- inspection ditch or overpass;
- multimeter.
Examination
1. Prepare the car for work (see "Preparing the car for maintenance and repair").
2. Remove the engine splash guard or engine crankcase protection (if installed).
3. Disconnect the wiring harness from the solenoid.
4. Using a voltmeter, check the voltage at terminal 1 of the connector (which the red wire goes to). When the ignition is on, there should be a voltage of about 12 V at the terminal. If there is no voltage or it is less than 10 V, check the fuse F21 of the solenoid circuit (see "Mounting Block - Replacing Fuses and Relays" and "Checking the technical condition of electrical equipment").
5. Using an ohmmeter, measure the electrical resistance of the solenoid coil, which should be about 13 ohms.
6. If the solenoid resistance is normal, apply 12 V from the battery to its terminals. A characteristic click should be heard. We replace the faulty solenoid.
Recommendation. If the check does not reveal a fault and the lock does not disengage, the reverse gear lock switch should be checked (see "Reverse Gear Lock Switch - Checking and Replacing"). If the switch is working properly, you should unscrew the solenoid from the box (see below) and make sure that when 12 V is applied to its terminals, the solenoid core is fully retracted.
Advice: If the reverse gear lock stops disengaging while driving, you can unscrew the solenoid by 8-10 mm. Tightly wrap insulating tape on the visible part of the solenoid thread. When crimping this tape, turn the solenoid several times so that there is a distance of 6-7 mm between the solenoid flange and the gearbox housing. When getting to the parking or repair site, be careful - when engaging first gear, reverse gear may be erroneously engaged.
Removal
1. Drain the oil from the gearbox (see "Gearbox - Checking the level and changing the oil").
2. Using a 36 mm open-end wrench, loosen the solenoid.
3. If there is no such key, use a 13 mm open-end wrench to unscrew the plug of the reverse gear engagement fork lock (it prevents the solenoid from being turned away).
4. Remove the retainer spring.
5. To avoid losing it, use a magnetic pointer to remove the retainer ball.
6. Using sliding pliers and a 36 mm open-end wrench, loosen the solenoid.
7. Unscrew the solenoid from the gearbox housing.
Installation
We install the new solenoid in the reverse order, having first applied sealant to its threaded part and removed any oil leaks from the gearbox housing.