Workshop Manuals Factory service & repair Land Rover
Land Rover Discovery II (UK)30 · Front suspension
30 · Steering & suspension

Road speed signal (Front suspension)

Make
Land Rover
Model
Discovery II (UK)
Section
Description and operation › Road speed signal
Front suspensionRoad speed signal

Road speed signal

FailureEffect
Open circuitNo ACE control - 'Locked bars' condition
Short circuit - GroundNo ACE control - 'Locked bars' condition
Short circuit - VBattNo ACE control - 'Locked bars' condition

Engine speed signal

FailureEffect
Open circuitNo ACE control - 'Locked bars' condition
Short circuit - GroundNo ACE control - 'Locked bars' condition
Short circuit - VBattNo ACE control - 'Locked bars' condition

Reverse gear signal

FailureEffect
Open circuitNo reverse signal to ECU. ACE active in reverse, may give abnormal handling when reversing
Short circuit - GroundNo reverse signal to ECU. ACE active in reverse, may give abnormal handling when reversing
Short circuit - VBattPermanent reverse signal to ECU. Permanent 'Locked bars' condition

Ignition ON signal

FailureEffect
Open circuitECU does not receive ignition ON signal. No ARC control, 'Locked bars' condition
Short circuit - GroundECU does not receive ignition ON signal. No ARC control, 'Locked bars' condition
Short circuit - VBattPermanent ignition ON signal to ECU. Possibility of flat battery

Pressure control valve failure

FailureEffect
Open circuitNo ACE control
Short circuit - GroundNo ACE control
Short circuit - VBattNo ACE control
Valve stuck openNo ACE control
Valve stuck closedMaximum system pressure - no proportional control. Pressure relief valve operating at 185 bar (2683 lbf.in2)

Parts & tools for this job For Land Rover Discovery

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