Land Rover Discovery Lhd Models Etm 1995 4th Edition Exp Rover Manual

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM F3
Rear Wipe/Wash
3
DISCOVERY
K183
Rear Wiper Relay
0.5 NP
85
86 C281
F 18
10 AP126
Fascia Fuse Box
87
S274
C281
115
5C204
1.0 GLG
P126
Fascia Fuse Box
31 C206
S288
87a
See Fuse Details
See Ground Dis-
tribution C408 1.0 GLG
0.5 B
30
0.5 B
23 C205
Z148
Multi±Function
Unit (MFU)3
N 1
C4152
8C2779
C408 4
C415 5
0.7 B
E201 S2044
See Ground Dis-
tribution
E201
S401
See Ground Dis-
tribution
E400E402M120
Rear Wiper Motor
[1] Parked
[2] Not Parked
HJ1
86 87
87a 30 85
N
HJ11 HJ11
1.0 B 0.7 GLG
[1]
[2]
M 0.7 GO1.0 GLG
W
B 0.7 NG 
						

							REAR WIPE/WASH
4
F3   ETM
 DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUA L
TROUBLESHOOTING HINTS
11. If the washer does not operate, check the
washer fluid hoses for kinks or blockage.
12. If the wiper does not operate only when washer
is requested, check LGS wire and Multifunction
Unit (MFU) (Z148).
13. If the wiper operates with tailgate open, check
Tailgate Switch (X170) and PB wires.
14. If the sunroof operates, see section L4,
Sunroof.
15. If the washer runs continuously, replace the
Rear Screen Wash Switch (X222).
16. 
 
 

   


 

	 
 
 
 
17. If the wiper will not return to its parked position
when the ignition switch is turned off, check
sunroof operation within 45 seconds after
turning the ignition off. If the sunroof does not
operate check Sunroof Load Relay (K138) and
Window Lift ECU (Z147), otherwise check Rear
Wiper Motor (M120).
SYSTEM DIAGNOSIS
1. If the wiper does not operate, do Test A.
2. If the washer does not operate, do Test B.
3. If the wiper runs with Rear Screen Wipe Switch
(X221) off, do Test C. 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM   F3
Rear Wipe/Wash
5
DISCOVERY
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Rear Screen
Wipe Switch




	 
	


Z148
Multi±Function
Unit (MFU)C205

Rear Screen
Wipe Switch %
1 2 3 4 5 6 7 8 9 10 11 12
19 20 21 22 23 24 1415 16 17 18 13








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							1 2 3 4 5 6 7 8 9 10 11 12
19 20 21 22 23 24 1415 16 17 18 13
ELECTRICAL TROUBLESHOOTING MANUA L
F3   ETM
Rear Wipe/Wash
6
DISCOVERY




	
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Rear Wiper Relay
Z148
Multi±Function
Unit (MFU) 
C205
1 2 3 4 5 6 7 8 9 10 11 12
19 20 21 22 23 24 1415 16 17 18 13
Z148
Multi±Function
Unit (MFU) 

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							ELECTRICAL TROUBLESHOOTING MANUAL
ETM   F3
Rear Wipe/Wash
7
DISCOVERY



 	

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Rear Wiper Relay )
Rear Wiper Motor )  $ )

K183
Rear Wiper Relay
 	
K183
Rear Wiper Relay

	

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							ELECTRICAL TROUBLESHOOTING MANUA L
F3   ETM
Rear Wipe/Wash
8
DISCOVERY







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M119
Rear Screen
Wash Pump

 
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Wash Pump $ 	   



  
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Rear Screen
Wash Switch
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Rear Screen
Wash Pump
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							Z148
Multi±Function
Unit (MFU)
ELECTRICAL TROUBLESHOOTING MANUAL
ETM   F3
Rear Wipe/Wash
9
DISCOVERY
  ! 
	
 	







! !
	
	
 
	





! !
	
	
 
	Rear Screen
Wipe Switch #

 


	
 	
Z148
Multi±Function
Unit (MFU)C205
Multi±Function
Unit (MFU) #
1 2 3 4 5 6 7 8 9 10 11 12
19 20 21 22 23 24 1415 16 17 18 13
C205
1 2 3 4 5 6 7 8 9 10 11 12
19 20 21 22 23 24 1415 16 17 18 13
 V
   !
 








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Rear Wiper Relay #  
						

							HJ11
P126
Fascia Fuse Box
ELECTRICAL TROUBLESHOOTING MANUAL
ETM F8
1
DISCOVERY
15
F 13
10 A
86
85 8730 P126
Fascia Fuse Box
K122
Heated Rear
Screen Relay
 See Ground Dis-
tribution
18 C27732 C206 1
S288
S237 0.5 BO
0.5
NP 0.5 B
1.5 NP
2.5 NP2.5 NP
A
F8-2  
1.5 NP
B
F8-2 Interior Lamps
18 C208
Z148
Multi±Function
Unit (MFU)
P126
Fascia Fuse BoxZ148
Multi±Function
Unit (MFU)
0.5 G
3 C215 2 C205
C208
30
F 1
30 AP125
Engine Compart-
ment Fuse Box  
3.0 OS1 C101
P126
Fascia Fuse Box
31 C2069 C211
E201
1 C438
1 C454
1
C409 2.5 B
[1]
1 C435
E401
1 C453 2.5 B
2 C438
2C264 0.5 RN
51
0
 See Ground Dis-
tribution S2059
E201
0.5 B
4 C264
X132
Heated Rear
Screen Switch
B141
Rear Screen E
J
0.5 BG
C215
12 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
F8 ETM
2
DISCOVERY
A
F8-1
1.5 NP
1.5 BG
S501
See Ground Dis-
tribution
E201
0.5 B
1C511
1 C512B119
Left Mirror
Demister 10 C502
BR
B
1 C503
2 C503
B
F8-1
1.5 NP
1.5 BG
S601
See Ground Dis-
tribution
E200
0.5 B
1C611
1 C612B133
Right Mirror
Demister 10 C602
BR
B
1 C603
2 C603 
						

							MULTI±FUNCTION UNIT (MFU)
1
ETM   G4
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUALREV: 01/98
CIRCUIT OPERATION
Multi±Function Unit (MFU)
The multi±function unit (MFU) is mounted on the
rear of the passenger compartment fusebox and
has an input to operation of the following:

Heated rear screen

Courtesy lights

Side and headlights

Rear fog guard lamps

Headlamp power wash

Front wipers

Rear wash/wipe
Diagnostic Procedure
1. Close all doors and the tailgate.
NOTE: If the oil pressure switch goes open
circuit (engine is started) during the following
procedure, the MFU will exit the diagnostic mode
immediately.
2. Press and hold the heated rear screen switch
and switch on the ignition.
3. Release the heated rear screen switch within 2
seconds and the MFU will beep to indicate that its
in diagnostic mode 1.
4. Press the heated rear screen switch; the MFU
will beep twice. In turn, operate each of the
following switches, rear fog guard lamps, side
lights, headlights, front wiper, and rear wiper. The
MFU will beep twice each time a switch is
operated.
5. Pressing the heated rear screen again will
cause the MFU to enter diagnostic mode 2.
6. The MFU will provide outputs to the following in
order given below:

Heated rear screen relay energised for 2
seconds

Courtesy lights energised for 2 seconds

Dim dip relay energised for 2 seconds

Rear fog guard lamp energised for 2 seconds

Headlamp power wash energised for half a
second
Front wiper energised for half a second

Rear wipe/wash energised for half a second
7. The MFU will then exit the diagnostic mode.