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.
All Doors Do Not Lock Or Unlock Using Driver's Door Lock Knob
Check driver's door lock knob switch. See DOOR LATCH ASSEMBLY under COMPONENT TESTS. Check multiplex control unit input. See MULTIPLEX CONTROL UNIT INPUTS (KEYLESS ENTRY SYSTEM) under SYSTEM TESTS. Check for poor contact at ground connectors (G401, G402 or G251). See WIRING DIAGRAMS . Also check for open in circuits between door latch assembly and multiplex control unit.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.