Remote Keyless Entry Receiver Check

WARNING: This page is about a different car, the 2008 Nissan Maxima. 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 signal with an oscilloscope.

REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL

Terminals			Keyfob condition	Signal (Reference value)
(+)		(-)
Remote keyless entry receiver connector	Terminal	(-)
M78	2	Ground	No function	Courtesy of NISSAN MOTOR CO., U.S.A.
M78	2	Ground	Any button is pressed	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 1: Checking Remote Keyless Entry Receiver Signals

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

OK or NG

OK: GO TO 2.

NG: GO TO 5.

REMOTE KEYLESS ENTRY RECEIVER VOLTAGE CIRCUIT INSPECTION

Check voltage between remote keyless entry receiver connector M78 terminal 3 and ground using an oscilloscope.

REMOTE KEYLESS ENTRY RECEIVER VOLTAGE CIRCUIT INSPECTION

Terminals			Signal (Reference value)
(+)		(-)
Remote keyless entry receiver connector	Terminal	(-)
M78	3	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Voltage Between Remote Keyless Entry Receiver Connector M78 Terminal 3 And Ground

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

OK or NG

OK: GO TO 3.

NG: GO TO 5.

REMOTE KEYLESS ENTRY RECEIVER 5-VOLT CIRCUIT INSPECTION
Check voltage between remote keyless entry receiver connector M78 terminal 4 and ground.

4 - Ground: 5 volt.

Fig 3: Checking 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 5.
REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT INSPECTION
Check continuity between remote keyless entry receiver connector M78 terminal 1 and ground.

1 - Ground: Continuity should exist.

Fig 4: Checking Continuity Between Remote Keyless Entry Receiver Connector M78 Terminal 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Replace remote keyless entry receiver. Refer to "REMOVAL AND INSTALLATION OF REMOTE KEYLESS ENTRY (RKE) RECEIVER ".

NG: GO TO 5.
HARNESS INSPECTION BETWEEN INTELLIGENT KEY UNIT AND RKE RECEIVER
1. Disconnect remote keyless entry receiver and Intelligent Key unit connectors.
2. Check continuity between Intelligent Key unit connector (A) M52 terminals 8, 9, 21, 30 and remote keyless entry receiver connector (B) M78 terminals 1, 2, 3, 4.
  1 - 8: Continuity should exist.
  
  2 - 9: Continuity should exist.
  
  3 - 21: Continuity should exist.
  
  4 - 30: Continuity should exist.
3. Check continuity between remote keyless entry receiver connector (B) M78 terminals 1, 2, 3, 4 and ground.
  1 - Ground: Continuity should not exist.
  
  2 - Ground: Continuity should not exist.
  
  3 - Ground: Continuity should not exist.
  
  4 - Ground: Continuity should not exist.
Fig 5: Checking Continuity Between Remote Keyless Entry Receiver Connector (B) M78 Terminals 1 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Remote keyless entry receiver circuits are OK.

NG: Repair or replace the harness between the remote keyless entry receiver and Intelligent Key unit.