METER / GAUGE SYSTEM Entire Combination Meter does not Operate

DESCRIPTION

This circuit is the power source circuit for the combination meter. This circuit provides 2 power source types: one is a constant power source mainly used as a backup power source, and the other is a power source mainly used for signal transmission. The constant power source is mainly used as a backup power source for the meter CPU. However, it is also used for communication. If a voltage of 12 V is not applied to terminal IG+ when the ignition switch isON, indicators will not operate.

WIRING DIAGRAM

A01X3O3E01
*1 from IG2 Relay
*2 Combination Meter Assembly
*3 Battery

PROCEDURE


  1. INSPECT FUSE (MET, ECU-B1)


    1. Remove the MET and ECU-B1 fuses from the engine room relay block.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      MET fuse Always Below 1 Ω
      ECU-B1 fuse

    NG

    REPLACE FUSE

    OK

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

    A01X00FE01
    *1 Rear view of wire harness connector: (to Combination Meter Assembly)

    1. Disconnect the E7 meter connector.

    2. Measure the resistance and voltage according to the value(s) in the tables below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E7-15 (ET) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E7-17 (B) - Body ground Always 11 to 14 V
      E7-18 (IG+) - Body ground Ignition switch ON
      Result
      Result Proceed to
      NG A
      OK (w/ Multi-information Display) B
      OK (w/o Multi-information Display) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    C

    REPLACE COMBINATION METER ASSEMBLY Click here