Judgement Self-diagnosis

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

When a malfunction is detected, the malfunction route is indicated by flickering of the 4WD warning lamp.

Fig 1: Identifying 4WD Warning Lamp Flickering Pattern For 2 And 3

FLICKERING PATTERN OR FLICKERING CONDITION

Flickering pattern or flickering condition	Items	Diagnostic item is detected when...	Check item
2	Output shaft revolution signal (from TCM)	Malfunction is detected in output shaft revolution signal that is output from TCM through CAN communication. Improper signal is input while driving.	"OUTPUT SHAFT REVOLUTION SIGNAL (TCM) "
3	Vehicle speed signal (from ABS)	Malfunction is detected in vehicle speed signal that is output from ABS actuator and electric unit (control unit) through CAN communication. Improper signal is input while driving.	"VEHICLE SPEED SENSOR (ABS) "
4	CAN communication	Malfunction has been detected from CAN communication.	"CAN COMMUNICATION LINE "
5	AD converter	AD converter system of transfer control unit is malfunctioning.	"TRANSFER CONTROL UNIT "
6	4LO switch	Improper signal from 4LO switch is input due to open or short circuit.	"4LO SWITCH "
7	Engine speed signal	Malfunction is detected in engine speed signal that is output from ECM through CAN communication. Improper signal is input while driving.	"ENGINE SPEED SIGNAL "
8	Power supply	Power supply voltage for transfer control unit is abnormally low while driving.	"POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT "
9	4WD shift switch	More than two switch inputs are simultaneously detected due to short circuit of 4WD shift switch.	"4WD SHIFT SWITCH "
10	Wait detection switch	Improper signal from wait detection switch is input due to open or short circuit.	"WAIT DETECTION SWITCH "
11	Actuator motor	Motor does not operate properly due to open or short circuit in actuator motor. Malfunction is detected in the actuator motor. (When 4WD shift switch is operated and actuator motor is not operated.) Malfunction is detected in transfer shift high relay or transfer shift low relay.	"ACTUATOR MOTOR "
12	Actuator position switch	Improper signal from actuator position switch is input due to open or short circuit. Malfunction is detected in the actuator position switch.	"ACTUATOR POSITION SWITCH "
13	Transfer control device	Malfunction is detected in transfer shut off relay 1 and transfer shut off 2. Malfunction occurs in transfer control device drive circuit.	"POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT ", "TRANSFER CONTROL DEVICE "
14	PNP switch signal	When A/T PNP switch signal is malfunction or communication error between the vehicles.	"PNP SWITCH SIGNAL "
Repeats flickering every 0.25 sec.	Data erase display	Power supply failure of memory back-up. Battery is disconnected for a long time. Battery performance is poor.	"POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT "
Repeats flickering every 2 to 5 sec.	-	Circuits that the self-diagnosis covers have no malfunction.	-
No flickering	PNP switch or 4WD shift switch	PNP switch or 4WD shift switch circuit is shorted or open.	"PNP SWITCH SIGNAL " or "4WD SHIFT SWITCH "

NOTE: If "actuator position switch" or "transfer control device" is displayed, first erase self-diagnostic results. (They may be displayed after installing transfer control unit or transfer assembly.)