CAN COMMUNICATION SYSTEM(w/o Central Gateway ECU), Diagnostic DTC:U1002

DTC Code DTC Name
U1002 Lost Communication with Gateway Module (Main Body ECU)

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
U1002 The main body ECU (multiplex network body ECU) cannot receive signals from all ECUs that have been memorized as those connected to sub bus 1.
  • Open or short in sub bus 1 main line or connector

  • Open or short in sub bus 1 branch line or connector

  • Main body ECU (multiplex network body ECU)

  • Front power seat switch LH*1*3

  • Front power seat switch RH*2

  • Outer mirror control ECU assembly LH*1

  • Outer mirror control ECU assembly RH*1

  • Multiplex tilt and telescopic ECU*1*4

  • Luggage closer motor assembly*5

  • Open or short in CAN junction connector LH2

  • Open or short in CAN junction connector RH2

  • Open or short in CAN No. 2 junction connector


Tech Tips

This diagnosis procedure is for when DTC U1002 is output by the main body ECU (multiplex network body ECU) (GTS display: Main Body).

WIRING DIAGRAM

A0008PXE03
A00084SE07
A0004IQE03
A00095GE05

CAUTION / NOTICE / HINT

Note


  • 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, 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.

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output Click here.

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

  • DTC check procedure: Turn the power switch on (IG) and wait at least 20 seconds.

  • After the repair, perform CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

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.

  • Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines. When the connectors have been disconnected from the CAN junction connector, reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B
    A
  2. CHECK SUB BUS 1


    1. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

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

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Below 54 Ω:

      Short circuit between bus lines

      70 Ω or higher:

      Open circuit in a main bus line

      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus line B
      Short circuit between bus lines C

      • Ground short

      • +B short

      D

    B
    C
    D
    A
  3. RECONFIRM DTC OUTPUT


    1. Reconnect the cable to the negative (-) auxiliary battery terminal.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.

    6. Turn the power switch off.

    7. Turn the power switch on (IG) and recheck for DTCs.

      Result
      Result Proceed to

      U1002 is output from main body ECU (multiplex network body ECU)

      (GTS display: Main Body)

      A
      Other DTC is output B

    A
    B
  4. CHECK FOR OPEN IN SUB BUS 1 LINES (CAN J/C LH2 - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H136 wire harness connector.

    2. A0008IEE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to Main Body ECU (Multiplex Network Body ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  5. CHECK FOR OPEN IN SUB BUS 1 LINES (CAN J/C LH2)


    1. Reconnect the H136 wire harness connector.

    2. A0006Z7E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to CAN Junction Connector RH2

      Disconnect the H142 wire harness connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H142-1 (CANH) - H142-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    OK
    NG
  6. CHECK FOR OPEN IN SUB BUS 1 LINES (CAN J/C LH2 - CAN J/C RH2)


    1. Reconnect the H142 wire harness connector.

    2. A0006BOE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector RH2)

      *b to CAN Junction Connector LH2

      Disconnect the H143 wire harness connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H143-1 (CANH) - H143-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  7. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (CAN J/C RH2)


    1. Reconnect the H143 wire harness connector.

    2. A0007W5E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector RH2)

      *b to CAN No. 2 Junction Connector

      Disconnect the H144 wire harness connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H144-1 (CANH) - H144-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    OK
    NG
  8. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (CAN NO. 2 J/C)


    1. Reconnect the H144 wire harness connector.

    2. A00060FE03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN No. 2 Junction Connector)

      *b to CAN Junction Connector RH2

      Disconnect the H145 CAN No. 2 junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-3 (CANH) - H145-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  9. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Reconnect the H136 wire harness connector.

    2. A000947E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Main Body ECU (Multiplex Network Body ECU))

      Disconnect the H9 main body ECU (multiplex network body ECU) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H9-9 (CANP) - H9-10 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  10. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C LH2 - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H136 wire harness connector.

    2. A0008IEE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to Main Body ECU (Multiplex Network Body ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  11. CHECK FOR SHORT IN SUB BUS 1 LINES (BRANCH LINE)


    1. Reconnect the H136 wire harness connector.

    2. A0009FUE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Connect the probes of an ohmmeter to terminals 1 (CANH) and 2 (CANL) of the main body ECU (multiplex network body ECU) main line harness connector.

    3. While observing the resistance value shown on the tester, disconnect connectors (H135, H137, H138, H139, H140 and H141) from the CAN junction connector LH2 or CAN junction connector RH2 one by one until the resistance becomes normal (between 54 and 69 Ω).

      A0003L8E05
      Text in Illustration
      *A w/ Seat Position Memory System (for Driver Side) *B w/ Seat Position Memory System (for Front Passenger Side)
      *C w/ Power Trunk Lid System - -
      *1 Main Body ECU (Multiplex Network Body ECU) *2 Front Power Seat Switch LH
      *3 Outer Mirror Control ECU Assembly LH *4 Multiplex Tilt and Telescopic ECU
      *5 Luggage Closer Motor Assembly *6 CAN Junction Connector LH2
      *7 Outer Mirror Control ECU Assembly RH *8 Front Power Seat Switch RH
      *9 CAN No. 2 Junction Connector *10 CAN Junction Connector RH2
      A0006S3E01
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector LH2)

      - -
      Wiring Color
      CAN Junction Connector LH2 Side Code Color (CANH Side) Color (CANL Side)
      Luggage closer motor assembly*1 H135 V GR
      Main body ECU (Multiplex network body ECU) H136 Y GR
      Multiplex tilt and telescopic ECU*2 H137 L GR
      Outer mirror control ECU assembly LH*2 H138 G GR
      Front power seat switch LH*2 H140 R GR
      CAN main bus line (bus line connecting CAN junction connector LH2 and CAN junction connector RH2) H142 B GR

      • *1: w/ Power trunk lid system

      • *2: w/ Seat position memory system (for driver side)

      A0006MHE01
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector RH2)

      - -
      Wiring Color
      CAN Junction Connector RH2 Side Code Color (CANH Side) Color (CANL Side)
      Outer mirror control ECU assembly RH*1 H139 R GR
      Front power seat switch RH*2 H141 G GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN junction connector LH2) H143 B GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN No. 2 junction connector) H144 L GR

      • *1: w/ Seat position memory system (for driver side)

      • *2: w/ Seat position memory system (for front passenger side)

      Note

      Do not reconnect the disconnected connectors until this inspection is complete because there may be a short in 2 or more branch lines.

      Result
      Symptom Proceed to
      The resistance is still below 54 Ω when all the specified connectors are disconnected. (There are no shorts between a pair of branch lines.) A
      The resistance becomes normal (between 54 and 69 Ω) when a connector is disconnected. (There is a short between one or more pairs of branch lines.) B
    4. When there is a short in one or more of the branch lines:


      1. Reconnect all of the connectors to the CAN junction connectors, except for the one that was disconnected last (the short-circuited bus line). Check that the resistance shown on the tester is normal (between 54 and 69 Ω) to confirm that there is a short in the one branch line only.

        Tech Tips


        • Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines.

        • Reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    B
    A
  12. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C LH2)


    1. Disconnect the H142 wire harness connector.

    2. A0009FUE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  13. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C LH2 - CAN J/C RH2)


    1. Reconnect the H142 wire harness connector.

    2. Disconnect the H143 wire harness connector.

    3. A0009FUE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  14. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C RH2)


    1. Reconnect the H143 wire harness connector.

    2. Disconnect the H144 wire harness connector.

    3. A0009FUE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  15. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN NO. 2 J/C)


    1. Reconnect the H144 wire harness connector.

    2. Disconnect the H145 CAN No. 2 junction connector.

    3. A0009FUE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  16. CHECK FOR SHORT IN SUB BUS 1 LINES (ECU, SENSOR)


    1. Reconnect the connector for the short-circuited branch line to the CAN junction connector (the connector that caused the bus line resistance to become normal (between 54 and 69 Ω) when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the short-circuited branch line is connected Click here.

    3. A0009FUE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU, there may be a short in the ECU.


    OK
    NG
  17. CHECK FOR SHORT IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Reconnect the H136 wire harness connector.

    2. A000947E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Main Body ECU (Multiplex Network Body ECU))

      Disconnect the H9 main body ECU (multiplex network body ECU) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H9-9 (CANP) - H9-10 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  18. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C LH2 - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H136 wire harness connector.

    2. A0009PLE01
      Text in Illustration
      *1 DLC3
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to Main Body ECU (Multiplex Network Body ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  19. CHECK FOR SHORT IN SUB BUS 1 LINE (BRANCH LINE)


    1. Reconnect the H136 wire harness connector.

    2. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Connect the probes of an ohmmeter to terminals 1 (CANH) and 2 (CANL) of the wire harness connector (H136) and CG or BAT of the DLC3.

      Tech Tips

      It is only necessary to perform the inspection for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

    3. While observing the resistance value shown on the ohmmeter, disconnect branch line connectors (H135, H137, H138, H139, H140 and H141) from the CAN junction connector LH2 or CAN junction connector RH2 until the resistance becomes normal (6 kΩ or higher (for +B short) or 200 Ω or higher (for ground short)).

      A0003L8E05
      Text in Illustration
      *A w/ Seat Position Memory System (for Driver Side) *B w/ Seat Position Memory System (for Front Passenger Side)
      *C w/ Power Trunk Lid System - -
      *1 Main Body ECU (Multiplex Network Body ECU) *2 Front Power Seat Switch LH
      *3 Outer Mirror Control ECU Assembly LH *4 Multiplex Tilt and Telescopic ECU
      *5 Luggage Closer Motor Assembly *6 CAN Junction Connector LH2
      *7 Outer Mirror Control ECU Assembly RH *8 Front Power Seat Switch RH
      *9 CAN No. 2 Junction Connector *10 CAN Junction Connector RH2
      A0006S3E01
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector LH2)

      - -
      Wiring Color
      CAN Junction Connector LH2 Side Code Color (CANH Side) Color (CANL Side)
      Luggage closer motor assembly*1 H135 V GR
      Main body ECU (Multiplex network body ECU) H136 Y GR
      Multiplex tilt and telescopic ECU*2 H137 L GR
      Outer mirror control ECU assembly LH*2 H138 G GR
      Front power seat switch LH*2 H140 R GR
      CAN main bus line (bus line connecting CAN junction connector LH2 and CAN junction connector RH2) H142 B GR

      • *1: w/ Power trunk lid system

      • *2: w/ Seat position memory system (for driver side)

      A0006MHE01
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector RH2)

      - -
      Wiring Color
      CAN Junction Connector RH2 Side Code Color (CANH Side) Color (CANL Side)
      Outer mirror control ECU assembly RH*1 H139 R GR
      Front power seat switch RH*2 H141 G GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN junction connector LH2) H143 B GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN No. 2 junction connector) H144 L GR

      • *1: w/ Seat position memory system (for driver side)

      • *2: w/ Seat position memory system (for front passenger side)

      Result
      Result Proceed to

      The resistance between terminals CANP and BAT, or the resistance between terminals CANN and BAT is still below 6 kΩ when all the specified connectors are disconnected from the CAN junction connector.

      (There is no short to +B in the branch lines.)

      A

      The resistance between terminals CANP and GND, or the resistance between terminals CANN and GND is still below 200 Ω when all the specified connectors are disconnected from the CAN junction connector.

      (There is no short to GND in the branch lines.)

      The resistance between terminals CANP and BAT, or the resistance between terminals CANN and BAT becomes normal (6 kΩ or higher) when a connector is disconnected from the CAN junction connector.

      (There is a short to +B in one of the areas related to one or more of the disconnected branch lines.)

      B

      The resistance between terminals CANP and GND, or the resistance between terminals CANN and GND becomes normal (200 Ω or higher) when a connector is disconnected from the CAN junction connector.

      (There is a short to GND in one of the areas related to one or more of the disconnected branch lines.)


    B
    A
  20. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C LH2)


    1. Disconnect the H142 wire harness connector.

    2. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  21. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C LH2 - CAN J/C RH2)


    1. Reconnect the H142 wire harness connector.

    2. Disconnect the H143 wire harness connector.

    3. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  22. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C RH2)


    1. Reconnect the H143 wire harness connector.

    2. Disconnect the H144 wire harness connector.

    3. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  23. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN NO. 2 J/C)


    1. Reconnect the H144 wire harness connector.

    2. Disconnect the H145 CAN No. 2 junction connector.

    3. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    OK
    NG
  24. CHECK FOR SHORT IN SUB BUS 1 LINE (ECU, SENSOR)


    1. Reconnect the connector for the bus line that is shorted to +B or GND to the CAN junction connector (the connector that caused the bus line resistance to change to 6 kΩ or higher (for +B short) or 200 Ω or higher (for ground short) when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the bus line shorted to +B or GND is connected Click here.

    3. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • If the resistance becomes normal when the connector is disconnected from the ECU, there may be a short in the ECU.


    OK
    NG
  25. CHECK FOR SHORT IN SUB BUS 1 LINE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H9 main body ECU (multiplex network body ECU) connector.

    2. A0009PLE01
      Text in Illustration
      *1 DLC3
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to Main Body ECU (Multiplex Network Body ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    OK
    NG
  26. CHECK SUB BUS 1


    1. A00080GE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

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

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Below 54 Ω:

      Short circuit between bus lines

      70 Ω or higher:

      Open circuit in a main bus line

      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Result
      Result Proceed to
      OK A
      Open circuit in CAN main bus line B
      Short circuit between bus lines C

      • Ground short

      • +B short

      D

    B
    C
    D
    A
  27. RECONFIRM DTC OUTPUT


    1. Reconnect the cable to the negative (-) auxiliary battery terminal.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Clear the DTCs.

    6. Turn the power switch off.

    7. Turn the power switch on (IG) and recheck for DTCs.

      Result
      Result Proceed to

      U1002 is output from main body ECU (multiplex network body ECU)

      (GTS display: Main Body)

      A
      Other DTC is output B

    A
    B
  28. CHECK FOR OPEN IN SUB BUS 1 LINES (CAN J/C LH2 - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H136 wire harness connector.

    2. A0007IOE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to Main Body ECU (Multiplex Network Body ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  29. CHECK FOR OPEN IN SUB BUS 1 LINES (CAN J/C LH2)


    1. Reconnect the H136 wire harness connector.

    2. A0006RJE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to CAN Junction Connector RH2

      Disconnect the H142 wire harness connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H142-1 (CANH) - H142-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    OK
    NG
  30. CHECK FOR OPEN IN SUB BUS 1 LINES (CAN J/C LH2 - CAN J/C RH2)


    1. Reconnect the H142 wire harness connector.

    2. A0008PGE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector RH2)

      *b to CAN Junction Connector LH2

      Disconnect the H143 wire harness connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H143-1 (CANH) - H143-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  31. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (CAN J/C RH2)


    1. Reconnect the H143 wire harness connector.

    2. A0008ZJE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector RH2)

      *b to CAN No. 2 Junction Connector

      Disconnect the H144 wire harness connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H144-1 (CANH) - H144-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    OK
    NG
  32. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (CAN NO. 2 J/C)


    1. Reconnect the H144 wire harness connector.

    2. A0003ZEE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN No. 2 Junction Connector)

      *b to CAN Junction Connector RH2

      Disconnect the H145 CAN No. 2 junction connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H145-3 (CANH) - H145-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  33. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Reconnect the H136 wire harness connector.

    2. A0006WDE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Main Body ECU (Multiplex Network Body ECU))

      Disconnect the H9 main body ECU (multiplex network body ECU) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H9-9 (CANP) - H9-10 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  34. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C LH2 - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H136 wire harness connector.

    2. A0007IOE02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to Main Body ECU (Multiplex Network Body ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  35. CHECK FOR SHORT IN SUB BUS 1 LINES (BRANCH LINE)


    1. Reconnect the H136 wire harness connector.

    2. A0009FUE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Connect the probes of an ohmmeter to terminals 1 (CANH) and 2 (CANL) of the main body ECU main line harness connector.

    3. While observing the resistance value shown on the tester, disconnect connectors (H135, H137, H138, H139, H140 and H141) from the CAN junction connector LH2 or CAN junction connector RH2 one by one until the resistance becomes normal (between 54 and 69 Ω).

      A0006DVE02
      Text in Illustration
      *A w/ Seat Position Memory System (for Front Passenger Side) *B w/ Power Tilt and Power Telescopic Steering Column System
      *C w/ Power Trunk Lid System - -
      *1 CAN No. 2 Junction Connector *2 Front Power Seat Switch RH
      *3 Outer Mirror Control ECU Assembly RH *4 Multiplex Tilt and Telescopic ECU
      *5 Luggage Closer Motor Assembly *6 CAN Junction Connector RH2
      *7 Front Power Seat Switch LH *8 Outer Mirror Control ECU Assembly LH
      *9 Main Body ECU (Multiplex Network Body ECU) *10 CAN Junction Connector LH2
      A0009P2E03
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector LH2)

      - -
      Wiring Color
      CAN Junction Connector LH2 Side Code Color (CANH Side) Color (CANL Side)
      Main body ECU (multiplex network body ECU) H136 L GR
      Outer mirror control ECU assembly LH H138 G GR
      Front power seat switch LH* H140 R GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN junction connector LH2) H142 B GR

      • *: w/ Seat position memory system (for front passenger side)

      A0009BWE02
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector RH2)

      - -
      Wiring Color
      CAN Junction Connector RH2 Side Code Color (CANH Side) Color (CANL Side)
      CAN main bus line (bus line connecting CAN junction connector LH2 and CAN junction connector RH2) H143 B GR
      Outer mirror control ECU assembly RH H139 R GR
      Front power seat switch RH H141 G GR
      Multiplex tilt and telescopic ECU*1 H137 L GR
      Luggage closer motor assembly*2 H135 Y GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN No. 2 junction connector) H144 V GR

      • *1: w/ Power tilt and power telescopic steering column system

      • *2: w/ Power trunk lid system

      Note

      Do not reconnect the disconnected connectors until this inspection is complete because there may be a short in 2 or more branch lines.

      Result
      Symptom Proceed to
      The resistance is still below 54 Ω when all the specified connectors are disconnected. (There are no shorts between a pair of branch lines.) A
      The resistance becomes normal (between 54 and 69 Ω) when a connector is disconnected. (There is a short between one or more pairs of branch lines.) B
    4. When there is a short in one or more of the branch lines:


      1. Reconnect all of the connectors to the CAN junction connectors, except for the one that was disconnected last (the short-circuited bus line). Check that the resistance shown on the tester is normal (between 54 and 69 Ω) to confirm that there is a short in the one branch line only.

        Tech Tips


        • Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines.

        • Reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wiring harnesses, and to make future maintenance easier.


    B
    A
  36. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C LH2)


    1. Disconnect the H142 wire harness connector.

    2. A0004WIE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  37. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C LH2 - CAN J/C RH2)


    1. Reconnect the H142 wire harness connector.

    2. Disconnect the H143 wire harness connector.

    3. A0004WIE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  38. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN J/C RH2)


    1. Reconnect the H143 wire harness connector.

    2. Disconnect the H144 wire harness connector.

    3. A0004WIE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.


    NG
    OK
  39. CHECK FOR SHORT IN SUB BUS 1 LINES (CAN NO. 2 J/C)


    1. Reconnect the H144 wire harness connector.

    2. Disconnect the H145 CAN No. 2 junction connector.

    3. A0004WIE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  40. CHECK FOR SHORT IN SUB BUS 1 LINES (ECU, SENSOR)


    1. Reconnect the connector for the short-circuited branch line to the CAN junction connector (the connector that caused the bus line resistance to become normal (between 54 and 69 Ω) when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the short-circuited branch line is connected Click here.

    3. A0004WIE01
      Text in Illustration
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H136-1 (CANH) - H136-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Tech Tips

      If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU, there may be a short in the ECU.


    OK
    NG
  41. CHECK FOR SHORT IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Reconnect the H136 wire harness connector.

    2. A0006WDE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Main Body ECU (Multiplex Network Body ECU))

      Disconnect the H9 main body ECU (multiplex network body ECU) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H9-9 (CANP) - H9-10 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK
    NG
  42. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C LH2 - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H136 wire harness connector.

    2. A00046LE01
      Text in Illustration
      *1 DLC3
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      *b to Main Body ECU (Multiplex Network Body ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  43. CHECK FOR SHORT IN SUB BUS 1 LINE (BRANCH LINE)


    1. Disconnect the H136 wire harness connector.

    2. A0003SWE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Connect the probes of an ohmmeter to terminals 1 (CANH) and 2 (CANL) of the wire harness connector (H136) and CG or BAT of the DLC3.

      Tech Tips

      It is only necessary to perform the inspection for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

    3. While observing the resistance value shown on the ohmmeter, disconnect branch line connectors (H135, H137, H138, H139, H140 and H141) from the CAN junction connector LH2 or CAN junction connector RH2 until the resistance becomes normal (6 kΩ or higher (for +B short) or 200 Ω or higher (for ground short)).

      A0006DVE02
      Text in Illustration
      *A w/ Seat Position Memory System (for Front Passenger Side) *B w/ Power Tilt and Power Telescopic Steering Column System
      *C w/ Power Trunk Lid System - -
      *1 CAN No. 2 Junction Connector *2 Front Power Seat Switch RH
      *3 Outer Mirror Control ECU Assembly RH *4 Multiplex Tilt and Telescopic ECU
      *5 Luggage Closer Motor Assembly *6 CAN Junction Connector RH2
      *7 Front Power Seat Switch LH *8 Outer Mirror Control ECU Assembly LH
      *9 Main Body ECU (Multiplex Network Body ECU) *10 CAN Junction Connector LH2
      A0009P2E03
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector LH2)

      - -
      Wiring Color
      CAN Junction Connector LH2 Side Code Color (CANH Side) Color (CANL Side)
      Main body ECU (Multiplex network body ECU) H136 L GR
      Outer mirror control ECU assembly LH H138 G GR
      Front power seat switch LH* H140 R GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN junction connector LH2) H142 B GR

      • *: w/ Seat position memory system (for front passenger side)

      A0009BWE02
      Text in Illustration
      *a

      Component without harness connected

      (CAN Junction Connector RH2)

      - -
      Wiring Color
      CAN Junction Connector RH2 Side Code Color (CANH Side) Color (CANL Side)
      CAN main bus line (bus line connecting CAN junction connector LH2 and CAN junction connector RH2) H143 B GR
      Outer mirror control ECU assembly RH H139 R GR
      Front power seat switch RH H141 G GR
      Multiplex tilt and telescopic ECU*1 H137 L GR
      Luggage closer motor assembly*2 H135 Y GR
      CAN main bus line (bus line connecting CAN junction connector RH2 and CAN No. 2 junction connector) H144 V GR

      • *1: w/ Power tilt and power telescopic steering column system

      • *2: w/ Power trunk lid system

      Result
      Result Proceed to

      The resistance between terminals CANP and BAT, or the resistance between terminals CANN and BAT is still below 6 kΩ when all the specified connectors are disconnected from the CAN junction connector.

      (There is no short to +B in the branch lines.)

      A

      The resistance between terminals CANP and GND, or the resistance between terminals CANN and GND is still below 200 Ω when all the specified connectors are disconnected from the CAN junction connector.

      (There is no short to GND in the branch lines.)

      The resistance between terminals CANP and BAT, or the resistance between terminals CANN and BAT becomes normal (6 kΩ or higher) when a connector is disconnected from the CAN junction connector.

      (There is a short to +B in one of the areas related to one or more of the disconnected branch lines.)

      B

      The resistance between terminals CANP and GND, or the resistance between terminals CANN and GND becomes normal (200 Ω or higher) when a connector is disconnected from the CAN junction connector.

      (There is a short to GND in one of the areas related to one or more of the disconnected branch lines.)


    B
    A
  44. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C LH2)


    1. Disconnect the H142 wire harness connector.

    2. A00080GE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  45. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C LH2 - CAN J/C RH2)


    1. Reconnect the H142 wire harness connector.

    2. Disconnect the H143 wire harness connector.

    3. A00080GE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  46. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN J/C RH2)


    1. Reconnect the H143 wire harness connector.

    2. Disconnect the H144 wire harness connector.

    3. A00080GE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Note


      • Before disconnecting the connector, make a note of where it is connected.

      • Reconnect the connector to its original position.

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    NG
    OK
  47. CHECK FOR SHORT IN SUB BUS 1 LINE (CAN NO. 2 J/C)


    1. Reconnect the H144 wire harness connector.

    2. Disconnect the H145 CAN No. 2 junction connector.

    3. A00080GE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    OK
    NG
  48. CHECK FOR SHORT IN SUB BUS 1 LINE (ECU, SENSOR)


    1. Reconnect the connector for the bus line that is shorted to +B or GND to the CAN junction connector (the connector that caused the bus line resistance to change to 6 kΩ or higher (for +B short) or 200 Ω or higher (for ground short) when it was disconnected).

    2. Disconnect the connector that includes terminals CANH and CANL from the ECU to which the bus line shorted to +B or GND is connected Click here.

    3. A00080GE01
      Text in Illustration
      *1 DLC3
      *a

      Component with harness connected

      (CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • If the resistance becomes normal when the connector is disconnected from the ECU, there may be a short in the ECU.


    OK
    NG
  49. CHECK FOR SHORT IN SUB BUS 1 LINE (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H9 main body ECU (multiplex network body ECU) connector.

    2. A00046LE01
      Text in Illustration
      *1 DLC3
      *a

      Rear view of wire harness connector

      (to CAN Junction Connector LH2)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      H136-1 (CANH) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short

      H136-2 (CANL) - H29-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

      H136-1 (CANH) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short

      H136-2 (CANL) - H29-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Tech Tips


      • It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 1 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Specified Condition column from the Check Sub Bus 1 inspection.


    OK
    NG