DTC B2284: Brake Signal Malfunction: Procedure

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for the multiplex communication system DTCs B1210, B1214 and B1215.

   HINT: 

   If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first.

   RESULT
   
   

   Result	Proceed to
   DTCs B1210, B1214 and B1215 are not output	A
   DTCs B1210, B1214 and B1215 are output	B

B → See step   6 

A: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for the CAN communication system DTCs. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

   HINT: 

   If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first.

   RESULT
   
   

   Result	Proceed to
   CAN communication system DTCs are not output	A
   CAN communication system DTCs are output	B

B → See step   7 

A: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for the SFI system DTCs.

   HINT: 

   If the DTCs for the SFI system malfunction are output, inspect those DTCs first.

   RESULT
   
   

   Result	Proceed to
   DTC is not output.	A
   DTC is output (for 2GR-FSE).	B
   DTC is output (for 4GR-FSE).	C

B → See step   8 

C → See step   11 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine 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	Diagnostic Note
   Stop Light Switch1	Stop light switch1 / ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   RESULT
   
   

   Result	Proceed to
   ON or OFF does not appear on the screen according to vehicle operating conditions	A
   ON or OFF appears on the screen according to vehicle operating conditions (for 2GR-FSE)	B
   ON or OFF appears on the screen according to vehicle operating conditions (for 4GR-FSE)	C

B → See step   9 

C → See step   12 

A: Go to next step 

1. Disconnect the J55 connector from the power source control ECU.
   Fig 1: J55 Connector Terminal Identification

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

   Tester Connection	Condition	Specified Condition
   J55-1 (STP) - Body ground	Brake Pedal released	Below 1 V
   J55-1 (STP) - Body ground	Brake pedal depressed	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Source Control ECU)

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

OK → See step   10