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Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1434 (Body, Lock & Security System) >> Remote Keyless Entry System >> Check Remote Keyless Entry Receiver
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Check Remote Keyless Entry Receiver

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL 
    1. Turn ignition switch OFF.
    2. Check remote keyless entry receiver connector M78 terminal 2 (L) and ground signal with oscilloscope.
    Fig 1: Connector Terminals Signal Reference Chart
    G02362235Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Checking Remote Keyless Entry Receiver Connector M78 Terminal 2 (L) And Ground Signal With Oscilloscope
    G02362236Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Remote keyless entry receiver circuit is OK.
    2. 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 M78 terminal 4 (R) and ground.
      1. 4 (Y) - Ground : Approx. 4.5V 
    Fig 3: Checking Voltage Between Remote Keyless Entry Receiver Connector M78 Terminal 4 (R) And Ground
    G02362237Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : GO TO  4.
    2. NG : GO TO 3.
  3. CHECK REMOTE KEYLESS ENTRY RECEIVER POWER SUPPLY CIRCUIT 
    1. Disconnect BCM connector.
    2. Check continuity between remote keyless entry receiver connector M78 terminal 4 (R) and BCM connector M1 terminal 19 (R).
      1. 4 (R) - 19 (R) : Continuity should exist. 
    3. Check continuity between remote keyless entry receiver connector M78 terminal 4 (R) and ground.
      1. 4 (R) - Ground : Continuity should not exist. 
    Fig 4: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 4 (R) And BCM Connector M1 Terminal 19 (R)
    G02362238Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Check harness connection.
      • If it is OK, replace BCM.
      • If it is NG, repair or replace malfunction part.
    2. NG : Repair or replace the harness.
  4. CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT 
    1. Check continuity between remote keyless entry receiver connector M78 terminal 1 (B) and ground.
      1. 1 (B) - Ground : Continuity should exist. 
    Fig 5: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 1 (B) And Ground
    G02362239Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : GO TO  6.
    2. NG : GO TO 5.
  5. CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT 
    1. Check continuity between remote keyless entry receiver connector M78 terminal 1 (B) and BCM connector M1 terminal 18 (B)
      1. 1 (B) - 18 (B) : Continuity should exist. 

    OK or NG 

    1. OK : Check harness connection.
      • If it is OK, replace BCM.
      • If it is NG, repair or replace malfunction part.
    2. NG : Repair or replace the harness.
    Fig 6: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 1 (B) And BCM Connector M1 Terminal 18 (B)
    G02362240Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK REMOTE KEYLESS ENTRY RECEIVER SIGNAL CIRCUIT 
    1. Check continuity between remote keyless entry receiver connector M78 terminal 2 (Y) and BCM connector M1 terminal 20 (Y).
      1. 2 (Y) - 20 (Y) : Continuity should exist. 
    2. Check continuity between remote keyless entry receiver connector M78 terminal 2 (Y) and ground.
      1. 2 (Y) - Ground : Continuity should not exist. 
    Fig 7: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 2 (Y) And BCM Connector M1 Terminal 20 (Y)
    G02362241Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Check harness connection.
      • If it is OK, replace remote keyless entry receiver.
      • If it is NG, repair or replace malfunction part.
    2. NG : Repair or replace harness.
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