ELECTRONICALLY CONTROLLED BRAKE SYSTEM FAIL-SAFE CHART

FAIL-SAFE FUNCTION OF CONTROL SYSTEM

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 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 operations of the TRC and VSC systems in order to prevent further malfunctions and to protect the systems.

   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.

FAIL-SAFE FUNCTION OF HYDRAULIC SYSTEM

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

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 (Brake booster with master cylinder assembly) malfunction.	Hydraulic brake booster (brake booster with master cylinder assembly) generates braking force.
   Hydraulic pressure controlling components malfunction.	Hydraulic brake booster (brake booster with master cylinder assembly) generates braking force.
   Power supply components (Hydraulic pressure source) malfunction.	Braking force solely generated by the driver.