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DTC 63: No. 2 Solenoid Circuit

NOTE: A stuck solenoid will not set a trouble code. Trouble codes are only set for circuit malfunctions, not mechanical failures.
  1. Ensure ignition is off. Access ECT ECU. See Figure-Figure . Disconnect ECT ECU harness connector. On Lexus models and Supra Turbo, install check harness between ECT ECU and harness connector. On all models, using ohmmeter, check resistance between ECT ECU terminal S2 and body ground at ECT ECU harness connector or at check harness. See Figure and Figure .
  2. Resistance should be 10-16 ohms. If resistance is okay, replace ECT ECU. If resistance is not within specification, remove transmission oil pan. Disconnect electrical connector at No. 2 solenoid (Red/White wire on 4-cylinder models, Black wire on all other models).
  3. Check resistance between electrical terminal on No. 2 solenoid and body ground. Replace No. 2 solenoid if resistance is not 10-16 ohms. If resistance is 10-16 ohms, check wiring between No. 2 solenoid and ECT ECU. See appropriate wiring diagram in WIRING DIAGRAMS .
  4. If wiring is okay, check performance of solenoid. See SOLENOIDS under COMPONENT TESTS . Replace as needed. If solenoid is functioning okay, replace ECT ECU and retest.
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