Trouble Judgment

Check Conditions 

• The power supply circuit system DTC C1540, C1541 is not set.
• The engine circuit system DTC is not set.

Judgment Criterion 

• The engine speed signal sent to the EPS-ECU is 0 r/min.
• The engine speed signal is not sent from the engine control module (ECM), and the microcomputer determines that there is a problem in the engine speed measurement system.

Fail Safe, Back Up Function 

• The electric power steering-ECU illuminates the electric power steering warning display, and sets the DTC No. C1561. Normally the assist operation is continued while the vehicle is driven, but deactivated after the vehicle stopped.