METER / GAUGE SYSTEM Entire Combination Meter does not Operate

DESCRIPTION

This circuit is the power source circuit for the meter. This circuit provides two types of power sources; 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 of the meter CPU, however, it is also used for communication. If a voltage of 12 V is not applied to terminal IG+ when turning the engine switch on (IG), the indicator will not operate.

WIRING DIAGRAM

A015YUZE02

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT COMBINATION METER


    1. A0163AGE01

      Disconnect the J34 connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition

      J34-1 (E2) -

      Body ground

      		 Always Below 1 Ω

      J34-13 (ES) -

      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

      J34-12 (IG+) -

      Body ground

      		 Engine switch on (IG) 11 to 14V

      J34-23 (B) -

      Body ground

      		 Always 11 to 14 V

      J34-24 (B) -

      Body ground

      		 Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE COMBINATION METER Click here