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TCS Self-diagnosis
- The ABS/TCS control unit is equipped with a main CPU and a sub-CPU. Each CPU checks the other for problems.
- The CPUs check the circuit of the system.
- Self-diagnosis can be classified into two categories:
- Initial diagnosis: Done right after the engine starts and until the ABS or TCS indicator goes off
- Regular diagnosis: Done right after the initial diagnosis until the ignition switch is turned OFF
- When a problem is detected by self-diagnosis, the ABS/TCS control unit shifts to fail-safe mode.