VSS settings - LS3 with TR-6060 manual trans and E38 ecm (DTC: P0502)

[snichols28]

Still getting P0502: Vehicle Speed Sensor A Circuit Low (Permanent) since my tune and I just can't figure this darn thing out! I'm trying to learn all of this tuning stuff My vehicle logs are not showing any vehicle speed. My VSS is connected properly, pins in the ECM connector are double checked and in correct position. (I wasn't having any of these issues before my dyno tune. Blah!)

Anyone available to help with looking over my settings under the "Speedometer" tab? I read a lot about other people's VSS questions/issues, and look at other tunes, but it seems like a majority of those similar concerns relate to the T56 trans and not my TR-6060 (I can't find any literature that tells if settings will be the same for these two transmissions)

Vehicle: '68 Camaro with LS3, TR-6060, and E38 ecm all out of a 2013 Camaro SS
Rear tires: 335/30R18 --- 798 revolutions/mile --- 26.06" diameter (should be 81.87" circumference from what I'm finding?)
Rear gear ratio: 3.70

I went off beshyster's recommendation of taking my 3.70 gear ratio divided by 3.33 (40 divided by 12) to get 1.11 corrected gear ratio and have that plugged into my settings.

Hardware
Speed Output Type -- should I have this set to "WheelSpd", "VehSerial", or VehRep TOS" ?
VSS Pulses Per Rev -- is 40.000 correct?
Driven Pulse/Rev -- is 12.0 correct?
Non-Driven Pulse/Rev -- is 12.0 correct?

Vehicle Speed Sensor
Vehicle Speed Output -- should I have this set to "Disabled", Rep TOS", or "Serial" ?
Pulse Average -- is 15 correct?
Max Period -- is 20 correct?
Serial Min Freq -- is 1Hz correct?

Gear Ratio & Tire Size
Driven Tire Circ. -- 81.87" but HPTuners rounded down to 81.850 in.
Non-Driven Tire Circ. -- 81.87" but HPTuners rounded down to 81.850 in.

Final Drive
Ratio -- 1.10:1
Ratio - Error -- 1.10:1

Sensor Calibration
VSS Tire Revs per Dist -- 797.98
VSS Tire Revs per Dist - Err -- 798.01 (HP Tuners wouldn't let me put 797.98?)

Any help/suggestions are greatly appreciated!!

[brawls43]

Ever have any luck with this? Looks like you for no replies

[snichols28]

Yah, got it dialed in after I fixed a wiring issue from the place that made the wire harness. It drove me crazy for a long time. All better now!

Ever have any luck with this? Looks like you for no replies

[brawls43]

How did you wire or fix the wiring? I've got a similar issue, but with a Camaro LS3 and a T-56. The TR6060 has a VSS sensor too right? Did you wire straight to pins 71-72?

[snichols28]

How did you wire or fix the wiring? I've got a similar issue, but with a Camaro LS3 and a T-56. The TR6060 has a VSS sensor too right? Did you wire straight to pins 71-72?

The TR6060 transmission of mine has a VSS and a fluid temp sensor ...and both of those plugs are the exact same. The guy that made the harness for me accidentally labeled the two plugs backwards so they were plugged in backwards accidentally after I had the wire harness apart looking for the issue. Got them plugged into the correct sensors and it got me back on track. I did trace and double check wires at the time and the 71-72 pins do sound correct (I don't have any of the wiring diagrams in front of me so I can't be 100% sure of those pins but they sound correct)

[brawls43]

Did you end up using the settings you mentioned in your first post? I can't find the post you reference from beshyster on how to do the calcs.

Thanks

[brawls43]

So our's was the plugs also. Ugh. Thanks for the pointer. Having previously updated the tire size, everything worked correctly. Boom, thanks!

[Chevymanreem]

The TR6060 transmission of mine has a VSS and a fluid temp sensor ...and both of those plugs are the exact same. The guy that made the harness for me accidentally labeled the two plugs backwards so they were plugged in backwards accidentally after I had the wire harness apart looking for the issue. Got them plugged into the correct sensors and it got me back on track. I did trace and double check wires at the time and the 71-72 pins do sound correct (I don't have any of the wiring diagrams in front of me so I can't be 100% sure of those pins but they sound correct)

I?m trying to figure out if the wires from the ecu 71 and 72 have a certain orientation in the plug end into the vss

[danmw2003]

Circuit low fault codes, are generally caused by high resistance in that circuit. If you or anyone prior, were using a paperclip shoved in connectors to check wiring, you likely spread the female pins. Or you have a pinched/smashed wire somewhere.