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Home >> Toyota >> 2004 >> Matrix Base, 4WD >> Repair and Diagnosis >> Brakes >> Traction Control >> Abs With EBD System - Diagnostics >> Brake Warning Light Circuit >> Inspection Procedure

Inspection Procedure

  1. RECONFIRM DTC 
    1. Check the DTC (PRE-CHECK ).

      OK: 

      Normal code 

    1. NG: REPAIR CIRCUIT INDICATED BY OUTPUT CODE 
    2. OK: Go to next step. 
  2. INSPECT PARKING BRAKE SWITCH CIRCUIT 
    1. Check for open and short circuit in parking brake switch circuit (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE PARKING BRAKE SWITCH CIRCUIT 
    2. NG: REPAIR OR REPLACE PARKING BRAKE SWITCH CIRCUIT 
    3. OK: Go to next step. 
  3. INSPECT BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT 
    1. Check the brake fluid level in reservoir.
    2. Check for open and shot circuit in brake fluid level warning switch circuit (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. OK: Go to step 4 
    2. NG: REPAIR OR REPLACE BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT 
  4. INSPECT COMBINATION METER ASSEMBLY (BRAKE WARNING LIGHT CIRCUIT) 
    1. Check for open and short circuit in combination meter (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY 
    2. OK: Go to next step. 
  5. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR - COMBINATION METER) 
    1. Check for open and short circuit in harness and connector between brake actuator and combination meter (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: CHECK AND REPLACE BRAKE ACTUATOR ASSY (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
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