EPS control unit

Reference Value

VALUES ON THE DIAGNOSIS TOOL

CAUTION:
The output signal indicates the EPS control unit calculation data. The normal values will be displayed even in the event that the output circuit (harness) is open.

*1: Almost in accordance with the value of “MOTOR SIG”. It is not a malfunction though these values are not accorded when steering quickly.

*2: Normally displays 100%. In case of an excessive stationary steering, the assist curvature gradually falls. However, it returns to 100% when left standing.

*3: It is not a malfunction, though it might not be corresponding just after ignition switch in turned ON.

*4: Displays NORMAL in models without Nissan Dynamic Control System.

TERMINAL LAYOUT

PHYSICAL VALUES

Fail-Safe

• If any malfunction occurs in the system, and control unit detects the malfunction, EPS warning lamp on combination meter turns ON to indicate system malfunction.

• When EPS warning lamp is ON, enters into a manual steering state. (Control turning force steering wheel becomes heavy.)

Protection Function

EPS control unit decreases the output signal to EPS motor while extremely using the power steering function (e.g., full steering) consecutively for protecting EPS motor and EPS control unit (Overload protection control).

While activating overload protection control, the assist torque gradually decreases, and the steering wheel turning force becomes heavy. The normal assist torque is recovered if the steering wheel is not turned for a while.

DTC Inspection Priority Chart

When multiple DTCs are detected simultaneously, check one by one depending on the following priority list.

DTC Index