CAN COMMUNICATION SYSTEM, Diagnostic DTC:U0100, U0129, U0293

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0129 Lost Communication with Brake System Control Module
U0293 Lost Communication with Hybrid Vehicle Control System

DESCRIPTION


DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0100 Lost Communication with ECM / PCM "A" The hybrid vehicle control ECU assembly does not receive data from the ECM.

  • Open or short in sub bus 15 main line or connector

  • Open or short in sub bus 15 branch line or connector

  • Power source circuit of hybrid vehicle control ECU assembly

  • Hybrid vehicle control ECU assembly

  • Power source circuit of ECM

  • ECM

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

  • Open or short in No. 8 CAN junction connector (for LHD)

Tech Tips

As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.
U0129 Lost Communication with Brake System Control Module The hybrid vehicle control ECU assembly does not receive data from the skid control ECU assembly.

  • Open or short in sub bus 15 main line or connector

  • Open or short in sub bus 15 branch line or connector

  • Power source circuit of hybrid vehicle control ECU assembly

  • Hybrid vehicle control ECU assembly

  • Power source circuit of skid control ECU assembly

  • Skid control ECU assembly

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

  • Open or short in No. 8 CAN junction connector (for LHD)

Tech Tips

As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.
U0293 Lost Communication with Hybrid Vehicle Control System

  • The ECM does not receive data from the hybrid vehicle control ECU assembly.

  • The skid control ECU assembly does not receive data from the hybrid vehicle control ECU assembly.

  • Open or short in sub bus 15 main line or connector

  • Open or short in sub bus 15 branch line or connector

  • Power source circuit of ECM

  • ECM

  • Power source circuit of hybrid vehicle control ECU assembly

  • Hybrid vehicle control ECU assembly

  • Power source circuit of skid control ECU assembly

  • Skid control ECU assembly

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

  • Open or short in No. 8 CAN junction connector (for LHD)

Tech Tips

As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.

Tech Tips

This diagnostic procedure is for when DTC U0100, U0129 and U0293 are output at the same time.

WIRING DIAGRAM

Figure 1. for LHD

B003XNSE02
*a Skid Control ECU Assembly
*b Hybrid Vehicle Control ECU Assembly
*c No. 8 CAN Junction Connector

Figure 2. for RHD

B003XNSE04
*a Skid Control ECU Assembly
*b Hybrid Vehicle Control ECU Assembly
*c No. 4 CAN Junction Connector

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 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

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

    RECONFIRM DTC OUTPUT Click here

    A

  2. RECONFIRM DTC OUTPUT


    1. Reconfirm DTCs.


      Powertrain > Hybrid Control > Trouble Codes

      Tech Tips

      If the hybrid vehicle control ECU assembly outputs only DTC U0129, troubleshoot DTC U0129 and check the branch circuit of sub bus 15.

      Result
      Result Proceed to

      The hybrid vehicle control ECU assembly outputs DTC U0129 and other DTCs.

      (GTS display: Hybrid Control)

      		 A

      The hybrid vehicle control ECU assembly outputs only DTC U0129.

      (GTS display: Hybrid Control)

      		 B

    B

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    A

  3. CHECK SUB BUS 15


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

    2. B003YBYC64
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K142-31 (CA3P) - K142-30 (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 main bus lines
      K142-31 (CA3P) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K142-30 (CA3N) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K142-31 (CA3P) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K142-30 (CA3N) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • When the values are 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.

      • If DTCs are output although the bus circuit is normal and DTCs were cleared, replace the hybrid vehicle control ECU assembly.

      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

    A

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    C

    CHECK FOR SHORT IN SUB BUS 15 LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY) Click here

    D

    CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 8 CAN JUNCTION CONNECTOR) Click here

    B

  4. CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the K142 hybrid vehicle control ECU assembly connector.

    2. B003YCZC66
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K142-31 (CA3P) - K142-30 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  5. CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (NO. 8 CAN JUNCTION CONNECTOR)


    1. Reconnect the K142 hybrid vehicle control ECU assembly connector.

    2. Disconnect the K116 No. 8 CAN junction connector.

    3. B003XSXC01
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)
      *b to Hybrid Vehicle Control ECU Assembly
      *c to ECM

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K116-1 (CANH) - K116-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly
      K116-3 (CANH) - K116-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω ECM
      Result
      Result Proceed to
      OK A
      NG (Line to hybrid vehicle control ECU assembly) B
      NG (Line to ECM) C

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

    C

  6. CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (ECM)


    1. Reconnect the K116 No. 8 CAN junction connector.

    2. Disconnect the F5 ECM connector.

    3. B003Y60C02
      *a

      Front view of wire harness connector

      (to ECM)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F5-61 (CAN+) - F5-62 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 8 CAN JUNCTION CONNECTOR)

  7. CHECK FOR SHORT IN SUB BUS 15 LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the K142 hybrid vehicle control ECU assembly connector.

    2. B003YCZC66
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K142-31 (CA3P) - K142-30 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  8. CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 8 CAN JUNCTION CONNECTOR)


    1. Reconnect the K142 hybrid vehicle control ECU assembly connector.

    2. Disconnect the K116 No. 8 CAN junction connector.

    3. B003XSXC02
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)
      *b to Hybrid Vehicle Control ECU Assembly
      *c to Skid Control ECU Assembly
      *d to ECM

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K116-1 (CANH) - K116-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly
      K116-2 (CANH) - K116-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Skid control ECU assembly
      K116-3 (CANH) - K116-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω ECM
      Result
      Result Proceed to
      OK A
      NG (Line to hybrid vehicle control ECU assembly) B
      NG (Line to ECM) C
      NG (Line to skid control ECU assembly) D

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY) Click here

    C

  9. CHECK FOR SHORT IN SUB BUS 15 LINES (ECM)


    1. Reconnect the K116 No. 8 CAN junction connector.

    2. Disconnect the F5 ECM connector.

    3. B003Y60C02
      *a

      Front view of wire harness connector

      (to ECM)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F5-61 (CAN+) - F5-62 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 8 CAN JUNCTION CONNECTOR)

  10. CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY)


    1. Reconnect the K116 No. 8 CAN junction connector.

    2. Disconnect the A25 skid control ECU assembly connector.

    3. B003Y0LC04
      *a

      Front view of wire harness connector

      (to Skid Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A25-9 (CANH) - A25-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

  11. CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 8 CAN JUNCTION CONNECTOR)


    1. Disconnect the K116 No. 8 CAN junction connector.

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

      B003XQZC80
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 8 CAN Junction Connector)

      		 *b to Hybrid Vehicle Control ECU Assembly
      *c to Skid Control ECU Assembly *d to ECM
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K116-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Hybrid vehicle control ECU assembly
      K116-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K116-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Skid control ECU assembly
      K116-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K116-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground ECM
      K116-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K116-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Hybrid vehicle control ECU assembly
      K116-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K116-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Skid control ECU assembly
      K116-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K116-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short ECM
      K116-14 (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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to hybrid vehicle control ECU assembly) B
      NG (Line to ECM) C
      NG (Line to skid control ECU assembly) D

    A

    REPLACE NO. 8 CAN JUNCTION CONNECTOR

    C

    CHECK FOR SHORT IN SUB BUS 15 LINE (ECM) Click here

    D

    CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY) Click here

    B

  12. CHECK FOR SHORT IN SUB BUS 15 LINE (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the K142 hybrid vehicle control ECU assembly connector.

    2. B003YCZC67
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Result Specified Condition
      K142-31 (CA3P) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANH short to ground 200 Ω or higher
      K142-30 (CA3N) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANL short to ground
      K142-31 (CA3P) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal Below 6 kΩ: CANH +B short 6 kΩ or higher
      K142-30 (CA3N) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

  13. CHECK FOR SHORT IN SUB BUS 15 LINE (ECM)


    1. Disconnect the A78 and F5 ECM connectors.

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

      B003XZSC33
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -
      Standard Resistance
      Tester Connection Condition Result Specified Condition
      F5-61 (CAN+) - F5-16 (E1) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANH short to ground 200 Ω or higher
      F5-62 (CAN-) - F5-16 (E1) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANL short to ground
      F5-61 (CAN+) - A78-1 (BATT) Cable disconnected from negative (-) auxiliary battery terminal Below 6 kΩ: CANH +B short 6 kΩ or higher
      F5-62 (CAN-) - A78-1 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - NO. 8 CAN JUNCTION CONNECTOR)

  14. CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY)


    1. Disconnect the A25 skid control ECU assembly connector.

    2. B003Y0LC05
      *a

      Front view of wire harness connector

      (to Skid Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Result Specified Condition
      A25-9 (CANH) - A25-1 (GND4) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANH short to ground 200 Ω or higher
      A25-8 (CANL) - A25-1 (GND4) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANL short to ground
      A25-9 (CANH) - A25-38 (+BI2) Cable disconnected from negative (-) auxiliary battery terminal Below 6 kΩ: CANH +B short 6 kΩ or higher
      A25-8 (CANL) - A25-38 (+BI2) Cable disconnected from negative (-) auxiliary battery terminal 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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 8 CAN JUNCTION CONNECTOR)

  15. RECONFIRM DTC OUTPUT


    1. Reconfirm DTCs.


      Powertrain > Hybrid Control > Trouble Codes

      Tech Tips

      If the hybrid vehicle control ECU assembly outputs only DTC U0129, troubleshoot DTC U0129 and check the branch circuit of sub bus 15.

      Result
      Result Proceed to

      The hybrid vehicle control ECU assembly outputs DTC U0129 and other DTCs.

      (GTS display: Hybrid Control)

      		 A

      The hybrid vehicle control ECU assembly outputs only DTC U0129.

      (GTS display: Hybrid Control)

      		 B

    B

    GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here

    A

  16. CHECK SUB BUS 15


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

    2. B003YBYC64
      *a

      Component with harness connected

      (Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition Result
      K142-31 (CA3P) - K142-30 (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 main bus lines
      K142-31 (CA3P) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground
      K142-30 (CA3N) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K142-31 (CA3P) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short
      K142-30 (CA3N) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short

      Tech Tips


      • When the values are 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.

      • If DTCs are output although the bus circuit is normal and DTCs were cleared, replace the hybrid vehicle control ECU assembly.

      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

    A

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    C

    CHECK FOR SHORT IN SUB BUS 15 LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY) Click here

    D

    CHECK FOR SHORT IN SUB BUS 15 LINE (NO. 4 CAN JUNCTION CONNECTOR) Click here

    B

  17. CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the K142 hybrid vehicle control ECU assembly connector.

    2. B003YCZC66
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K142-31 (CA3P) - K142-30 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  18. CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (NO. 4 CAN JUNCTION CONNECTOR)


    1. Reconnect the K142 hybrid vehicle control ECU assembly connector.

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

    3. B003XSXC03
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)
      *b to Hybrid Vehicle Control ECU Assembly
      *c to ECM

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K112-1 (CANH) - K112-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly
      K112-3 (CANH) - K112-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω ECM
      Result
      Result Proceed to
      OK A
      NG (Line to hybrid vehicle control ECU assembly) B
      NG (Line to ECM) C

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)

    C

  19. CHECK FOR OPEN IN SUB BUS 15 MAIN LINES (ECM)


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

    2. Disconnect the F5 ECM connector.

    3. B003Y60C02
      *a

      Front view of wire harness connector

      (to ECM)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F5-61 (CAN+) - F5-62 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

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

  20. CHECK FOR SHORT IN SUB BUS 15 LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the K142 hybrid vehicle control ECU assembly connector.

    2. B003YCZC66
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K142-31 (CA3P) - K142-30 (CA3N) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

  21. CHECK FOR SHORT IN SUB BUS 15 LINES (NO. 4 CAN JUNCTION CONNECTOR)


    1. Reconnect the K142 hybrid vehicle control ECU assembly connector.

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

    3. B003XSXC04
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)
      *b to Hybrid Vehicle Control ECU Assembly
      *c to Skid Control ECU Assembly
      *d to ECM

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

      Standard Resistance
      Tester Connection Condition Specified Condition Connected to
      K112-1 (CANH) - K112-12 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω Hybrid vehicle control ECU assembly
      K112-2 (CANH) - K112-13 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Skid control ECU assembly
      K112-3 (CANH) - K112-14 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω ECM
      Result
      Result Proceed to
      OK A
      NG (Line to hybrid vehicle control ECU assembly) B
      NG (Line to ECM) C
      NG (Line to skid control ECU assembly) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    B

    REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)

    D

    CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY) Click here

    C

  22. CHECK FOR SHORT IN SUB BUS 15 LINES (ECM)


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

    2. Disconnect the F5 ECM connector.

    3. B003Y60C02
      *a

      Front view of wire harness connector

      (to ECM)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F5-61 (CAN+) - F5-62 (CAN-) Cable disconnected from negative (-) auxiliary battery terminal 108 to 132 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

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

  23. CHECK FOR SHORT IN SUB BUS 15 LINES (SKID CONTROL ECU ASSEMBLY)


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

    2. Disconnect the A25 skid control ECU assembly connector.

    3. B003Y0LC04
      *a

      Front view of wire harness connector

      (to Skid Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A25-9 (CANH) - A25-8 (CANL) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)

  24. CHECK FOR SHORT IN SUB BUS 15 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.

      B003XQZC81
      *1 DLC3 - -
      *a

      Front view of wire harness connector

      (to No. 4 CAN Junction Connector)

      		 *b to Hybrid Vehicle Control ECU Assembly
      *c to Skid Control ECU Assembly *d to ECM
      Standard Resistance
      Tester Connection Condition Specified Condition Result Connected to
      K112-1 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Hybrid vehicle control ECU assembly
      K112-12 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-2 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground Skid control ECU assembly
      K112-13 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-3 (CANH) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANH short to ground ECM
      K112-14 (CANL) - K9-4 (CG) Cable disconnected from negative (-) auxiliary battery terminal 200 Ω or higher Below 200 Ω: CANL short to ground
      K112-1 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Hybrid vehicle control ECU assembly
      K112-12 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-2 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short Skid control ECU assembly
      K112-13 (CANL) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANL +B short
      K112-3 (CANH) - K9-16 (BAT) Cable disconnected from negative (-) auxiliary battery terminal 6 kΩ or higher Below 6 kΩ: CANH +B short ECM
      K112-14 (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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result Proceed to
      OK A
      NG (Line to hybrid vehicle control ECU assembly) B
      NG (Line to ECM) C
      NG (Line to skid control ECU assembly) D

    A

    REPLACE NO. 4 CAN JUNCTION CONNECTOR

    C

    CHECK FOR SHORT IN SUB BUS 15 LINE (ECM) Click here

    D

    CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY) Click here

    B

  25. CHECK FOR SHORT IN SUB BUS 15 LINE (HYBRID VEHICLE CONTROL ECU ASSEMBLY)


    1. Disconnect the K142 hybrid vehicle control ECU assembly connector.

    2. B003YCZC67
      *a

      Front view of wire harness connector

      (to Hybrid Vehicle Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Result Specified Condition
      K142-31 (CA3P) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANH short to ground 200 Ω or higher
      K142-30 (CA3N) - K142-4 (E12) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANL short to ground
      K142-31 (CA3P) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal Below 6 kΩ: CANH +B short 6 kΩ or higher
      K142-30 (CA3N) - K142-3 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)

  26. CHECK FOR SHORT IN SUB BUS 15 LINE (ECM)


    1. Disconnect the A78 and F5 ECM connectors.

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

      B003XZSC33
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -
      Standard Resistance
      Tester Connection Condition Result Specified Condition
      F5-61 (CAN+) - F5-16 (E1) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANH short to ground 200 Ω or higher
      F5-62 (CAN-) - F5-16 (E1) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANL short to ground
      F5-61 (CAN+) - A78-1 (BATT) Cable disconnected from negative (-) auxiliary battery terminal Below 6 kΩ: CANH +B short 6 kΩ or higher
      F5-62 (CAN-) - A78-1 (BATT) Cable disconnected from negative (-) auxiliary battery terminal 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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

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

  27. CHECK FOR SHORT IN SUB BUS 15 LINE (SKID CONTROL ECU ASSEMBLY)


    1. Disconnect the A25 skid control ECU assembly connector.

    2. B003Y0LC05
      *a

      Front view of wire harness connector

      (to Skid Control ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Result Specified Condition
      A25-9 (CANH) - A25-1 (GND4) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANH short to ground 200 Ω or higher
      A25-8 (CANL) - A25-1 (GND4) Cable disconnected from negative (-) auxiliary battery terminal Below 200 Ω: CANL short to ground
      A25-9 (CANH) - A25-38 (+BI2) Cable disconnected from negative (-) auxiliary battery terminal Below 6 kΩ: CANH +B short 6 kΩ or higher
      A25-8 (CANL) - A25-38 (+BI2) Cable disconnected from negative (-) auxiliary battery terminal 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 15 inspection.

      • Find the necessary inspection from the Result column that matches the result in the Result column from the Check Sub Bus 15 inspection.

      Result
      Result
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)