DTC B2284: Brake Signal Malfunction: Procedure

1. Delete the DTCs, refer to DTC CHECK / CLEAR .
2. Check for 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, refer to DIAGNOSTIC TROUBLE CODE CHART .

   OK

   DTCs for CAN communication system No DTC is output.

NG → See step   6 

OK: Go to next step 

1. Delete the DTCs, refer to DTC CHECK / CLEAR .
2. Check for DTCs again.
3. Proceed to the next step based on the inspection result.

   Result

   Result	Proceed to
   No DTC is output	A
   Engine control system DTC are output	B
   Vehicle stability control system DTC are output	C

B → See step   7 

C → See step   8 

A: Go to next step 

1. Connect Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Check the DATA LIST for proper functioning of the stop light switch.
   MAIN BODY:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Stop Light SW	Stop light switch/ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   OK

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

NG → See step   4 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Check whether the stop lights turn on and off normally when the brake pedal is depressed and released.

   OK

   Stop lights turn on when brake pedal is depressed.

NG → See step   5 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK 

1. Disconnect the 1C connector from the instrument panel junction block.
2. Disconnect the A19 connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   1C-13 - A19-1	Always	Below 1 Ω
   1C-13 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)