CAN COMMUNICATION SYSTEM Combination Meter ECU Communication Stop Mode

DTC Code DTC Name
Combination Meter ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Combination Meter ECU Communication Stop Mode

Either condition is met:

  • "Combination Meter" is not displayed on the "CAN Bus Check" screen (Click here).

  • Communication system DTCs (DTCs that start with U) that are output correspond to "Combination Meter ECU Communication Stop Mode" in "DTC Combination Table" (Click here).

  • Combination meter assembly CAN main wire or connector

  • Power source circuit of combination meter assembly

  • Combination meter assembly ground circuit

  • Combination meter assembly

WIRING DIAGRAM

C348493E04

CAUTION / NOTICE / HINT

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, 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 battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).

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

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

  • 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).

Tip:

  • Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

  • 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 FOR OPEN IN CAN BUS WIRE (COMBINATION METER ASSEMBLY CAN MAIN WIRE)

    1. U184689E02

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

    2. Disconnect the combination meter assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H62-22 (CANH) - H62-23 (CANL)

      Cable disconnected from negative (-) battery terminal

      108 to 132 Ω
      Table 1. Text in Illustration

      *a

      Front view of wire harness connector

      (to Combination Meter Assembly)
      Table 2. Result

      Result

      Proceed to

      OK (w/o Stop and Start System)

      A

      OK (w/ Stop and Start System)

      B

      NG

      C

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)Click here

    REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)

    1. U184690E02

      Connect the cable to the negative (-) battery terminal.

      Note:

      When connecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H62-21 (ET) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      H62-40 (B) - Body ground

      Always

      11 to 14 V

      H62-39 (IG+) - Body ground

      Ignition switch ON

      11 to 14 V
    Table 3. Text in Illustration

    *a

    Front view of wire harness connector

    (to Combination Meter Assembly)

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND)

    1. U184690E02

      Connect the cable to the negative (-) battery terminal.

      Note:

      When connecting the cable, some systems need to be initialized after the cable is reconnected (Click here).

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H62-21 (ET) - Body ground

      Always

      Below 1 Ω

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      H62-40 (B) - Body ground

      Always

      11 to 14 V

      H62-39 (IG+) - Body ground

      Ignition switch ON

      10.5 to 16 V
    Table 4. Text in Illustration

    *a

    Front view of wire harness connector

    (to Combination Meter Assembly)
    Table 5. Result

    Result

    Proceed to

    OK

    A

    NG (IG+ terminal)

    B

    NG (Except IG+ terminal)

    C

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

    GO TO STOP AND START SYSTEM

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR