Check Remote Keyless Entry Receiver

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Check remote keyless entry receiver connector M78 terminal 2 and ground signal with oscilloscope.
  
  Fig 1: Remote Keyless Entry Receiver Connector M78 Terminal 2 And Ground Signal Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Remote Keyless Entry Receiver Connector M78 Terminal 2 And Ground Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Remote keyless entry receiver circuit is OK.
2. NG: GO TO 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 and ground.
  4 (Y) - Ground: Approx. 4.5V
OK or NG
1. OK: GO TO 4 .
2. NG: GO TO 3.
  
  Fig 3: Checking Voltage Between Remote Keyless Entry Receiver Connector M78 Terminal 4 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK REMOTE KEYLESS ENTRY RECEIVER POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between remote keyless entry receiver connector M78 terminal 4 and BCM connector M1 terminal 19.
  4 (R) - 19 (R): Continuity should exist.
3. Check continuity between remote keyless entry receiver connector M78 terminal 4 and ground.
  4 (R) - Ground: Continuity should not 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 4: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 4 And BCM Connector M1 Terminal 19
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT
Check continuity between remote keyless entry receiver connector M78 terminal 1 and ground.

1 (B) - Ground: Continuity should exist.

OK or NG
1. OK: GO TO 6 .
2. NG: GO TO 5.
  
  Fig 5: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT
Check continuity between remote keyless entry receiver connector M78 terminal 1 and BCM connector M1 terminal 18.

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 And BCM Connector M1 Terminal 18
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK REMOTE KEYLESS ENTRY RECEIVER SIGNAL CIRCUIT
1. Check continuity between remote keyless entry receiver connector M78 terminal 2 and BCM connector M1 terminal 20.
  2 (Y) - 20 (Y): Continuity should exist.
2. Check continuity between remote keyless entry receiver connector M78 terminal 2 and ground.
  2 (Y) - Ground: Continuity should not exist.
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.
  
  Fig 7: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 2 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.