Nissan Versa

 Sedan Service Manual

Steering » Steering control system (STC)
Diagnosis system (EPS control unit)

CONSULT Function

FUNCTION

CONSULT can display each diagnostic item using the diagnostic test modes shown following.   

*: The following diagnosis information is erased by erasing.

• DTC
• Freeze frame data (FFD)

ECU IDENTIFICATION

Displays the part number stored in the control unit.

SELF-DIAG RESULTS MODE

Refer to STC "DTC Index".

When "CRNT" is displayed on self-diagnosis result.

• The system is presently malfunctioning.

When "PAST" is displayed on self-diagnosis result.

• System malfunction in the past is detected, but the system is presently normal.

FREEZE FRAME DATA (FFD)

The following vehicle status is recorded when DTC is detected and is displayed on CONSULT.

DATA MONITOR MODE

*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.

ECU DIAGNOSIS INFORMATION

Precautions

EPS System

Diagnosis system (EPS control unit)

EPS control unit

Diagnosis and repair workflow

C1601 Battery power supply

C1604 Torque sensor

C1606 EPS Motor

C1607, C1608 EPS Control unit

C1609 Vehicle speed signal

C1610 Engine status signal

U1000 CAN Comm circuit

EPS Warning lamp

EPS Warning lamp does not turn OFF

Steering wheel turning force is heavy or light

Unbalance steering wheel turning force and return between right and left

Unbalance steering wheel turning force (torque variation)

EPS Control unit