CAN COMMUNICATION SYSTEM(w/ Central Gateway ECU) ECM Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
ECM Communication Stop Mode

Any of the following conditions are met:


  • "Engine (ECM)" is indicated on the "Communication Bus Check" screen of the GTS.

    Click here

  • Communication system DTCs (DTCs that start with U) that are output correspond to "ECM Communication Stop Mode" in "DTC Combination Table"

    Click here


  • ECM CAN main wire or connector

  • Power source circuit of ECM

  • ECM ground circuit

  • ECM

WIRING DIAGRAM


  1. for 1GR-FE with Manual Transmission:

    B001CYLE01

  2. for 1GR-FE with Automatic Transmission:

    B001CYLE02

  3. for 1KD-FTV:

    B001GTKE01

  4. for 1GD-FTV:

    B001FGLE01

  5. for 2TR-FE:

    B001CYLE06

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Note


  • 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

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

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

    Click here

  • Some parts must be initialized and set when replacing or removing and installing parts.

    Click here

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

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • 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

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

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 FOR OPEN IN CAN BUS WIRE (ECM MAIN WIRE)


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

    2. Disconnect the ECM connector.

      B001D4SC01
      *A for 1GR-FE *B for Manual Transmission
      *C for Automatic Transmission *D for 1KD-FTV
      *E for 2TR-FE *F for 1GD-FTV
      *a

      Front view of wire harness connector

      (to ECM)

      		 - -

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

      Standard Resistance
      for 1GR-FE with Manual Transmission
      Tester Connection Condition Specified Condition
      G56-32 (CANH) - G56-31 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      for 1GR-FE with Automatic Transmission
      Tester Connection Condition Specified Condition
      G56-31 (CANH) - G56-25 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      for 1KD-FTV
      Tester Connection Condition Specified Condition
      G58-35 (CANH) - G58-36 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      for 1GD-FTV
      Tester Connection Condition Specified Condition
      G184-17 (CANH) - G184-28 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω
      for 2TR-FE
      Tester Connection Condition Specified Condition
      G181-13 (CANH) - G181-14 (CANL) Cable disconnected from negative (-) battery terminal 108 to 132 Ω

    NG

    REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. for 1GR-FE with Manual Transmission:


      1. Disconnect the ECM connectors.

        B001DI3C01
        *a

        Front view of wire harness connector

        (to ECM)

        		 - -

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C36-12 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C37-14 (E01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C37-15 (E02) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C37-10 (ME01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        G55-12 (EC) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

        Note

        When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click here

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        G55-24 (BATT) - Body ground Always 11 to 14 V
        G55-23 (+B2) - Body ground Battery positive (+) voltage applied to terminal G55-9 (MREL) 11 to 14 V
        G55-22 (+B) - Body ground Battery positive (+) voltage applied to terminal G55-9 (MREL) 11 to 14 V

    2. for 1GR-FE and Automatic Transmission:


      1. Disconnect the ECM connectors.

        B001EZQC01
        *a

        Front view of wire harness connector

        (to ECM)

        		 - -

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C36-12 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C36-23 (E01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C37-14 (E02) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C36-29 (ME01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        G55-3 (EC) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

        Note

        When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click here

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        G55-24 (BATT) - Body ground Always 11 to 14 V
        G55-22 (+B2) - Body ground Battery positive (+) voltage applied to terminal G56-36 (MREL) 11 to 14 V
        G55-23 (+B) - Body ground Battery positive (+) voltage applied to terminal G56-36 (MREL) 11 to 14 V

    3. for 1KD-FTV:


      1. Disconnect the ECM connectors.

        B001FNFC01
        *a

        Front view of wire harness connector

        (to ECM)

        		 - -

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C93-1 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C93-12 (E01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C93-13 (E02) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C93-8 (ME01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        G57-11 (EC) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

        Note

        When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click here

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        G57-23 (BATT) - Body ground Always 11 to 14 V
        G57-17 (+B2) - Body ground Battery positive (+) voltage applied to terminal G58-11 (MREL) 11 to 14 V
        G57-24 (+B) - Body ground Battery positive (+) voltage applied to terminal G58-11 (MREL) 11 to 14 V

    4. for 1GD-FTV:


      1. Disconnect the ECM connectors.

        B001HH3C01
        *a

        Front view of wire harness connector

        (to ECM)

        		 - -

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C152-1 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C151-3 (E01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C152-4 (E02) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C152-3 (ME01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        G185-8 (EC) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

        Note

        When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click here

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        G185-1 (BATT) - Body ground Always 11 to 14 V
        G185-2 (+B) - Body ground Battery positive (+) voltage applied to terminal G184-14 (MREL) 11 to 14 V
        G185-3 (+B2) - Body ground Battery positive (+) voltage applied to terminal G184-14 (MREL) 11 to 14 V
        G185-4 (+B3) - Body ground Battery positive (+) voltage applied to terminal G184-14 (MREL) 11 to 14 V

    5. for 2TR-FE:


      1. Disconnect the ECM connectors.

        B001GBFC01
        *a

        Front view of wire harness connector

        (to ECM)

        		 - -

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        C153-3 (E1) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C153-1 (E01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C153-2 (E02) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        C153-4 (ME01) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
        G180-18 (EC) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω

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

        Note

        When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

        Click here

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

        Standard Voltage
        Tester Connection Condition Specified Condition
        G180-3 (BATT) - Body ground Always 11 to 14 V
        G180-1 (+B) - Body ground Battery positive (+) voltage applied to terminal G181-6 (MREL) 11 to 14 V
        G180-2 (+B2) - Body ground Battery positive (+) voltage applied to terminal G181-6 (MREL) 11 to 14 V

    OK

    REPLACE ECM for 1GR-FE: Click here
    REPLACE ECM for 1KD-FTV: Click here
    REPLACE ECM for 1GD-FTV: Click here
    REPLACE ECM for 2TR-FE: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)