Check Remote Keyless Entry Receiver

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL

Turn ignition switch OFF.

Check remote keyless entry receiver connector M78 terminal 2 (L) and ground signal with oscilloscope.

TERMINALS VOLTAGE REFERENCE

Connector	Terminal (Wire color)		Condition of keyfob	Voltage (Reference value)
Connector	(+)	(-)	Condition of keyfob	Voltage (Reference value)
M78	2(L)	Ground	No function	Courtesy of NISSAN MOTOR CO., U.S.A.
M78	2(L)	Ground	Any button is pressed	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 1: Identifying Signal Between Remote Keyless Entry Receiver Connector M78 Terminal 2 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Remote keyless entry receiver circuit is OK.

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 (Y) and ground.
  4 (Y) - Ground: Approx. 4.5V
  
  Fig 2: Identifying Voltage Between Remote Keyless Entry Receiver Connector M78 Terminal 4 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 4.

NG: GO TO 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 (Y) and BCM connector M1 terminal 19 (Y).
  4 (Y) - 19 (Y): Continuity should exist .
3. Check continuity between remote keyless entry receiver connector M78 terminal 4 (Y) and ground.
  4 (Y) - Ground: Continuity should not exist .
  
  Fig 3: Identifying Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 4 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Check harness connection.
- If it is OK, replace BCM.
- If it is NG, repair or replace malfunction part.
NG: Repair or replace the harness.
CHECK REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT
1. Check continuity between remote keyless entry receiver connector M78 terminal 1 (B) and ground.
  1 (B) - Ground: Continuity should exist .
OK or NG

OK: GO TO 6.

NG: GO TO 5.

Fig 4: Identifying 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
1. Check continuity between remote keyless entry receiver connector M78 terminal 1 (B) and BCM connector M1 terminal 18 (B)
  1 (B) - 18 (B): Continuity should exist .
  
  Fig 5: Identifying Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 1 And BCM Connector M1 Terminal 18
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Check harness connection.
- If it is OK, replace BCM.
- If it is NG, repair or replace malfunction part.
NG: Repair or replace the harness.
CHECK REMOTE KEYLESS ENTRY RECEIVER SIGNAL CIRCUIT
1. Check continuity between remote keyless entry receiver connector M78 terminal 2 (L) and BCM connector M1 terminal 20 (L).
  2 (L) - 20 (L): Continuity should exist .
2. Check continuity between remote keyless entry receiver connector M78 terminal 2 (L) and ground.
  2 (L) - Ground: Continuity should not exist .
OK or NG

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

Fig 6: Identifying Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.