Jaguar XJ (X350). Manual — part 826

When the test has initialized, using the scan tool, monitor the evaporative valve duty cycle, CCV

status, and the FTPS (the scan tool should give an indication when the test is active).

When the test has initialized (CCV closed), it will take up to 90 seconds to complete.

To make sure that the test has completed, TID 06 in mode 6 must be checked (if the test has not

completed, this TID will display 0. Any other value indicates test completion).

If the test did not complete, repeat the test.

If the 20 thou test has not run, it is likely that the vapor concentration in the purge system is too

great. In this case, drive the vehicle steadily for a further 30 minutes, avoiding excessive fuel
movement, then repeat the test.

Check for DTCs. Rectify as indicated.

40 thou and 20 thou tests using no additional equipment

The test procedure and conditions are as for the Jaguar approved diagnostic system or scan tool, but

no confirmation of the test having run is possible without the use of one of these instruments. The

DTC will be set if the fault still exists, but the possibility exists that the conditions for the test to run

may not have been met, in which case, the DTC may not be set until the owner reproduces the

conditions in which the fault originally occurred.

Drive cycle for "green" ECM

To enable the ECM to re-learn fuelling adaptations.

NOTE:

This procedure should be performed whenever the vehicle battery has been disconnected.

Due to component tolerance and wear during the normal running of a vehicle, fuelling and air

requirements for an engine will vary over time. The ECM has the ability to adjust for this variation by

"learning" the level of compensation that is required (these compensation values are referred to as

adaptations).

If the vehicle battery is disconnected, all adaptations held within the ECM will be lost (ie, set to zero).

The ECM is then referred to as "green". To enable the vehicle to function correctly, the ECM must

"relearn" these adaptations.

There are five areas or sites that need to be relearnt:

Allow the vehicle to idle until fully warm (temperature gauge just below mid-point).

Allow to idle for a further three minutes, minimum.

Drive the vehicle with the air conditioning OFF on a level road using a constant throttle, or speed

control if fitted, for at least one minute in the following gears, at the stated engine speeds for
each of the sites below.

"Green" ECM drive cycle chart. Site 1

NOTE:

The vehicle speed is for guidance only. DO NOT use the vehicle speed as the target to set

adaptions.

Monitor condition

Parameters

GEAR

P

ENGINE SPEED

Idle

VEHICLE SPEED (GUIDE ONLY) 0 mph

"Green" ECM drive cycle chart. Site 2

NOTE:

The vehicle speed is for guidance only. DO NOT use the vehicle speed as the target to set

adaptions.

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

1595 rpm

VEHICLE SPEED (GUIDE ONLY) 15.4 kph (9.56 mph)

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

1295 rpm

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VEHICLE SPEED (GUIDE ONLY) 11.0 kph (6.8 mph)

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

1158 rpm

VEHICLE SPEED (GUIDE ONLY) 14.4 kph (8.7 mph)

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

984 rpm

VEHICLE SPEED (GUIDE ONLY) 6.4 kph (4.0 mph)

"Green" ECM drive cycle chart. Site 3

NOTE:

The vehicle speed is for guidance only. DO NOT use the vehicle speed as the target to set

adaptions.

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

2385 rpm

VEHICLE SPEED (GUIDE ONLY) 37.5 kph (23.3 mph)

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

1877 rpm

VEHICLE SPEED (GUIDE ONLY) 30.4 kph (18.9 mph)

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

1831 rpm

VEHICLE SPEED (GUIDE ONLY) 32.0 kph (19.9 mph)

Monitor condition

Parameters

GEAR

2

ENGINE SPEED

1481 rpm

VEHICLE SPEED (GUIDE ONLY) 22.4 kph (14.0 mph)

"Green" ECM drive cycle chart. Site 4

NOTE:

The vehicle speed is for guidance only. DO NOT use the vehicle speed as the target to set

adaptions.

Monitor condition

Parameters

GEAR

3

ENGINE SPEED

2635 rpm

VEHICLE SPEED (GUIDE ONLY) 66.5 kph (41.3 mph)

Monitor condition

Parameters

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