Possible causes
– Step Motor harness is open or shorted
– Step Motor poor electrical connection
– Faulty Step Motor
– Step Motor poor electrical connection
– Faulty Step Motor
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
NISSAN Technical Service Bulletins for P1777 code
2009 NISSAN CUBE POWER TRAIN:AUTOMATIC TRANSMISSION
2009 NISSAN VERSA POWER TRAIN:AUTOMATIC TRANSMISSION
2010 NISSAN CUBE POWER TRAIN:AUTOMATIC TRANSMISSION
2010 NISSAN VERSA POWER TRAIN:AUTOMATIC TRANSMISSION
2007 NISSAN ROGUE POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)
2007 NISSAN SENTRA POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)
2008 NISSAN ALTIMA COUPE POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)
2008 NISSAN ROGUE POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)
2008 NISSAN SENTRA POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)