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

							ELECTRICAL TROUBLESHOOTING MANUA L
K1 ETM
Blower Controls (with Rear A/C)
8
DISCOVERY
S431
E400
57
F 2
10 A
8 C204
0
0.5 B
G
K1-7
P126
Fascia Fuse Box
See Fuse Details
251 C392
X240
Passengers Rear
A/C Switch
S422
4 C392 0.5 RB
S421
1.25 UW
4
5
4 C467
0.5 LGWZ216
Rear A/C Switch
Amplifier
0
0.5 WB
152 C2024
X239
Main Rear A/C
Switch
S2444 C2024
See Ground Dis-
tribution
35
0.5 YL
8 C448
0.5 W
0.5 B
S426
E400
See Ground Dis-
tribution
Interior Lamps
0.5 LG 0.5 UW
1412C212
0.5 YU 0.5 YO
51C2073
0.5 W 1.25 UW
97C2067 1
F
K1-7
1.25 WG
C467
0.5 R
10 A
1 C462P140
Rear A/C Switch
Amplifier In±Line
Fuse
2 C462
3.0 YG
See Fuse Details
S425
E201
15
F 6
25 AP127
Satellite Fuse
Box 1
2
[1] [1] 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K1
Blower Controls (with Rear A/C)
9
DISCOVERY
E400Compressor
Controls
15
F 6
25 A
K193
Rear Blower
Motor Relay 86
J
K1-10
3.0 YG
3 C457
S428
0.5 PG
4
3.0 B
2
3.0 NR
See Ground Dis-
tribution S426
15 C457 P127
Satellite Fuse
Box 1
H
K1-7
S425
See Fuse Details
87
87a 8530
I
K1-7
1.25 WG
0.5
PG 
						

							3.0 G
ELECTRICAL TROUBLESHOOTING MANUA L
K1 ETM
Blower Controls (with Rear A/C)
10
DISCOVERY
S427
E400
M
3.0 NR
C458
C458 1
2M145
Rear Blower
Motor
C459 4
C459
3
2
C459 1
See Ground Dis-
tribution
C447
1.5
B
1 C391
0III
III
IV 0III
III
IV
X246
Passengers Rear
Fan Speed
Switch
C39152 3 43.0 GR
6 16 15 13 Z215
Rear Blower
Resistor Unit
3.0 BC448
1
J
K1-9
E
K1-7
3.0 G
3.0 B
S417 3.0 B S426
See Ground Dis-
tribution
2.0 N2.0 Y3.0 G0.5 BR 
						

							BLOWER CONTROLS
11
ETM K1
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUAL
TROUBLESHOOTING HINTS
4. Check Maxi-Fuse

 MF2 of the Engine
Compartment Fuse Box (P125).
5. Check Fuse F15 of the Fascia Fuse Box
(P126).
6. Check Fuse F6 of the Satellite Fuse Box 1
(P127).
7. If the Front Blower Motor (M101) does not stop
running with the Front Fan Speed Switch
(X247) in Position 0, replace the Front Fan
Speed Switch (X247).
8. If the Rear Blower Motor (M145) does not stop
running with the Passengers Rear Fan Speed
Switch (X246) in Position O, replace the
Passengers Rear Fan Speed Switch (X246).
9. If fresh air does not enter the vehicle cabin with
the Air Supply Selector Switch (X180) in the
Outside Air position, check the Air Recirculation
Solenoid (K123) and linkage for sticking or
binding.
10. If the blower motor(s) operate with the ignition
key removed, replace the Ignition Load Relay
(K127).
11. If the blower motor(s) run but not at the speed
indicated by the Fan Speed Switches), replace
the appropriate Fan Speed Switch.
SYSTEM DIAGNOSIS
1. If the Blower Motor(s) do not run at any speed,
do Test A.
2. If the Front Blower Motor (M101) does not run
at any speed, but the Rear Blower Motor
(M145) operates correctly, do Test B.
3. If the Rear Blower Motor (M145) does not run
at any speed, but the Front Blower Motor
(M101) operates correctly, do Test E.
4. If the Front Blower Motor (M101) runs in some
but not all Fan Speed Switch (X247) positions,
do Test C.
5. If the Rear Blower Motor (M145) runs in some
but not all Rear Fan Speed Switch (X246)
positions, do Test F.
6. If the Air Supply Selector Switch (X180) does
not allow the driver to change between
recirculation and fresh air modes, do Test D.7. With the engine running and the Fan Speed
Switch (X179) in position III, put the Air Supply
Selector Switch (X180) to Recirculation mode.
Place a piece of paper in front of the fresh air
intake vents on the vehicle hood.  If the paper
is drawn toward the vents, do Test D.
8. With the engine running and the Fan Speed
Switch (X179) in position III, put the Air Supply
Selector Switch (X180) to Fresh Air Mode.
Place a piece of paper in front of the
recirculation air intake vents.  If the paper is
drawn toward the intake, do Test D. 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
K1 ETM
Blower Controls
12
DISCOVERY

 

 	  	 	

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Ignition Load
Relay
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Ignition Load
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							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K1
Blower Controls
13
DISCOVERY

 

 	
 

	

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Ignition Load
Relay
 	

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Front Blower
Motor Relay










 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
K1 ETM
Blower Controls
14
DISCOVERY
 
  

 
 
 
 	
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Rear Blower
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Front Fan Speed
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							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K1
Blower Controls
15
DISCOVERY
 	


 

 

	
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Front Blower
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Front Blower
Motor Relay

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Front Blower
Motor Relay   
  
	



	


 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
K1 ETM
Blower Controls
16
DISCOVERY

	 	 
	 	 
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Front Blower
Motor  
 
Z214
Front Blower
Resistor Unit
Z214
Front Blower
Resistor Unit








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Front Blower
Resistor Unit 








  
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM K1
Blower Controls
17
DISCOVERY

 	  
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Switch












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Front Fan Speed
Switch
Z214
Front Blower
Resistor Unit