Nissan Sentra manuals

Nissan Sentra Service Manual: ECU diagnosis information

EPS control unit

Reference Value

VALUES ON THE DIAGNOSIS TOOL

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable to this vehicle, refer to CONSULT display items.

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


*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: A fixed value is indicated regardless of steering turning.

*3: Normally displays 100%. In case of an excessive stationary steering, the assist curvature gradually falls.

However, it returns to 100% when left standing.

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

Terminal layout

Physical values


Physical values

Fail-Safe


Fail-Safe

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


DTC Index

*: Even if dtc is detected, eps warning lamp does not turn on


*: Even if dtc is detected, eps warning lamp does not turn on when assist torque is generated.

Diagnosis system (EPS control unit)
CONSULT Function FUNCTION CONSULT can display each diagnostic item using the diagnostic test modes shown following. Diagnostic test mode Function ECU identification The part ...

Wiring diagram
Power steering control system Wiring Diagram ...

Other materials:

Component parts
Component Parts Location IPDM E/R, (Headlamp high relay, Headlamp low relay, Taillamp relay and Front fog lamp relay (if equipped)) Stop lamp switch Parking brake switch Combination meter Combination switch (lighting and turn signal switch) BCM (view with combination meter r ...

Cowl top
Exploded view Cowl top seal Cowl top grille cap Cowl top cover Cowl top extension Cowl top extension insulator Clip EPT seal [t: 3.0 mm (0.12 in) Cowl top cover cap EPT seal [t: 5.0 mm (0.20 in)] Pawl Clip Front Removal and installation COWL TOP COVER Removal Rem ...

Preparation
Special service tools The actual shape of the tools may differ from those illustrated here. Commercial service tools Clip list Descriptions for Clips Replace any clips which are damaged during removal or installation. ...

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