SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 627 (COMBINATION METER - DIAGNOSTICS)MALFUNCTION IN TACHOMETERINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Inspection Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE OF HAND-HELD TESTER (TACH) 
    1. Check output value of ECM.
      1. Connect the hand-held tester to DLC3.
      2. Turn the ignition switch to ON and push the hand-held tester main switch to ON.
      3. Select the item "ENGINE SPD" in the DATA LIST and read its value displayed on the hand-held tester.

      OK: There is almost no difference in the displayed engine rpm value. 

    1. NG: GO TO ENGINE CONTROL SYSTEM 
    2. OK: Go to next step. 
  2. CHECK COMBINATION METER ASSY 

    INSPECTION USING OSCILLOSCOPE 

    1. Check the input signal waveform.
      1. Remove the combination meter assy.
      2. Connect the oscilloscope to the terminals C7-11 and body ground.
      3. Start the engine.
        Fig 1: Identifying Combination Meter Assy Terminal C7-11
        G02895118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Check the signal waveform according to the condition in SIGNAL WAVEFORM .
      SIGNAL WAVEFORM

      Item Condition
      Tool setting 5 V/DIV, 10 ms/DIV
      Vehicle condition Engine idle speed

      Standard: 

      As shown in  Fig 2 

      Fig 2: Standard Voltage Waveform
      G02895119Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: CHECK AND REPLACE COMBINATION METER ASSY 
    2. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.