Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to "CONSULT FUNCTION (ALL MODE AWD/4WD) ".

Do the self-diagnostic results indicate CAN communication?

YES: Perform trouble diagnosis for CAN communication line. Refer to "DTC INDEX ".

NO: GO TO 2.
CHECK SYSTEM FOR 4WD SHIFT SWITCH
Perform trouble diagnosis for 4WD shift switch system. Refer to "DIAGNOSIS PROCEDURE ".

Are the inspection results normal?

YES: GO TO 3.

NO: Repair or replace damaged parts.
CHECK SYSTEM FOR TRANSMISSION RANGE SWITCH SIGNAL
Perform trouble diagnosis for transmission range switch signal system. Refer to "DIAGNOSIS PROCEDURE ".

Are the inspection results normal?

YES: GO TO 4.

NO: Repair or replace damaged parts.
CHECK SYSTEM FOR ATP SWITCH
Perform trouble diagnosis for ATP switch system. Refer to "DIAGNOSIS PROCEDURE ".

Are the inspection results normal?

YES: GO TO 5.

NO: Repair or replace damaged parts.
CHECK ATP WARNING LAMP CIRCUIT
1. Disconnect ATP switch harness connector.
2. Turn ignition switch "ON". (Do not start engine.)
3. Ground terminal 8 on ATP switch connector F71 using suitable wiring.
  Does ATP warning lamp turn on?
  
  YES: GO TO 9.
  
  NO: GO TO 6.
  
  Fig 1: Checking ATP Warning Lamp Circuit
  Courtesy of NISSAN NORTH AMERICA, INC.
4. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND COMBINATION METER
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and combination meter harness connector.
3. Check continuity between transfer control unit harness connector M166 terminal 39 and combination meter harness connector M24 terminal 21.
  Continuity should exist .
  
  Fig 2: Checking Continuity Between Transfer Control Unit Connector M166 Terminal 39 And Combination Meter Connector M24 Terminal 21
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Also check harness for short to ground and short to power.
  
  Does continuity exist?
  
  YES: GO TO 7.
  
  NO: Repair or replace damaged parts.
CHECK HARNESS BETWEEN COMBINATION METER AND ATP SWITCH
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect ATP switch harness connector.
3. Check continuity between combination meter harness connector M24 terminal 1 and ATP switch harness connector F71 terminal 8.
  Continuity should exist .
  
  Fig 3: Checking Continuity Between Combination Meter Connector M24 Terminal 1 And ATP Switch Connector F71 Terminal 8
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Also check harness for short to ground and short to power.
  
  Does continuity exist?
  
  YES: GO TO 8.
  
  NO: Repair or replace damaged parts.
SYMPTOM CHECK
Check again.

Does the symptom still occur?

YES: GO TO 9.

NO: Inspection End.
CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to "REFERENCE VALUE ".

Are the inspection results normal?

YES: GO TO 10.

NO: Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
CHECK TRANSFER INNER PARTS
1. Disassemble transfer assembly. Refer to "DISASSEMBLY AND ASSEMBLY ".
2. Check transfer inner parts.
  Are the inspection results normal?
  
  YES: Inspection End.
  
  NO: Repair or replace damaged parts.