Test sequence
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, 2003 Volkswagen Jetta, and 2003 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.
- Test drive vehicle.
Observe the valid safety precautions when road testing → Safety precautions .
During the road test the following operating conditions must be fulfilled:
- The coolant temperature must exceed 85 ° C.
- When the temperature is reached, the operating conditions
- Idling
- Part throttle
- Enrichment
- Wide open throttle
- Overrun
- must be attained several times.
- Then:
- Continue running engine at idling speed.
- Connect Scan Tool VAG 1551 or Vehicle system tester VAG1552/. Start engine and select "Address word" 01 of engine control module: → 01 ON BOARD DIAGNOSTIC (OBD)
Indicated on display:
| Rapid data transfer HELP Select function XX |
- Press keys "0" and "4" for function "Initiate basic setting" and confirm entry with "Q" key.
Indicated on display:
| Basic setting Input display group number XXX |
- Press keys "0" , "0" and "1" for "Display group number 1" and confirm entry with "Q" key.
Indicated on display: (1...4 = display zones)
| System in basic setting 1 -> 1 2 3 4 |
Only continue with the test when:
- Coolant temperature is above 85 ° C - Display zone 2 -
- Change to display group 77 as follows:
- Press "C" key.
Indicated on display
| Basic setting Input display group number XXX |
- Press keys 0, 7 and 7 for "Display group number 77" and confirm entry with "Q" key.
NOTE:
- The engine must not be loaded during this diagnosis, if this occurs the diagnosis will be aborted and will not start again until the engine is revved-up.
Indicated on display: (1...4 = display zones)
| System in basic setting 77 -> 1 2 3 4 |
If the diagnosis is initiated by the engine control module the display in display zone 4 jumps from "Test OFF" to "Test ON".
NOTE:
- This process can take approx. 40 seconds.
- Leave engine running at idling speed until display zone 4 displays specification "Syst. OK.".
If "Syst. OK" appears in display zone 4:
- Press → key.
- Press keys "0" and "6" for function "End output" and confirm entry with "Q" key.
- Switch ignition off.
If "Syst.n.OK." appears in display zone 4:
- Press → key.
- Check DTC memory: → 01 ON BOARD DIAGNOSTIC (OBD)
- Read readiness code: → 01 ON BOARD DIAGNOSTIC (OBD)
- Generate readiness code again if DTC memory has been erased or engine control module disconnected from permanent positive supply: → 01 ON BOARD DIAGNOSTIC (OBD)
If no DTC is stored in DTC memory:
- Press keys "0" and "6" for function "End output" and confirm entry with "Q" key.
- Switch ignition off.
- Check combi-valve → Combi-valve, checking .