Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WAIT DETECTION SWITCH SIGNAL

With CONSULT-II

Start engine.
Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.
Read out the value of "WAIT DETCT SW".

4WD SHIFT SWITCH DISPLAY VALUE

Condition		Display value
Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.	4WD shift switch: 4H and 4LO	ON
	4WD shift switch: 2WD	OFF

Fig 1: CONSULT II DATA MONITOR Screen

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

Without CONSULT-II

Start engine.
Check voltage between transfer control unit harness connector terminal and ground.

TRANSFER CONTROL UNIT CONNECTOR TERMINAL AND GROUND VOLTAGE

Connector	Terminal	Condition		Voltage (Approx.)
M152	17-Ground	Vehicle stopped Engine running For A/T models, A/T selector lever "N" position with brake pedal depressed. For M/T models, M/T shift lever neutral position with clutch and brake pedal depressed.	4WD shift switch: 4H and 4LO	OV
M152	17-Ground		4WD shift switch: 2WD	Battery voltage

Fig 2: Identifying Voltage Between Transfer Control Unit Connector Terminal And Ground

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

OK or NG

OK: GO TO 5.

NG: GO TO 2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND WAIT DETECTION SWITCH
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the wait detection switch harness connector.
3. Check continuity between transfer control unit harness connector M152 terminal 17 and wait detection switch harness connector F59 terminal 10.
  Continuity should exist .
  
  Also check harness for short to ground and short to power.
OK or NG

OK: GO TO 3.

NG: Repair or replace damaged parts.

Fig 3: Identifying Continuity Between Transfer Control Unit Connector And Wait Detection Switch Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Check continuity between wait detection switch harness connector F59 terminal 11 and ground.
Continuity should exist .

Also check harness for short to power.

OK or NG

OK: GO TO 4.

NG: Repair open circuit or short to power in harness or connectors.

Fig 4: Identifying Continuity Between Wait Detection Switch Harness Connector F59 Terminal 11 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK WAIT DETECTION SWITCH

Turn ignition switch "OFF". (Stay for at least 5 seconds.)
Disconnect wait detection switch harness connector.
Remove wait detection switch. Refer to "LOCATION OF ELECTRICAL PARTS ".
Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11.

WAIT DETECTION SWITCH CONTINUITY

Terminal	Condition	Continuity
10 - 11	Push wait detection switch	Yes
10 - 11	Release wait detection switch	No

OK or NG

OK: GO TO 5.

NG: Replace wait detection switch. Refer to "LOCATION OF ELECTRICAL PARTS ".

Fig 5: Identifying Continuity Between Wait Detection Switch Terminals 10 And 11

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

CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to "TRANSFER CONTROL UNIT INPUT/OUTPUT SIGNAL REFERENCE VALUES ".

OK or NG

OK: GO TO 6.

NG: 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 DTC
Perform the self-diagnosis, after driving a vehicle for a while.

OK or NG

OK: Inspection End.

NG: Replace transfer control unit. Refer to "REMOVAL AND INSTALLATION ".