Inspection Procedure

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Powertrain/Engine/Data List/All Data/Stop Light Switch.
   5. Read the values displayed on the Techstream.

      OK 

      ITEM NORMAL CONDITION CHART
      
      

      Item	Measurement Item/Range (display)	Normal Condition
      Stop Light Switch	Stop light switch status: ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released

      NG: Go to step 2 

      OK: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

2. INSPECT STOP LIGHT SWITCH ASSEMBLY 
   1. Inspect the stop light switch assembly (See INSPECTION ).

      NG: REPLACE STOP LIGHT SWITCH ASSEMBLY  (See STOP LIGHT SWITCH )

      OK: Go to next step 

3. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - ECM) 
   1. Turn the ignition switch to ON.
   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      D60-15 (ST1-) - Body ground	Brake pedal released	7.5 to 14 V
      	Brake pedal depressed	Below 1.5 V
      D60-20 (STP) - Body ground	Brake pedal released	Below 1.5 V
      	Brake pedal depressed	7.5 to 14 V

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 1: Identifying Brake Pedal Depressed And Released Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE ECM  (See REMOVAL )