Circuit Description
EBTCM monitors vehicle speed, deceleration, ABS/TCS activation and brake light on times to calculate brake rotor temperatures. When brake rotor temperatures are exceeded, TCS is disabled, DTC 38 is set and TCS OFF indicator is turned on after next TCS event. If brake usage is reduced during driving, brake rotor cooling is calculated and TCS is reenabled. Excessive braking and/or TCS could result in degraded braking performance or possible damage to rotors and/or brake pads.
DTC 38 could be set when either driven wheel estimated brake rotor temperature exceeds 700° F (375° C). If either driven wheel estimated brake rotor temperature has exceeded 700° F (375° C) during ABS or normal braking conditions, DTC 38 will not be set until next TCS activation occurs.The code will not be set and TCS will not be disabled if both rotor temperatures have cooled below 530° F (275° C) before next TCS activation. If either driven wheel brake rotor temperatures has exceeded 700° F (375°) during TCS then DTC 38 will be set immediately, but TCS will not be disabled until end of TCS event.
A malfunction code is stored. TRACTION OFF indicator is turned on and TCS is disabled as long as both driven wheel brake temperatures are greater than 530° F (275° C). If rotor temperatures cool below 530° F (275° C), then TRACTION OFF indicator will be turned off. DTC remains stored even if TCS has been has been enabled again.