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.
Scan Tool Data Definitions
- TCC Brake Pedal Switch
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The scan displays Applied/Released. This parameter indicates the state of the brake switch circuit. Applied indicates a B+ voltage input when the brake switch is closed and the brake pedal is applied. Released indicates a zero voltage input when the brake switch is open and the brake pedal is released. When the brake pedal is applied, the torque converter clutch (TCC) brake pedal switch energizes the shift lock relay in order to disengage the shift lock. The TCC brake pedal switch also sends signals to the PCM, the cruise control servo and the ABS EBCM.
- Transmission Range
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The scan tool displays Park or Neutral when the transmission is in Park or Neutral and Reverse, Drive, Second or Low when the transmission is operating in forward or reverse gears.
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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