B2284

1NZ-FXE STARTING: SMART KEY SYSTEM: B2284: Brake Signal Malfunction

DTC B2284 - Brake Signal Malfunction

DESCRIPTION

This DTC is output when: 1) the brake signal circuit between the power source control ECU and the stop light switch is malfunctioning, and 2) the BEAN information is inconsistent.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE OF DATA LIST (STOP LIGHT SWITCH)
(a) Connect Techstream to the DLC3.
(b) Turn the power switch ON (IG) and press Techstream main switch ON.
(c) Read the DATA LIST according to the displays on the tester.

Power source control ECU





OK:
ON (brake pedal depressed) appears on the screen.
OK -- REPLACE POWER SOURCE CONTROL ECU
NG -- Continue to next step.
2. CHECK WIRE HARNESS (STOP LIGHT SWITCH - POWER SOURCE CONTROL ECU AND BATTERY)





(a) Disconnect the S16 switch connector.
(b) Disconnect the P6 ECU connector.
(c) Measure the resistance and voltage of the wire harness side connectors.
Standard resistance:






Standard voltage






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
3. INSPECT STOP LIGHT SWITCH ASSEMBLY
(a) Remove the stop light switch.





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





NG -- REPLACE STOP LIGHT SWITCH ASSEMBLY
OK -- REPLACE POWER SOURCE CONTROL ECU