Workshop Manuals Factory service & repair Land Rover
01 Discovery Series II - Workshop Manual - 1999MY ON - 6th Edition - NAS02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 INTRODUCTION32 33 GENERAL INFORMATION34 35 GENERAL DATA36 IDENTIFICATION NUMBERS37 38 TORQUE WRENCH SETTINGS39 40 LIFTING AND TOWING41 CAPACITIES, FLUIDS, LUBRICANTS AND SEALANTS42 43 44 MAINTENANCE45 46 ENGINE - V847 48 EMISSION CONTROL - V849 50 ENGINE MANAGEMENT SYSTEM - V851 FUEL DELIVERY SYSTEM - V852 53 COOLING SYSTEM - V854 55 MANIFOLDS AND EXHAUST SYSTEMS - V856 57 58 59 CLUTCH - V860 61 MANUAL GEARBOX - R38062 63 TRANSFER BOX - LT230SE64 65 66 AUTOMATIC GEARBOX - ZF4HP22 - 2467 PROPELLER SHAFTS68 69 REAR AXLE70 71 72 73 74 75 FRONT AXLE76 77 78 79 STEERING80 FRONT SUSPENSION81 82 83 REAR SUSPENSION84 85 86 87 BRAKES88 RESTRAINT SYSTEMS89 90 DOORS91 EXTERIOR FITTINGS92 93 INTERIOR TRIM COMPONENTS94 SCREENS95 96 97 SEATS98 99 SUNROOF100 CHASSIS AND BODY DIMENSIONS101 102 103 104 PANEL REPAIRS105 106 107 108 BODY SEALING MATERIALS109 110 111 112 113 CORROSION PREVENTION AND SEALING114 PAINTING115 HEATING AND VENTILATION116 117 AIR CONDITIONING118 119 WIPERS AND WASHERS120 CHARGING AND STARTING121 122 LIGHTING123 BODY CONTROL UNIT124 125 126 ALARM SYSTEM AND HORN127 128 WINDOWS129 IN CAR ENTERTAINMENT130 HARNESSES131 DRIVING AIDS132 NAVIGATION SYSTEM133 INSTRUMENTS
Land Rover Discovery II119 · WIPERS AND WASHERS
119 · Electrical

WIPERS AND WASHERS (Operation): DESCRIPTION AND OPERATION

Make
Land Rover
Model
Discovery II
Section
DESCRIPTION AND OPERATION › Operation
WIPERS AND WASHERSOperation
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WIPERS AND WASHERS

DESCRIPTION AND OPERATION

84-17

Operation

Front intermittent wipe variable delay 
The front intermittent wipe variable delay operation allows the driver to adjust the interval between wipes to suit local 
conditions. Front variable delay operation activates when the following conditions are met:

l

Ignition switch in position I or II.

l

Front wash/ wipe switch is in the intermittent position.

The BCU receives the front intermittent wipe signal from the front wash/ wipe switch.  The BCU receives a separate 
signal from the variable delay switch, determines the delay interval from the front wash/ wipe switch position and 
passes it on to the IDM.  The IDM energises the front wiper relay to activate the front wiper motor.

If the delay duration is decreased during front variable delay operation, the wipers immediately operate once and then 
the delay cycle is reset to the new duration.

If the delay duration is increased during front variable delay operation, the delay cycle is automatically increased by 
the BCU.

Front low speed 
Front low-speed operation activates when the following conditions are met:

l

Ignition switch is in position I or II.

l

Front wipe/ wash switch is in low speed position.

Selecting low-speed on the front wash/ wipe switch signals the IDM to energises the front wiper relay, which provides 
power to the front wiper motor assembly.

Front high speed 
Front high-speed operation activates when the following conditions are met:

l

Ignition switch is in position I or II.

l

Front wipe/ wash switch is in high speed position.

Selecting high speed on the front wash/ wipe switch allows power to flow from the switch directly to the wiper motor.  
The high-speed input goes to a set of brushes in the wiper motor that are closer together than the low speed brushes.  
These brushes allow the motor to run at a faster speed but with less torque. 

Front washer 
Front washer operation will only activate when the following conditions are met:

l

Ignition switch is in position I or II.

l

Front washer switch operated.

Flicking the front washer switch energises the front washer pump motor for 0.4 second.  Holding the front washer 
switch for longer than 0.4 second allows the front washer pump motor to run as long as the switch is held.

There are two front washer configurations. If the vehicle is fitted with programme wash/ wipe, and the front washer 
pump motor is active for more than 0.5 second, the front wipers operate at low speed. The wipers continue to operate 
for 4 seconds after the washer switch is released. In some markets, the driver must activate the front wipers after a 
front washer operation.

The front washer operation has a higher priority than the variable delay operation.  This means that if intermittent wipe 
is active when a front washer operation is initiated, the wash cycle executes and the intermittent wipe is re-instated 
at the end of the wash operation.

Parts & tools for this job Staging For Land Rover Discovery

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