Work step: 11 Diagnostic test: Fuel tank vent system (EVAP canister purge regulator valve)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1999 Volkswagen Jetta, 1999 Volkswagen GTI, 1998 Volkswagen Jetta, 1998 Volkswagen GTI, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
- Vehicle stationary
- All electrical consumers switched OFF (coolant fan not running during check)
- A/C switched OFF
NOTE:
Engine must not be under load during the diagnostic test or sequence will be interrupted and not started again until engine is revved up.
Display will appear as shown
- Press -1-, -5- and -0- buttons to input display group 150.
- Press -Q- button to enter input.
Display will appear as shown (1 to 4 = display fields)
- Run engine for 30 seconds at idle and check specifications.
NOTE:
For work step 11, look for either display field 2 or display field 3 specification fulfillment, but not both. Fulfillment of either display is acceptable.
DISPLAY GROUP: 150, FUNCTION: 04
| Display fields | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group: 150, Function: 04 | ||||
| Display | xx % | x.x % | x.xx g/s | xxxx xxxx |
| Indicated | Opening degrees | Oxygen Sensor (O2S) control | Idling control | Diagnostic conditions |
| Specification | 0 to 100 % | -7.8 to -23 or 7.8 to 23 or at least 0.20 g/s | 1110 x100 | |
| Min. opening of EVAP can. valve | O2S control deviations during diagnosis | O2S control deviations during diagnosis | x = Not relevant | |
| Working range | 0 to 100 % | -25 to 25 | ||
RELEVANCE OF 8 DIGIT NUMBER BLOCK IN DISPLAY FIELD 4
| Relevance of 8 digit number block in display field 4 | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Specifications of diagnostic conditions |
| 1 | O2S control before three way catalytic converter active | |||||||
| 1 | Idling | |||||||
| 1 | Starting temperature warmer than -5 °C | |||||||
| 0 | Altitude up to max. 2600 m above sea level | |||||||
| 1 | CYCLE Bit = Diagnosis completed | |||||||
| 0 | Diagnosis malfunction free | |||||||
| 0 | DTC memory malfunction free | |||||||
- Press --> button.