To check the automatic transmission solenoids you will need:
* Multimeter
*12V power supply
* Jumper
Instructions:
1. Definition of solenoids:
* Determine the location of the solenoids on the automatic transmission. They are usually located on the top or side of the transmission and have electrical connections.
*Refer to the transmission wiring diagram to determine which connectors correspond to which solenoids.
2. Removing connectors:
* Remove the electrical connectors from the solenoids.
3. Check for a break:
Using a multimeter in ohmmeter mode:
* Set the multimeter to the lowest resistance range (usually ohms or kohms).
* Connect one probe to the “+” terminal of the solenoid and the other probe to the “-” terminal.
* If the multimeter shows a resistance close to zero, then there is no break.
* If the multimeter shows infinite resistance (OL), then there is an open.
4. Short circuit test:
* Connect one multimeter probe to the “+” contact of the solenoid, and the other probe to the automatic transmission housing.
*If the multimeter shows low resistance, there is a short circuit.
*If the multimeter shows high resistance, then there is no short circuit.
5. Checking solenoid activation:
*Connect the positive lead of the 12V power supply to the “+” terminal of the solenoid.
* Connect the negative wire of the 12 V power supply to the automatic transmission housing.
*Using a jumper, close the “+” and “-” contacts of the solenoid.
* If the solenoid activates (you can hear a click), it is working properly.
*If the solenoid does not activate, it is faulty.
Note:
* During testing, do not touch the solenoid contacts with your hands, as this may result in electric shock.
* Do not apply power to the solenoid for a long time as this may damage it.
*If you find a faulty solenoid, it is recommended that you have it replaced by a qualified mechanic.