1. DTC C0020[01] description
The EHCU monitors the internal motor relay and the motor drive circuit. When the EHCU detects a malfunction in the motor relay and the drive circuit, or that the motor is stuck ON or OFF, this DTC is set.
2. Condition for setting DTC C0020[01]
Condition for running the DTC
- The ignition switch is ON.
Condition for setting the DTC
Any of the following are met:
- The EHCU detects that the motor drive circuit is OFF when the motor relay is commanded ON.
- The EHCU detects that the motor drive circuit is ON when the motor relay is commanded OFF.
- The EHCU detects an open circuit in the motor drive circuit when the motor relay is commanded OFF.
3. Action taken when DTC C0020[01] sets
- ABS warning light illumination
- ESC warning light illumination (Models equipped with ESC)
- ABS control inhibition
- TCS control inhibition (Models equipped with ESC)
- If a malfunction occurs during the EBD control, the control is continued. However, the control is inhibited except during the EBD control.
- ESC control inhibition (Models equipped with ESC)
- HSA control inhibition (Models with ESC)
- ISS control inhibition (Models with ESC)
- Hill Descent Control inhibition (Models with ESC)
- Brake Assist control inhibition (Models with ESC)
- ESS control inhibition (Models with ESC)
- Trailer sway control inhibition (Models equipped with ESC)
- External braking request brake retention control inhibition (Models equipped with stereo cameras)
- External braking request brake pressurization control inhibition (Models equipped with stereo cameras)