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2015 TRX 500 FE wont shift, no code

3847 Views 7 Replies 4 Participants Last post by  Conor
Sorry if this has been gone over in other threads, I searched but couldn't find anything.

Bike was parked in working order, shifted into neutral. Started it up and no shift. I pulled the shift motor, tested it on 12V as per service manual, motor is fine. It doesn't get a signal. Tested continuity from shift buttons to PCM, it's good. Power from shift buttons to PCM checks out. So signal is going to PCM, but not going to shift motor. Replaced PCM. Still nothing. Power to shift angle sensor at 5V as per spec. Voltage and resistance varies when rotating angle sensor hub. But... shouldn't the angle sensor be spring loaded? It rotates freely in circles. Could this be the problem? But why no DTC?
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The shift motor may be getting power but not turning. Does the manual shift tool work?
So with the shift motor removed but plugged in, the shift buttons do not activate the motor.
That means the PCM is in error mode, or it does not work. Since you replaced the PCM (at great expense?), the new one should work. So that leaves the wiring.
The wires from the PCM to the shift motor could be cut, or grounded.
The serial data link wire from the PCM to the Display could be bad. That would explain no error code.
Unfortunately, even if you knew the error code, it may not help fix the problem. The PCM sometimes gets confused.

I have a PCM bypass kit that will fix your problem. It will act just like the manual shift tool as far as the PCM is concerned.
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