEXT

    NEXT 

    See step  22

  22. CHECK FOR SHORT IN CAN BUS WIRES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) 
    1. Disconnect the millimeter wave radar sensor assembly connector.
      GTY632183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      B9-4 (CA1P) - B9-3 (CA1N) Engine switch off 108 to 132 Ω
      B9-4 (CA1P) - L31-4 (CG) Engine switch off 200 Ω or higher
      B9-3 (CA1N) - L31-4 (CG) Engine switch off 200 Ω or higher
      B9-4 (CA1P) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      B9-3 (CA1N) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Millimeter Wave Radar Sensor Assembly)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MILLIMETER WAVE RADAR SENSOR ASSEMBLY (CA1P, CA1N) 

  23. CONNECT CONNECTOR 
    1. Reconnect the L96 No. 13 junction connector.

    Result:  NEXT

    NEXT 

    See step  24

  24. CHECK FOR SHORT IN CAN BUS WIRES (NO. 14 JUNCTION CONNECTOR - NO. 13 JUNCTION CONNECTOR) 
    1. Disconnect the No. 14 junction connector.
      GTY646737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R90-3 (CANH) - R90-14 (CANL) Engine switch off 108 to 132 Ω
      R90-3 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-14 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-3 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      R90-14 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 14 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 14 JUNCTION CONNECTOR - NO. 13 JUNCTION CONNECTOR) 

    Result:  OK

    OK 

    See step  25

  25. CHECK FOR SHORT IN CAN BUS WIRES (NO. 14 JUNCTION CONNECTOR - OBJECT RECOGNITION ECU) 
    NOTE:

    For vehicles without a driver monitor camera, go to "Check for Short in CAN Bus Wires (No. 14 Junction Connector - No. 1 Night View ECU)".

    1. Measure the resistance according to the value(s) in the table below.
      GTY671643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R90-2 (CANH) - R90-13 (CANL) Engine switch off 200 Ω or higher
      R90-2 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-13 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-2 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      R90-13 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 14 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  28

    Result:  OK

    OK 

    See step  26

  26. CHECK FOR SHORT IN CAN BUS WIRES (NO. 14 JUNCTION CONNECTOR - NO. 1 NIGHT VIEW ECU) 
    NOTE:

    For vehicles without a night view system, go to "Check for Short in CAN Bus Wires (No. 14 Junction Connector - No. 15 Junction Connector)".

    1. Measure the resistance according to the value(s) in the table below.
      GTY683793Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R90-4 (CANH) - R90-15 (CANL) Engine switch off 200 Ω or higher
      R90-4 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-15 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-4 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      R90-15 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 14 Junction Connector)
      *b Front view of DLC3

    Result:  NG

    NG 

    See step  30

    Result:  OK

    OK 

    See step  27

  27. CHECK FOR SHORT IN CAN BUS WIRES (NO. 14 JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY675422Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R90-5 (CANH) - R90-16 (CANL) Engine switch off 108 to 132 Ω
      R90-5 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-16 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      R90-5 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      R90-16 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 14 Junction Connector)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE NO. 14 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    See step  32

  28. CONNECT CONNECTOR 
    1. Reconnect the R90 No. 14 junction connector.

    Result:  NEXT

    NEXT 

    See step  29

  29. CHECK FOR SHORT IN CAN BUS WIRES (OBJECT RECOGNITION ECU) 
    1. Disconnect the object recognition ECU connector.
      GTY613472Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      g1-16 (CANH) - g1-5 (CANL) Engine switch off 54 to 69 Ω
      g1-16 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      g1-5 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      g1-16 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      g1-5 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Object Recognition ECU)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE OBJECT RECOGNITION ECU 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO OBJECT RECOGNITION ECU (CANH, CANL) 

  30. CONNECT CONNECTOR 
    1. Reconnect the R90 No. 14 junction connector.

    Result:  NEXT

    NEXT 

    See step  31

  31. CHECK FOR SHORT IN CAN BUS WIRES (NO. 1 NIGHT VIEW ECU) 
    1. Disconnect the No. 1 night view ECU connector.
      GTY614638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      g3-8 (CA1P) - g3-9 (CA1N) Engine switch off 54 to 69 Ω
      g3-8 (CA1P) - L31-4 (CG) Engine switch off 200 Ω or higher
      g3-9 (CA1N) - L31-4 (CG) Engine switch off 200 Ω or higher
      g3-8 (CA1P) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      g3-9 (CA1N) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 1 Night View ECU)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE NO. 1 NIGHT VIEW ECU 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO NO. 1 NIGHT VIEW ECU (CA1P, CA1N) 

  32. CONNECT CONNECTOR 
    1. Reconnect the R90 No. 14 junction connector.

    Result:  NEXT

    NEXT 

    See step  33

  33. CHECK FOR SHORT IN CAN BUS WIRES (NO. 15 JUNCTION CONNECTOR) 
    1. Disconnect the No. 15 junction connector.
      GTY636235Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      R91-3 (CANH) - R91-2 (CANL) Engine switch off 108 to 132 Ω
      R91-3 (CANH) - L31-4 (CG) Engine switch off 200 Ω or higher
      R91-2 (CANL) - L31-4 (CG) Engine switch off 200 Ω or higher
      R91-3 (CANH) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      R91-2 (CANL) - L31-16 (BAT) Engine switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 15 Junction Connector)
      *b Front view of DLC3

    Result:  OK

    OK 

    REPLACE NO. 15 JUNCTION CONNECTOR 

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 14 JUNCTION CONNECTOR) 

  34. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - BATTERY AND BODY GROUND) 
    1. Connect the cable to the negative (-) battery terminal.
      GTY667371Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [09/2015 - ] ).

    2. Disconnect the driving support ECU assembly connector.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      A33-13 (B) - Body ground Engine switch on (IG) 11 to 14 V
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A33-25 (GND) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Driving Support ECU Assembly)

    Result:  OK

    OK 

    REPLACE DRIVING SUPPORT ECU ASSEMBLY 

    (Refer to REMOVAL [09/2015 - ] )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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