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Land Rover Range Rover Etm 1995 4th Edition Rover Manual

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    							CRUISE CONTROL (PETROL)B5
6CIRCUIT DIAGRAM
C626
Z256
Transfer Gear
Box ECU
C603
35
3NY
S603
Z108
Anti±Lock
Brake System
ECU
C116R
28
11 C114YG
Z238
Body Electrical
Control Module
(BECM)
C258
19
ONC227
1
1
X168
Stop Lamp
Switch
[1] Brake
Pedal De-
pressed
C227 2
YP [1] [1]
3
00
GP S211
15
F 17
Automatic Gear-
box
10A
See Fuse Details
Anti±Lock Brake
System
S201
C2584
Z121
Cruise Control
ECU C243
5
See Ground Dis-
tribution
8
B
S207
E252
Z238
Body Electrical
Control Module
(BECM)
C243
20
Y
11
X112
Brake Switch Vent
Valve
[1] Brake Pedal
Depressed
[1]
20
9
C228
OR
C255
YRLHD
RHD
LHD
C116L RHD
C228W Petrol
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    							CRUISE CONTROL (PETROL)B5
7CIRCUIT DIAGRAM
Z121
Cruise Control
ECU
C243
61
OU
Z238
Body Electrical
Control Module
(BECM)
4
YG
2
See Ground Dis-
tribution
1
B
S215
E252 C230
8
X200
Clutch Pedal Position
Switch
[1] Clutch Pedal De-
pressed
[1] 0
UBAutomatic
Transmission
C230
7
OR OK
8 C204910
C15713
M103
Cruise Control
Vacuum Pump2
Manual
Transmission
M
P01 1
R00 1
N10 1
D10 0
3000
2010
1110
Z* 1 1 1
XY Z
1
X294
Gear Box Posi-
tion Switch
[1] X Switch
[2] Y Switch
[3] Z Switch
[1]
0
9
UP
2
See Ground Dis-
tribution
6
BG
E621 C562
[2]
0
7C660
610
18 C626
UG
3
[3]
0
C562
C659
C559
5C560
S608
S609
S610
Automatic Gear-
box
C104
C560
C660C255
XYZ Petrol
1 =
0 =
* =Switch Open
Switch Closed
Fault
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    							CRUISE CONTROL (PETROL)B5
8CIRCUIT DIAGRAM
2
C506B
9C112
S
C106B
2
C506A C106A
23 C505
NAS Except NASZ238
Body Electrical
Control Module
(BECM)
Z132
Engine Control
Module (ECM) Petrol
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    							CRUISE CONTROL (DIESEL)B5
9CIRCUIT DIAGRAM
See Ground Dis-
tribution S207
E252
B
Z238
Body Electrical
Control Module
(BECM)
C211 C255
X115
Cruise Control
Switch
62
18 14
5
See Ground Dis-
tribution
4 C211
B
S208
E252
31
BB
Z249
Cruise Control
Converter/In-
verter Module
C241D65
YR
8C241D4
2 C2351
Z119
Rotary Coupler
YS
C24723
X269
Steering Wheel
Switches
[6] Reset/
Decel
[7] Set/Accel
C2476
PB
Z119
Rotary Coupler
See Ground Dis-
tribution S215
E252
WR
5 C235
RW WY OW
WRInterior Lamps
[6] [7]S20200
Z132
Engine Control
Module (ECM)
C572
20
YO
19C571
2C102
OY
OYC202 C121
B
1 0
Diesel
2
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    							CRUISE CONTROL (DIESEL)B5
10CIRCUIT DIAGRAM
Z108
Anti±Lock Brake
System ECU
C116R
28
11 C114YG
Z238
Body Electrical
Control Module
(BECM)
C258
139
Y
C227
29
1
X168
Stop Lamp
Switch
[1] Brake Pedal
Depressed
C227 2
YP[1] [1]
3
00
GP S211
15
F 17
10 A
See Fuse Details
Anti±Lock Brake
System
S203
Z132
Engine Control
Module (ECM)
See Ground Dis-
tribution B
S207
E252
9
S
50
C112
LHD
C116L RHD
C572 W
14C57120
26
3
680 
31
2
S106
14C202
C121 C102
9C202
C102
S201
K152
Resistor
S104Diesel Diesel
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    							CRUISE CONTROL (DIESEL)B5
11CIRCUIT DIAGRAM
Z132
Engine Control
Module (ECM)
Z238
Body Electrical
Control Module
(BECM)
4
YG
2
See Ground Dis-
tribution
1
B
S215
E252 C230
8
X200
Clutch Pedal Position
Switch
[1] Clutch Pedal De-
pressed
[1] 0
UBAutomatic
Transmission
C230
4
U
C57212
Manual Trans-
mission
P01 1
R00 1
N10 1
D10 0
3000
2010
1110
Z* 1 1 1
XY Z
1
X294
Gear Box Posi-
tion Switch
[1] X Switch
[2] Y Switch
[3] Z Switch
[1]
0
9
UP
2
See Ground Dis-
tribution
6
BG
E621 C562
[2]
0
7
C660 610
18 C626
UG
3
[3]
0
C562
C659
C559
5C560
S608
S609
S610
Automatic Gear-
box
C560
C660C255
XYZ
C586
K196
Fuel Pump As-
sembly
[1] Fuel Quan-
tity Sole-
noid
7 C586
[1]
RW
Diesel
S576
Refer to the Diesel
Section (A6) for
Complete Diesel
Engine Fuel Con-
trol
Diesel
1 =
0 =
* =Switch Open
Switch Closed
Fault *
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    							CRUISE CONTROLB5
TROUBLESHOOTING HINTS12
TROUBLESHOOTING HINTS
8. If the interior lights operate but the cruise control
switch light does not illuminate, check the bulb, B
wire and RW wire. If the cruise control system
operates but the cruise control switch light does
not illuminate, check bulb and OW wire.
9. Inspect vacuum hoses for kinks and restrictions.
10. Inspect actuator linkage for restrictions and ad-
justment.
11. Check the following two input signals to the
BeCM (Z238): Signal from Clutch Pedal Position
Switch (X200) for vehicles equipped with a ma-
nual transmission, or the X, Y, and Z switch sig-
nals from the Gearbox Position Switch (X294) for
vehicles equipped with an automatic transmis-
sion.
12. For vehicles equipped with a Petrol Engine,
check the following input signal to the BeCM
(Z238): Transfer box in Hi range signal from
Transfer Gear Box ECU (Z256).
13. For vehicles equipped with a Diesel engine,
check the Stop Lamp Switch (X168) inputs to the
Engine Control Module (ECM) (Z132).
14. Note: For vehicles equipped with a manual trans-
mission, cruise control can only be activated
when the Cruise Control Switch (X115) is de-
pressed, the transfer gear box is in Hi range (Pe-
trol only), and the clutch pedal is not depressed.
Also, the BeCM (Z238) will deactivate cruise
control if the engine rpm rises above 5000 +/± 10
percent, due to the possibility of selecting ma-
nual without the use of the clutch (Petrol only).
For vehicles equipped with an automatic trans-
mission, cruise control can only be activated
when the Cruise Control Switch (X115) is de-
pressed, the transfer gear box is in Hi range (Pe-
trol only), and the transmission is in one of the
forward gears. The Transfer Gear Box ECU
(Z256) provides the BeCM (Z238) with transfer
gear box Hi range status. The Transfer Gear Box
Position Switch (X294) provides the BeCM
(Z238) with X, Y, Z switch status (PRND321 po-
sition information).
SYSTEM DIAGNOSIS
1. If the cruise control system does not operate cor-
rectly and the vehicle is equipped with a Petrol
Engine, do Test A.2. If the cruise control system does not operate cor-
rectly and the vehicle is equipped with a Diesel
Engine, do Test E.
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    							CRUISE CONTROLB5
13TROUBLESHOOTING
Test A
OKOK
OKOK
3A 1A
2A
CONDITIONS
Ignition Switch
Position: II
CONDITIONS
Ignition Switch
Position: 0
 
Less than 1 ohm
2A
GO TO TEST B
PROBLEM CAUSE
B Wire -Z121
Cruise Control
ECU
C243
Z121
Cruise Control ECU
C243
B
Cruise Control Switch
On

OW
RESULTS
VB
Within 1.5V of battery voltage
RESULTS
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    							CRUISE CONTROLB5
14TROUBLESHOOTING
OKOKPROBLEM CAUSE
OKOK
2B 3A
1B
CONDITIONS
Ignition Switch
Position: 0
WY
CONDITIONS
Ignition Switch
Position: II
Wire -
-
 

Cruise Control Switch
On
B Wire
-
Test B
2A
PROBLEM CAUSE
OW Wire -
-
Body Electrical Control Mod-
ule (BECM)
PROBLEM CAUSE
OW Wire - Cruise Control Switch
On

RESULTS
Less than 1 ohm
Z238
Body Electrical
Control Module
(BECM)

C255
WY
Z249
Cruise Control Con-
verter/Inverter Module
C241PV
OW

Transfer Box
Hi Range

Gear Selector
Forward Gear

Clutch Pedal
Released
BAT VOLT
Cruise Control Switch
RESULTS
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    							CRUISE CONTROLB5
15TROUBLESHOOTING
OKOK
OKOK
2B
3B
CONDITIONS
Ignition Switch
Position: II
BAT VOLT
CONDITIONS
Ignition Switch
Position: 0
 
1B
3B
GO TO TEST C
PROBLEM CAUSE
YR, W Wire -
-
B, PB Wire
Steering Wheel Switches -PROBLEM CAUSE
Cruise Control Converter/In-
verter Module -
C243 RY
On
OffZ249
Cruise Control Con-
verter/Inverter Mod-
ule
C241P

YR
Less than 1 ohm
More than 10K ohms=
=
Cruise Control Switch
On

RESULTS
Steering Wheel Switches
RES/DECEL Switch

On
Off=
=
0V
RESULTS
Steering Wheel Switches
RES/DECEL Switch

Rotary Coupler -
V
Z121
Cruise Control ECU
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