What does a transmission stepper motor do?
Transmission step motor has high precision, low motor heat, low vibration. Low energy consumption, high efficiency stepper motor can maintain stable car performance.
How do you relearn a CVT transmission?
Nissan CVT Clutch Point Relearn Procedure
- Start the engine and allow the transmission to warm to 122ºF (50ºC).
- Turn AC off.
- Move the shift selector to the Park position, turn ignition off, then wait 5 seconds.
- Start the engine and allow it to idle for 5 seconds.
- Turn the ignition off and wait 30 seconds.
How much does it cost to replace a step motor?
A step motor from Ebay or Amazon will generally cost around $30 compared to replacing the CVT for around $3,000 or more.
How does a stepper motor fail?
One of the major problems with a stepper motor is complete motor failure. This problem is caused by excessive current being sent to the device by the power supply. A short circuit in the wiring from the power supply to the motor cause this problem with the stepper motor. Some application will cause this short circuit.
What does P1778 code mean?
|P1778 Meaning This diagnosis item detects when the electrical system is OK, but the mechanical system is NG. This diagnosis item detects when the state of the changing the speed mechanism in the unit does not operate normally.
What happens if CVT transmission fails?
Along with the other common symptoms of a bad CVT transmission, surging can be a sign of contaminated transmission fluid. When your transmission becomes too polluted or filled with debris over time, your vehicle might begin to accelerate, jerk, lurch. Jump forward, or fall back for no apparent reason.
What causes the P1778 code on a CVT?
The most common issues that cause the P1778 code are flow control valve wear, pulley leaks, and a worn or sticky valve body. The next Jatco CVT you get in with a stepper motor code, think twice before replacing the stepper motor.
What is the code for the CVT stepper motor?
To keep it simple, the stepper motor can extend or retract, moving the position of the ratio control valve. The transmission control module knows that the stepper motor controls the ratio. When it sees a ratio issue, it blames the stepper motor and sets stepper motor code P1778.
What does p1777 mean on Nissan step motor circuit?
The P1777 code means that there is a problem with transmission. You next step is to have the dealer or a transmission shop inspect the transmission. Make sure to contact your dealer and ask if the transmission is still cover under warranty. 2007 altima passed warranty. Same code and can’t afford a new transmission.
What is the stepper code on a JATCO CVT?
If you’ve had to diagnose a Jatco CVT transmission by now, chances are you’ve seen the familiar stepper motor code, P1778. The stepper motor is one of the most over-replaced parts in these CVTs.