System Description

• In AUTO mode, distribution of traction force is controlled from 2WD status (0:100) to 4WD status (50:50) according to signal from each sensor and switch.
• In accordance with fail-safe function, when system is malfunctioning, 4WD warning lamp on combination meter turns ON and 4WD control stops. For fail-safe function, Refer to Fail-safe .
• When a high load status continues for transfer assembly (transfer control actuator or transfer fluid), 4WD control temporarily becomes 4H or 2WD status, according to protection function.
  NOTE: 4WD system is not malfunctioning.

SYSTEM DIAGRAM 

Courtesy of NISSAN NORTH AMERICA, INC.

INPUT/OUTPUT SIGNAL 

It transmits/receives each signal from the following transfer control unit via CAN communication line.

4WD SHIFT SWITCH AND 4WD SHIFT INDICATOR LAMP 

4WD shift switch	4WD shift indicator lamp (in Information display)	4WD shift procedure
AUTO Courtesy of NISSAN NORTH AMERICA, INC.	Courtesy of NISSAN NORTH AMERICA, INC.	Start the engine. Turn the 4WD shift switch. NOTE: Mode can be switched between AUTO↔4H while driving straight.
4H Courtesy of NISSAN NORTH AMERICA, INC.	Courtesy of NISSAN NORTH AMERICA, INC.
Courtesy of NISSAN NORTH AMERICA, INC.NISSAN NORTH AMERICA, INC. ↓↑ Courtesy of NISSAN NORTH AMERICA, INC.NISSAN NORTH AMERICA, INC. 4WD status: 4H↔4L	Courtesy of NISSAN NORTH AMERICA, INC. (Blinking) *1 *2	Start the engine. Never drive the vehicle. Shift A/T shift selector to N position. Press and rotate 4WD shift switch while depressing brake pedal. CAUTION: 4WD mode does not switch when 4WD shift switch is operated while the vehicle is running or A/T shift selector is shifted to any position other than neutral.
4L Courtesy of NISSAN NORTH AMERICA, INC.	Courtesy of NISSAN NORTH AMERICA, INC.

*1: Blinking 2 times/1 second

*2: "4HI" and "4LO" blink alternately.

CONDITION FOR TURN ON THE WARNING LAMP 

4WD Warning Lamp 

• Turns ON when there is a malfunction in 4WD system. 4WD warning lamp indicates the vehicle is in fail-safe mode.
• Also turns ON when ignition switch is turned ON, for the purpose of lamp check. Turns OFF approximately for 1 second after the engine starts if system is normal.

  Condition	4WD warning lamp
  Lamp check	Turns ON when ignition switch is turned ON. Turns OFF approx. 1 second after the engine start.
  4WD system malfunction	ON
  Protection function is activated due to heavy load to transfer assembly. (4WD system is not malfunctioning.)	Quick blinking: 2 times/second (Blinking in approx. 1 minute and then turning OFF)
  Large difference in diameter of front/rear tires	Slow blinking: 1 time/2 seconds (Continuing to blink until turning ignition switch OFF)
  Other than above (system normal)	OFF

ATP Warning Lamp 

When the A/T shift selector is in P position, the vehicle may move if the transfer case in neutral. ATP warning lamp is turned on to indicate this condition to the driver.

CONDITION FOR OPERATE WARNING BUZZER 

For preventing an incorrect operation during 4H↔4L switching, warning buzzer sounds from inside of transfer control unit and warns the driver, when certain conditions are satisfied.