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 lines or connector

  • Short in sub bus 1 branch lines 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)

  • Front power seat switch LH

    (for LHD with Seat Position Memory System)

  • Front power seat switch RH

    (for RHD with Seat Position Memory System)

  • Multiplex tilt and telescopic ECU

    (w/ Power Tilt and Power Telescopic System)

  • No. 1 headlight ECU sub-assembly LH

  • Rear television camera assembly

    (w/ Parking Assist Monitor System without Parallel Parking Assist Function)

  • Open or short in No. 3 CAN junction connector (for LHD)

  • Open or short in No. 4 CAN junction connector (for RHD)

  • Open or short in No. 15 junction connector

  • Open or short in No. 21 CAN junction connector

  • Open or short in junction terminal

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

WIRING DIAGRAM

Figure 1. for LHD

B003Y84E01
B003Y3QE01

Figure 2. for RHD

B003YMXE01
B003Y2BE01

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 or any 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 33 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 as normal.

    Click here

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

Tech Tips


  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.

  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

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 (-) auxiliary battery terminal.

    2. B003YM5C01
      *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
      K1-9 (CANP) - K1-10 (CANN) 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 main bus lines
      K1-9 (CANP) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K1-10 (CANN) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K1-9 (CANP) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K1-10 (CANN) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      NG (Open circuit in CAN main bus lines) B
      NG (Short circuit between bus lines) C

      • NG (Short to ground)

      • NG (+B short)

      		 D

    B

    CHECK FOR OPEN IN SUB BUS 1 MAIN 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. 21 CAN JUNCTION CONNECTOR) Click here

    A

  3. CHECK FOR 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.


      Body Electrical > Main Body > Clear DTCs

    6. Turn the power switch off.

    7. Turn the power switch on (IG).

    8. Check for DTCs.


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to

      DTC U1002 is not output from the main body ECU (multiplex network body ECU)

      (GTS display: Main Body)

      		 A

      DTC U1002 is output from the 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 MAIN LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. B003XUDC05
      *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
      K1-9 (CANP) - K1-10 (CANN) Cable disconnected from negative (-) auxiliary 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 MAIN LINES (JUNCTION TERMINAL)


    1. Reconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the K106 junction terminal.

    3. B003YIVC09
      *a

      Front view of wire harness connector

      (to Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K106-3 (CANH) - K106-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE JUNCTION TERMINAL

    NG

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


    1. Reconnect the K106 junction terminal.

    2. Disconnect the K156 No. 21 CAN junction connector.

    3. B003XSXC08
      *a

      Front view of wire harness connector

      (to No. 21 CAN Junction Connector)
      *b to No. 15 Junction Connector
      *c 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 Connected to
      K156-8 (CANH) - K156-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K156-9 (CANH) - K156-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      Result
      Result Proceed to
      OK A
      NG (Line to main body ECU (multiplex network body ECU)) B
      NG (Line to No. 15 junction connector) C

    A

    REPLACE NO. 21 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 21 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

  7. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (NO. 15 JUNCTION CONNECTOR)


    1. Reconnect the K156 No. 21 CAN junction connector.

    2. Disconnect the Q60 No. 15 junction connector.

    3. B003XSXC09
      *a

      Front view of wire harness connector

      (to No. 15 Junction Connector)
      *b to No. 3 CAN Junction Connector
      *c to No. 21 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q60-9 (CANH) - Q60-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 3 CAN junction connector
      Q60-10 (CANH) - Q60-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 21 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Line to No. 21 CAN junction connector) B
      NG (Line to No. 3 CAN junction connector) C

    A

    REPLACE NO. 15 JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 21 CAN JUNCTION CONNECTOR)

    C

  8. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (NO. 3 CAN JUNCTION CONNECTOR)


    1. Reconnect the Q60 No. 15 junction connector.

    2. Disconnect the K111 No. 3 CAN junction connector.

    3. B003XSXC10
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Connector)
      *b to No. 15 Junction Connector
      *c to Junction Terminal

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K111-7 (CANH) - K111-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K111-11 (CANH) - K111-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Junction terminal
      Result
      Result Proceed to
      OK A
      NG (Line to No. 15 junction connector) B
      NG (Line to junction terminal) C

    A

    REPLACE NO. 3 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - JUNCTION TERMINAL)

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


    1. Disconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. B003XUDC06
      *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
      K1-9 (CANP) - K1-10 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

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

    NG

  10. CHECK FOR SHORT IN SUB BUS 1 LINES (JUNCTION TERMINAL)


    1. Reconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the K106 junction terminal.

    3. B003YIVC10
      *a

      Front view of wire harness connector

      (to Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K106-3 (CANH) - K106-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE JUNCTION TERMINAL

    NG

  11. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 21 CAN JUNCTION CONNECTOR)


    1. Reconnect the K106 junction terminal.

    2. Disconnect the K156 No. 21 CAN junction connector.

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

      B003Y6IC79
      *a

      Front view of wire harness connector

      (to No. 21 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c to Main Body ECU (Multiplex Network Body ECU) *d

      to Outer Mirror Control ECU Assembly (for Driver Side)

      (w/ Seat Position Memory System)
      *e to No. 1 Headlight ECU Sub-assembly LH - -
      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K156-8 (CANH) - K156-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K156-9 (CANH) - K156-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      K156-10 (CANH) - K156-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Outer mirror control ECU assembly (for driver side) *
      K156-11 (CANH) - K156-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher No. 1 headlight ECU sub-assembly LH

      • *: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (Line to main body ECU (multiplex network body ECU)) B
      NG (Line to ECU or sensor) C
      NG (Line to No. 15 junction connector) D

    A

    REPLACE NO. 21 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 21 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

    GO TO STEP 14 Click here

    D

  12. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 15 JUNCTION CONNECTOR)


    1. Reconnect the K156 No. 21 CAN junction connector.

    2. Disconnect the Q60 No. 15 junction connector.

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

      B003Y6IC73
      *a

      Front view of wire harness connector

      (to No. 15 Junction Connector)

      		 *b

      to Front Power Seat Switch LH

      (w/ Seat Position Memory System)
      *c to No. 3 CAN Junction Connector *d to No. 21 CAN Junction Connector
      *e

      to Rear Television Camera Assembly

      (w/ Parking Assist Monitor System without Parallel Parking Assist Function)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q60-8 (CANH) - Q60-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Front power seat switch LH*1
      Q60-9 (CANH) - Q60-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 3 CAN junction connector
      Q60-10 (CANH) - Q60-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 21 CAN junction connector
      Q60-11 (CANH) - Q60-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Rear television camera assembly*2

      • *1: w/ Seat Position Memory System

      • *2: w/ Parking Assist Monitor System without Parallel Parking Assist Function

      Result
      Result Proceed to
      OK A
      NG (Line to No. 21 CAN junction connector) B
      NG (Line to No. 3 CAN junction connector) C
      NG (Line to ECU or sensor) D

    A

    REPLACE NO. 15 JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 21 CAN JUNCTION CONNECTOR)

    D

    GO TO STEP 14 Click here

    C

  13. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 3 CAN JUNCTION CONNECTOR)


    1. Reconnect the Q60 No. 15 junction connector.

    2. Disconnect the K111 No. 3 CAN junction connector.

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

      B003Y6IC71
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c

      to Multiplex Tilt and Telescopic ECU

      (w/ Power Tilt and Power Telescopic System)

      		 *d

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

      (w/ Seat Position Memory System)
      *e to Junction Terminal - -
      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K111-7 (CANH) - K111-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K111-8 (CANH) - K111-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Multiplex tilt and telescopic ECU*1
      K111-10 (CANH) - K111-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Outer mirror control ECU assembly (for front passenger side)*2
      K111-11 (CANH) - K111-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Junction terminal

      • *1: w/ Power Tilt and Power Telescopic System

      • *2: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (Line to No. 15 junction connector) B
      NG (Line to ECU or sensor) C
      NG (Line to junction terminal) D

    A

    REPLACE NO. 3 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - JUNCTION TERMINAL)

    C

  14. CHECK FOR SHORT IN SUB BUS 1 LINES (ECU OR 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. B003XR7C05
      *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
      K1-9 (CANP) - K1-10 (CANN) 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 or sensor, there may be a short in the ECU or sensor.

      Result
      Result
      OK
      NG

    OK

    REPLACE ECU OR SENSOR

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  15. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 21 CAN JUNCTION CONNECTOR)


    1. Disconnect the K156 No. 21 CAN junction connector.

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

      B003XQZC90
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 21 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c to Main Body ECU (Multiplex Network Body ECU) *d

      to Outer Mirror Control ECU Assembly (for Driver Side)

      (w/ Seat Position Memory System)
      *e to No. 1 Headlight ECU Sub-assembly LH - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K156-8 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 15 junction connector
      K156-19 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-9 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Main body ECU (multiplex network body ECU)
      K156-20 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-10 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Outer mirror control ECU assembly (for driver side)*
      K156-21 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-11 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 1 headlight ECU sub-assembly LH
      K156-22 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-8 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 15 junction connector
      K156-19 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K156-9 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Main body ECU (multiplex network body ECU)
      K156-20 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K156-10 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for driver side)*
      K156-21 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K156-11 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 1 headlight ECU sub-assembly LH
      K156-22 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary 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 Result column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to main body ECU (multiplex network body ECU)) B
      NG (Line to ECU or sensor) C
      NG (Line to No. 15 junction connector) D

    A

    REPLACE NO. 21 CAN JUNCTION CONNECTOR

    C

    GO TO STEP 19 Click here

    D

    CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 15 JUNCTION CONNECTOR) Click here

    B

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


    1. Reconnect the K156 No. 21 CAN junction connector.

    2. Disconnect the K1 main body ECU (multiplex network body ECU) connector.

    3. B003XSQC01
      *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
      K1-9 (CANP) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K1-10 (CANN) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K1-9 (CANP) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K1-10 (CANN) - K9-16 (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 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. 21 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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


    1. Reconnect the K156 No. 21 CAN junction connector.

    2. Disconnect the Q60 No. 15 junction connector.

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

      B003XQZC96
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 15 Junction Connector)

      		 *b

      to Front Power Seat Switch LH

      (w/ Seat Position Memory System)
      *c to No. 3 CAN Junction Connector *d to No. 21 CAN Junction Connector
      *e

      to Rear Television Camera Assembly

      (w/ Parking Assist Monitor System without Parallel Parking Assist Function)

      		 - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      Q60-8 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Front power seat switch LH*1
      Q60-19 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      Q60-9 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 3 CAN junction connector
      Q60-20 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      Q60-10 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 21 CAN junction connector
      Q60-21 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      Q60-11 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Rear television camera assembly*2
      Q60-22 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      Q60-8 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front power seat switch LH*1
      Q60-19 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q60-9 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 3 CAN junction connector
      Q60-20 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q60-10 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 21 CAN junction connector
      Q60-21 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q60-11 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Rear television camera assembly*2
      Q60-22 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ Seat Position Memory System

      • *2: w/ Parking Assist Monitor System without Parallel Parking Assist Function

      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 Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to No. 21 CAN junction connector) B
      NG (Line to No. 3 CAN junction connector) C
      NG (Line to ECU or sensor) D

    A

    REPLACE NO. 15 JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 21 CAN JUNCTION CONNECTOR)

    D

    GO TO STEP 19 Click here

    C

  18. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 3 CAN JUNCTION CONNECTOR)


    1. Reconnect the Q60 No. 15 junction connector.

    2. Disconnect the K111 No. 3 CAN junction connector.

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

      B003XQZC92
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 3 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c

      to Multiplex Tilt and Telescopic ECU

      (w/ Power Tilt and Power Telescopic System)

      		 *d

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

      (w/ Seat Position Memory System)
      *e to Junction Terminal - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K111-7 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 15 junction connector
      K111-18 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K111-8 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Multiplex tilt and telescopic ECU*1
      K111-19 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K111-10 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Outer mirror control ECU assembly (for front passenger side)*2
      K111-21 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K111-11 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Junction terminal
      K111-22 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K111-7 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 15 junction connector
      K111-18 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K111-8 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Multiplex tilt and telescopic ECU*1
      K111-19 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K111-10 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for front passenger side)*2
      K111-21 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K111-11 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Junction terminal
      K111-22 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ Power Tilt and Power Telescopic 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 Result column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to No. 15 junction connector) B
      NG (Line to ECU or sensor) C
      NG (Line to junction terminal) D

    A

    REPLACE NO. 3 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 1 LINE (JUNCTION TERMINAL) Click here

    C

  19. CHECK FOR SHORT IN SUB BUS 1 LINE (ECU OR 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. B003YM5C02
      *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
      K1-9 (CANP) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K1-10 (CANN) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K1-9 (CANP) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K1-10 (CANN) - K9-16 (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 or sensor, there may be a short in the ECU or sensor.

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

      Result
      Result
      OK
      NG

    OK

    REPLACE ECU OR SENSOR

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  20. CHECK FOR SHORT IN SUB BUS 1 LINE (JUNCTION TERMINAL)


    1. Reconnect the K111 No. 3 CAN junction connector.

    2. Disconnect the K106 junction terminal.

    3. B003XZRC02
      *1 DLC3
      *a

      Front view of wire harness connector

      (to Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K106-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K106-2 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K106-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K106-2 (CANL) - K9-16 (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 Result column from the Check Sub Bus 1 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - JUNCTION TERMINAL)

  21. CHECK SUB BUS 1


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

    2. B003YM5C01
      *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
      K1-9 (CANP) - K1-10 (CANN) 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 main bus lines
      K1-9 (CANP) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K1-10 (CANN) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K1-9 (CANP) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K1-10 (CANN) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Result
      Result Proceed to
      OK A
      NG (Open circuit in CAN main bus lines) B
      NG (Short circuit between bus lines) C

      • NG (Short to ground)

      • NG (+B short)

      		 D

    B

    CHECK FOR OPEN IN SUB BUS 1 MAIN 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. 4 CAN JUNCTION CONNECTOR) Click here

    A

  22. CHECK FOR 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.


      Body Electrical > Main Body > Clear DTCs

    6. Turn the power switch off.

    7. Turn the power switch on (IG).

    8. Check for DTCs.


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to

      DTC U1002 is not output from the main body ECU (multiplex network body ECU)

      (GTS display: Main Body)

      		 A

      DTC U1002 is output from the 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

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


    1. Disconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. B003XUDC05
      *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
      K1-9 (CANP) - K1-10 (CANN) Cable disconnected from negative (-) auxiliary 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 OPEN IN SUB BUS 1 MAIN LINES (JUNCTION TERMINAL)


    1. Reconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the K106 junction terminal.

    3. B003YIVC09
      *a

      Front view of wire harness connector

      (to Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K106-3 (CANH) - K106-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE JUNCTION TERMINAL

    NG

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


    1. Reconnect the K106 junction terminal.

    2. Disconnect the K156 No. 21 CAN junction connector.

    3. B003XSXC08
      *a

      Front view of wire harness connector

      (to No. 21 CAN Junction Connector)
      *b to No. 15 Junction Connector
      *c 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 Connected to
      K156-8 (CANH) - K156-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K156-9 (CANH) - K156-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      Result
      Result Proceed to
      OK A
      NG (Line to main body ECU (multiplex network body ECU)) B
      NG (Line to No. 15 junction connector) C

    A

    REPLACE NO. 21 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 21 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

  26. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (NO. 15 JUNCTION CONNECTOR)


    1. Reconnect the K156 No. 21 CAN junction connector.

    2. Disconnect the Q60 No. 15 junction connector.

    3. B003XSXC09
      *a

      Front view of wire harness connector

      (to No. 15 Junction Connector)
      *b to No. 4 CAN Junction Connector
      *c to No. 21 CAN Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q60-9 (CANH) - Q60-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 4 CAN junction connector
      Q60-10 (CANH) - Q60-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 21 CAN junction connector
      Result
      Result Proceed to
      OK A
      NG (Line to No. 21 CAN junction connector) B
      NG (Line to No. 4 CAN junction connector) C

    A

    REPLACE NO. 15 JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 21 CAN JUNCTION CONNECTOR)

    C

  27. CHECK FOR OPEN IN SUB BUS 1 MAIN LINES (NO. 4 CAN JUNCTION CONNECTOR)


    1. Reconnect the Q60 No. 15 junction connector.

    2. Disconnect the K112 No. 4 CAN junction connector.

    3. B003XSXC11
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)
      *b to No. 15 Junction Connector
      *c to Junction Terminal

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K112-7 (CANH) - K112-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K112-11 (CANH) - K112-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Junction terminal
      Result
      Result Proceed to
      OK A
      NG (Line to No. 15 junction connector) B
      NG (Line to junction terminal) C

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR)

    C

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - JUNCTION TERMINAL)

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


    1. Disconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. B003XUDC06
      *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
      K1-9 (CANP) - K1-10 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

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

    NG

  29. CHECK FOR SHORT IN SUB BUS 1 LINES (JUNCTION TERMINAL)


    1. Reconnect the K1 main body ECU (multiplex network body ECU) connector.

    2. Disconnect the K106 junction terminal.

    3. B003YIVC10
      *a

      Front view of wire harness connector

      (to Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K106-3 (CANH) - K106-2 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE JUNCTION TERMINAL

    NG

  30. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 4 CAN JUNCTION CONNECTOR)


    1. Reconnect the K106 junction terminal.

    2. Disconnect the K112 No. 4 CAN junction connector.

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

      B003Y6IC84
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c

      to Multiplex Tilt and Telescopic ECU

      (w/ Power Tilt and Power Telescopic System)

      		 *d

      to Front Power Seat Switch RH

      (w/ Seat Position Memory System)
      *e

      to Outer Mirror Control ECU Assembly (for Driver side)

      (w/ Seat Position Memory System)

      		 *f to Junction Terminal
      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K112-7 (CANH) - K112-18 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K112-8 (CANH) - K112-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Multiplex tilt and telescopic ECU*1
      K112-9 (CANH) - K112-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Front power seat switch RH*2
      K112-10 (CANH) - K112-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Outer mirror control ECU assembly (for driver side) *2
      K112-11 (CANH) - K112-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Junction terminal

      • *1: w/ Power Tilt and Power Telescopic System

      • *2: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (Line to junction terminal) B
      NG (Line to ECU or sensor) C
      NG (Line to No. 15 junction connector) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - JUNCTION TERMINAL)

    C

    GO TO STEP 33 Click here

    D

  31. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 15 JUNCTION CONNECTOR)


    1. Reconnect the K112 No. 4 CAN junction connector.

    2. Disconnect the Q60 No. 15 junction connector.

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

      B003Y6IC78
      *a

      Front view of wire harness connector

      (to No. 15 Junction Connector)

      		 *b to No. 4 CAN Junction Connector
      *c to No. 21 CAN Junction Connector *d

      to Rear Television Camera Assembly

      (w/ Parking Assist Monitor System without Parallel Parking Assist Function)
      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      Q60-9 (CANH) - Q60-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 4 CAN junction connector
      Q60-10 (CANH) - Q60-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 21 CAN junction connector
      Q60-11 (CANH) - Q60-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Rear television camera assembly*

      • *: w/ Parking Assist Monitor System without Parallel Parking Assist Function

      Result
      Result Proceed to
      OK A
      NG (Line to No. 4 CAN junction connector) B
      NG (Line to No. 21 CAN junction connector) C
      NG (Line to ECU or sensor) D

    A

    REPLACE NO. 15 JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR)

    D

    GO TO STEP 33 Click here

    C

  32. CHECK FOR SHORT IN SUB BUS 1 LINES (NO. 21 CAN JUNCTION CONNECTOR)


    1. Reconnect the Q60 No. 15 junction connector.

    2. Disconnect the K156 No. 21 CAN junction connector.

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

      B003Y6IC79
      *a

      Front view of wire harness connector

      (to No. 21 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c to Main Body ECU (Multiplex Network Body ECU) *d

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

      (w/ Seat Position Memory System)
      *e to No. 1 Headlight ECU Sub-assembly LH - -
      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K156-8 (CANH) - K156-19 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω No. 15 junction connector
      K156-9 (CANH) - K156-20 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Main body ECU (multiplex network body ECU)
      K156-10 (CANH) - K156-21 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Outer mirror control ECU assembly (for front passenger side)*
      K156-11 (CANH) - K156-22 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher No. 1 headlight ECU sub-assembly LH

      • *: w/ Seat Position Memory System

      Result
      Result Proceed to
      OK A
      NG (Line to No. 15 junction connector) B
      NG (Line to ECU or sensor) C
      NG (Line to main body ECU (multiplex network body ECU)) D

    A

    REPLACE NO. 21 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 21 CAN JUNCTION CONNECTOR)

    D

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 21 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

    C

  33. CHECK FOR SHORT IN SUB BUS 1 LINES (ECU OR 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. B003XR7C05
      *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
      K1-9 (CANP) - K1-10 (CANN) 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 or sensor, there may be a short in the ECU or sensor.

      Result
      Result
      OK
      NG

    OK

    REPLACE ECU OR SENSOR

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  34. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 4 CAN JUNCTION CONNECTOR)


    1. Disconnect the K112 No. 4 CAN junction connector.

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

      B003XQZC93
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c

      to Multiplex Tilt and Telescopic ECU

      (w/ Power Tilt and Power Telescopic System)

      		 *d

      to Front Power Seat Switch RH

      (w/ Seat Position Memory System)
      *e

      to Outer Mirror Control ECU Assembly (for Driver Side)

      (w/ Seat Position Memory System)

      		 *f to Junction Terminal
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K112-7 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 15 junction connector
      K112-18 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-8 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Multiplex tilt and telescopic ECU*1
      K112-19 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-9 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Front power seat switch RH*2
      K112-20 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-10 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Outer mirror control ECU assembly (for driver side)*2
      K112-21 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-11 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Junction terminal
      K112-22 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-7 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 15 junction connector
      K112-18 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-8 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Multiplex tilt and telescopic ECU*1
      K112-19 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-9 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Front power seat switch RH*2
      K112-20 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-10 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for driver side)*2
      K112-21 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-11 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Junction terminal
      K112-22 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *1: w/ Power Tilt and Power Telescopic 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 Result column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to junction terminal) B
      NG (Line to ECU or sensor) C
      NG (Line to No. 15 junction connector) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    C

    GO TO STEP 38 Click here

    D

    CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 15 JUNCTION CONNECTOR) Click here

    B

  35. CHECK FOR SHORT IN SUB BUS 1 LINE (JUNCTION TERMINAL)


    1. Reconnect the K112 No. 4 CAN junction connector.

    2. Disconnect the K106 junction terminal.

    3. B003XZRC02
      *1 DLC3
      *a

      Front view of wire harness connector

      (to Junction Terminal)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K106-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K106-2 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K106-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K106-2 (CANL) - K9-16 (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 Result column from the Check Sub Bus 1 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE JUNCTION TERMINAL

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - JUNCTION TERMINAL)

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


    1. Reconnect the K112 No. 4 CAN junction connector.

    2. Disconnect the Q60 No. 15 junction connector.

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

      B003XQZC91
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 15 Junction Connector)

      		 *b to No. 4 CAN Junction Connector
      *c to No. 21 CAN Junction Connector *d

      to Rear Television Camera Assembly

      (w/ Parking Assist Monitor System without Parallel Parking Assist Function)
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      Q60-9 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 4 CAN junction connector
      Q60-20 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      Q60-10 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 21 CAN junction connector
      Q60-21 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      Q60-11 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Rear television camera assembly*
      Q60-22 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      Q60-9 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 4 CAN junction connector
      Q60-20 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q60-10 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 21 CAN junction connector
      Q60-21 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      Q60-11 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Rear television camera assembly*
      Q60-22 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      • *: w/ Parking Assist Monitor System without Parallel Parking Assist Function

      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 Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to No. 4 CAN junction connector) B
      NG (Line to No. 21 CAN junction connector) C
      NG (Line to ECU or sensor) D

    A

    REPLACE NO. 15 JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 15 JUNCTION CONNECTOR)

    D

    GO TO STEP 38 Click here

    C

  37. CHECK FOR SHORT IN SUB BUS 1 LINE (NO. 21 CAN JUNCTION CONNECTOR)


    1. Reconnect the Q60 No. 15 junction connector.

    2. Disconnect the K156 No. 21 CAN junction connector.

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

      B003XQZC90
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 21 CAN Junction Connector)

      		 *b to No. 15 Junction Connector
      *c to Main Body ECU (Multiplex Network Body ECU) *d

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

      (w/ Seat Position Memory System)
      *e to No. 1 Headlight ECU Sub-assembly LH - -
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K156-8 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 15 junction connector
      K156-19 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-9 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Main body ECU (multiplex network body ECU)
      K156-20 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-10 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Outer mirror control ECU assembly (for front passenger side)*
      K156-21 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-11 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground No. 1 headlight ECU sub-assembly LH
      K156-22 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K156-8 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 15 junction connector
      K156-19 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K156-9 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Main body ECU (multiplex network body ECU)
      K156-20 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K156-10 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Outer mirror control ECU assembly (for front passenger side)*
      K156-21 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K156-11 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short No. 1 headlight ECU sub-assembly LH
      K156-22 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary 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 Result column that matches the result in the Result column from the Check Sub Bus 1 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to No. 15 junction connector) B
      NG (Line to ECU or sensor) C
      NG (Line to main body ECU (multiplex network body ECU)) D

    A

    REPLACE NO. 21 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 15 JUNCTION CONNECTOR - NO. 21 CAN JUNCTION CONNECTOR)

    D

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

    C

  38. CHECK FOR SHORT IN SUB BUS 1 LINE (ECU OR 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. B003YM5C02
      *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
      K1-9 (CANP) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K1-10 (CANN) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K1-9 (CANP) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K1-10 (CANN) - K9-16 (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 or sensor, there may be a short in the ECU or sensor.

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

      Result
      Result
      OK
      NG

    OK

    REPLACE ECU OR SENSOR

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    1. Reconnect the K156 No. 21 CAN junction connector.

    2. Disconnect the K1 main body ECU (multiplex network body ECU) connector.

    3. B003XSQC01
      *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
      K1-9 (CANP) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K1-10 (CANN) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K1-9 (CANP) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K1-10 (CANN) - K9-16 (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 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. 21 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))