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.
1994 Buick LeSabre CustomFACTORY OEM SERVICE PROCEDURE
Remote Keyless Entry Lock/Unlock Isolation Test
- Connect Tech 1 with body cartridge to Data Link Connector (DLC). Command Tech 1 to unlock all doors. If doors do not unlock, go to REMOTE DOOR LOCKING TEST .
- If doors do unlock, input Tech 1 to lock all doors. If doors do not lock, go to REMOTE DOOR LOCKING TEST . If doors lock, command Tech 1 to unlock driver's door only. If driver's door does not unlock, go to LEFT FRONT DOOR ISOLATION RELAY TEST .
- If driver's door unlocks, set Tech 1 to monitor transmitter signals received by RAC module. Press all transmitter buttons. If Tech 1 recognizes some but not all buttons, repeat test using second transmitter supplied with vehicle. If Tech 1 recognizes all buttons, ensure Remote Accessory Control (RAC) module connector makes good terminal contact. If connector is okay, replace transmitter. If Tech 1 recognizes some but not all buttons, check RAC module connector for good terminal contact. If terminal contact is okay, replace RAC module.
Factory Service Tools
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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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