Range Rover 2. Electrical Manual — part 37
RADIO
E6
TROUBLESHOOTING HINTS
16
TROUBLESHOOTING HINTS
3. Check fuses F1, F8, F9, F14 and F15 of BeCM
(Z238).
4. Check that Radio (Z111) connectors and coaxial
cable are tight and properly connected.
5. For proper Radio (Z111) noise diagnosis, take
the vehicle outside where signals are strong.
Close the hood and keep away from metal buil-
dings or other sources of Radio interference.
6. If Radio (Z111) noise is excessive when an ac-
cessory is on, install a radio noise suppression
capacitor to the power lead of the accessory.
7. If Radio (Z111) noise is excessive at all times,
check antenna wiring, side screen antennas and
antenna amplifiers. If OK, check speaker plugs,
spark plug wiring and wiring close to the ignition
system which could transmit noise to the Radio
(Z111) wiring.
8. If only the CD Changer (Z114) does not operate,
check DIN cable. If OK, check Radio and CD
Changer (Z114).
9. If the Radio (Z111) is inoperative and displays
either CODE (low line) or CODE IN (all others),
follow the instructions below.
Security Code Instructions
Low Line (PRC7613)
Obtain the 4 digit security code from the customer’s
security card or, if they have lost it, from the
manufacturer.
1. Press the preset 1 button once.
2. Using the arrow up and arrrow down buttons,
change the – to show the first digit of the code.
3. Press the preset 1 once.
4. Repeat steps 2 and 3 for digits 2, 3 and 4.
5. When the preset 1 button is pressed after the
fourth digit, operation should be restored.
If the wrong code is entered, the word WAIT will
appear. Do not switch off. Wait until CODE appears,
then try again. The time delay will increase each
time an incorrect code is entered.
All others (PRC7617, PRC7618, AMR2672)
Obtain the four digit security code from the
customer’s security card or from the manufacturer.
Enter the code using the preset buttons (1 to 6).
When the final digit is entered, the radio should
return to full operation.
If the wrong code has been entered, the display will
show the number just entered, instead of the
frequency. This must be cleared by pressing and
holding the BAND button for 5 seconds. The display
will then revert to CODE IN, and the code should be
entered.
If the wrong code is entered more than THREE
times in succession, the code can no longer be
entered. Units PRC7617 and PRC7618 will show
–––. When this clears, input the correct code. Unit
AMR2672 will allow the code to be entered, but will
not respond even if the code is correct. If this
happens, leave the set switched on for at least one
hour without touching any controls. After waiting this
time period, try again.
RADIO
E6
TROUBLESHOOTING HINTS
17
SYSTEM DIAGNOSIS
1. If Radio (Z111) does not operate at all, do Test A.
2. If Radio scans past all frequencies when in seek
mode and hiss is present over most stations, do
Test B.
3. If VF display does not dim when headlamps or
park lamps are turned on, do Test C.
4. If one or more speakers do not operate, do
Test D.
5. If the Subwoofer (K146) does not operate, do
Test E.
6. If all right rear door speakers do not operate, do
Test F.
7. If all left rear door speakers do not operate, do
Test G.
8. If all left front door speakers do not operate, do
Test H.
9. If all right front door speakers do not operate, do
Test I.
10. If none of the steering wheel switches to the ra-
dio operate, do Test J.
RADIO
E6
18
TROUBLESHOOTING
Z111
Radio
Z111
Radio
BAT VOLT
Test A
OK
OK
PROBLEM CAUSE
OK
OK
1A
2A
CONDITIONS
Ignition Switch
Position: I
RESULTS
BAT VOLT
P
CONDITIONS
Ignition Switch
Position: I
RESULTS
Wire
-
-
D
D
2A
WK Wire
Fuse F1
-
PROBLEM CAUSE
B Wire
-
PROBLEM CAUSE
Radio
-
V
Body Electrical Con-
trol Module (BECM)
-
P
WK
C226
V
B
WK
C226
RADIO
E6
19
TROUBLESHOOTING
Z111
Radio
Antenna Am-
plifier(s)
BAT VOLT
Test B
OK
OK
PROBLEM CAUSE
OK
OK
1B
1C
CONDITIONS
Ignition Switch
Position: I
RESULTS
BAT VOLT
WO
CONDITIONS
Ignition Switch
Position: II
RESULTS
Wire
-
-
D
D
Body Electrical Con-
trol Module (BECM)
Fuse F8
-
Test C
PROBLEM CAUSE
Coaxial Cable
-
- Radio
Antenna Amplifier(s)
-
PROBLEM CAUSE
RW Wire
-
- Body Electrical Con-
trol Module (BECM)
PROBLEM CAUSE
Radio
-
Headlamps
On
D
WO
C318
C364
RW
C226
1
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