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

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E6
Radio (except NAS)
23
DISCOVERY
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							ELECTRICAL TROUBLESHOOTING MANUA L
E6 ETM
Radio (except NAS)
24
DISCOVERY
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							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E6
Radio (except NAS)
25
DISCOVERY
& & 


  
 





	 

  
 

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X235
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							ELECTRICAL TROUBLESHOOTING MANUA L
E6 ETM
Radio (except NAS)
26
DISCOVERY
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							RADIO (NAS)
1
ETM E7
DISCOVERY
ELECTRICAL TROUBLESHOOTING MANUAL
CIRCUIT OPERATION
The new audio system consists of a new head unit
connected to a Radio Tune switch, a Waveband
Switch, a Volume up and a Volume down switch
which are located on the fascia next to the
Instrument Cluster. The system is also equipped
with an amplifier, a subwoofer, a subwoofer
amplifier and a CD changer which is connected to
the Radio with a DIN cable. The amplifier is
connected to power via a Power Amplifier Relay
which is energized with Ignition on.
The control head is equipped with an anti±theft
feature which makes the unit innoperative once
battery power is removed. A security code must be
entered to restore power to the unit. The system is
equipped with two rear and two front speakers.
Battery voltage is provided to the control head at all
times through the P wire. In addition to monitoring
the anti±theft feature, this input keeps the present
station memory alive. Whenever battery power to
the unit is lost, the anti±theft code must be entered
and the present stations must be reprogrammed.
When the Radio (Z111) and the ignition are turned
on, the voltage signal through the LGO wire and
the control head wakes up
 the unit. The Radio
(Z111) plays, the VF display comes on and the
control unit buttons illuminate. The VF display is
dimmed when the headlights or park lights are
turned on. When the lights are on, voltage from
fuse F8 of the Fascia Fusebox (P126) is applied to
the Radio (Z111) terminal 6, Connector 230
signalling the Radio (Z111) to dim the display. 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
E7 ETM
Radio (NAS)
2
DISCOVERY
S2061
4 C230
E201
30
F 6
20A
0.5 PP128
Satellite Fuse
Box 2
6 0.5 RN7
R
F 3
10A
1.5 LGOP126
Fascia Fuse Box
C229 1
1.5See Fuse Details
Interior Lamps
C209 13 1.0 LGO
8
C2055 10
1.5 B
C2029 6
See Ground Dis-
tribution
5
C2055 12 0.5 UYC230
0.5 PY Not used
Z111
Radio
C2079
Z233
Antenna
S272
A
E7-6E7-8
B
5C268
0.5 B
1.0 B
S2065 13C2055
1.5
B1.5 B
C212
9 LGO 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E7
Radio (NAS)
3
DISCOVERY
0 [1]C268
0.5 UG3
1
5
0.5 B 0.5 B
2
C2056 4C2056 0.5 RN
X233
Radio Tune
Switch
0.5 RG4
1
5
0.5 B 0.5 B
2
C2057 4C2057 0.5 RN
X234
Radio Waveband
Switch
S217
E201
See Ground Dis-
tribution Interior Lamps Interior LampsZ111
Radio
0 [1] 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
E7 ETM
Radio (NAS)
4
DISCOVERY
0 [1]C268
0.5 NY1
1
5
0.5 B 0.5 B
2
C2058 4C2058 0.5 RN
X235
Radio Volume Up
Switch
0.5 U2
1
5
0.5 B 0.5 B
2
C2059 4C2059 0.5 RN
X236
Radio Volume
Down Switch
S277
E201
See Ground Dis-
tribution Interior Lamps Interior LampsZ111
Radio
0 [1] 
						

							ELECTRICAL TROUBLESHOOTING MANUAL
ETM E7
Radio (NAS)
5
DISCOVERY
30
F 12
10 A
 
C204 4
See Fuse Details
S2021
HJ6
0.7 P
C381 3
Z114
CD Changer
See Ground Dis-
tribution C322
DIN CABLE
C20801 C381
0.7 B
1.5
B E205
Z111
Radio
2 4 6 8 1 3 5 7 C260
0.5 B0.5 B0.5 B 0.5 B
S2064
0.5 B
2
3 1 5 7 C2055
0.5 B
11 1 2 3 4 C20540.5 R
0.5 G0.5 Y
0.5 U
Z226
Radio Amplifier
Shield
Z175
Radio Amplifier
 
P126
Fascia Fuse Box 
						

							ELECTRICAL TROUBLESHOOTING MANUA L
E7 ETM
Radio (NAS)
6
DISCOVERY
E7-2
S2033
30
F 4
15 AR
F 3
10 A
S279
S2031
HJ5
A
0.5 PY
C2054 14 9
1.5 LGP87 86 C2053
E200
See Ground Dis-
tribution
Z175
Radio Amplifier K187
Power Amplifier
Relay
0.5 B 87 30 85
86 30 85 C2053 1.5 NK
0.5 LGO
See Fuse Details1 C229
P126
Fascia Fuse Box P128
Satellite Fuse
Box 2
See Fuse Details