Operation 'Basket Case MJ'

[eaglescout526]

Ahh the Dana cruise control. As long as all else works, the module can be blamed easier than the Renix ECU. I think I’ve got a pile of these back when I was making full kits for folks

[Gojira94]

I updated the thread in the Pub on the cruise tester tool. I'm using a GM brake switch and I wired it wrong. My gut told me the brake switch was going to be at the heart of the issue before I started troubleshooting. Not for the reasons I thought, but I think I solved it and proved out the rest of the parts along the way. The regulator could still be bad. Just need a test drive as soon as I can manage it.

[Gojira94]

Regulator adjustments pots on my regulator ohm out as follows, will vary some with other regulators:

 

A - Centering Adjustment

MIN = 323 ohms

MAX = 4150 ohms

10:00 = 1500 ohms (20.83%)

 

B - Low Speed Adjustment

MIN = 108 ohms

MAX = 3975 ohms

10:00 = 1096 ohms (20.83%)

 

C - Sensitivity Adjustment

MIN = 1.9 ohms

MAX = 21,200 ohms (100%)

12:00 = 11,260 ohms (50%)

 

I test drove with the following settings:

A - 2236.5 ohms (about 11:45)

B - 90 ohms (about 8:45)

C - 10,600 ohms (about 11:45)

 

Cruise works but it's going to need some adjustments, going to the recommended 10:00 / 10:00 / MAX for A, B, C. Centering was too high, as it set and just kept slowly pulling speed higher and higher. I read some Dana documentation and found out Low Speed adjustment is NOT the minimum speed at which you can 'Set' cruise. It's the minimum speed at which 'Resume/Accel' will begin to resume after a brake or clutch switch is activated, with the cruise switch still set to 'On.'

[eaglescout526]

2 hours ago, Gojira94 said:

read some Dana documentation and found out Low Speed adjustment is NOT the minimum speed at which you can 'Set' cruise.

Fun fact, AMC testing procedures for testing the module is to set the pots to a “default” and test and see if cruise control engages at 30mph. That’s the absolute lowest it will engage and set at. 

[Gojira94]

Dana manual says to set cruise around 45MPH, brake and slow to about 18MPH. Then press and hold resume/accel and manually accelerate slowly until the gas pedal starts to pull away under your foot, accelerating back to previously set speed on its own. The speed at which that happens is the "Low Speed."