DTC B2284: Brake Signal Malfunction: Procedure

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) 

OK: Go to next step 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 

OK: Go to next step 

1. Remove the stop light switch assembly. Refer to REMOVAL .
   Fig 1: Identifying Stop Light Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 - 2	Pushed	10 kΩ or higher
   3 - 4	Pushed	Below 1 Ω
   1 - 2	Not pushed	Below 1 Ω
   3 - 4	Not pushed	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Stop Light Switch Assembly)
   *2	Free
   *3	Pushed in

NG → See step   6 

OK: Go to next step 

1. Disconnect the F51 connector from the power management control ECU.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F51-11 (STP1) - A25-1	Always	Below 1 Ω
   F51-11 (STP1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER MANAGEMENT CONTROL ECU) 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical/Power Source Control/Data List.
5. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Specified Condition
   Stop Light Switch1	Stop light switch1/ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   OK

   ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen.

NG → See step   7 

OK → See step   8