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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1694 (Transfer Case) >> ATX14B >> Trouble Diagnosis >> Transfer Control Unit Input/Output Signal Reference Values >> Transfer Control Unit Inspection Table >> Specifications Between Transfer Control Unit Terminals
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Specifications Between Transfer Control Unit Terminals

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Transfer Control Unit Connector Terminals Layout
G04174440Courtesy of NISSAN MOTOR CO., U.S.A.
NOTE: Data are reference value and are measured between each terminal and ground.
TRANSFER CONTROL UNIT TERMINALS VOLTAGE SPECIFICATION

Terminal Wire color Item Condition Data (Approx.)
1 GR 2-4WD shift solenoid valve
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 2WD 0V
4WD shift switch: AUTO, 4H or 4LO Battery voltage
2 V 4WD shift indicator lamp (2WD indicator lamp) 2WD indicator lamp: OFF Battery voltage
2WD indicator lamp: ON 0V
3 B Ground Always 0V
4 SB Transfer shift high relay
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4H to 4LO ("Wait" function is operating.) Battery voltage
Except the above 0V
5 GR 4WD warning lamp 4WD warning lamp: ON 0V
4WD warning lamp: OFF Battery voltage
6 B Ground Always 0V
7 L CAN-H - -
8 P CAN-L - -
9 G 4WD shift switch (2WD) Ignition switch: ON 4WD shift switch: 2WD Battery voltage
4WD shift switch: AUTO, 4H or 4LO 0V
10 P Transfer dropping resistor
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: AUTO 4 - 14V
4WD shift switch: 2WD, 4H or 4LO Less than 1V
11 BR 4WD shift indicator lamp (Lock indicator lamp) Lock indicator lamp of 4WD shift indicator lamp: OFF Battery voltage
Lock indicator lamp of 4WD shift indicator lamp: ON 0V
12 O 4LO indicator lamp 4LO indicator lamp: OFF Battery voltage
4LO indicator lamp: ON 0V
13 G Transfer shift low relay
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4LO to 4H ("Wait" function is operating.) Battery voltage
Except the above 0V
14 V Transfer motor relay
  • Accelerator pedal depressed
  • Vehicle stopped
  • Engine running
  • Brake pedal depressed
 4WD shift switch: 2WD Battery voltage
4WD shift switch: AUTO or 4LO (A/T selector lever "P" or "N" position) Battery voltage (0V for approx. 2 sec. after shifting to "P" and "N".)
4WD shift switch: AUTO or 4LO (Except for A/T selector lever "P" or "N" position) 0V
4WD shift switch: 4H (A/T selector lever "P" position) Battery voltage (0V for approx. 2 sec. after shifting to "P".)
4WD shift switch: 4H (Except for A/T selector lever "P" position) 0V
15 LG ATP warning lamp ATP indicator lamp: ON 0V
ATP indicator lamp: OFF Battery voltage
16 Y Power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) 0V
18 O 4WD shift switch (4H) Ignition switch: ON 4WD shift switch: 4H Battery voltage
4WD shift switch: 2WD, AUTO or 4LO 0V
19 R Clutch pressure solenoid valve
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: AUTO 1.5 - 3V
4WD shift switch: 2WD, 4H or 4LO Less than 1V
21 B 4WD shift indicator lamp (AUTO indicator lamp) AUTO indicator lamp of 4WD shift indicator lamp: OFF Battery voltage
AUTO indicator lamp of 4WD shift indicator lamp: ON 0V
22 GR Power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) 0V
23 W 4WD shift switch (4LO) Ignition switch: ON 4WD shift switch: 4LO Battery voltage
4WD shift switch: 2WD, AUTO or 4H 0V
24 LG 4WD shift switch (AUTO) Ignition switch: ON 4WD shift switch: AUTO Battery voltage
4WD shift switch: 2WD, 4H or 4LO 0V
25 Y Neutral-4LO switch
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 2WD, AUTO or 4H Battery voltage
4WD shift switch: 4H to 4LO (While actuator motor is operating.) Battery voltage --> 0V
4WD shift switch: 4LO to 4H (While actuator motor is operating.) 0V --> Battery voltage
4WD shift switch: 4LO 0V
27 W Actuator position switch 2 (High)
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4H, AUTO or 2WD 0V
4WD shift switch: 4LO Battery voltage
28 P Sensor ground Always 0V
29 W/G Ignition switch monitor Ignition switch: ON Battery voltage
Ignition switch: OFF 0V
30 V Shut off relay Ignition switch: ON 0V
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) Battery voltage
31 G Transfer fluid temperature sensor Ignition switch: ON Transfer fluid temperature approx. 20°C (68°F) 1.1V
Transfer fluid temperature approx. 80°C (176°F) 0.3V
33 GR Transfer shift high relay monitor
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4H to 4LO ("Wait" function is operating.) Battery voltage
Except the above 0V
34 BR Clutch pressure switch
  • Vehicle stopped
  • Engine running
  • A/T selector lever "D" position
 4WD shift switch: AUTO or 4H ("Wait" function is not operating.) 0V
  • Vehicle stopped
  • Engine running
 4WD shift switch: 2WD ("Wait" function is not operating.) Battery voltage
35 L Line pressure switch
  • Ignition switch: ON
  • A/T selector lever "D" position
  • 4WD shift switch: AUTO
 0V
  • After the vehicle has been left at room temperature for 5 minutes and more with ignition switch in "OFF" position.
  • Ignition switch: ON
  • A/T selector lever: "P" or "N" position
  • 4WD shift switch: other than AUTO
 Battery voltage
40 R ATP switch
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N"
  • Brake pedal depressed
 4WD shift switch: 4H to 4LO or 4LO to 4H (While actuator motor is operating.) 0V
Except the above Battery voltage
41 SB Transfer motor relay monitor
  • Accelerator pedal depressed
  • Vehicle stopped
  • Engine running
  • Brake pedal depressed
 4WD shift switch: 2WD 0V
4WD shift switch: AUTO or 4LO (A/T selector lever "P" or "N" position) 0V (Battery voltage for approx. 2 sec. after shifting to "P" and "N".)
4WD shift switch: AUTO or 4LO (Except for A/T selector lever "P" or "N" position) Battery voltage
4WD shift switch: 4H (A/T selector lever "P" position) 0V (Battery voltage for approx. 2 sec. after shifting to "P".)
4WD shift switch: 4H (Except for A/T selector lever "P" position) Battery voltage
42 Y Transfer shift low relay monitor
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4LO to 4H ("Wait" function is operating.) Battery voltage
Except the above 0V
43 O Wait detection switch
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 2WD, AUTO or 4H Battery voltage
4WD shift switch: 4H to 4LO (While actuator motor is operating.) Battery voltage -> 0V
4WD shift switch: 4LO to 4H (While actuator motor is operating.) 0V -> Battery voltage
4WD shift switch: 4LO 0V
44 LG Actuator position switch 1 (Low)
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4LO 0V
4WD shift switch: 2WD, AUTO or 4H Battery voltage
45 B Ground Always 0V
47 R Power supply (Memory back-up) Ignition switch: ON Battery voltage
Ignition switch: OFF Battery voltage
CAUTION: When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
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