ELECTRONICALLY CONTROLLED BRAKE SYSTEM > FAIL-SAFE CHART

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1. When a malfunction is detected in the brake control system, the skid control ECU turns the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indicator lights come on, as well as prohibits ABS, BA, TRC and VSC operations.
   

2. If the skid control ECU detects that a system related to the hybrid control system is malfunctioning, it will prohibit operation of the TRC and VSC system in order to prevent further malfunctions and to protect the system.
   
   

   Item	Operation
   Malfunction in the ABS system	ABS, BA, TRC and VSC control prohibited
   Malfunction in the BA system	ABS, BA, TRC and VSC control prohibited
   Malfunction in the EBD system	ABS, EBD, BA, TRC and VSC control prohibited
   Malfunction in the TRC system	ABS, BA, TRC and VSC control prohibited
   Malfunction in the VSC system	ABS, BA, TRC and VSC control prohibited

1. If a malfunction is detected in the brake booster with master cylinder (skid control ECU or brake actuator) or an individual sensor, control will be stopped and brake effort will be generated by the brake booster with master cylinder (hydraulic brake booster).
   

2. If brake control is stopped due to a malfunction in the hydraulic pressure source, the pressure generated in the master cylinder by the driver is applied to the wheel cylinders to ensure braking force.
   
   

   Item	Operation
   Skid control ECU malfunction	Brake booster with master cylinder (hydraulic brake booster) generated braking force
   Hydraulic pressure controlling components malfunction	Brake booster with master cylinder (hydraulic brake booster) generated braking force
   Power supply components (Hydraulic pressure source) malfunction	Braking force solely generated by the driver