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VZ Cruise Control doesn't work after E38 conversion

OldSkoolGP

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So it turns out I still have one small problem after converting my GTO to run on an E38. The cruise control will not engage.

Symptom: The Cruise Control can be turned On and Off, but cannot be activated:

Troubleshooting steps taken: Using a Tech 2, I am able to determine that the clutch pedal switch, the brake pedal switch, and the extended brake travel switch are all operating normally and I can watch them working in real time. The VSS is sending speed data that can be viewed in real time.

Observed Issue: On the Tech2, if I select Engine ---> GEN IV V8 ----> Data Display ---> Cruise Data, I can see all the values affecting the cruise. There is a value in this menu called Cruise Control Cancel that is always set to Active. This must be what is causing the issue, but I don't know what circumstances would cause it.

Like I said, the sensors work properly. I can see when I turn the Cruise On and Off in this menu, and I can see when I turn the knob on the stalk that I am switching the values for Set/Decel and Res/Accel between Active and Inactive. Anyone know what would cause this Cruise Control Cancel value to always be Active?

EDIT: Figured it out. I had one ECU Pin in the wrong location. Can't figure out how to delete the thread, but everything is resolved.
 
Last edited:

Fu Manchu

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Don't delete the thread. It’s likely to be helpful to someone.

Thanks for posting.
 
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Fu Manchu

We’ll get together. Have a few laughs.
Joined
Mar 18, 2006
Messages
17,900
Reaction score
22,556
Points
113
Location
WA.
Members Ride
VZ Crewman, VZ Cross 8, & ya mum.
So it turns out I still have one small problem after converting my GTO to run on an E38. The cruise control will not engage.

Symptom: The Cruise Control can be turned On and Off, but cannot be activated:

Troubleshooting steps taken: Using a Tech 2, I am able to determine that the clutch pedal switch, the brake pedal switch, and the extended brake travel switch are all operating normally and I can watch them working in real time. The VSS is sending speed data that can be viewed in real time.

Observed Issue: On the Tech2, if I select Engine ---> GEN IV V8 ----> Data Display ---> Cruise Data, I can see all the values affecting the cruise. There is a value in this menu called Cruise Control Cancel that is always set to Active. This must be what is causing the issue, but I don't know what circumstances would cause it.

Like I said, the sensors work properly. I can see when I turn the Cruise On and Off in this menu, and I can see when I turn the knob on the stalk that I am switching the values for Set/Decel and Res/Accel between Active and Inactive. Anyone know what would cause this Cruise Control Cancel value to always be Active?

EDIT: Figured it out. I had one ECU Pin in the wrong location. Can't figure out how to delete the thread, but everything is resolved.
Which pin?
 
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