Automatic transmission solenoids Nissan Almera N16

Automatic transmission solenoids Nissan Almera N16

Automatic transmission solenoids are solenoid valves that control gear changes in an automatic transmission. Nissan Almera N16 is equipped with a 4-speed automatic transmission RE4F04B, which has the following solenoids:

1. Torque Converter Lockup Solenoid (TCC)

*Activated when reaching a certain speed and throttle position
* Locks the torque converter, improving efficiency and fuel economy

2. Shift solenoid 1-2 (1-2 Sol)

*Activated for shifting from 1st to 2nd gear

3. Shift solenoid 2-3 (2-3 Sol)

*Activated for shifting from 2nd to 3rd gear

4. Line Pressure Solenoid (LPS)

* Regulates line pressure in the transmission, which determines shift pressure and clutch operation
*Controlled by Transmission Control Module (TCM)

5. Pressure control solenoid (PCS)

*Adjusts clutch pressure required to shift gears
*Also controlled by TCM

Solenoid locations:

The solenoids are located in the automatic transmission hydraulic control unit, which is located in the gearbox itself.

Troubleshooting:

Faulty solenoids can lead to the following problems:

* Problems with gear shifting
* Gear slippage
* Delays when shifting gears
*Transmission fluid leak

To diagnose solenoid faults, you can use an OBD-II scanner or perform a solenoid resistance test with a multimeter.

Replacement:

Only a qualified transmission technician should replace solenoids. Replacement usually involves the following steps:

* Removing the automatic transmission pan
* Removing the hydraulic control unit
* Replacement of faulty solenoids
* Reinstalling the hydraulic control unit
* Installation of automatic transmission pan
* Filling with new transmission fluid