Check Select Unlock Relay

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 PASSENGER SIDE SELECT UNLOCK RELAY INPUT SIGNAL

Turn ignition switch OFF.
Check voltage between Intelligent Key unit harness connector and ground.

TERMINALS VOLTAGE REFERENCE

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
M75	40 (R/G)	Ground	Press door request switch (passenger side) once	0
M75	40 (R/G)	Ground	Other than above	Battery voltage

Fig 1: Identifying Voltage Between Intelligent Key Unit Harness Connector And Ground

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

OK or NG

OK: Passenger side select unlock relay circuit is OK.
NG: GO TO 2.

CHECK PASSENGER SIDE SELECT UNLOCK RELAY POWER SUPPLY CIRCUIT
1. Disconnect passenger side select unlock relay connector.
2. Check voltage between passenger side select unlock harness connector E15 terminal 2 and ground.
2 (R/W) - Ground : Battery voltage.

Fig 2: Identifying Voltage Between Passenger Side Select Unlock Harness Connector E15 Terminal 2 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 3.
- NG: Repair or replace passenger side select unlock relay power circuit.

CHECK PASSENGER SIDE SELECT UNLOCK RELAY

Turn ignition switch OFF.
Disconnect passenger side select unlock relay connector.
Check continuity between passenger side select unlock relay terminals 3 and 4.

TERMINALS CONTINUITY REFERENCE

Connector	Terminals		Condition	Continuity
E15	3	4	12V direct current supply between terminals 1 and 2	No
E15	3	4	Other than above	Yes

Fig 3: Identifying Continuity Between Passenger Side Select Unlock Relay Terminals 3 And 4

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

OK or NG

OK: GO TO 4
NG: Replace passenger side select unlock relay.

CHECK PASSENGER SIDE SELECT UNLOCK RELAY CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit harness connector M75 terminal 40 and passenger side select unlock relay harness connector E15 terminal 1.
  40 (R/G) - 1 (L/Y) : Continuity should exist.
3. Check continuity between Intelligent Key unit harness connector M75 terminal 40 and ground.
40 (R/G) - Ground : Continuity should not exist.

Fig 4: Identifying Continuity Between Intelligent Key Unit Harness Connector M75 Terminal 40 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: Check condition of harness and connector.
- NG: Repair or replace harness between Intelligent Key unit and passenger side select unlock relay.