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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 599 (LIGHTING SYSTEM - DIAGNOSIS)STOP LIGHT SWITCH CIRCUITINSPECTION 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 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE OF OBD II SCAN TOOL OR LEXUS HAND-HELD TESTER 
    1. Connect the LEXUS hand-held tester to the DLC3.
    2. Check the stop light switch using DATA LIST.

    Driver Side J/B ECU: 

    DRIVER SIDE J/B ECU INSPECTION

    Description Tester display Check condition
    Stop light switch STOP LIGHT SW ON - OFF
    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOM TABLE, SEE  PROBLEM SYMPTOMS TABLE  . 
    2. NG: GO TO NEXT STEP. 
  2. INSPECT STOP LAMP SWITCH ASSEMBLY 
    1. Disconnect the stop light switch connector.
    STOP LAMP SWITCH ASSEMBLY INSPECTION

    Switch position Tester connection Specified condition
    Switch pin free 1-2 Continuity
    Switch pin free 3-4 No continuity
    switch pin pushed in 1-2 No continuity
    switch pin pushed in 3-4 Continuity
    Fig 1: Inspecting Stop Lamp Switch Assembly
    G03386648Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE STOP LAMP SWITCH ASSEMBLY 
    2. OK: GO TO NEXT STEP. 
  3. CHECK HARNESS AND CONNECTOR 
    1. Check for open and short circuit in harness and connector between terminal STP1 of driver side J/B ECU and stop light switch.
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOM TABLE, SEE  PROBLEM SYMPTOMS TABLE  . 
RENDER: 1.0x

NO RELATED

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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.