Nissan Versa

 Sedan Service Manual

Steering » Steering control system (STC)
EPS Control unit

Exploded View

1. Steering column assembly 2. Bracket 3. EPS control unit

Removal and Installation

REMOVAL

1. Perform a CPU memory erase on the EPS with CONSULT before removal.

CAUTION:

• Disconnect battery negative terminal before continuing.
• Do not shock EPS control unit, e.g. drop or hit.
• Do not get EPS control unit wet with water or other liquid. Also, do not give EPS control unit a radical temperature change to avoid getting water drops.
• Do not disassemble or remodel EPS control unit, EPS motor, torque sensor, harness and connectors.

2. Remove instrument lower panel LH. Refer to IP "Removal and Installation".
3. Disconnect harness connectors from EPS control unit.

   CAUTION: Hold and pull the connector housing, do not pull on harness when disconnecting connectors.

   Also, do not grip, collapse or apply excessive force to the connector.

4. Remove EPS control unit from steering column assembly.
5. Remove bracket from steering column assembly if necessary.

INSTALLATION

Installation is in the reverse order of removal.

• Check that harness is not damaged when installing EPS control unit. Also, check that EPS control unit is installed without trapping harness on foreign materials.
• After installing steering column assembly, perform self-diagnosis with CONSULT to ensure correct operation.

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