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P1777 Nissan

P1777 Nissan - Step Motor Circuit

Possible causes
- Faulty Step Motor
- Step Motor harness is open or shorted
- Step Motor poor electrical connection
Tech notes
There is a factory service bulletin for the following Nissan Models:

2007-2008 Nissan Altima
2007-2008 Nissan Rogue
2007-2008 Nissan Sentra
The bulletin suggest replacing the transmission valve body.
Nissan Factory Service Bulletin OBDII Code P1777
P1777 Nissan Description

The step motor changes the step with turning 4 coils ON/OFF according to the signal from Transmission Control Module (TCM). As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled

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