CAN COMMUNICATION SYSTEM Combination Meter ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Combination Meter ECU Communication Stop Mode

  • "Combination Meter" not displayed on "Communication Bus Check" screen of intelligent tester

  • Applies to "Combination Meter ECU Communication Stop Mode" in "DTC combination table"

  • Power source circuit of combination meter ECU

  • Combination meter ECU main wire or connector

  • Combination Meter Assembly (Combination meter ECU)

WIRING DIAGRAM

A0118FSE07
A011ATNE01

INSPECTION PROCEDURE

Note


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

  • Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.

  • After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

Tech Tips

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

PROCEDURE


  1. CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER ECU MAIN WIRE)


    1. A01189VE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter Assembly (Combination Meter ECU))

      Turn the ignition switch off.

    2. Disconnect the D1 combination meter assembly (combination meter ECU) connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      D1-21 (CANH) - D1-20 (CANL) Ignition switch off 108 to 132 Ω

    4. Reconnect the combination meter assembly (combination meter ECU) connector.


    NG

    REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN-H, CAN-L)

    OK

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


    1. A01189VE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Combination Meter Assembly (Combination Meter ECU))

      Disconnect the D1 combination meter assembly (combination meter ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D1-24 (ET) - Body ground Always Below 1 Ω

    3. Measure the voltage according to the value in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D1-2 (B) - Body ground Always 11 to 14 V
      D1-1 (IG+) - Body ground Ignition switch ON 11 to 14 V

    4. Reconnect the combination meter assembly (combination meter ECU) connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here