CAN COMMUNICATION SYSTEM(for LHD) 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 "CAN Bus Check".

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

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  • Power source or inside combination meter assembly

  • Combination meter assembly CAN main wire or connector

  • Combination meter assembly

  • Engine stop and start ECU*

*: w/ Stop and Start System

WIRING DIAGRAM

C277453E01

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.

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  • 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.

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

  • DTC check procedure: Turn the ignition switch to ON and wait at least 51 seconds.

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

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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. C221258C08

      *a

      Rear view of wire harness connector

      (to Combination Meter Assembly)

      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

      G16-32 (CANH) - G16-31 (CANL)

      Cable disconnected from negative (-) battery terminal

      108 to 132 Ω

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

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

    1. C221258C06

      *a

      Rear view of wire harness connector

      (to Combination Meter Assembly)

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

      Note:

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

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      G16-40 (B) - Body ground

      Always

      11 to 14 V

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E16-21 (ET) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. C221258C07

      *a

      Rear view of wire harness connector

      (to Combination Meter Assembly)

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      G16-39 (IG+) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG (w/o Stop and Start System)

    NG (w/ Stop and Start System)
    OK

    REPLACE COMBINATION METER ASSEMBLY

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    NG (w/o Stop and Start System)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG (w/ Stop and Start System)

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ENGINE STOP AND START ECU)

    1. Disconnect the G87 engine stop and start ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G16-39 (IG+) - G87-11 (IGO2)

      Always

      Below 1 Ω

      G16-39 (IG+) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ENGINE STOP AND START ECU

    Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR