Required tools:
* Multimeter (voltmeter/ohmmeter)
* Power supply 12 V (battery or power supply)
* Connecting wires
* Automatic transmission valve body wiring diagram (if available)
Verification procedure:
1. Disconnect the battery.
2. Find the automatic transmission valve body. It is usually located on the side of the transmission.
3. Remove the valve body from the transmission. This may require special tools.
4. Determine the location of the solenoids. The valve body wiring diagram can help you with this.
5. Checking the resistance of the solenoids:
— Set the multimeter to ohmmeter mode.
— Connect one probe to the positive terminal of the solenoid and the other probe to the negative terminal.
— Record the resistance reading.
— Compare the readings with the technical specifications specified in the repair manual. Solenoids with highly deviating resistance should be replaced.
6. Checking the operation of solenoids:
— Set the multimeter to voltmeter mode.
— Connect one probe to the positive terminal of the battery and the other probe to the positive terminal of the solenoid.
— Connect the negative terminal of the battery to the negative terminal of the solenoid.
— If the solenoid engages, you will hear a click and see the solenoid rod move.
— Repeat the procedure for other solenoids.
Notes:
*Before checking, make sure that the solenoids and connecting wires are not damaged.
* Replace faulty solenoids.
* After checking, reinstall the valve body and connect the battery.