SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 515 (MULTIPLEX COMMUNICATION 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 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

  • Use this procedure to troubleshoot the multiplex communication system.
  • The hand-held tester should be used in step 2.
  1. VEHICLE BROUGHT TO WORKSHOP 
  2. DTC CHECK (See  DTC CHECK/CLEAR   ) 
    1. Check for DTCs and note any codes that are output.
    2. Delete the DTC.
    3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.
      1. If the DTC does not reoccur, proceed to A.
      2. If the DTC reoccurs, proceed to B.

    B: Go to step   4 

    A: Go to next step. 

  3. OVERALL ANALYSIS AND TROUBLESHOOTING 
    1. Terminals of ECU (see TERMINALS OF ECU  )
  4. ADJUST, REPAIR OR REPLACE 
  5. CONFIRMATION TEST 

    END 

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.