CAN COMMUNICATION SYSTEM, Diagnostic DTC:U1002

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

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area Note
U1002 Lost Communication with Gateway Module (Main Body ECU) 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)

  • Outer mirror control ECU assembly (for driver side)

    (w/ Seat position memory system)

  • Outer mirror control ECU assembly (for front passenger side)

    (w/ Seat position memory system)

  • Position control ECU and switch assembly

    (w/ Seat position memory system)

  • Multiplex network door ECU

    (w/ Power back door system)

  • Open or short in No. 5 CAN junction connector

  • Open or short in No. 6 CAN junction connector

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

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

A0029QQE01
A002A6AE01

CAUTION / NOTICE / HINT

Note


  • Before measuring the resistance of the CAN bus, turn the ignition 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 (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) 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 ignition switch to ON and wait at least 20 seconds.

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

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

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


    • *: w/ Smart Entry and Start System

Tech Tips


  • Operating the ignition 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.

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Result Proceed to
      for LHD A
      for RHD B

    B

    CHECK SUB BUS 1 Click here

    A

  2. CHECK SUB BUS 1


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

    2. A002AC7C06
      *1 DLC3
      *a

      Component with harness connected

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or more: Open circuit in main bus line
      F18-9 (CANP) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      F18-10 (CANN) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F18-9 (CANP) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      F18-10 (CANN) - F25-16 (BAT) Cable disconnected from negative (-) 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

    CHECK FOR OPEN IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Click here

    C

    CHECK FOR SHORT IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Click here

    D

    CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 6 CAN JUNCTION CONNECTOR) Click here

    A

  3. CHECK FOR DTC OUTPUT


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

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Clear the DTCs.


      Body Electrical > Main Body > Clear DTCs

    6. Turn the ignition switch off.

    7. Turn the ignition switch to ON.

    8. Check for DTCs.


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC U1002 not output from main body ECU (multiplex network body ECU) (GTS display: Main Body) A
      DTC U1002 is output from main body ECU (multiplex network body ECU) (GTS display: Main Body) B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

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


    1. Disconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. A0029SPC12
      *a

      Front view of wire harness connector

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  5. CHECK FOR OPEN IN SUB BUS 1 LINES (MULTIPLEX NETWORK DOOR ECU)


    1. Reconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the X6 multiplex network door ECU connector.

    3. A002CCOC02
      *a

      Front view of wire harness connector

      (to Multiplex Network Door ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X6-13 (CANP) - X6-14 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

  6. CHECK FOR OPEN IN SUB BUS 1 LINES (NO. 6 CAN JUNCTION CONNECTOR)


    1. Reconnect the X6 multiplex network door ECU connector.

    2. Disconnect the F112 No. 6 CAN junction connector.

    3. A002A22C01
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to Main Body ECU (Multiplex Network Body ECU)
      *c to No. 5 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F112-2 (CANH) - F112-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      F112-5 (CANH) - F112-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main line) B
      NG (No. 5 CAN junction connector main line) C

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

  7. CHECK FOR OPEN IN SUB BUS 1 LINES (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F111 No. 5 CAN junction connector.

    3. A002A22C02
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b to Multiplex Network Door ECU
      *c to No. 6 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F111-1 (CANH) - F111-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Multiplex network door ECU
      F111-5 (CANH) - F111-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 6 CAN junction connector main line) B
      NG (Multiplex network door ECU main line) C

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - MULTIPLEX NETWORK DOOR ECU)

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


    1. Disconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. A0029SPC13
      *a

      Front view of wire harness connector

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  9. CHECK FOR SHORT IN SUB BUS 1 LINES (MULTIPLEX NETWORK DOOR ECU)


    1. Reconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the X6 multiplex network door ECU connector.

    3. A002CCOC03
      *a

      Front view of wire harness connector

      (to Multiplex Network Door ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X6-13 (CANP) - X6-14 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

  10. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 6 CAN JUNCTION CONNECTOR)


    1. Reconnect the X6 multiplex network door ECU connector.

    2. Disconnect the F112 No. 6 CAN junction connector.

    3. A002A22C03
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to Main Body ECU (Multiplex Network Body ECU)
      *c

      to Outer Mirror Control ECU Assembly (for Front Passenger Side)

      (w/ Seat Position Memory System)
      *d to No. 5 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F112-2 (CANH) - F112-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      F112-3 (CANH) - F112-14 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Outer mirror control ECU assembly (for front passenger side)*
      F112-5 (CANH) - F112-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector

      *: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main line) B
      NG (ECU or sensor branch line) C
      NG (No. 5 CAN junction connector main line) D

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

    GO TO STEP 12 Click here

    D

  11. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F111 No. 5 CAN junction connector.

    3. A002A22C04
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b

      to Multiplex Network Door ECU

      (w/ Power Back Door System)
      *c

      to Position Control ECU and Switch Assembly

      (w/ Seat Position Memory System)
      *d

      to Outer Mirror Control ECU Assembly (for Driver Side)

      (w/ Seat Position Memory System)
      *e to No. 6 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F111-1 (CANH) - F111-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Multiplex network door ECU*1
      F111-3 (CANH) - F111-14 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Position control ECU and switch assembly*2
      F111-4 (CANH) - F111-15 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Outer mirror control ECU assembly (for driver side)*2
      F111-5 (CANH) - F111-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector

      • *1: w/ Power Back Door System

      • *2: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (No. 6 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (Multiplex network door ECU main line) D

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - MULTIPLEX NETWORK DOOR ECU)

    C

  12. CHECK FOR SHORT IN SUB BUS 1 LINES (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A002BH7C01
      *a

      Component with harness connected

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) 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 or sensor, there may be a short in the ECU or sensor.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU SENSOR BUS LINES OR CONNECTOR

  13. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 6 CAN JUNCTION CONNECTOR)


    1. Disconnect the F112 No. 6 CAN junction connector.

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

      A0029QKC01
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)

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

      to Outer Mirror Control ECU Assembly (for Front Passenger Side)

      (w/ Seat Position Memory System)

      		 *d to No. 5 CAN Junction Connector
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      F112-2 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Main body ECU (multiplex network body ECU)
      F112-13 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F112-3 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Outer mirror control ECU assembly (for front passenger side)*
      F112-14 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F112-5 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 5 CAN junction connector
      F112-16 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F112-2 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Main body ECU (multiplex network body ECU)
      F112-13 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F112-3 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for front passenger side)*
      F112-14 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F112-5 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 5 CAN junction connector
      F112-16 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      *: w/ Seat Position Memory System

      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 Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main line) B
      NG (ECU or sensor bus line) C
      NG (No. 5 CAN junction connector main line) D

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    C

    GO TO STEP 16 Click here

    D

    CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 5 CAN JUNCTION CONNECTOR) Click here

    B

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


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F18 main body ECU (multiplex network body ECU).

    3. A002AL9C03
      *1 DLC3
      *a

      Front view of wire harness connector

      (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
      F18-9 (CANP) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      F18-10 (CANN) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F18-9 (CANP) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      F18-10 (CANN) - F25-16 (BAT) Cable disconnected from negative (-) 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 Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

  15. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F111 No. 5 CAN junction connector.

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

      A0029QKC02
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)

      		 *b

      to Multiplex Network Door ECU

      (w/ Power Back Door System)
      *c

      to Position Control ECU and Switch Assembly

      (w/ Seat Position Memory System)

      		 *d

      to Outer Mirror Control ECU Assembly (for Driver Side)

      (w/ Seat Position Memory System)
      *e to No. 6 CAN Junction Connector - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      F111-1 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Multiplex network door ECU*1
      F111-12 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F111-3 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Position control ECU and switch assembly*2
      F111-14 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F111-4 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Outer mirror control ECU assembly (for driver side)*2
      F111-15 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F111-5 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 6 CAN junction connector
      F111-16 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F111-1 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Power back door motor unit*1
      F111-12 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F111-3 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Position control ECU and switch assembly*2
      F111-14 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F111-4 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for driver side)*2
      F111-15 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F111-5 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 6 CAN junction connector
      F111-16 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ Power Back Door System

      • *2: w/ Seat Position Memory System

      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 Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (No. 5 CAN junction connector main line) B
      NG (ECU or sensor branch line) C

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    C

  16. CHECK FOR SHORT IN SUB BUS 1 LINE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A002AC7C07
      *1 DLC3
      *a

      Component with harness connected

      (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
      F18-9 (CANP) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      F18-10 (CANN) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F18-9 (CANP) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      F18-10 (CANN) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +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.

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

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU SENSOR BUS LINES OR CONNECTOR

  17. CHECK SUB BUS 1


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

    2. A002AC7C08
      *1 DLC3
      *a

      Component with harness connected

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) battery terminal 54 to 69 Ω Below 54 Ω: Short circuit between bus lines
      70 Ω or more: Open circuit in main bus line
      F18-9 (CANP) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      F18-10 (CANN) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F18-9 (CANP) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      F18-10 (CANN) - F25-16 (BAT) Cable disconnected from negative (-) 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

    CHECK FOR OPEN IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Click here

    C

    CHECK FOR SHORT IN SUB BUS 1 LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) Click here

    D

    CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 6 CAN JUNCTION CONNECTOR) Click here

    A

  18. CHECK FOR DTC OUTPUT


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

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Clear the DTCs.


      Body Electrical > Main Body > Clear DTCs

    6. Turn the ignition switch off.

    7. Turn the ignition switch to ON.

    8. Check for DTCs.


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC U1002 not output from main body ECU (multiplex network body ECU) (GTS display: Main Body) A
      DTC U1002 is output from main body ECU (multiplex network body ECU) (GTS display: Main Body) B

    A

    SYMPTOM SIMULATION Click here

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

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


    1. Disconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. A0029SPC14
      *a

      Front view of wire harness connector

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  20. CHECK FOR OPEN IN SUB BUS 1 LINES (MULTIPLEX NETWORK DOOR ECU)


    1. Reconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the X6 multiplex network door ECU connector.

    3. A002CCOC02
      *a

      Front view of wire harness connector

      (to Multiplex Network Door ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X6-13 (CANP) - X6-14 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

  21. CHECK FOR OPEN IN SUB BUS 1 LINES (NO. 6 CAN JUNCTION CONNECTOR)


    1. Reconnect the X6 multiplex network door ECU connector.

    2. Disconnect the F112 No. 6 CAN junction connector.

    3. A002A22C05
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to Main Body ECU (Multiplex Network Body ECU)
      *c to No. 5 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F112-2 (CANH) - F112-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      F112-5 (CANH) - F112-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main line) B
      NG (No. 5 CAN junction connector main line) C

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

  22. CHECK FOR OPEN IN SUB BUS 1 LINES (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F111 No. 5 CAN junction connector.

    3. A002A22C09
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b to Multiplex Network Door ECU
      *c to No. 6 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F111-1 (CANH) - F111-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Multiplex network door ECU
      F111-5 (CANH) - F111-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (No. 6 CAN junction connector main line) B
      NG (Multiplex network door ECU main line) C

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - MULTIPLEX NETWORK DOOR ECU)

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


    1. Disconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. A0029SPC15
      *a

      Front view of wire harness connector

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

  24. CHECK FOR SHORT IN SUB BUS 1 LINES (MULTIPLEX NETWORK DOOR ECU)


    1. Reconnect the F18 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the X6 multiplex network door ECU connector.

    3. A002CCOC03
      *a

      Front view of wire harness connector

      (to Multiplex Network Door ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X6-13 (CANP) - X6-14 (CANN) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK DOOR ECU Click here

    NG

  25. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 6 CAN JUNCTION CONNECTOR)


    1. Reconnect the X6 multiplex network door ECU connector.

    2. Disconnect the F112 No. 6 CAN junction connector.

    3. A002A22C07
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)
      *b to Main Body ECU (Multiplex Network Body ECU)
      *c

      to Outer Mirror Control ECU Assembly (for Driver Side)

      (w/ Seat Position Memory System)
      *d

      to Position Control ECU and Switch Assembly

      (w/ Seat Position Memory System)
      *e to No. 5 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F112-2 (CANH) - F112-13 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      F112-3 (CANH) - F112-14 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Outer mirror control ECU assembly (for driver side)*
      F112-4 (CANH) - F112-15 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Position control ECU and switch assembly*
      F112-5 (CANH) - F112-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 5 CAN junction connector

      *: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main line) B
      NG (ECU or sensor branch line) C
      NG (No. 5 CAN junction connector main line) D

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

    GO TO STEP 27 Click here

    D

  26. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F111 No. 5 CAN junction connector.

    3. A002A22C08
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)
      *b

      to Multiplex Network Door ECU

      (w/ Power Back Door System)
      *c

      to Outer Mirror Control ECU Assembly (for Front Passenger Side)

      (w/ Seat Position Memory System)
      *d to No. 6 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      F111-1 (CANH) - F111-12 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω Multiplex network door ECU*1
      F111-4 (CANH) - F111-15 (CANL) Cable disconnected from negative (-) battery terminal 200 Ω or higher Outer mirror control ECU assembly (for front passenger side)*2
      F111-5 (CANH) - F111-16 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω No. 6 CAN junction connector

      • *1: w/ Power Back Door System

      • *2: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (No. 6 CAN junction connector main line) B
      NG (ECU or sensor branch line) C
      NG (Multiplex network door ECU main line) D

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - MULTIPLEX NETWORK DOOR ECU)

    C

  27. CHECK FOR SHORT IN SUB BUS 1 LINES (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A002BH7C01
      *a

      Component with harness connected

      (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
      F18-9 (CANP) - F18-10 (CANN) Cable disconnected from negative (-) 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 or sensor, there may be a short in the ECU or sensor.

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU SENSOR BUS LINES OR CONNECTOR

  28. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 6 CAN JUNCTION CONNECTOR)


    1. Disconnect the F112 No. 6 CAN junction connector.

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

      A0029QKC03
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 6 CAN Junction Connector)

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

      to Outer Mirror Control ECU Assembly (for Driver Side)

      (w/ Seat Position Memory System)

      		 *d

      to Position Control ECU and Switch Assembly

      (w/ Seat Position Memory System)
      *e to No. 5 CAN Junction Connector - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      F112-2 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Main body ECU (multiplex network body ECU)
      F112-13 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F112-3 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Outer mirror control ECU assembly (for driver side)*
      F112-14 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F112-4 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Position control ECU and switch assembly*
      F112-15 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F112-5 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 5 CAN junction connector
      F112-16 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F112-2 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Main body ECU (multiplex network body ECU)
      F112-13 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F112-3 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for driver side)*
      F112-14 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F112-4 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Position control ECU and switch assembly*
      F112-15 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F112-5 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 5 CAN junction connector
      F112-16 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      *: w/ Seat Position Memory System

      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 Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Main body ECU (multiplex network body ECU) main line) B
      NG (ECU or sensor bus line) C
      NG (No. 5 CAN junction connector main line) D

    A

    REPLACE NO. 6 CAN JUNCTION CONNECTOR

    C

    GO TO STEP 31 Click here

    D

    CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 5 CAN JUNCTION CONNECTOR) Click here

    B

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


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F18 main body ECU (multiplex network body ECU).

    3. A002AL9C05
      *1 DLC3
      *a

      Front view of wire harness connector

      (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
      F18-9 (CANP) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      F18-10 (CANN) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F18-9 (CANP) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      F18-10 (CANN) - F25-16 (BAT) Cable disconnected from negative (-) 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 Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

  30. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 5 CAN JUNCTION CONNECTOR)


    1. Reconnect the F112 No. 6 CAN junction connector.

    2. Disconnect the F111 No. 5 CAN junction connector.

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

      A0029QKC04
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 5 CAN Junction Connector)

      		 *b

      to Multiplex Network Door ECU

      (w/ Power Back Door System)
      *c

      to Outer Mirror Control ECU Assembly (for Front Passenger Side)

      (w/ Seat Position Memory System)

      		 *d to No. 6 CAN Junction Connector
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      F111-1 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Multiplex network door ECU*1
      F111-12 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F111-4 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short Outer mirror control ECU assembly (for front passenger side)*2
      F111-15 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F111-5 (CANH) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short No. 6 CAN junction connector
      F111-16 (CANL) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F111-1 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Multiplex network door ECU*1
      F111-12 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F111-4 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for front passenger side)*2
      F111-15 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      F111-5 (CANH) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 6 CAN junction connector
      F111-16 (CANL) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ Power Back Door System

      • *2: w/ Seat Position Memory System

      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 Purpose column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (No. 5 CAN junction connector main line) B
      NG (ECU or sensor branch line) C

    A

    REPLACE NO. 5 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

    C

  31. CHECK FOR SHORT IN SUB BUS 1 LINE (ECU, SENSOR)


    1. Reconnect all wire harness connectors.

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

      Click here

    3. A002AC7C09
      *1 DLC3
      *a

      Component with harness connected

      (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
      F18-9 (CANP) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANH ground short
      F18-10 (CANN) - F25-4 (CG) Cable disconnected from negative (-) battery terminal 200 Ω or higher Below 200 Ω: CANL ground short
      F18-9 (CANP) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      F18-10 (CANN) - F25-16 (BAT) Cable disconnected from negative (-) battery terminal 6 kΩ or higher Below 6 kΩ: CANH +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.

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

      Result
      Result
      OK
      NG

    OK

    REPLACE CORRESPONDING ECU OR SENSOR

    NG

    REPAIR OR REPLACE CORRESPONDING ECU SENSOR BUS LINES OR CONNECTOR