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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 603 (KEY REMINDER WARNING SYSTEM - DIAGNOSIS)HOW TO PROCEED WITH TROUBLESHOOTING
2004 Toyota Matrix XR, FWD, Standard

How To Proceed With Troubleshooting

2004 Toyota Matrix XR, FWD, StandardSECTION How To Proceed With Troubleshooting
WARNING: This page is about a different car, the 2002 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. VEHICLE BROUGHT TO WORKSHOP 
    1. GO TO NEXT STEP 
  2. CUSTOMER PROBLEM ANALYSIS CHECK AND PROBLEM SYMPTOM CONFIRMATION 
    1. GO TO NEXT STEP 
  3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE BODY MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
    1. Check there is no abnormality in the communication system by inspecting the communication function of the body multiplex communication system with LEXUS hand-held tester.
      1. (ECU unconnected, communication line abnormal) Without code outputs, proceed to "A".
      2. (ECU unconnected, communication line abnormal) With code outputs, proceed to "B".
    1. B: MULTIPLEX COMMUNICATION SYSTEM, see  DIAGNOSTICS TROUBLE CODE CHART  . 
    2. A: GO TO NEXT STEP 
  4. CHECK DIAGNOSTIC TROUBLE CODE, see  DIAGNOSTIC TROUBLE CODE CHART  . 
    1. Check a DTC and note it if a code is output.
    2. Delete the DTC.
    3. Check if the DTC will be output once again, when the problem symptom is simulated based on the noted code.
      1. Without an output of the code, proceed to "A".
      2. With an output of the code, proceed to "B".
    1. B: GO TO STEP   7 
    2. A: GO TO NEXT STEP 
  5. PROBLEM SYMPTOMS TABLE, see  PROBLEM SYMPTOMS TABLE  . 
    1. Without an applicable problem symptom table, proceed to "A".
    2. With an applicable problem symptom table, proceed to "B".
    1. B: GO TO STEP 7 
    2. A: GO TO NEXT STEP 
  6. ACCORDING TO PROBLEM SYMPTOM, PERFORM TROUBLESHOOTING 
    1. PRE-CHECK, see PRE-CHECK .
      1. Inspection with LEXUS hand-held tester (ECU data monitor)
      2. Inspection with LEXUS hand-held tester (Active test)
    2. TERMINAL OF ECU, see TERMINALS OF ECU .
    3. INSPECTION, see INSPECTION .
  7. ADJUSTMENT, REPAIR OR REPLACE 
    1. GO TO NEXT STEP 
    2. END 
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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.