Range Rover. Manual - part 69

EMISSION CONTROL

FAULT DIAGNOSIS

TESTING EVAPORATIVE EMISSION CONTROL -
PRE ADVANCED EVAPS

The following pressure test procedure is intended to
provide a method for ensuring that the system does
not leak excessively and will effectively control
evaporative emissions.

Equipment required.

Nitrogen cylinder (compressed air may be used to
pressure the system when there has NEVER been
fuel present in the fuel or evaporative control
systems).

Water manometer 0 - 100 cm (0 - 30" H2O or more).

Pipework and a "T" piece.

Method.

1. Ensure that there is at least two gallons of fuel in

the petrol tank unless there has never been any
fuel in the system.

2. Disconnect, at the EVAP canister, the pipe to the

fuel tank vapour separator.

3. Connect this pipe to the nitrogen cylinder and

the water manometer using the "T" piece.

4. Pressurize the system to between 67.3 and 70.0

cm (26.5 and 27.5 inches) of water, allow the
reading to stabilize, then turn off the nitrogen
supply.

5. Measure the pressure drop within a period of 2

minutes 30 seconds. If the drop is greater than
6.3 cm (2.5 inches) of water the system has
failed the test. Note that a fully sealed system
will show a slight increase in pressure.

6. Should the system fail the test, maintain the

pressure in the system and apply a soap
solution round all the joints and connections until
bubbles appear to reveal the source of the leak.

7. Repeat the test and if successful, dismantle the

test equipment and reconnect the pipe to the
EVAP canister.

LEAK DETECTION PROCEDURE - ADVANCED
EVAPS

1. Connect TestBook to the vehicle and confirm

that the fault code(s) displayed relate to an
EVAP system fault.

2. Examine components in fuel and EVAP system

for damage or poorly connected joints.

3. Repair or replace components to rectify any

faults found, then reset the Malfunction Indicator
Lamp (MIL) using TestBook.

4. Carry out Drive Cycle,

See this section.

5. Using TestBook confirm that the Evaporative

Loss Control (ELC) Inspection and Maintenance
(IM) flag has cleared. This procedure should
confirm that the ELC test was carried out during
the drive cycle and that the fault was cured.

6. If the IM flag is still shown, use TestBook to

interrogate the engine management system to
ascertain which of the following situations exists:

•

If a fault code is shown, then further investigation
is required, proceed to the next step.

•

If the IM flag is still shown, but no faults are
indicated the conditions for the ELC check have
not been met and the drive cycle must be
repeated.

7. Connect the EVAP Diagnostic Station to the

service port and carry out the procedures given
in the operating instructions supplied with the
equipment.

8. Rectify faults indicated by the EVAP Diagnostic

Station and return to step 4.

EMISSION CONTROL

NEW RANGE ROVER

FAULT DIAGNOSIS

DRIVE CYCLES - up to 99MY

1. Switch on ignition for 30 seconds.
2. Ensure that coolant temperature is less than

C (86

F).

3. Start engine and allow to idle for 2 minutes.
4. Perform 2 light accelerations 0 to 35 mph (0 to

56 km/h) with light pedal pressure.

5. Perform 2 medium accelerations 0 to 45 mph (0

to 72 km/h) with moderate pedal pressure.

6. Perform 2 hard accelerations 0 to 55 mph (0 to

88 km/h) with heavy pedal pressure.

7. Cruise at 60 mph (96 km/h) for 5 minutes.
8. Cruise at 50 mph (80 km/h) for 5 minutes.
9. Cruise at 35 mph (56 km/h) for 5 minutes.

10. Allow engine to idle for 2 minutes.
11. Connect TestBook and check for fault codes.

DRIVE CYCLES - from 99MY

The following are the Testbook drive cycles

Drive cycle A:

1. Switch on the ignition for 30 seconds.
2. Ensure engine coolant temperature is less than

C (140

F).

3. Start the engine and allow to idle for 2 minutes.
4. Connect Testbook and check for fault codes.

Drive cycle B:

1. Switch ignition on for 30 seconds.
2. Ensure engine coolant temperature is less than

C (140

F).

3. Start the engine and allow to idle for 2 minutes.
4. Perform two light accelerations (0 to 35 mph) (0

to 60 km/h) with light pedal pressure).

5. Perform two medium accelerations (0 to 45 mph)

(0 to 70 km/h) with moderate pedal pressure).

6. Perform two hard accelerations (0 to 55 mph) (0

to 90 km/h) with heavy pedal pressure).

7. Allow engine to idle for two minutes.
8. Connect Testbook and check for fault codes.

Drive cycle C1 (vehicles without advanced
EVAPS):

1. Switch ignition on for 30 seconds.
2. Ensure engine coolant temperature is less than

C (140

F).

3. Start the engine and allow to idle for 2 minutes.
4. Perform two light accelerations (0 to 35 mph) (0

to 60 km/h) with light pedal pressure).

5. Perform two medium accelerations (0 to 45 mph)

(0 to 70 km/h) with moderate pedal pressure).

6. Perform two hard accelerations (0 to 55 mph) (0

to 90 km/h) with heavy pedal pressure).

7. Cruise at 60 mph (100 km/h) for 5 minutes.
8. Cruise at 50 mph (80 km/h) for 5 minutes.
9. Allow engine to idle for 2 minutes.

10. Connect Testbook and check for fault codes.

EMISSION CONTROL

FAULT DIAGNOSIS

Drive cycle C2 (vehicles with advanced EVAPS):

1. Switch ignition on for 30 seconds.
2. Ensure engine coolant temperature is less than

C (140

F).

3. Start the engine and allow to idle for 2 minutes.
4. Perform two light accelerations (0 to 35 mph) (0

to 60 km/h) with light pedal pressure).

5. Perform two medium accelerations (0 to 45 mph)

(0 to 70 km/h) with moderate pedal pressure).

6. Perform two hard accelerations (0 to 55 mph) (0

to 90 km/h) with heavy pedal pressure).

7. Cruise at 60 mph (100 km/h) for 8 minutes.
8. Cruise at 50 mph (80 km/h) for 3 minutes.
9. Allow engine to idle for 3 minutes.

10. Connect Testbook and check for fault codes.

NOTE: The following areas have an
associated readiness test which must be
flagged as complete, before a problem

resolution can be verified:

•

Catalytic converter fault;

•

Evaporative loss system fault;

•

S sensor fault;

•

S sensor heater fault.

When carrying out a drive cycle C to determine a
fault in the above areas, select the readiness
test icon to verify that the test has been flagged
as complete.

Drive cycle D:

1. Switch ignition on for 30 seconds.
2. Ensure engine coolant temperature is less than

C (95

F).

3. Start the engine and allow to idle for 2 minutes.
4. Perform two light accelerations (0 to 35 mph) (0

to 60 km/h) with light pedal pressure).

5. Perform two medium accelerations (0 to 45 mph)

(0 to 70 km/h) with moderate pedal pressure).

6. Perform two hard accelerations (0 to 55 mph) (0

to 90 km/h) with heavy pedal pressure).

7. Cruise at 60 mph (100 km/h) for 5 minutes.
8. Cruise at 50 mph (80 km/h) for 5 minutes.
9. Cruise at 35 mph (60 km/h) for 5 minutes.

10. Allow engine to idle for 2 minutes.
11. Connect Testbook and check for fault codes.

Drive cycle E:

1. Ensure the fuel tank is more than a quarter full.
2. Carry out drive cycle A.
3. Switch off ignition.
4. Leave vehicle undisturbed for 20 minutes.
5. Switch on ignition.
6. Connect Testbook and check for fault codes.

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