FixVault

Combination Meter System - Diagnosis: Pre-Check

  1. BEFORE CHECK 

    Since a trouble symptom may result from multiple causes, check not only the part where a user complains of but also the following items in order to be sure no other trouble is identified.

    • Fuse related parts
    • Wire harness related parts
    • Valve related parts
    NOTE:
    • Setting the ignition switch to START temporarily stops all meter operation, however, this is not an error.
    • When replacing the combination meter ECU, carefully avoid any contact with the IC.
    • Removing a battery terminal during engine operation may cause a reversed current and lead to malfunction.
    • When disconnecting any connector or terminal, be sure to disconnect the battery terminal.
  2. FUEL GAUGE DIAGNOSIS CHECK 
    1. Fuel emergency display
      NOTE:

      If FR voltage input to the fuel sender gauge is abnormal (4.8 V or more, or 0.06 V or less) due to any error, an emergency will be displayed.

    2. Display:

    Immediately after the ignition switch is ON, all of the segments flash.

    Fig 1: Diagnosis Display Plausible Cause Table
    G02830016Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Flashing Pattern
    G02830017Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002