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.
Solenoid S1 And S2
The solenoids S1 and S2 are located in the transmission control system, which is fitted on the front edge of the gearbox. The solenoids are the on/off type, and consist of an electrical coil which controls a hydraulic valve. The solenoids are supplied with 12 V power via the transmission control module (TCM) and are grounded in the control system. Solenoid S1 controls certain shifting and the transmission control module (TCM) activates solenoid S2 at engine braking for 1st gear.
The solenoids can be diagnosed.
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.
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