Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
No Lock-up
The PCM commands shift solenoid valve D to remain OFF, and shift solenoid valve D covers the shift solenoid valve D pressure port (SD) to the lock-up shift valve. The lock-up shift valve is in the right side, and uncovers the torque converter pressure port leading to the back of the torque converter. Torque converter pressure (92), regulated by the regulator valve, flows to the lock-up shift valve and becomes torque converter pressure (94). Torque converter pressure (94) enters into the back of the torque converter, and discharges into the circuit from the front of the torque converter. Torque converter pressure enters into the back of the torque converter and is discharged from the front side; this disengages the torque converter clutch piston and the torque converter cover. Under this condition, the torque converter clutch is not engaged; this is the non lock-up condition.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.