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Code 86: Traction Potentiometer
Out-of-Range
Traction Pot is outside the learned
voltage range. This code can also be
displayed if there is no power to the
TPA or if one of the power cables to the
traction motor(s) is open.
If code is displayed in conjunction with another code,
troubleshoot per that code. Verify battery voltage. If wrong
voltage, set correct voltage via FlashWare (and re-Learn
pots) or install correct voltage battery. Check both
traction motor encoders, temperature sensors, and
connections. Check power to the TPA. Check the power
cables to the traction motor(s). Check pot voltages. Check
resistance of resistor in static strap standoff; should be
200 to 250k ohm. Verify configuration jumpers are in
place on PPA. If OK, run Learn. If not OK, replace the pot.
Had the unit repaired. 86 seems to be a motor controller board failure. This set us back over $10K. Good little unit but parts are hard to come by and very expensive.
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