Checking the automatic transmission resistor with a multimeter
Materials:
* Multimeter
* Automatic transmission resistor
Steps:
1. Set the multimeter to resistance measurement mode. This is usually indicated by the symbol “?” on the switch.
2. Connect the multimeter probes to the resistor contacts. Make sure the probes fit snugly against the contacts.
3. Read the readings on the display. The measurement should be displayed in ohms (?).
4. Compare the obtained value with the specified nominal value of the resistor. The nominal value is usually indicated on the resistor body.
5. Determine the deviation from the nominal value. The tolerance depends on the type of resistor and is usually between 5% and 10%.
Interpretation of results:
*If the multimeter reading is close to the nominal value: the resistor is functioning normally.
* If the multimeter reading is significantly higher than the nominal value: the resistor has a high resistance or is open.
*If the multimeter reading is significantly lower than the rated value: the resistor has low resistance or has a short circuit.
Note:
* Some automatic transmission resistors may have non-linear resistance, which can affect the multimeter readings. In this case, it is recommended to use a specialized automatic transmission resistance tester to check the resistor.
*If you are unsure of the test results, it is recommended that you contact a qualified mechanic for further diagnosis.