Land Rover Discovery: Power Steering - Overview
COMPONENT LOCATION
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- Steering gear
- Steering column intermediate shaft
- Heat shield
Overview
The vehicle is fitted with electric power steering, provided by a ZF
Servolectric steering gear unit with variable ratio, rack and pinion steering
and speed sensitive power assistance. Power assistance is from an electric
motor attached to the steering gear.
The steering gear also incorporates:
- A Power Steering Control Module (PSCM), on the end of the electric
motor.
- A reduction gear.
- A torque sensor on the gear mechanism.
Power assistance is controlled by the PSCM, which uses the electric motor
to apply an axial force on the steering rack via the reduction gear. The level
of power assistance depends on the:
- steering torque applied with the steering wheel,
- vehicle speed, and
- terrain response mode selected.
The PSCM also uses the electric motor to provide the following assistance
features:
- Pull drift compensation.
- Assistance changes during Eco Stop/Start functions.
- Assistance reduction if system overheats.
- Assistance reduction if supply voltage is too low or high.
- Assistance reduction for system stability optimization.
- Soft end stops.
- Park assist support / interface (where fitted).
For additional information, refer to: Parking Aid (413-13 Parking Aid,
Description and Operation).
READ NEXT:
Steering Gear
Recirculating ball nut
Steering rack
Pinion shaft
Torque sensor
Boot (2 off)
Track rod (2 off)
Threaded boss for securing bolt (2 off)
Signal and power lead for torque sensor
For the electric power steering system to provide assistance the engine
must be running - with one exception - see: ASSISTANCE CHANGES
DURING ECO STOP/START FUNCTIONS, below.
If a fault occurs which a
SEE MORE:
Removal
NOTE:
The A-pillar reinforcement is installed in conjunction with:
Front bumper cover
Hood
Front fender
Fender splash shield
Front door
Instrument panel
Windshield glass
Headliner
Side air curtain module
Front scuff plate trim panel
A-pillar trim panel
A-pillar outer panel
Fro
REMOVAL
WARNING:
Cooling fans may continue to operate after the engine is turned off.
They may also start to operate after the engine is turned off and
continue operating for up to 10 minutes.
CAUTION:
Be prepared to collect escaping coolant.
NOTES:
Removal steps in this procedure may contain ins