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.
Shift Lock Control Unit: Protege5
Remove the shift lock control unit. See SHIFT LOCK CONTROL UNIT under REMOVAL & INSTALLATION. Connect harness connector. Turn ignition on. Measure voltage at each shift lock control unit terminal. See Fig 1 . If voltage is not as specified, inspect components listed under ACTION column. If no problems are found with any components or wiring harnesses, replace the shift lock control unit. See SHIFT LOCK CONTROL UNIT under REMOVAL & INSTALLATION.
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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.