Inspection Between TCM and Differential Lock Control Unit Circuit

1. Turn ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check following terminals and connectors for damage, bend and loose connection (connector side and harness side).
   • Harness connector F14
   • Harness connector E5
   • Harness connector E34
   • Harness connector B40

OK or NG 

OK: GO TO 2.

NG: Repair terminal or connector.

1. Disconnect A/T assembly connector and harness connector F14.
2. Check continuity between A/T assembly harness connector (A) and harness connector (B).
   Fig 1: Checking Continuity Between A/T Assembly Harness Connector And Harness Connector

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

   A		B		Continuity
   Connector	Terminal	Connector	Terminal
   F9	3	F14	5	Yes
   	8		15	Yes

OK or NG 

OK: GO TO 3.

NG: Repair harness.

1. Disconnect harness connector E34.
2. Check continuity between harness connector (A) and harness connector (B).
   Fig 2: Checking Continuity Between Harness Connector (A) And Harness Connector (B)

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

   A		B		Continuity
   Connector	Terminal	Connector	Terminal
   E5	5	E34	24	Yes
   	15		23	Yes

OK or NG 

OK: GO TO 4.

NG: Repair harness.

1. Disconnect differential lock control unit connector.
2. Check continuity between harness connector (A) and differential lock control unit harness connector (B).
   Fig 3: Checking Continuity Between Harness Connector (A) And Differential Lock Control Unit Harness Connector (B)

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

   A		B		Continuity
   Connector	Terminal	Connector	Terminal
   B40	24	B77	5	Yes
   	23		4	Yes

OK or NG 

OK: Connect all the connectors and diagnose again. Refer to "TROUBLE DIAGNOSES WORK FLOW ".

NG: Repair harness.