Land Rover Range Rover Etm 1995 4th Edition Rover Manual

CRUISE CONTROLB5
16TROUBLESHOOTING
On
Test C
OKOK
OKOK
1C
2C
2C
GO TO TEST D
PROBLEM CAUSE
YS,R Wire -
-
Rotary Coupler
Steering Wheel Switches -PROBLEM CAUSE
Cruise Control Converter/In-
verter Module -
Less than 1 ohm
Z249
Cruise Control Con-
verter/Inverter Module CONDITIONS
Ignition Switch
Position: 0
RESULTS

Steering Wheel Switches
SET/ACCEL Switch


Off More than 10K ohms

 
C241P
YS
= = CONDITIONS
Ignition Switch
Position: II
BAT VOLT


C243 SY
Cruise Control Switch
On


RESULTS
Steering Wheel...

CRUISE CONTROLB5
17TROUBLESHOOTING
Test D
OKOKPROBLEM CAUSE
OKOK
3D 1D
2D
GP Wire -
-
2D
W Wire
Stop Lamp Switch -
PROBLEM CAUSE
OR, ON Wire -
-
Brake Switch Vent Valve
Body Electrical Control
Module (BECM) -
Released
Z121
Cruise Control ECU CONDITIONS
Ignition Switch
Position: II
RESULTS

Brake Pedal
Depressed


BAT VOLT
0 V


C243
GP
=
=
CONDITIONS
Ignition Switch
Position: II
BAT VOLT


C243 OR
Cruise Control Switch
On


RESULTS
Brake Pedal


Depressed
Released=
=0 V
V
Z121
Cruise Control ECU Transfer...

CRUISE CONTROLB5
18TROUBLESHOOTING
OKOKPROBLEM CAUSE
OKOK
3D
4D
CONDITIONS
Ignition Switch
Position: II
Y,  Y R
CONDITIONS
Ignition Switch
Position: II
Wire -
-



4D


Cruise Control Switch
On
Body Electrical Control
Module (BECM)
2D
PROBLEM CAUSE
OU, OR -
-
Cruise Control Vacuum
Pump Turn a drive wheel by hand


RESULTS
=
C243 YR
V
Z121
Cruise Control ECU Y LHD
RHD5V with ignition position II
RESULTS
Cruise Control Vacuum Pump
Operates


C243
Z121
Cruise Control ECU
OR
OU
OR
Wire
5D
Transfer Gearbox
Hi...

CRUISE CONTROLB5
19TROUBLESHOOTING
BAT VOLT
OKOKPROBLEM CAUSE
OKOK
5D
1E
CONDITIONS
Ignition Switch
Position: II
OK
CONDITIONS
Ignition Switch
Position: II
Wire -
-

 



Cruise Control Switch
On
Cruise Control Vacuum
Pump
Test E
4D
PROBLEM CAUSE
Cruise Control ECU -
GO TO TEST F
C243
Z121
Cruise Control ECU
Gear Selector
Forward Gear




Clutch Pedal
Released
Cruise Control Switch
On


RESULTS
Cruise Control Vacuum Pump
Operates


Throttle Opens Wide Valve Closes
OK
OR
Z249
Cruise Control Con-...

CRUISE CONTROLB5
20TROUBLESHOOTING
OKOKPROBLEM CAUSE
OKOK
2E
3E
CONDITIONS
Ignition Switch
Position: 0
B
CONDITIONS
Ignition Switch
Position: 0
Wire -

 

3E


Cruise Control Switch
On
1E
PROBLEM CAUSE
WY Wire -
-
B Wire
Cruise Control Switch -PROBLEM CAUSE
OW Wire -
-
Body Electrical Control
Module (BECM) RESULTS
Less than 1 ohm


RESULTS
Less than 1 ohm 
Z249
Cruise Control Con-
verter/Inverter Module

 

C241D
B
Z238
Body Electrical
Control Module
(BECM)

 

C255
WY 

CRUISE CONTROLB5
21TROUBLESHOOTING
Test F
OKOKPROBLEM CAUSE
OKOK
3F 1F
2F
CONDITIONS
Ignition Switch
Position: II
BAT VOLT
GB Wire -
- 

2F
Stop Lamp Switch
PROBLEM CAUSE
YP Wire -
-
Stop Lamp Switch RESULTS
Brake Pedal


Depressed
Released
= =0 V
CONDITIONS
Ignition Switch
Position: II
BAT VOLT


RESULTS
Brake Pedal


Depressed
Released
= =
0 V
       	 
 
        	 


        	 
 
       
	 
 
        	 
 
     
Z132...

CRUISE CONTROLB5
22TROUBLESHOOTING
OKOKPROBLEM CAUSE
OKOK
5F 3F
4F
CONDITIONS
Ignition Switch
Position: II
Y,  Y G
CONDITIONS
Ignition Switch
Position: 0
RESULTSWire -
-

 

4F
Body Electrical Control
Module (BECM)
2F
PROBLEM CAUSE
OY, YO Wire - Turn a drive wheel by hand


RESULTS
       	 
 
        	 


        	 
 
       
	 
 
        	 
 
     
Z132
Engine Control Mod-
ule (ECM)

 V
Y
C572
Less than 1 ohm
   ...

CRUISE CONTROLB5
23TROUBLESHOOTING
OKOKPROBLEM CAUSE
OKOK
5F
6F
CONDITIONS
Ignition Switch
Position: 0
YR, W Wire -
- 

6F
B, PB Wire
Rotary Coupler -
4F
PROBLEM CAUSE
YS, R Wire -
-
Rotary Coupler
Steering Wheel Switches -PROBLEM CAUSE
Cruise Control Converter/
Inverter Module - RESULTS
Steering Wheel Switches


On
OffLess than 1 ohm
More than 10K ohms=
=
RES/DECEL SwitchZ249
Cruise Control Con-
verter/Inverter Mod-
ule


C241D
YR
Steering Wheel Switches -
CONDITIONS
Ignition Switch
Position: 0

...

TRANSFER GEARBOXB6
CIRCUIT OPERATION1
CIRCUIT OPERATION
Interface to transfer motor inside Transfer Box
(X313)
The Transmission Gearbox Control Unit (Z256) has
a seven wire interface to the Transfer Motor inside
the Transfer Box (X313), consisting of the four motor
position switches, the ground for the switches and
the drives to move the motor one way or the other.
Motor Position Switches±
pins 17, 32, 33, 7
The Transmission Gearbox Control Unit (Z256)
reads the position of the motor in the form of a...

TRANSFER GEARBOXB6
CIRCUIT OPERATION2
Neutral Switch (X308) or Clutch Switch±
pin 34
A shift between ranges is possible when the
transmission is in neutral. The Transmission
Gearbox Control Unit (Z256) senses this via a
Park/Neutral Switch (X308) on automatic
transmission vehicles and via either a clutch switch
or a lever neutral switch on manual transmission
vehicles. This signal is passed via the BeCM (Z238).
Interface to ªH± Gateº±
pin 35, 15 (automatic
transmission only)
The H±Gate gets the range...