SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 372 (ENGINE IMMOBILIZER SYSTEM)DIAGNOSTIC TESTSDTC B2796/99: NO COMMUNICATION IN IMMOBILIZER SYSTEMINSPECTION 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 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Delete DTC And Insert All The Presently Available Keys To Check Whether The Engine Starts Or Not. 

    RESULT: 

    Fig 1: Charting Step 1 Results For DTC B2796/99
    G01119438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: If the result is "A", please confirm whether or not customers have ever inserted the key (without transponder chip) of other vehicle in the ignition key cylinder, and find out the cause of detecting DTC.
    1. A:  No problem at this time.
    2. B:  The transponder chip of a specific key is defective. Replace the key.
    3. C:  go to step  2.
  2. INSPECT TRANSPONDER KEY COIL CONTINUITY  . 
    1. NG:  Replace transponder key coil.
    2. OK:  Go to step  3.
  3. Check Harness And Connector Between Transponder Key Amplifier And ECM. 
    1. NG:  Repair or replace harness and connector.
    2. OK:  Go to step  4.
  4. Does It Operate Normally After Replacement Of Transponder Key Amplifier? 
    1. Yes:  Replace transponder key amplifier.
    2. No:  Replace ECM.
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.