ELECTRONICALLY CONTROLLED BRAKE SYSTEM Brake Control Warning Light Remains ON

DESCRIPTION

If the ECU stores a DTC, the brake warning light / yellow (minor malfunction) comes on in the combination meter.

The skid control ECU is connected to the combination meter via CAN communication.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT CAN COMMUNICATION SYSTEM

   
   

   1. for LHD:

      Check if the CAN communication system DTC is output Click here.

      for RHD:

      Check if the CAN communication system DTC is output Click here.

      Result

      Result	Proceed to
      DTC is not output	A
      DTC is output (for LHD)	B
      DTC is output (for RHD)	C

   
   

   B

   GO TO CAN COMMUNICATION SYSTEM (for LHD) Click here

   C

   GO TO CAN COMMUNICATION SYSTEM (for RHD) Click here

   A

2. INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

   
   

   1. Check the skid control ECU connector's connection.

      OK
      The connector is securely connected.

   
   

   NG

   CONNECT CONNECTOR TO ECU CORRECTLY

   OK

3. INSPECT BATTERY

   
   

   1. Check the battery voltage.

      Result
      Result Proceed to OK (Standard voltage: 11 to 14 V) A for 1UR-FSE: NG B for 1UR-FE: NG C

   
   

   B

   INSPECT CHARGING SYSTEM (for 1UR-FSE) Click here

   C

   INSPECT CHARGING SYSTEM (for 1UR-FE) Click here

   A

4. INSPECT COMBINATION METER ASSEMBLY

   
   

   1. Check the combination meter Click here.

      Tech Tips

      If troubleshooting has been carried out according to the "PROBLEM SYMPTOMS TABLE", refer back to the table and proceed to the next step before replacing the part Click here.

      Result

      Result	Proceed to
      OK (for LHD)	A
      OK (for RHD)	B
      NG	C

   
   

   B

   REPLACE SKID CONTROL ECU (for RHD) Click here

   C

   REPLACE NO. 1 METER ECU SUB-ASSEMBLY Click here

   A

   REPLACE SKID CONTROL ECU (for LHD) Click here