Inspection Procedure 2

Inspection Procedure 2: ASC OFF Indicator Light Flashes at a Rate of 2Hz.

SYSTEM OPERATION
When ASC OFF indicator light flashes at a rate of 2 Hz, traction control by brake force is prohibited.

TECHNICAL DESCRIPTION (COMMENT)
This operation is performed for the following reasons and is not a malfunction.
^ ASC-ECU calculates the estimated temperature of the brake pad. In general, as the brake pad temperature increases, the coefficient of friction for the brake pad becomes smaller, resulting in the reduced braking force. When the estimated temperature of the brake pad exceeds the specification, ASC-ECU flashes the ASC OFF indicator light at a rate of 2 Hz to warn the driver that the controllability of TCL is decreased by the reduced braking force. Consequently, ASC-ECU prohibits the traction control by brake force until it determines that the estimated temperature of the brake pad is at normal value.

TROUBLESHOOTING HINTS (The most likely causes for this case:)
^ Overheat of brake pad