SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 636 (CRUISE CONTROL SYSTEM - DIAGNOSTICS)DTC P0571/52: BRAKE SWITCH "A" 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 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE OF HAND-HELD TESTER 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch ON and push the hand-held tester main switch ON.
    3. Select the item "STP LIGHT SW" in the DATA LIST and read its value displayed on the hand-held tester.

      OK: 

      Brake pedal depressed: ON 

      Brake pedal released: OFF 

    1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 
    2. NG: Go to Next Step 
  2. INSPECT STOP LAMP SWITCH ASSY 
    1. Disconnect the stop lamp switch connector.
    2. Check that the continuity exists between each terminals of the stop lamp switch, as shown in the chart below.

      OK: 

      SPECIFICATION TERMINAL CONNECTION

      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
      G02895446Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: REPLACE STOP LAMP SWITCH ASSY 
    2. OK: Go to Next Step 
  3. CHECK HARNESS AND CONNECTOR (STP, ST1-) 
    1. Remove ECM with connector.
    2. Disconnect the E7 connector from ECM.
    3. Measure the voltage between terminal STP of ECM connector and body ground when the brake pedal is depressed and released.

      OK: 

      DEPRESSED CONDITION

      Depressed 10 - 14 V
      Released Below 1 V
      Fig 2: Measuring Voltage Between Terminal STP Of ECM Connector & Body Ground
      G02895447Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Turn ignition switch ON.
    5. Measure the voltage between terminal ST1- of ECM connector and body ground when the brake pedal is depressed and released.

      OK: 

      DEPRESSED CONDITION

      Depressed Below 1 V
      Released 10 - 14 V
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: CHECK AND REPLACE ECM (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
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.