Land Rover Range Rover Classic Etm 1995 2nd Edition Exp Rover Manual

							COMPRESSOR CONTROLS
2
K2 ETM
1995 RANGE ROVER
ELECTRICAL TROUBLESHOOTING MANUA L
Compressor Control (Diesel)
With the Ignition Switch (X134) in position II, battery
voltage is applied to the Ignition Load Relay (K127).
The relay is energized, applying battery voltage to the
Compressor Clutch Relay (K108).
When the Fan Speed Switch (X179) is turned to
positions I, II, III, or IV and the Front A/C Switch
(X225) is turned On, ground is provided to terminal
86 of the Compressor Clutch Relay (K108) through
the closed contacts of the A/C Dual Pressure
Switch (X102), The Front A/C Evaporator
Temperature Switch (X101), and the Compressor
Clutch Cut±out Switch (X259).
The relay is energized, applying battery voltage to
the Compressor Clutch (K107). Compressor Clutch
operation is now controlled by the status of the A/C
Dual Pressure Switch (X102), the Front A/C
Evaporator Temperature Switch (X101) and the
Compressor Clutch Cut±out Switch (X259).
The Front A/C Evaporator Temperature Switch
(X101) is fitted in the airflow out of the front
evaporator to sense the temperaure of the exterior
fins. Should ice begin to form, due to low
temperature, the switch will open. The A/C Dual
Pressure Switch (X102) monitors refrigerant
pressure in the high pressure line, should pressure
become too high or too low the switch will open.
When one or more of these switches open, the
ground supply to terminal 86 of the Compressor
Clutch Relay (K108) will be interrupted. The relay
de±energizes, removing battery voltage from the
Compressor Clutch (K107), disengaging the
Compressor. 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls
3
1995 RANGE ROVER
S274
15
F 18
10 A
5 C204
E200
See Fuse Details
A
K2-6
P126
Fascia Fuse Box
1.0 LGP
85
30
87a C2007
1.5 YO
15 C215
1 C251
K127
Ignition Load
Relay
X125
Fuel Flap Re-
lease Switch
S2271.5 WG87
B
K2-4
Z211
Fan Timer Diode
0.5 GW 7 C2073
1.25 UR Cooling Fans
See Ground Dis-
tributionS229
1C116
See Fuse Details
3.0 NG
30 C2007
30
F 3
30 AP125
Engine Compart-
ment Fuse Box
85
86 87 87a
86
K2-5Petrol
Diesel
1.0 YO 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls (Petrol)
4
1995 RANGE ROVER
S296
30
F 3
30 A
E100
See Fuse Details
C217
30
8786
85
86 C241
1.0 BG
85 C241 87
0.5 BS
33 C24321
30
30
87
85
86
85 C242
86 C242 87
1.5 WG
18 C217
B
K2-3
0.5 YB
11 C217
0.5 YB
9
0.5 G
0.5 L
1 C2076 K108
Compressor
Clutch Relay
Z132
Engine Control
Module (ECM)
1 C2077
8 C2073
0.5 NO S295
6 C216
Not used
1 C145
2 C145B
1.0 B
K107
Compressor
Clutch
See Ground Dis-
tribution 1C116
0.5
GY
P125
Engine Compart-
ment Fuse Box
C
K2-6K170
A/C Logic Relay 1.0 NG
[1] [2] 16
30
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0
C (32
F)
[2] < 0
C (32
F) C2073 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls (Diesel)
5
1995 RANGE ROVER
30
F 3
30 A
1C116
E100
See Fuse DetailsP125
Engine Compart-
ment Fuse Box
1.0 NG
30
30
86 C241
0.5 G
11 C217
2 C162
K108
Compressor
Clutch Relay
X259
Compressor
Clutch Cut±out
Switch
16 C217
See Ground Dis-
tribution
0.5 WG
85 C241
87
87
1.0 BG18 C217
B
K2-3
1 C162
0.5 YB
0.5 YB
9 C2073
0.5 G
1 C2076
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0
C (32
F)
[2] < 0
C (32
F)
8 C2073
1 C2077
0.5 L
0.5 NO
6 C216
Not used
1 C145
K107
Compressor
Clutch
0
2 C145
B
1.0 B
85
86
C
K2-6[1]
[1] [2] S295 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
6
1995 RANGE ROVER
S2038
52 C2025
1.25 UR
10 C2067K2-3
2 C2022 2 C2067
See Ground Dis-
tribution
S263
1.0 UR
0.5 UR
Blower Controls
Interior Lamps
0.5 LG
01
13 C2025
0.5 WB
S244
E200
0.5
NBlower ControlsS2056
2.0 N
See Ground Dis-
tribution
E200
1 C2022
0III
III
IV
1 C2067
Cooling Fans
4 C20730.5 PB
1 C181
X102
A/C Dual Pressure Switch
[1] > 32 Bar (455 psi)
[2] < 2.07 Bar (30 psi) 0.5 NO
2 C181Diesel Petrol
[1] [2]
Z210
Condenser Fan Control
Diode 2
X179
Fan Speed
SwitchX225
Front A/C Switch
C
K2-5 K2-4
0.5 YB
0.5 NW
1.0 NW
4
1.0 N
0.5 N
0.5 N
2 C2027
A
0.5
PB 
						

							COMPRESSOR CONTROLS
7
ETM K2
1995 RANGE ROVER
ELECTRICAL TROUBLESHOOTING MANUAL
TROUBLESHOOTING HINTS
6. If the Front Blower Motor (M101) does not
operate normally, refer to Blower Controls,
Section K1.
7. Check Fuse F3 of the Engine Compartment
Fuse Box (P125) and Fuse F18 of the Fascia
Fuse Box (P126).
8. Verify that refrigerant pressure is OK before
preceeding with the following diagnostic text.
SYSTEM DIAGNOSIS (PETROL)
1. If the A/C Compressor Clutch (K107) does not
engage in any mode, do Test A.
2. If the Compressor Clutch (K107) remains
engaged with the A/C off, do Test D.
SYSTEM DIAGNOSIS (DIESEL)
1. If the A/C Compressor Clutch (K107) does not
engage in any mode, do Test B.
2. If the Compressor Clutch (K107) remains
engaged with the A/C off, do Test E. 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
8
1995 RANGE ROVER

 



	 	

	 	
 


#  %#
	
 
	

 


#  %#
	
 
	&

 



 
$
 ! &
#! 
 ! &K108
Compressor Clutch
Relay
K108
Compressor Clutch Relay






	




	











#  
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls
9
1995 RANGE ROVER

 
 	 	

$!)!%$ +!) 
	 









	

$!)!%$ +!) 
	 


 	 


! -

$ & +!) 
	 
-
	%#&((% 	*) , 	%#&((% 	*)  

 ! -
Compressor
Clutch -
$!$
 


%$) 	 +!) 
K108
Compressor
Clutch Relay








	





	


K108
Compressor
Clutch Relay









 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
10
1995 RANGE ROVER
	 
	
 

 

	 



 #&$# &!


 

	 
	


 #&$# &!


 

 


 % (
 % (K170
A/C Logic Relay





	



Z132
Engine Control
Module (ECM)





 R400002

 
 	 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls
11
1995 RANGE ROVER

 
 	
 %!  %



	 









	
 %!  %



	 






Engine Control
Module (ECM) ( !#$$!# &% 

 # (

  
	 







	


K170
A/C Logic Relay

 

(
A/C Logic Relay




	

K170
A/C Logic Relay

  
	 











!#$$!# &%