DTC B2284 Brake Signal Malfunction (Cable-Information does not Match to Bean-Information): Wiring Diagram

Fig 1: Wiring Diagram - Brake Signal Malfunction

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 when the brake pedal is depressed (See PROBLEM SYMPTOMS TABLE ).

1. CHECK DTC OUTPUT (MULTIPLEX NETWORK COMMUNICATION SYSTEM) 
   1. Delete the DTC (See DIAGNOSIS SYSTEM  ).
   2. Check for the multiplex network communication system DTCs B1210, B1214 and B1215.

      HINT:

      If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first (See DTC CHECK/CLEAR ).

      OK: No DTC is output. 

   NG : GO TO  MULTIPLEX COMMUNICATION SYSTEM 

   OK : GO TO NEXT STEP 

2. READ VALUE OF INTELLIGENT TESTER (STOP LIGHT SWITCH) 
   1. Check the DATA LIST for proper functioning of the stop light switch.

      Power source control ECU: 

      DATA LIST
      
      

      Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
      STOP LAMP SW1	Stop light switch 1/ ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

      OK: ON (brake pedal depressed) appears on the screen. 

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      OK (When troubleshooting according to the DTC chart)	A
      OK (When troubleshooting according to the PROBLEM SYMPTOMS TABLE)	B
      NG	C

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

   C : Go to step 3 

   A : REPLACE POWER SOURCE CONTROL ECU 

3. INSPECT FUSE (STOP SW) 
   1. Remove the STOP SW fuse from the cowl side J/B RH.
   2. Measure the resistance of the fuse.

      Standard resistance: Below 1 Ω 

   NG : REPLACE FUSE 

   OK : GO TO NEXT STEP 

4. INSPECT STOP LIGHT SWITCH 
   1. Remove the switch.
   2. Measure the resistance of the switch.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	Switch pin free	Below 1 Ω
      3 - 4	Switch pin free	10 kΩ or higher
      1 - 2	Switch pin pushed in	10 kΩ or higher
      3 - 4	Switch pin pushed in	Below 1 Ω

      Fig 2: Inspecting Stop Light Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPLACE STOP LIGHT SWITCH 

   OK : GO TO NEXT STEP 

5. CHECK WIRE HARNESS (STOP LIGHT SWITCH - POWER SOURCE CONTROL ECU AND BATTERY) 
   1. Disconnect the A22 switch connector.
   2. Disconnect the J55 ECU connector.
   3. Measure the voltage and resistance of the wire harness side connectors.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      A22-2 - Body ground	10 to 14 V

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection (Symbols)	Specified Condition
      A22-1 - J55-1 (STP)	Below 1 Ω
      A22-1 or J55-1 (STP) - Body ground	10 kΩ or higher

      Fig 3: Identifying A22 Stop Light Switch Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK : REPLACE POWER SOURCE CONTROL ECU