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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 747 (CRUISE CONTROL SYSTEM - DIAGNOSIS)DTC P0571/52: 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 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT STOP LAMP SWITCH OPERATION 
    1. Check that the stop lamp comes on while depressing the brake pedal, and goes off when releasing the brake pedal.

      NG: INSPECT STOP LAMP SWITCH CIRCUIT (SEE  DTC C1249/49: OPEN CIRCUIT IN STOP LIGHT SWITCH CIRCUIT  ) 

    OK: Go to next step. 

  2. INSPECT STOP LAMP SWITCH ASSY 
    1. Turn the ignition switch off.
    2. Disconnect the stop lamp switch assy connector.
      Fig 1: Disconnecting Stop Lamp Switch Assy Connector
      G01437745Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in Fig 2 .

    Standard: 

    Fig 2: Stop Lamp Switch Assy Specifications Chart
    G01437744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE STOP LAMP SWITCH ASSY (SEE  PEDAL RESERVE DISTANCE  ) 

    OK: Go to next step. 

  3. INSPECT ECM 
    1. Reconnect the stop lamp switch assy connector.
    2. Disconnect the E7 connector of the ECM.
      Fig 3: Disconnecting E7 Connector
      G01437747Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the ignition switch to the ON position.
    4. Measure the voltage according to the value(s) in Fig 4 .

      Standard: 

      Fig 4: Measuring Voltage
      G01437746Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Measure the voltage according to the value(s) in Fig 6 .
      Fig 5: Measuring Voltage Between ST1 & Body Ground
      G01437749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Fig 6: Measuring Voltage Between ECM & Body Ground Specifications Chart
      G01437748Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LAMP SWITCH ASSY - ECM) 

      OK: REPLACE ECM (SEE  REPLACEMENT  ) 

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.