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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 295 (Engine Immobilizer System - Diagnostics) >> Circuit Inspection >> DTC B2798/99: Communication Malfunction No. 2 >> Inspection Procedure

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. Check Transponder Key Coil  . See INSPECT TRANSPONDER KEY COIL CONTINUITY .
    1. NG  : Replace transponder key coil.
    2. OK  : Go to next step.
  2. Check Harness & Connector Between Transponder Key Amplifier & ECM  .
    1. NG  : Repair or replace harness and connector.
    2. OK  : Go to next step.
  3. Does The System Operate Normally After Replacement Of Transponder Key Amplifier  ?
    1. Yes  : Replace transponder key amplifier.
    2. No  : Replace ECM.
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