FRONT SUSPENSION
Pin No.
Description
Input/Output
21
22
23
24
25
26
27
28
to 31
32
33
34
35
36
Pressure transducer (earth)
Input
Input
Input
Output
Input
-
DCV 2 (earth)
DCV 1 (earth)
DCV 1 & 2 (supply)
Pressure control valve (earth)
Not used
Pressure control valve (supply)
Main supply (+ V Batt)
Not used
Output
Input
-
29
Main earth 2
-
Accelerometer - lower (signal)
Accelerometer - upper (signal)
Not used
Input
Input
-
Warning lamp
Output
Failure modes
Failures where the vehicle can still be driven safely are indicated by the ACE warning lamp illuminating continuously
with an amber colour. The amber warning lamp will remain illuminated until the ignition is turned off. For all faults the
warning lamp will only illuminate again if the fault is still present. Failures which require the driver to stop the vehicle
immediately are indicated by the ACE warning lamp flashing with a red colour and an audible warning. All faults are
recorded by the ACE ECU and can be retrieved with diagnostic equipment.
The following tables show the type of system failures and their effects on the system operation. Torsion bar 'floppy'
means that fluid is allowed to circulate freely through the system. With no pressure in the actuators the torsion bar will
have no effect on vehicle roll. 'Locked bars' means that all pump flow is directed through the valve block and returns
to the reservoir. Both DCV's close and fluid is trapped in the actuators but can flow from one actuator to the other via
the valve block. In this condition the torsion bar will perform similar to a conventional anti-roll bar, resisting roll but still
allowing the axles to articulate.
Acceleration sensors
Failure
Effect
Valve stuck closed
Short circuit - Ground
Short circuit - VBatt
Loose sensor
No ACE control
No ACE control
No ACE control
Erractic ACE activity when driving in straight line
Pressure transducer
Failure
Effect
Short circuit - VBatt
Large sensor dead band - possible random
movements
Road speed signal
Failure
Effect
Open circuit
No ACE control - 'Locked bars' condition
No ACE control - 'Locked bars' condition
No ACE control - 'Locked bars' condition
Short circuit - Ground
Short circuit - VBatt
60-20
DESCRIPTION AND OPERATION
| Categories | Land Rover Defender, Land Rover Discovery II, Range Rover |
|---|---|
| Tags | Land Rover |
| Model Year | 1999 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Discovery Series II |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)