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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 627 (COMBINATION METER - DIAGNOSTICS)MALFUNCTION IN SPEEDOMETERINSPECTION 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. CONFIRM ENGINE MODELS 
    1. Confirm the engine models.
    CONFIRM ENGINE MODELS

    A B
    1MZ-FE 2AZ-FE
    1. B: Go to step   5 
    2. A: 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 C7-35 and body ground.
      3. Start the engine.
        Fig 1: Identifying Combination Meter Assy C7-35
        G02895106Courtesy 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, 20 ms/DIV
      Vehicle condition Driving at approx. 20Km/h

      Standard: 

      As shown in the illustration 

    HINT:

    As the vehicle speed increases, the cycle of the signal waveform narrows.

    Result: 

    RESULT

    A OK
    B NG (w/ ABS & BA & TRAC & VSC)
    C NG (w/ ABS)
    Fig 2: Signal Waveform
    G02895107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. B: Go to step   3 
    2. C: Go to step   4 
    3. A: CHECK AND REPLACE COMBINATION METER ASSY 
  3. INSPECT SKID CONTROL ECU ASSY 
    1. Check voltage.
      1. Shift the shift lever to neutral.
      2. Jack up either of the front wheel.
      3. Turn the ignition switch to ON.
      4. Measure voltage between terminals S9-2 of the skid control ECU assy and body ground when the front wheel is turning slowly.

      Standard voltage: 

      Voltage is generated intermittently. 

      Fig 3: Identifying Combination Meter Assy Terminal S9-2
      G02895108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

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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.