Range Rover 2. Electrical Manual — part 165

CRUISE CONTROL

B5

18

TROUBLESHOOTING

OU

OK

OK

PROBLEM CAUSE

OK

OK

3D

4D

CONDITIONS

Ignition Switch

Position: II

Y, YR

CONDITIONS

Ignition Switch

Position: II

Wire

-

-

D

D

4D

D

Cruise Control Switch

On

Body Electrical Control
Module (BECM)

2D

PROBLEM CAUSE

OU, OR

-

- Cruise Control Vacuum

Pump

Turn a drive wheel by hand

D

RESULTS

=

C0239

YR

V

Z121
Cruise Control ECU

Y

LHD
RHD

5V with ignition position II

RESULTS

Cruise Control Vacuum Pump

Operates

D

C0239

Z121
Cruise Control ECU

OR

OR

Wire

5D

Transfer Gearbox

Hi Range

D

Gear Selector

Forward Gear

D

Brake Pedal

Released

D

=

2.5V approx. with wheels turning

10
1

18

9

10
1

18

9

CRUISE CONTROL

B5

19

TROUBLESHOOTING

BAT VOLT

OK

OK

PROBLEM CAUSE

OK

OK

5D

1E

CONDITIONS

Ignition Switch

Position: II

OK

CONDITIONS

Ignition Switch

Position: II

Wire

-

-

D

D

D

Cruise Control Switch

On

Cruise Control Vacuum
Pump

Test E

4D

PROBLEM CAUSE

Cruise Control ECU

-

GO TO TEST F

C0239

Z121
Cruise Control
ECU

Gear Selector

Forward Gear

D

D

Clutch Pedal

Released

Cruise Control Switch

On

D

RESULTS

Cruise Control Vacuum Pump

Operates

D

Throttle Opens Wide

Valve Closes

OK

OR

Z249
Cruise Control
Converter/Inverter
Module

V

C0895

B

OW

RESULTS

2E

Transfer Gearbox

Hi Range

D

Gear Selector

Forward Gear

D

Brake Pedal

Released

D

OU

OR

10
1

18

9

CRUISE CONTROL

B5

20

TROUBLESHOOTING

OK

OK

PROBLEM CAUSE

OK

OK

2E

3E

CONDITIONS

Ignition Switch

Position: 0

B

CONDITIONS

Ignition Switch

Position: 0

Wire

-

D

D

3E

D

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

D

RESULTS

Less than 1 ohm

D

Z249
Cruise Control
Converter/Inverter
Module

C0895

B

Z238
Body Electrical
Control Module
(BECM)

C1279

WY

CRUISE CONTROL

B5

21

TROUBLESHOOTING

Test F

OK

OK

PROBLEM CAUSE

OK

OK

3F

1F

2F

CONDITIONS

Ignition Switch

Position: II

BAT VOLT

GB

Wire

-

-

D

2F

Stop Lamp Switch

PROBLEM CAUSE

YP

Wire

-
- Stop Lamp Switch

RESULTS

Brake Pedal

D

Depressed
Released

=

=

0 V

CONDITIONS

Ignition Switch

Position: II

BAT VOLT

D

RESULTS

Brake Pedal

D

Depressed
Released

=

=

0 V

Z132
Engine Control
Module (ECM)

V

GP

Z132
Engine Control
Module (ECM)

V

YP

C0411

C0411