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Home >> Toyota >> 2011 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System (W/O Smart Key) (Diagnostic Codes & Circuit Tests) (Hybrid) >> CAN COMMUNICATION SYSTEM (w/o Smart Key System) >> DTC U1002: Lost Communication with Gateway Module (MS Bus) >> Procedure

DTC U1002: Lost Communication with Gateway Module (MS Bus): Procedure

  1. 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 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 .

    NEXT: Go to next step 

  2. CHECK CAN BUS WIRE (CHECK MAIN WIRE FOR DISCONNECTION, CHECK BUS LINE FOR SHORT CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying O24 & D47 CAN BUS Wire Connector Terminals
      GTY303990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition Resistance: Malfunction
      O24-1 (CANH) - O24-2 (CANL) Ignition switch off 54 to 69 Ω Below 54 Ω: Short in line
      O24-1 (CANH) - O24-2 (CANL) Ignition switch off 54 to 69 Ω Higher than 69 Ω: Open in CAN main bus line
      O24-1 (CANH) - D47-16 (BAT) Ignition switch off 6 kΩ or higher Below 6 kΩ: +B short
      O24-2 (CANL) - D47-16 (BAT) Ignition switch off 6 kΩ or higher Below 6 kΩ: +B short
      O24-1 (CANH) - D47-4 (CG) Ignition switch off 200 Ω or higher Below 200 Ω: Ground short
      O24-2 (CANL) - D47-4 (CG) Ignition switch off 200 Ω or higher Below 200 Ω: Ground short
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (CAN Junction Connector)
      *b Front view of DLC3
      RESULT

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

    B → See step   9 

    C → See step   21 

    A: Go to next step 

  3. CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - CAN JUNCTION CONNECTOR) 
    1. Disconnect the D80 No. 3 junction connector.
      Fig 2: Identifying D80 No. 3 Junction Connector Terminal
      GTY297403Courtesy 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
      D80-11 (CANH) - D80-2 (CANL) Ignition switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 3 Junction Connector)

    NG → See step   5 

    OK: Go to next step 

  4. CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 3: Identifying No. 3 Junction D80 Connector Terminals
      GTY297492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      D80-10 (CANH) - D80-3 (CANL) Ignition switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 3 Junction Connector)

    NG → See step   7 

    OK → REPLACE NO. 3 JUNCTION CONNECTOR 

  5. CONNECT CONNECTOR 
    1. Reconnect the D80 No. 3 junction connector.

    NEXT: Go to next step 

  6. CHECK FOR OPEN IN CAN BUS WIRE (CAN JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) 
    1. Disconnect the O24 CAN junction connector.
      Fig 4: Disconnecting O24 CAN Junction Connector
      GTY298471Courtesy 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
      O24-1 (CANH) - O24-2 (CANL) Ignition switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to CAN Junction Connector)

    NG → REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) 

    OK → REPLACE CAN JUNCTION CONNECTOR 

  7. CONNECT CONNECTOR 
    1. Reconnect the D80 No. 3 junction connector.

    NEXT: Go to next step 

  8. CHECK FOR OPEN IN CAN BUS WIRE (MAIN BODY ECU - NO. 3 JUNCTION CONNECTOR) 
    1. Disconnect the D9 main body ECU (instrument panel junction block assembly) connector.
      Fig 5: Disconnecting D9 Main Body ECU Instrument Panel Junction Block Assembly Connector
      GTY303448Courtesy 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
      D9-16 (CANP) - D9-15 (CANN) Ignition switch off 108 to 132 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Main Body ECU [Instrument Panel Junction Block Assembly])

    NG → REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MAIN BODY ECU (MAIN BODY ECU - NO. 3 JUNCTION CONNECTOR) 

    OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 

  9. CHECK FOR SHORT IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR SIDE) 
    1. Disconnect the D80 No. 3 junction connector.
      Fig 6: Disconnecting D80, D47 No. 3 Junction Connector Terminal
      GTY300560Courtesy 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
      D80-11 (CANH) - D80-2 (CANL) Ignition switch off 108 to 132 Ω
      D80-11 (CANH) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D80-2 (CANL) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D80-11 (CANH) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      D80-2 (CANL) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 3 Junction Connector)
      *b Front view of DLC3

    NG → See step   12 

    OK: Go to next step 

  10. CHECK FOR SHORT IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - TIRE PRESSURE MONITOR ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 7: Identifying D80, D47 No. 3 Junction Connector Terminal
      GTY300636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      D80-9 (CANH) - D80-8 (CANL) Ignition switch off 200 Ω or higher
      D80-9 (CANH) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D80-8 (CANL) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D80-9 (CANH) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      D80-8 (CANL) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 3 Junction Connector)
      *b Front view of DLC3

    NG → See step   17 

    OK: Go to next step 

  11. CHECK FOR SHORT IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - MAIN BODY ECU) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 8: Identifying D80, D47 No. 3 Junction Connector Terminal
      GTY300774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      D80-10 (CANH) - D80-3 (CANL) Ignition switch off 108 to 132 Ω
      D80-10 (CANH) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D80-3 (CANL) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D80-10 (CANH) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      D80-3 (CANL) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to No. 3 Junction Connector)
      *b Front view of DLC3

    NG → See step   19 

    OK → REPLACE NO. 3 JUNCTION CONNECTOR 

  12. CONNECT CONNECTOR 
    1. Reconnect the D80 No. 3 junction connector.

    NEXT: Go to next step 

  13. CHECK FOR SHORT IN CAN BUS WIRE (CAN JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) 
    1. Disconnect the O24 CAN junction connector.
      Fig 9: Identifying O24, D47 CAN Junction Connector Terminals
      GTY302293Courtesy 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
      O24-1 (CANH) - O24-2 (CANL) Ignition switch off 108 to 132 Ω
      O24-1 (CANH) - D47-4 (CG) Ignition switch off 200 Ω or higher
      O24-2 (CANL) - D47-4 (CG) Ignition switch off 200 Ω or higher
      O24-1 (CANH) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      O24-2 (CANL) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to CAN Junction Connector)
      *b Front view of DLC3
      RESULT

      Result Proceed to
      OK (w/ Power Back Door System) A
      OK (w/o Power Back Door System) B
      NG C

    B → REPLACE CAN JUNCTION CONNECTOR 

    C → REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) 

    A: Go to next step 

  14. CHECK FOR SHORT IN CAN BUS WIRE (CAN JUNCTION CONNECTOR - POWER BACK DOOR ECU) 
    1. Disconnect the O21 CAN junction connector.
      Fig 10: Identifying O21 & D47 CAN Junction Connector
      GTY302279Courtesy 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
      O21-1 (CANH) - O21-2 (CANL) Ignition switch off 200 Ω or higher
      O21-1 (CANH) - D47-4 (CG) Ignition switch off 200 Ω or higher
      O21-2 (CANL) - D47-4 (CG) Ignition switch off 200 Ω or higher
      O21-1 (CANH) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      O21-2 (CANL) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to CAN Junction Connector)
      *b Front view of DLC3

    NG → See step   15 

    OK → REPLACE CAN JUNCTION CONNECTOR 

  15. CONNECT CONNECTOR 
    1. Reconnect the O21 and O24 CAN junction connectors.

    NEXT: Go to next step 

  16. CHECK FOR SHORT IN CAN BUS WIRE (POWER BACK DOOR ECU) 
    1. Disconnect the O15 back door motor unit (power back door ECU) connector.
      Fig 11: Identifying O15 & D47 Back Door Motor Unit Power Back Door ECU Connector
      GTY305892Courtesy 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
      O15-6 (MPX1) - O15-5 (MPX2) Ignition switch off 54 to 69 Ω
      O15-6 (MPX1) - D47-4 (CG) Ignition switch off 200 Ω or higher
      O15-5 (MPX2) - D47-4 (CG) Ignition switch off 200 Ω or higher
      O15-6 (MPX1) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      O15-5 (MPX2) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Back Door Motor Unit [Power Back Door ECU])
      *b Front view of DLC3

    NG → REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER BACK DOOR ECU (MPX1, MPX2) 

    OK → See step   22 

  17. CONNECT CONNECTOR 
    1. Reconnect the D80 No. 3 junction connector.

    NEXT: Go to next step 

  18. CHECK FOR SHORT IN CAN BUS WIRE (TIRE PRESSURE MONITOR ECU) 
    1. Disconnect the D33 tire pressure monitor ECU connector.
      Fig 12: Identifying D33, D47 Tire Pressure Monitor ECU Connector
      GTY301919Courtesy 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
      D33-6 (CANP) - D33-12 (CANN) Ignition switch off 54 to 69 Ω
      D33-6 (CANP) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D33-12 (CANN) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D33-6 (CANP) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      D33-12 (CANN) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

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

    NG → REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO TIRE PRESSURE MONITOR ECU (CANP, CANN) 

    OK → See step   23 

  19. CONNECT CONNECTOR 
    1. Reconnect the D80 No. 3 junction connector.

    NEXT: Go to next step 

  20. CHECK FOR SHORT IN CAN BUS WIRE (MAIN BODY ECU) 
    1. Disconnect the D9 main body ECU (instrument panel junction block assembly) connector.
      Fig 13: Identifying D9, D47 Main Body ECU Instrument Panel Junction Block Assembly Connector
      GTY303639Courtesy 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
      D9-16 (CANP) - D9-15 (CANN) Ignition switch off 108 to 132 Ω
      D9-16 (CANP) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D9-15 (CANN) - D47-4 (CG) Ignition switch off 200 Ω or higher
      D9-16 (CANP) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      D9-15 (CANN) - D47-16 (BAT) Ignition switch off 6 kΩ or higher
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Main Body ECU [Instrument Panel Junction Block Assembly])
      *b Front view of DLC3

    NG → REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO MAIN BODY ECU (CANP, CANN) 

    OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 

  21. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) 
    1. Connect the cable to the negative (-) battery terminal.
      NOTE:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected, refer to INITIALIZATION .

      Fig 14: Identifying Main Body ECU Instrument Panel Junction Block Assembly
      GTY303666Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Front view of wire harness connector
      (to Main Body ECU [Instrument Panel Junction Block Assembly])      		 - -
    2. Disconnect the 1D, 1F, 1M and D9 main body ECU (instrument panel junction block assembly) connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1F-10 (GND1) - Body ground Always Below 1 Ω
      1M-9 (GND2) - Body ground Always Below 1 Ω
      D9-1 (GND3) - Body ground Always Below 1 Ω
    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      1D-16 (ALTB) - Body ground Always 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 

  22. REPLACE BACK DOOR MOTOR UNIT (POWER BACK DOOR ECU). Refer to  REMOVAL 
  23. REPLACE TIRE PRESSURE MONITOR ECU. Refer to  REMOVAL 
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