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Component Testing: Solenoids

NOTE: The No. 1 and No. 2 solenoids and lock-up solenoid can be checked. Resistance and operation can be checked with solenoid on the vehicle.
  1. Ensure ignition is off. Disconnect electrical connector from ATCM, located near center console. See Figure . Note ATCM electrical connector terminal identification. See Figure .
  2. Using Digital Volt-Ohmmeter (DVOM), check resistance between terminals No. 10, 11 and 12 of ATCM electrical connector and body ground. See Figure .
    NOTE: Terminal identification is as follows: terminal No. 10 is lock-up solenoid, terminal No. 11 is No. 2 solenoid and terminal No. 12 is No. 1 solenoid. Lock-up solenoid may be referred to as No. 3 solenoid.
  3. If resistance is not 11-15 ohms, check for open or short circuit in solenoid wiring. Replace solenoid if wiring is okay.
  4. To check solenoid operation, apply battery voltage to terminals No. 10, 11 and 12 of ATCM electrical connector for proper solenoid. Ensure operating sound can be heard when battery voltage is connected. Replace solenoid if operating sound cannot be heard.
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