Check Steering Lock Unit

1. Turn ignition knob LOCK position.
2. Disconnect steering lock unit connector.
3. Check voltage between steering lock unit connector M26 terminal 1 (L/R) and ground.

   1 (L/R) - Ground : Battery voltage 

OK or NG 

OK : GO TO 2.

NG : Repair or replace steering lock unit power supply circuit.

Fig 1: Identifying Voltage Between Steering Lock Unit Connector M26 Terminal 1 (L/R) And Ground

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

Check continuity between steering lock unit connector M26 terminal 4 (Y/B) and ground.

4 (Y/B) - Ground : Continuity should exist. 

Fig 2: Identifying Continuity Between Steering Lock Unit Connector M26 Terminal 4 (Y/B) And Ground

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

OK or NG 

OK : GO TO 3.

NG : GO TO  4.

1. Connect steering lock unit connector.
2. Check voltage between Intelligent Key unit connector M34 terminal 1 (R/W) and ground.

   1 (R/W) - Ground : Approx. 5V 

   Fig 3: Identifying Voltage Between Intelligent Key Unit Connector M34 Terminal 1 (R/W) And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Immediately after pushing ignition knob, use an oscilloscope to check voltage waveform between Intelligent Key unit connector M34 terminal 32 (R/B) and ground.
   CONNECTOR TERMINAL VOLTAGE REFERENCE
   
   

   Terminal (Wire color)		Condition	Signal (Reference value)
   (+)	(-)
   32 (R/B)	Ground	Immediately after ignition knob pushing.

   Fig 4: Identifying Voltage Waveform Between Intelligent Key Unit Connector M34 Terminal 32 (R/B) And Ground

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

OK or NG 

OK : GO TO 4.

NG : Replace Intelligent Key unit.

1. Disconnect Intelligent Key unit and steering lock unit connectors.
2. Check continuity between Intelligent Key unit connector M34 terminals 1, 31, 32 and steering lock unit connector M26 terminals 2, 3, 4.

   1 (R/W) - 2 (R/W) : Continuity should exist. 

   31 (Y/B) - 4 (Y/B) : Continuity should exist. 

   32 (R/B) - 3 (R/B) : Continuity should exist. 

3. Check continuity between steering lock unit connector M26 terminals 2, 3, 4 and ground.

   2 (R/W) - Ground : Continuity should not exist. 

   3 (R/B) - Ground : Continuity should not exist. 

   4 (Y/B) - Ground : Continuity should not exist. 

   Fig 5: Identifying Continuity Between Steering Lock Unit Connector M26 Terminals 2, 3, 4 And Ground

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

OK or NG 

OK : Replace steering lock unit.

• After replacing steering lock unit, perform registration procedure.

NG : Repair or replace harness between steering lock unit and Intelligent Key unit.