Cruise Control problem on S4 B6.

[elmo]

Anyone know whether the cruise control has a seperate fuse?

My cruise control has stopped working, but the list of fuses in the O&M manual does not cover this function.

Also the list of fuses does not correspond with the fuse box in the car, as mine does not have any fuses in the two slots that say they are for the sidelights! There also are no contactors in these slots either.

Anyone have a more detailed fuse list for the S4 B6?

I've tried the three fuses that state they are for the engine managment system and these are fine.

Recently had a new ignition switch fitted and I think they may have disconnected a plug while doing it, but would prefer to check the simple things like fuses before I go back to them and discover it's something else and they hit me with a £40 diagnostic fee.

[PetrolDave]

Check the clutch switch - if that's failed then the cruise won't engage.

A VAG-COM scan would be a good idea too.

[elmo]

Thanks PetrolDave.

What control module covers the clutch switch? 01-Engine or other?

Thanks in advance.

[PetrolDave]

I was thinking of a scan to check for any fault codes from both the engine ECU and the SCSM.

[elmo]

Did a full scan and came up with the following faults

VAG-COM Version: Release 409.1-S


Chassis Type: 8E - Audi A4 B6
Scan: 01,02,03,08,09,15,16,17,26,36,37,45,46,55,56,63,76

-------------------------------------------------------------------------------
Address 01: Engine
Controller: 8E0 910 560 R
Component: 4.2L V8/5V G 0010
Coding: 0011711
Shop #: WSC 63351
3 Faults Found:
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 002 - Lower Limit Exceeded - Intermittent
17977 - Cruise Control Switch (E45): Implausible Signal
P1569 - 008 - Implausible Signal
19497 - Powertrain Databus Implausible Engine Temp. Message from Inst. Panel
P3041 - 004 - No Signal/Communication - Intermittent
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 03: ABS Brakes
Controller: 8E0 614 517 Q
Component: ABS/ESP allrad 4533
Coding: 04595
Shop #: WSC 00409
No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC
Controller: 8E0 820 043 AH
Component: A4 Klimaautomat 1323
Coding: 00000
Shop #: WSC 63351
No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.
Controller: 8E0 907 279 F
Component: int. Lastmodul RDW 0517
Coding: 01011
Shop #: WSC 63351
No fault code found.

-------------------------------------------------------------------------------
Skipping Address 15-Airbags

-------------------------------------------------------------------------------
Address 16: Steering wheel
Controller: 8E0 953 549 N
Component: Lenksáulenmodul 0611
Coding: 01041
Shop #: WSC 63351
1 Fault Found:
00895 - Cruise Control Switch (E45)
04-00 - Mechanical Malfunction

-------------------------------------------------------------------------------
Address 17: Instruments
Controller: 8E0 920 980 L
Component: KOMBI+WEGFAHRS. RB4 D37
Coding: 01401
Shop #: WSC 00618
WAUZZZ8E54A262837 AUZ6Z0C0196452
1 Fault Found:
01039 - Coolant Temperature Sensor (G2)
30-10 - Open or Short to B+ - Intermittent

-------------------------------------------------------------------------------
Address 45: Inter. Monitor
Controller: 8E0 951 177
Component: Innenraumueberw. 0704
Coding: 00001
Shop #: WSC 00000
No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.
Controller: 8E0 959 433 BC
Component: Komfortgerát T3B 1412
Coding: 06891
Shop #: WSC 63351
No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range
Controller: 4Z7 907 357
Component: dynamische LWR D09
Coding: 00060
Shop #: WSC 63351
No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio
Controller: 8E0 035 195 M
Component: symphony II NP2 0410
Coding: 01200
Shop #: WSC 00768
No fault code found.

-------------------------------------------------------------------------------
Address 76: Park Assist
Controller: 8Z0 919 283 A
Component: Parkingsyst. A4 RDW D09
Coding: 00104
Shop #: WSC 63351
No fault code found.

End --------------------------------------------------------------------------------------------------

Obviously a mechanical fault problem with the Cruise Control Switch (E45). But which of the switches is this, brake, clutch or steering column?

I apologise for my ignorance. It took me long enough to get my VAG-COM scanning fully!

Any help would be most gratefully received.

[elmo]

Did a further scan looking at the measure Block function of block 066.

I am getting the following databits

Nothing pressed or engaged - 00001000

Clutch depressed - 00001100

Brake depressed initially - 00001001

Brake pressed harder - 00001011

Both brake and clutch pressed - 00001111

Then after approximately 2 minutes I am getting the fault code stated above.

When I scan the block 066 I am seeing the following databits - 11001000

If this is a problem with the switch at the steering column, is this a major job to fix?