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.
Chart C8 - Trans. CONV. Clutch (All Trans./Transaxles)
Fused battery ignition is supplied to the TCC Solenoid through the brake switch, and transmission/transaxle third gear apply switch. The ECM will engage TCC by grounding circuit 422 to energize the solenoid. TCC sill engage when: Engine is warmed up. Vehicle speed is above calibrated Throttle Position Sensor (TPS) output not changing, indicating a steady road speed. Transaxle third gear apply switch is closed. Brake switch is closed.
- Light off confirms transmission/transaxle third gear supply switch is open.
- At 20-25 MPH the transmission/transaxle third gear switch should close. Test light will come on and confirm battery supply and closed brake switch.
- Grounding the diagnostic terminal with engine "OFF" should energize the TCC solenoid. This test checks the capability of the ECM to control the solenoid.
- Solenoids and relays are turned "ON" and "OFF" by the ECM internal electronic switches called "drivers". Each driver is part of a group of 4 called Quad-Drivers. Failure of one can damage any other driver within the set.
NO RELATED
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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.