Measuring value block 66
Indicated on display
Check indications in display fields 2 and 4
Check of indication in display field 2
TEST CONDITION: DISPLAY FIELD 2
| Test condition | Display field 2 |
|---|---|
| cruise control system released (activated) | 1000 |
| Brake operated (brake light switch) | 1011 |
| Clutch engaged | 1100 |
If the specified value in display field 2 for "cruise control system release" (1000) is not obtained:
- Check control module identification of current Engine Control Module (ECM).
See appropriate article in ENGINE PERFORMANCE.
VAG1551 scan tool display indicates control module coding, for example:
- 4D0907558.. Control module number (see replacement parts program)
- 4,2l Engine displacement
- V8/5V Construction style of engine (V engine, 8 cylinder, 5 valves)
- "G" i.e. no indication Vehicle with or without cruise control
- 0003 Data version (software version) of control module
- Coding 6752 Engine Control Module (ECM) coding
- WSC 6812 Factory identification from VAG1551, with which the last coding was performed
- If component identification "G" is displayed, cruise control must be activated. See ACTIVATING CRUISE CONTROL SYSTEM .
Only for vehicles with automatic transmission:
- Road test vehicle and exceed 30 km at least once. Do not switch off engine upon completion. Leave selector lever in -2-, -3- or -D-.
- Engage parking brake.
NOTE:
For vehicles with automatic transmission, the voltage supply for the cruise control switch is not switched on until a speed of above 30 km/h is reached with selector lever in position -2-, -3- or -D-. The voltage supply will then be maintained at idle, as long as a driving mode (aside from -1- or -R-) is selected.
Check of indication in display field 4:
TEST CONDITION: DISPLAY FIELD 4
| Test condition | Display field 4 |
|---|---|
| Switch B at "OFF" (engaged) | 0000 |
| Switch B at "ON" | 0011 |
| Memory set, switch B at "OFF" - before point of engagement | 0001 |
| Switch A pressed, "Set" | 0111 |
| Switch B pulled to "RESUME" | 1011 |
If the specified values in display field 4 are not obtained, although switch B is set to "ON" (0011):
- Connect VAG1598/31 test box to wiring harness for Engine Control Module (ECM). See WIRE AND COMPONENT TEST USING VAG1598/31 TEST BOX .