Measuring value block 66

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Fig 1: Measuring Value Block 66, Cruise Control

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Indicated on display

Fig 2: V.A.G 1551 Scan Tool Display - Measuring Value Block 66, Cruise Control (1 Of 4)

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Check indications in display fields 2 and 4

Check of indication in display field 2

Fig 3: V.A.G 1551 Scan Tool Display - Measuring Value Block 66, Cruise Control (2 Of 4)

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TEST CONDITION FOR DISPLAY FIELD 2 - CRUISE CONTROL

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).

VAG 1551 scan tool display indicates control module coding, for example:

Fig 4: V.A.G 1551 Scan Tool Display - Measuring Value Block 66, Cruise Control (3 Of 4)

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CONTROL MODULE CODING EXAMPLE - CRUISE CONTROL

Value	Explanation
4D0907558..	Control module number (see replacement parts program)
4.21	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 system
D..	Data version (software version) of control module
Coding 6753	Engine Control Module (ECM) coding
WSC 06812	Factory identification from VAG 1551, with which the last coding was performed

If there is no "G" under component identification, cruise control must be activated first. See CCS, activating .

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 ideal, as long as a driving mode (aside from -1- or -R-) is selected.

Check of indication in display field 4

Fig 5: V.A.G 1551 Scan Tool Display - Measuring Value Block 66, Cruise Control (4 Of 4)

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Fig 6: Identifying Cruise Control Switch

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CRUISE CONTROL TEST CONDITIONS - 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 ELECTRICAL TEST USING VAG 1598/31 TEST BOX .