What does diagnostic trouble code p1777 Nissan mean?
The Step Motor changes the step by turning 4 coils ON/OFF according to the signal from Transmission Control Module (TCM). As a result, the flow of line pressure to the primary pulley is changed and the pulley ratio is controlled. The Diagnostic Trouble Code (DTC) will set when the Step Motor does not respond to the TCM command.
When is the p0777 OBD-II trouble code set?
When the P0777 OBD-II trouble code is set, the Powertrain Control Module (PCM) has detected a problem with the Transmission Pressure Control Solenoid “B”. Most automatic transmissions incorporate at least three solenoids that are solenoid A, B and C.
What are the trouble codes for the Solenoid B?
The trouble codes related to the “B” solenoid are codes P0775, P0776, P0777, P0778 and P0779. The code set is based on the specific malfunction that alerts the PCM and illuminates the Check Engine Light.
The Step Motor changes the step by turning 4 coils ON/OFF according to the signal from Transmission Control Module (TCM). As a result, the flow of line pressure to the primary pulley is changed and the pulley ratio is controlled. The Diagnostic Trouble Code (DTC) will set when the Step Motor does not respond to the TCM command.
How to fix P1778 Nissan step motor function?
Faulty Step Motor Step Motor harness is open or shorted Step Motor circuit poor electrical connection How do I fix code P1778 NISSAN? Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
How much does it cost to repair a Nissan P1778?
The cost of diagnosing the P1778 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
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 does the P1778 code on a Jatco mean?
Code P1778 means you have a ratio issue. The TCM isn’t seeing the ratio it’s commanding. The TCM calculates this code based on the primary and secondary speed sensors. First make sure the speed sensor signals are good. If you have a speed sensor code, repair that problem first.
What’s the difference between circuit code p1777 and p17758?
There’s a major difference between codes P1777 and P1778: Code P1777 is a circuit code. If you have code P1777, you need to check the connectors, wiring, and the stepper motor windings. The resistance check would be a good start, or you could also perform the same test at the TCM.
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.
There’s a major difference between codes P1777 and P1778: Code P1777 is a circuit code. If you have code P1777, you need to check the connectors, wiring, and the stepper motor windings. The resistance check would be a good start, or you could also perform the same test at the TCM.
Why do I have a speed sensor code of P1778?
If you have a speed sensor code, repair that problem first. If the speed sensors are in good operating condition, you have an internal transmission issue. The most common issues that cause the P1778 code are flow control valve wear, pulley leaks, and a worn or sticky valve body.
If you have a speed sensor code, repair that problem first. If the speed sensors are in good operating condition, you have an internal transmission issue. The most common issues that cause the P1778 code are flow control valve wear, pulley leaks, and a worn or sticky valve body.