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

							INSTRUMENTS
6
E1   ETM
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUA L


 	


8. If no instruments operate, do Test A.
9. If the coolant temperature gauge reads hot with
coolant cool, do Test B.
10. If the coolant temperature gauge reads cool
with coolant hot, do Test B.
11. If the fuel gauge reads empty with fuel in the
tank, do Test C.
12. If the fuel gauge reads full when the tank is
empty, do Test C.
13. If the speedometer does not operate, do 
Test D.
14. If the tachometer does not operate, do Test E. 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E1
Instruments
7
DISCOVERY
$% 

	 
 

! % !  %

 

 	
Z142
Instrument
Cluster




 # (

(

 
&$
	


	 

Z142
Instrument
Cluster





! % !  %

 

		 



 # (
(
Instrument
Cluster

 
  












	 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
E1 ETM
Instruments
8
DISCOVERY
%& 
X114
Engine Coolant
Temperature
Gauge Sensor

 



 

	



&# (&
	
 



 

Engine Coolant
Temperature
Gauge Sensor 

%&$!&  %&$$ )
)) 

)
Coolant Tem-
perature Gauge


 

Z134
Fuel Pump Mod-
ule


	



&# (&
	
 




$ ) 

)

%&$!&  %&$
)
 
 
 
%& 











 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E1
Instruments
9
DISCOVERY


 
 
 
 	
$!)!%$ ,!) 
 










! ..
Fuel Pump Mod-
ule

 
 

 


	

	
$!)!%$ ,!) 
 


  
	 

 



() 	

 )%

!( + !
   
.
 !
.
 !
.
Vehicle Speed
Sensor.
$()*#$) *()
.
&%#)
 

*$  !+ ,  -  $
	



Z142
Instrument
Cluster










Z134
Fuel Pump Mod-
ule 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
E1 ETM
Instruments
10
DISCOVERY
 

K184
Phase Tap Resis-
tor

	
	

 




   
	
	
 


#
# 




 
  #
Phase Tap Resis-
torGenerator
# !  !  #
Tachometer








 
 
						

							WARNINGS AND INDICATORS  (EXCEPT NAS)
1
ETM E2
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUAL
CIRCUIT OPERATION
Charge Warning Light
The charge warning light receives battery voltage
with the Ignition Switch (X134) in position II. This
warning light is grounded by the Generator (Z106)
if the Generator is not producing normal power
output or the Generator stops turning.
ABS Warning Light
The ABS warning light receives battery voltage with
the Ignition Switch (X134) in position II. It is
grounded by the Anti±Lock Brake System ECU
(Z108) or the ABS Warning Relay (K103) in the
event of an ABS problem.
Brake Warning Light
The brake warning light receives battery voltage
with the Ignition Switch (X134) in position II. It is
grounded by the Brake Fluid Level Switch (X111)
when the brake fluid level is low. It may also be
grounded when the Handbrake Switch (X191) is
closed.
Oil Pressure Warning Light
The oil pressure warning light receives battery
voltage with the Ignition Switch (X134) in position
II. If the engine oil pressure is very low, the Oil
Pressure Switch (X149) will apply ground to the
warning light.
Transmission/Transfer Box Oil Temperature
Warning Light
The transmission/transfer box oil temperature
warning light is grounded by the Automatic
Transmission Oil Temperature Switch (X108) when
the temperature of the transmission fluid exceeds
1305C (2665F). The warning light is also grounded
by the Transfer Box Oil Temperature Switch (X174)
when the temperature of the transfer box fluid
exceeds 1455C (2665F).
MFI±V8 AND 300Tdi With EDC
Malfunction Indicator Lamp (Check Engine)
The Malfunction Indicator Lamp (Check Engine) is
grounded by the Engine Control Module (ECM)
(Z132) when a diagnostic trouble code is set.
Diesel
Glow Plug Indicator
The Glow Plug Indicator is grounded by the Glow
Plug Timer Unit (Z135) to indicate that the Glow
Plugs have been activated. 
						

							WARNINGS AND INDICATORS (EXCEPT NAS)
2
E2 ETM
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUA L
Hazard Indicator
If the Hazard Switch (X220) is depressed, a pulsing
voltage is applied to the Hazard Indicator which is
permanently grounded by ground E201.
Direction Indicator
If the Direction Indicator Switch (X116) is turned
on, a pulsing vgoltage is applied from the Flasher
Unit (Z128) to the Direction Indicator which is
permanently grounded by ground E201.
Trailer Indicator
With the Direction Indicator Switch (X116) turned
on, the Flasher Unit (Z128) also applies a pulsing
voltage to the Trailer Indicator which is permanently
grounded by ground E201.
SRS Indicators
The SRS Indicators are controlled by the Air Bag
Diagnostic Control Module (Z151) and the SRS
Indicator Control Circuit of the Instrument Cluster
(Z142) to indicate SRS System faults.
Low Fuel Warning Indicator
When the fuel gauge senders resistance falls
below approximately 25 Ohms (6 liters/1.5 US
gallons), the Low Fuel Warning Indicator will
illuminate to warn the driver.
Main Beam Indicator
With the Headlamps turned on the Main Lighting
Switch (X145), battery voltage is applied to the
Main Beam Indicator which is also permanently
grounded by ground E201.
Differential Lock Indicator
The Differential Lock Indicator receives battery
voltage with the Ignition Switch (X134) in position
II. It is grounded by the Differential Lock Switch
(X238) when the Differential is locked.
Fasten Seat Belt Indicator
The Fasten Seat Belt Indicator receives battery
voltage with the Ignition Switch (X134) in position
II.The indicator is also grounded through the
Multifunction Unit (MFU) (Z148) and the Drivers
Seat Buckle Switch (X120).
If the Drivers Seat Belt is buckled the Drivers Seat
Belt Buckle Switch opens and the Indicator turns
off. 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E2
Warnings and Indicators (except NAS)
3
DISCOVERY
 X220
Hazard Switch
0.5 LGG
A
E2-10
Instruments
Z142
Instrument
Cluster
8 C207
0.5 BZ128
Flasher Unit
See Ground Dis-
tribution
1 C221
0.5 B10 C222
0.5 B
S207
356d
F 4
10 AP126
Fascia Fuse Box
1 C254
0.5 LGU
Warnings and
Indicators
C267
9463
0.5 G0.5 UW
12 C208
E201
C207 Direction Indica-
tor LampsW/L 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
E2 ETM
Warnings and Indicators (except NAS)
4
DISCOVERY
0.5 RN
Z142
Instrument
Cluster
[13] Illumination
0.5 B1
E201
C221
[13]
0.5 RN
0.5 B8 C2070.5 B10 C222
7 9 C222
S207
Interior Lamps
Instruments
Warnings and
Indicators
See Ground Dis-
tribution 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E2
Warnings and Indicators (except NAS)
5
DISCOVERY
P126
Fascia Fuse Box15
10 A
Z142
Instrument
Cluster 0.5 LG
S214
15 C217
2 0.5 RS
1 C222
12 C217
2 C159
6 C209 0.5 PO
7 C221
Z135
Glow Plug Timer
Unit
2 C222
Instruments
MALFUNCTION
INDICATOR LAMP
(CHECK ENGINE)Diesel 5 C208F 14
L
Warnings and
Indicators
See Fuse Details
0.5 RS
10 C2430.5 RS
4 C243
Z132
Engine Control
Module (ECM)Z132
Engine Control
Module (ECM)
0.5 BY
MFI±V8 300Tdi with EDCMFI±T16
300Tdi without
EDC
Not used