B2284

2GR-FE STARTING: SMART KEY SYSTEM: B2284: Brake Signal Malfunction
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 cable and BEAN information are inconsistent.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Before performing the inspection procedure, depress the brake pedal and check that the stop lights come on. If the stop lights do not come on, Symptom Related Diagnostic Procedures.

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect Techstream to the DLC3.

(b) Turn the engine switch on (IG) and press Techstream main switch on.

(c) Read the Data List according to the displays on the tester.

Power Source Control:





OK:

"ON" (brake pedal depressed) appears on the screen.

Result:





C -- INSPECT STOP LIGHT SWITCH ASSEMBLY

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A -- REPLACE POWER SOURCE CONTROL ECU

2. INSPECT STOP LIGHT SWITCH ASSEMBLY

(a) Disconnect the stop light switch assembly connector.





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

Resistance:





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

3. CHECK WIRE HARNESS (STOP LIGHT SWITCH - POWER SOURCE CONTROL ECU AND BATTERY)

(a) Disconnect the A23 switch connector.





(b) Disconnect the D44 ECU connector.





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

Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER SOURCE CONTROL ECU