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Terex ta27
- Thread starter Lucas
- Start date
Bigbert
Senior Member
Hi Lucas,
assume, something wrong with gear selector signals. "NN" means "Not Neutral".
Gear selector needs to provide a "F" signal in Forward position, no "N", no "R". In neutral only "N", in reverse only "R" signal. If two signals stay too long parallel or no signal for drive direction R, TCU will throw a "NN".
So, either there is no "R" in reverse or "N" doesn't disappear when going out of neutral.
A2 is the gear selector with its signals, (T+ and T- up- and downshift signals)
assume, something wrong with gear selector signals. "NN" means "Not Neutral".
Gear selector needs to provide a "F" signal in Forward position, no "N", no "R". In neutral only "N", in reverse only "R" signal. If two signals stay too long parallel or no signal for drive direction R, TCU will throw a "NN".
So, either there is no "R" in reverse or "N" doesn't disappear when going out of neutral.
A2 is the gear selector with its signals, (T+ and T- up- and downshift signals)
