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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 128 (REMOTE KEYLESS ENTRY SYSTEMS)TROUBLE SHOOTINGSYSTEM OPERATION CHECK
2004 Toyota Celica GT, Standard

System Operation Check

2004 Toyota Celica GT, StandardSECTION System Operation Check
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Trouble shooting of a remote keyless entry system complaint begins with verification of the customer problem. Perform the Customer Problem Analysis Check (Remote Keyless Entry System). See Fig 1.
  2. Inspect the communication function of the large-scale body multiplex communication system (BEAN). Check that there is no abnormality in the communication system by inspecting with a hand-held tester:
    • (ECU unconnected, communication line abnormal) Without code outputs, go to step  3.
    • (ECU unconnected, communication line abnormal) With code outputs, go to MULTIPLEX COMMUNICATION SYSTEM article in COMMUNICATION DEVICES.
  3. Check the diagnostic trouble code. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  table under SELF-DIAGNOSTIC SYSTEM:
    • Without code outputs, go to step  4.
    • With code outputs, go to step  6.
  4. Refer to symptoms table. See SYMPTOM INDEX (WIRELESS DOOR LOCK CONTROL SYSTEM)  table:
    • Without applicable symptoms, go to step  5.
    • With applicable symptoms, go to step  6.
    SYMPTOM INDEX (WIRELESS DOOR LOCK CONTROL SYSTEM)

    Symptom Perform Test
    All Functions Of Wireless Door Lock Control System Do Not Operate (Power Door Lock System Does Operate) TEST B 
    No Answer Back TEST C 
  5. Perform trouble shooting in the following method, depending on the malfunction symptom:
    • Pre-check. See PRE-CHECK  under SELF-DIAGNOSTIC SYSTEM. Inspection with hand-held tester (ECU DATA MONITOR) and hand-held tester (ACTIVE TEST).
    • Terminal of ECU. See TERMINALS OF ECU  under COMPONENT TESTS.
    • On-vehicle inspection. See ON-VEHICLE INSPECTION .
  6. Perform necessary adjustments, repairs or replacements.
Fig 1: Customer Problem Analysis Check (Remote Keyless Entry System)
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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