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.
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HOMESERVICE MANUALSNISSAN-DATSUN2009SENTRA L4-2.0L (MR20DE)REPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSREMOTE KEYLESS ENTRY SYSTEMREMOTE KEYLESS ENTRY RECEIVER CHECK
2009 Nissan-Datsun Sentra L4-2.0L (MR20DE)
Remote Keyless Entry Receiver Check
2009 Nissan-Datsun Sentra L4-2.0L (MR20DE)SECTION Remote Keyless Entry Receiver Check
REMOTE KEYLESS ENTRY SYSTEM
Remote Keyless Entry Receiver Check
1. CHECK REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Check remote keyless entry receiver connector and ground signal with oscilloscope.
OK or NG
OK >> Remote keyless entry receiver circuit is OK.
NG >> GO TO 2.
2. CHECK REMOTE KEYLESS ENTRY RECEIVER INPUT VOLTAGE
1. Disconnect remote keyless entry receiver connector.
2. Check voltage between remote keyless entry receiver connector M15 terminal 4 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK REMOTE KEYLESS ENTRY RECEIVER POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM connector M18 (A) terminal 19 and remote keyless entry receiver connector M15 (B) terminal 4.
3. Check continuity between BCM connector (A) M18 terminal 19 and ground.
OK or NG
OK >> Replace BCM. Refer to Service and Repair.
NG >> Repair or replace the harness.
4. CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT
Check continuity between remote keyless entry receiver connector M15 terminal 1 and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT
Check continuity between BCM connector M18 (A) terminal 18 and remote keyless entry receiver connector M15 (B) terminal 1.
OK or NG
OK >> Replace BCM. Refer to Service and Repair.
NG >> Repair or replace the harness.
6. CHECK REMOTE KEYLESS ENTRY RECEIVER SIGNAL CIRCUIT
1. Check continuity between BCM connector M18 (A) terminal 20 and remote keyless entry receiver connector M15 (B) terminal 2.
2. Check continuity between BCM connector (A) M18 terminal 20 and ground.
OK or NG
OK >> Replace remote keyless entry receiver. Refer to Service and Repair.
NG >> Repair or replace harness.
RENDER: 1.0x
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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.