Activating
Diagnosis, Fault Memory - PassatTest value block (Function 08), activating
For control units starting October 1990:
49 States and Canada: 8A0 908 404
California: 893 907 404 Q
Note: When using Function 08 "Reading measuring value block" only one channel can be displayed at a time. The channel is indicated by the 00 portion of the display.
Requirements
- fuses 15 and 31 OK
- ECU (at intake manifold) and battery ground connections OK
- connect VAG 1551 Diagnostic Tester using adaptor cable VAG 1551/1 as follows
- first connect black terminal of tester to black diagnostic connector 1
- alternating displays will appear as shown
[ VAG - Self Diagnosis HELP ]
[ 1 - Rapid data transfer* ]
or
[ VAG - Self Diagnosis HELP ]
[ 2 - Blink code output* ]
- connect white terminal of tester to brown or white diagnostic connector
If no display (no power to tester)
- do not connect white terminal of tester
- check diagnostic connector voltage supply using wiring diagram, repair or replace as necessary.
- start engine and let idle
- observe display on VAG 1551 Diagnostic Tester
- press 0 and 1 buttons to obtain "rapid data transfer" mode
- press Q button to enter input
- push -> button
- press 0 and 8 buttons to obtain Function 08 "Read measuring value block"
- press Q button to enter input
- display will appear as shown
[ Read measuring value block HELP ]
[ Insert display group number XX ]
- press 0 button twice to select "Indicator Group 00"
- display will appear as shown
[ Read measuring value block Q ]
[ Input indicator group number 00 ]
- press Q button to enter input
- display will appear as shown (values 1 through 10 = channels)
[ Read measuring value block ]
[ 1 2 3 4 5 6 7 8 9 10 ]
Notes
- indicator group 00 shows only "Reading measuring value block"
- values are shown in decimal form.
- when the 08 Function is selected, DIS (digital idle stabilization) and the carbon canister solenoid valve 1 continue to operate.
- the channel test values are continuously displayed regardless of RPM range.
- push -> button
- display will appear as shown
[ Rapid data transfer HELP ]
[ Select function XX ]
- push 0 and 6 buttons to select Function 06 "Ending output"
- display will appear as shown
[ Rapid data transfer Q ]
[ 06 - Ending output ]
- press Q button to enter input