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.
Memory Seat/Mirror Module Diagnostic Modes
Memory seat/mirror module has 2 diagnostic modes to test motor and position sensor inputs. To enter diagnostic modes, ignition must be off. If ignition is turned to RUN or START when module is in diagnostic mode, module will exit diagnostics and sound 3 chimes.
Mode 1 diagnostics tests all memory, seat and mirror switch inputs. To enter Mode 1, ground memory seat diagnostic connector. See COMPONENT LOCATIONS . Module will chime once to indicate that Mode 1 has been entered. All memory seat and mirror functions are disabled in this mode. When memory seat or mirror switch is operated as if performing a function, memory seat/mirror module should chime once to indicate input has been received.
Mode 2 diagnostics tests seat and mirror position sensor inputs. To enter Mode 2, remove ground from memory seat diagnostic connector, then reapply within 5 seconds. Module will chime 2 times to indicate that Mode 2 has been entered. Memory seat and mirrors are not disabled in this mode. When memory seat or mirror switch is operated, memory seat/mirror module will monitor inputs from position sensors. If one chime is heard during any switch operation, memory seat/mirror module has found a problem with that position sensor or its circuits. If recline position sensor is tested, module will chime.
To exit diagnostic mode, either remove ground from memory seat diagnostic connector for more than 5 seconds or turn ignition switch to RUN or START position. When module exits diagnostic mode, 3 chimes will sound.
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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.