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.
2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
System Operation Check
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
- Trouble shooting of a remote keyless entry system complaint begins with verification of the customer problem. Perform the Customer Problem Analysis Check (Remote Keyless Entry System). See Fig 1.
- Inspect the communication function of the large-scale body multiplex communication system (BEAN). Check that there is no abnormality in the communication system by inspecting with a hand-held tester:
- (ECU unconnected, communication line abnormal) Without code outputs, go to step 3.
- (ECU unconnected, communication line abnormal) With code outputs, go to MULTIPLEX COMMUNICATION SYSTEM article in COMMUNICATION DEVICES.
- Check the diagnostic trouble code. See DIAGNOSTIC TROUBLE CODE DEFINITIONS table under SELF-DIAGNOSTIC SYSTEM:
- Refer to symptoms table. See SYMPTOM INDEX (WIRELESS DOOR LOCK CONTROL SYSTEM) table:
SYMPTOM INDEX (WIRELESS DOOR LOCK CONTROL SYSTEM)
Symptom Perform Test All Functions Of Wireless Door Lock Control System Do Not Operate (Power Door Lock System Does Operate) TEST B No Answer Back TEST C - Perform trouble shooting in the following method, depending on the malfunction symptom:
- Pre-check. See PRE-CHECK under SELF-DIAGNOSTIC SYSTEM. Inspection with hand-held tester (ECU DATA MONITOR) and hand-held tester (ACTIVE TEST).
- Terminal of ECU. See TERMINALS OF ECU under COMPONENT TESTS.
- On-vehicle inspection. See ON-VEHICLE INSPECTION .
- Perform necessary adjustments, repairs or replacements.
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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