Evaporative Emissions: Diagnosis Jaguar X-type I

Preliminary Inspection

1. Visually inspect for obvious signs of mechanical or electrical damage, blown fuses, etc.
2. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
3. If the concern is not visually evident, verify the symptom and proceed with diagnosis, using the Jaguar approved diagnostic system, where available.
4. Where K-Line equipment is available, it should be used as an aid to diagnosis.

Diagnostic Drive Cycles

Following the setting of a DTC, the appropriate repairs must be carried out, and the normal operation of the system checked. This will be done by performing a series of drive cycles which will enable the vehicle to operate the Evaporative Emissions system as a function check. The following drive cycles cover the use of the Jaguar approved diagnostic system, GDS510 instrument, and a test with no additional equipment, where possible.

40 thou test, using the Jaguar approved diagnostic system

1. Avoiding high engine loads, drive the vehicle steadily between 64 and 97 Kilometres per hour. (40 and 60 miles per hour). Using the Jaguar approved diagnostic system, monitor the Evaporative valve duty cycle (Purge vapor management valve-duty cycle), CCV status (Canister close valve-vapor recovery system), and the FTPS (Fuel tank pressure-vapor recovery system). The Jaguar approved diagnostic system will give an indication when the test is active. Dependant on the level of vapor concentration, it may take up to 30 minutes for the test to initialise. (Vapor concentration cannot be measured using the Jaguar approved diagnostic equipment). When the test has initialised (CCV closed), it will take up to 90 seconds to complete. Avoid excessive fuel movement while the test is active.

20 thou test, using the Jaguar approved diagnostic system

1. Continue driving the vehicle steadily between 64 and 97 Kilometres per hour. (40 and 60 miles per hour), avoiding high engine loads for a further 10 minutes.
2. Avoiding excessive fuel movement, gently bring the vehicle to rest. (Coast to a stop).
3. Allow the vehicle to idle for 2 minutes.
4. Use the Jaguar approved diagnostic system to monitor the Evaporative valve duty cycle (Purge vapor management valve-duty cycle), CCV status (Canister close valve-vapor recovery system), and the FTPS (Fuel tank pressure-vapor recovery system). The Jaguar approved diagnostic system will give an indication when the test is active. When the test has initialised (CCV closed), it will take up to 90 seconds to complete.

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, carry out the following

1. Drive the vehicle steadily for a further 30 minutes, avoiding excessive fuel movement.
2. Avoiding excessive fuel movement, gently bring the vehicle to rest. (Coast to a stop).
3. Allow the vehicle to idle for 2 minutes.
4. Use the Jaguar approved diagnostic system to monitor the Evaporative valve duty cycle (Purge vapor management valve-duty cycle), CCV status (Canister close valve-vapor recovery system), and the FTPS (Fuel tank pressure-vapor recovery system). The Jaguar approved diagnostic system will give an indication when the test is active. When the test has initialised (CCV closed), it will take up to 90 seconds to complete. If the 20 thou test fails to run a second time, repeat the entire test.
5. Check for DTCs. Rectify as indicated.

40 thou test, using GDS510

1. Avoiding high engine loads, drive the vehicle steadily between 64 and 97 Kilometres per hour. (40 and 60 miles per hour)
2. When the test has initialised, using the GDS510, monitor the Evaporative valve duty cycle, CCV status, and the FTPS. (The GDS510 will give an indication when the test is active).
3. When the test has initialised (CCV closed), it will take up to 90 seconds to complete.
4. To make sure that the test has completed, TID 08 in mode 6 must be checked. (If the test has not completed, this TID will display 0. Any other value indicates test completion).
5. If the test did not complete, repeat the test.

20 thou test, using GDS510

1. Continue driving the vehicle steadily between 64 and 97 Kilometres per hour. (40 and 60 miles per hour) avoiding high engine loads for a further 10 minutes.
2. Avoiding excessive fuel movement, gently bring the vehicle to rest. (Coast to a stop).
3. Allow the vehicle to idle for 2 minutes.
4. When the test has initialised, using the GDS510, monitor the Evaporative valve duty cycle, CCV status, and the FTPS. (The GDS510 will give an indication when the test is active).
5. When the test has initialised (CCV closed), it will take up to 90 seconds to complete.
6. 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).
7. If the test did not complete, repeat the test.
8. 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.
9. Check for DTCs. Rectify as indicated.

Diagnostic Trouble Code Charts

DIAGNOSTIC TROUBLE CODE CHARTS