TCS Indicator Light Does Not Go Off

The TCS indicator light does not go off after the engine starts.

NOTE:
- When the engine is started, a system check is performed. The TCS indicator light will go off if the system is normal.
- If the back-up power supply is less than 8 Volts to the TCS control unit 26P connector terminal 1A, the system check is stopped and TCS indicator light comes on.