B2284

1UR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2284: Brake Signal Malfunction
B2284 - Brake Signal Malfunction

DESCRIPTION

This DTC is output when: 1) the brake signal circuit between the main body ECU and the stop light switch is malfunctioning; and 2) the CAN information is inconsistent.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)

(a) Use the Data List to check if the stop light switch is functioning properly.

Main Body





OK:

ON (brake pedal depressed) appears on screen.

NG -- REPLACE MAIN BODY ECU
OK -- Continue to next step.

2. INSPECT FUSE (STOP)

(a) Remove the STOP fuse from the main body ECU.

(b) Measure the resistance of the fuse.

Standard resistance:





NG -- REPLACE FUSE
OK -- Continue to next step.

3. INSPECT STOP LIGHT SWITCH

(a) Remove the stop light switch Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPLACE STOP LIGHT SWITCH Removal
OK -- Continue to next step.

4. CHECK WIRE HARNESS (STOP LIGHT SWITCH - MAIN BODY ECU AND BATTERY)





(a) Disconnect the A35 stop light switch connector.

(b) Disconnect the DH main body ECU connector.

(c) Measure the voltage and resistance according to the value(s) in the table below.

Standard voltage:





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH)

(a) Use the Data List to check if the stop light switch is functioning properly.

Body No.4





OK:

ON (brake pedal depressed) appears on screen.

NG -- REPLACE MAIN BODY ECU

OK -- GO TO LIGHTING SYSTEM How To Proceed With Troubleshooting