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

DTC Code DTC Name
U1002 Lost Communication with Gateway Module (Power Management2)

DESCRIPTION


DTC No. DTC Detection Condition Trouble Area
U1002 Power management control ECU cannot receive signals from all ECUs that have been memorized as those connected to sub bus 12.

  • Open or short in sub bus 12 main line or connector

  • Open or short in sub bus 12 branch line or connector

  • Power management control ECU

  • ECM

  • Air conditioning amplifier assembly

  • Brake booster with master cylinder assembly (Skid control ECU)

  • CAN No. 1 junction connector

  • CAN No. 5 junction connector

Tech Tips

This diagnosis procedure is for when DTC U1002 is output by the power management control ECU (GTS display: PM2 Gateway).

WIRING DIAGRAM

B005XXOE04

CAUTION / NOTICE / HINT

Note


  • Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work Click here.

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

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

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

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

Tech Tips


  • Operating the power switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

  • Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE


  1. CHECK SUB BUS 12


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

    2. B005XZWE02
      Text in Illustration
      *a

      Component with harness connector

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      L6-31 (CA3P) - L6-30 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω

      Below 54 Ω:

      Short circuit between bus lines

      70 Ω or higher:

      Open circuit in a main bus line
      L6-31 (CA3P) - L6-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short
      L6-30 (CA3N) - L6-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      L6-31 (CA3P) - L6-7 (AM21) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short
      L6-30 (CA3N) - L6-7 (AM21) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANL +B short

      Tech Tips

      When the value is as specified, clear and recheck for DTCs. When no DTCs are output, check for malfunctions such as damage or improper connection of the relevant connectors.

      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

    A

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    CHECK FOR SHORT IN SUB BUS 12 LINES (POWER MANAGEMENT CONTROL ECU) Click here

    D

    CHECK FOR SHORT IN SUB BUS 12 LINE (POWER MANAGEMENT CONTROL ECU) Click here

    B

  2. CHECK FOR OPEN IN SUB BUS 12 LINES (POWER MANAGEMENT CONTROL ECU)


    1. B005YU6E03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L6-31 (CA3P) - L6-30 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

  3. CHECK FOR OPEN IN SUB BUS 12 LINES (CAN NO. 5 J/C - CAN NO. 1 J/C)


    1. Reconnect the power management control ECU connector.

    2. Disconnect the wire harness connector from the CAN No. 5 junction connector (instrument panel connector holder left side).

    3. B005XNYE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *b to CAN No. 1 Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L101-2 (CANH) - L101-4 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    NG

    CHECK FOR OPEN IN SUB BUS 12 LINES (CAN NO. 1 J/C - CAN NO. 5 J/C) Click here

    OK

  4. CHECK FOR OPEN IN SUB BUS 12 LINES (CAN NO. 5 J/C - POWER MANAGEMENT CONTROL ECU)


    1. Reconnect the wire harness connector to the CAN No. 5 junction connector (instrument panel connector holder left side).

    2. Disconnect the wire harness connector from the CAN No. 5 junction connector (instrument panel connector holder right side).

    3. B005XKAE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *b to Power Management Control ECU

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L102-5 (CANH) - L102-3 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 5 J/C - POWER MANAGEMENT CONTROL ECU)

  5. CHECK FOR OPEN IN SUB BUS 12 LINES (CAN NO. 1 J/C - CAN NO. 5 J/C)


    1. Reconnect the wire harness connector to the CAN No. 5 junction connector (instrument panel connector holder left side).

    2. Disconnect the wire harness connector from the CAN No. 1 junction connector (instrument panel wire side).

    3. B005Z9KE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 1 Junction Connector)
      *b to CAN No. 5 Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L132-3 (CANH) - L132-9 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - CAN NO. 5 J/C)

    OK

  6. CHECK FOR OPEN IN SUB BUS 12 LINES (CAN NO. 1 J/C - ECM)


    1. Reconnect the wire harness connector to the CAN No. 1 junction connector (instrument panel wire side).

    2. Disconnect the wire harness connector from the CAN No. 1 junction connector (engine room main wire side).

    3. B005XRSE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 1 Junction Connector)
      *b to ECM

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A67-4 (CANH) - A67-10 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK

    REPLACE CAN NO. 1 JUNCTION CONNECTOR

    NG

  7. CHECK FOR OPEN IN SUB BUS 12 LINES (ECM)


    1. Reconnect the wire harness connector to the CAN No. 1 junction connector (engine room main wire side).

    2. B005ZBFE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A57-12 (CANP) - A57-4 (CANN) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - ECM)

  8. CHECK FOR SHORT IN SUB BUS 12 LINES (POWER MANAGEMENT CONTROL ECU)


    1. B005YU6E03
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the power management control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L6-31 (CA3P) - L6-30 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

  9. CHECK FOR SHORT IN SUB BUS 12 LINES (CAN NO. 5 J/C - POWER MANAGEMENT CONTROL ECU)


    1. Reconnect the power management control ECU connector.

    2. Disconnect the wire harness connector from the CAN No. 5 junction connector (instrument panel connector holder right side).

    3. B005XKAE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *b to Power Management Control ECU

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L102-5 (CANH) - L102-3 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 5 J/C - POWER MANAGEMENT CONTROL ECU)

    OK

  10. CHECK FOR SHORT IN SUB BUS 12 LINES (CAN NO. 5 J/C)


    1. Disconnect the wire harness connector from the CAN No. 5 junction connector (instrument panel connector holder left side).

    2. B005Y8BE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)
      *b to Air Conditioning Amplifier Assembly
      *c to CAN No. 1 Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L101-1 (CANH) - L101-3 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      L101-2 (CANH) - L101-4 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result Proceed to
      OK A
      NG (CAN No. 1 Junction connector main line) B
      NG (ECU branch line) C

    A

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

    C

    CHECK FOR SHORT IN SUB BUS 12 LINES (ECUS) Click here

    B

  11. CHECK FOR SHORT IN SUB BUS 12 LINES (CAN NO. 1 J/C - CAN NO. 5 J/C)


    1. Disconnect the wire harness connector from the CAN No. 1 junction connector (instrument panel wire side).

    2. B005YXGE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 1 Junction Connector)
      *b to CAN No. 5 Junction Connector

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L132-3 (CANH) - L132-9 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 1 MΩ or higher

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - CAN NO. 5 J/C)

    OK

  12. CHECK FOR SHORT IN SUB BUS 12 LINES (CAN NO. 1 J/C)


    1. Disconnect the wire harness connector from the CAN No. 1 junction connector (engine room main wire side).

    2. B005ZD6E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to CAN No. 1 Junction Connector)
      *b to Brake booster with master cylinder assembly (Skid control ECU)
      *c to ECM

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A67-3 (CANH) - A67-9 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher
      A67-4 (CANH) - A67-10 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω

    OK

    REPLACE CAN NO. 1 JUNCTION CONNECTOR

    NG

  13. CHECK FOR SHORT IN SUB BUS 12 LINES (ECUS)


    1. Reconnect all wire harness connectors (CAN No. 1 junction connector and CAN No. 5 junction connector).

    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. B005Y5UE02
      Text in Illustration
      *a

      Component with harness connector

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L6-31 (CA3P) - L6-30 (CA3N) 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).

      • If the resistance does not become normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), repair or replace the short circuited branch line or connector.


    OK

    REPLACE CORRESPONDING ECU

    NG

    REPAIR OR REPLACE CORRESPONDING ECU WIRE

  14. CHECK FOR SHORT IN SUB BUS 12 LINE (POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the power management control ECU connector.

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

      B005Z0ME02
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      L6-31 (CA3P) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short CAN No. 5 junction connector
      L6-30 (CA3N) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      L6-31 (CA3P) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short
      L6-30 (CA3N) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      Text in Illustration
      *1 DLC3 - -
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      		 - -

      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 12 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 12 inspection.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

  15. CHECK FOR SHORT IN SUB BUS 12 LINE (CAN NO. 5 J/C - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the wire harness connector from the CAN No. 5 junction connector (instrument panel connector holder right side).

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

      B005YYDE02
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      L102-5 (CANH) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short Power management control ECU
      L102-3 (CANL) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      L102-5 (CANH) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short
      L102-3 (CANL) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      Text in Illustration
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)

      		 *b to Power management control ECU

      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 12 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 12 inspection.


    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 5 J/C - POWER MANAGEMENT CONTROL ECU)

    OK

  16. CHECK FOR SHORT IN SUB BUS 12 LINE (CAN NO. 5 J/C)


    1. Disconnect the wire harness connector from the CAN No. 5 junction connector (instrument panel connector holder left side).

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

      B005YT3E02
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      L101-1 (CANH) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short Air conditioning amplifier assembly
      L101-3 (CANL) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      L101-2 (CANH) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short CAN No. 1 junction connector
      L101-4 (CANL) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      L101-1 (CANH) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short Air conditioning amplifier assembly
      L101-3 (CANL) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      L101-2 (CANH) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short CAN No. 1 junction connector
      L101-4 (CANL) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      Text in Illustration
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to CAN No. 5 Junction Connector)

      		 *b to Air conditioning amplifier assembly
      *c to CAN No. 1 Junction Connector - -
      Result
      Result Proceed to
      OK A
      NG (CAN No. 1 Junction connector main line) B
      NG (ECU branch line) C

      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 12 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 12 inspection.


    A

    REPLACE CAN NO. 5 JUNCTION CONNECTOR

    C

    CHECK SUB BUS 12 LINE (ECU) Click here

    B

  17. CHECK FOR SHORT IN SUB BUS 12 LINE (CAN NO. 1 J/C - CAN NO. 5 J/C)


    1. Disconnect the wire harness connector from the CAN No. 1 junction connector (instrument panel wire side).

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

      B005YBJE02
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      L132-3 (CANH) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short CAN No. 5 junction connector
      L132-9 (CANL) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      L132-3 (CANH) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short CAN No. 5 junction connector
      L132-9 (CANL) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for 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 12 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 12 inspection.

      Text in Illustration
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to CAN No. 1 Junction Connector)

      		 *b to CAN No. 5 Junction Connector

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - CAN NO. 5 J/C)

    OK

  18. CHECK SHORT IN SUB BUS 12 LINE (CAN NO. 1 J/C)


    1. Disconnect the wire harness connector from the CAN No. 1 junction connector (engine room main wire side).

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

      B005Y96E02
      Standard Resistance
      Tester Connection Condition Specified Condition Purpose Connected to
      A67-3 (CANH) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short Brake booster with master cylinder assembly (skid control ECU)
      A67-9 (CANL) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      A67-4 (CANH) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANH ground short ECM
      A67-10 (CANL) - L61-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Inspection for CANL ground short
      A67-3 (CANH) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short Brake booster with master cylinder assembly (skid control ECU)
      A67-9 (CANL) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      A67-4 (CANH) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANH +B short ECM
      A67-10 (CANL) - L61-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Inspection for CANL +B short
      Text in Illustration
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to CAN No. 1 Junction Connector)

      		 *b to Brake booster with master cylinder assembly (Skid control ECU)
      *c to ECM - -

      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 12 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 12 inspection.


    OK

    REPLACE CAN NO. 1 JUNCTION CONNECTOR

    NG

  19. CHECK SUB BUS 12 LINE (ECU)


    1. Reconnect all wire harness connectors (CAN No. 1 junction connector and CAN No. 5 junction connector).

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

    3. B005XZWE02
      Text in Illustration
      *a

      Component with harness connector

      (Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Purpose
      L6-31 (CA3P) - L6-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANH ground short
      L6-30 (CA3N) - L6-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher

      Below 200 Ω:

      CANL ground short
      L6-31 (CA3P) - L6-7 (AM21) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher

      Below 6 kΩ:

      CANH +B short
      L6-30 (CA3N) - L6-7 (AM21) 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 12 inspection.

      • Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check Sub Bus 12 inspection.


    OK

    REPLACE CORRESPONDING ECU

    NG

    REPAIR OR REPLACE CORRESPONDING ECU WIRE