Range Rover 2. Electrical Manual - part 41

RADIO

E6

32

TROUBLESHOOTING

PB

X269
Steering Wheel
Switches

Test J

OK

OK

PROBLEM CAUSE

1J

CONDITIONS

Ignition Switch

RESULTS

Less than 1 ohm

PB, B Wire

-

D

Rotary Coupler













C247

-

Position: 0

Less than 1 ohm

OK

OK

2J

CONDITIONS

Ignition Switch

Position: 0

RESULTS

D

2J

PROBLEM CAUSE

SO Wire

-

Y Wire

Rotary Coupler

PROBLEM CAUSE

Radio

-

Steering Wheel
Switches

-

-

-

X269
Steering Wheel
Switches

Y













C247

SO

C226

Z111
Radio

WASH/WIPE

F5

CIRCUIT OPERATION

1

CIRCUIT OPERATION

Front Wipers

The front wipers will only operate with auxiliary or
ignition on, except when auxiliary and ignition are
both turned off,  the wipers will continue to operate
until they reach the park position. If the engine is
cranked while the wipers are on, then the wiper
operation will be suspended until cranking is
released.

Flick Wipe Operation

When the flick wipe switch is operated, the wiper will
operate in the slow wipe mode until the switch is
released.

Intermittent Operation

When the wiper control stalk is moved to the
intermittent position, the wipers will perform one wipe
of the screen at slow speed and then wait for N
seconds before doing another wipe etc. The value of
N is determined by the position of the wipe delay
potentiometer. When the potentiometer is in the far
left position the time delay is 2 seconds. Each
movement of the potentiometer to the right doubles
the time delay, up to a maximum of 32 seconds.

Slow Speed Operation

When the wiper control stalk is moved to the slow
position, the wipers will operate continuously at slow
speed.

Fast Speed Operation

When the wiper control stalk is moved to the fast
position, the wipers will start operating at fast speed
immediately and will continue to do so until fast
speed is switched off.

Front Screen Programmed Wash/Wipe

If the wash/wipe switch is operated, the front screen
wash motor will operate for 1.5 seconds or for the
duration the switch is held on, whichever is the
longer.

The slow front wipe will be operated for 0.5 seconds
after the switch is closed and will continue to operate
until three full wipes have been completed after the
wash motor has ceased it’s operation.

Rear Wiper

Intermittent Operation

When the rear wiper stalk is moved to the “on”
position, then the rear wiper will perform two
complete wipes and stop in the park position. After

that, its operation will vary depending on the
selected mode of the front wipers.

Reverse Gear Wiping

If reverse gear is selected while auxiliary or ignition
is on and a front wiper function is selected, then the
rear wiper will operate as well.

If reverse gear is selected while the front wipers are
off (or performing a wash/wipe cycle) then the rear
wiper will operate in the mode indicated by the rear
wiper switch.

Rear Screen Programmed Wash/Wipe

If the rear wash/wipe switch is operated, the rear
screen wash motor will operate for 1.5 seconds or
for as long as the switch is held on, whichever is the
longer. The rear wipe will be operated 0.5 seconds
after the switch closed and will continue to operate
until three full wipes have been completed after the
washer motor has ceased it’s operation.

Wiper Operation With Speed Dependency On

If the vehicle has speed dependent wipers, the wiper
adapts its speed to the vehicle speed.

The speed barrier, where the wipers move between
a faster or slower operation, is 2 mph.

Headlight Wash/Wipe

If the headlight switch is in the on position, the first
and every alternate operation of the front screen
wash switch will activate the headlight wash/wipe
motor, which will operate for 2 seconds, regardless
of the length of time the switch is pressed.

WASH/WIPE

F5

2

CIRCUIT DIAGRAM

Z328
Body Electrical
Control Module
(BECM)

13

C120

LGB

16

WG

5

RLG

15

ULG

11

OP

4

LGO

13

OB

1

LGB

C257

X272
Wash/Wipe Switch

[1]

Front Wipe Switch 1

[2]

Front Wipe Switch 2

[3]

Front Wipe Switch 3

[4]

Intermittent Potenti-
ometer

[5]

Front Wash

[6]

Rear Wipe

[7]

Rear Wash

1

C193

2

C193

M

S111

See Ground Dis-
tribution

E181

B

M105
Front Screen
Wash Pump

28

C116R

YG

11

C114

Z108
Anti–Lock Brake Sys-
tem ECU

C116L

LHD
RHD

1 =

0 =

Switch Closed

Switch Open

Fast Wipe

Mist

Off

Intermittent

Slow Wipe

S1 S2 S3

1

0

0

0

0

0

0

1

0

0

1

1

0

0

1

7

0

[1]

2

5

3

4

1

8

C237

6

C237

B

E252

S207

0

[2]

0

[3]

0

[4] 0

[5]

0

[6]

0

[7]

See Ground Dis-
tribution

WASH/WIPE

F5

3

CIRCUIT DIAGRAM

30

F 25

20 A

RL1

[1]

2

3

1

5

6

C175

4

RL8

[8]

2

5

1

3

4

7

5

8

2

C172

P125a
Engine Compart-
ment Fuse Box

[1]

Front Wiper
Control
Relay

[8]

Front Wiper
Interval
Relay

8

C113

Z238
Body Electrical
Control Module
(BECM)

7

3

C114

KLG

NLG

NLG

1

C127R

C127L

3

2

M

[2]

[1]

M107
Front Wiper
Motor

[1]

Parked

[2]

Not parked

4

C127R

C127L

LHD

RHD

LHD
RHD

B

ULG

RLG

B

S113

E148

See Ground Dis-
tribution

S114

E167

See Ground Dis-
tribution

LHD

RHD