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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 1868 (Transfer Case) >> Trouble Diagnosis >> Transfer Control Unit Input/Output Signal Reference Values >> Specifications Between Transfer Control Unit Terminals >> Transfer Control Unit Terminal Connector Layout
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Transfer Control Unit Terminal Connector Layout

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.
Fig 1: Identifying Transfer Control Unit Terminal Connector Layout
G04204185Courtesy of NISSAN MOTOR CO., U.S.A.
NOTE: Data are reference value and are measured between each terminal and ground.
TRANSFER CONTROL UNIT TERMINALS REFERENCE

Terminal Wire color Item Condition Data (Approx.)
1 L CAN-H - -
2 P CAN-L - -
3 SB K-LINE (CONSULT-II signal) - -
6 B Ground Always 0V
10 LG Actuator position switch 1
  • 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: 2WD and 4LO 0V
4WD shift switch: 4H Battery voltage
11 W Actuator position switch 2 4WD shift switch: 4LO 0V
4WD shift switch: 2WD and 4H Battery voltage
12 BR Actuator position switch 3 4WD shift switch: 2WD and 4H 0V
4WD shift switch: 4LO Battery voltage
13 L Actuator position switch 4 4WD shift switch: 4H and 4LO 0V
4WD shift switch: 2WD Battery voltage
14 G 4WD shift switch (2WD) Ignition switch: ON 4WD shift switch: 2WD Battery voltage
4WD shift switch: 4H and 4LO 0V
15 O 4WD shift switch (4H) 4WD shift switch: 4H Battery voltage
4WD shift switch: 2WD and 4LO 0V
16 W 4WD shift switch (4LO) 4WD shift switch: 4LO Battery voltage
4WD shift switch: 2WD and 4H 0V
17 O Wait detection switch
  • 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 0V
4WD shift switch: 2WD Battery voltage
18 B Ground Always 0V
19 R Power supply (Memory back-up) Always Battery voltage
23 R ATP switch (A/T models)
  • Vehicle stopped
  • Engine running
  • For A/T models, A/T selector lever "N" position with brake pedal depressed.
 4WD shift switch: 4H to 4LO or 4LO to 4H (While actuator motor is operating.) 0V
Except the above Battery voltage
24 Y 4LO switch
  • 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: 4LO 0V
Except the above Battery voltage
25 W/G Ignition switch monitor Ignition switch: ON Battery voltage
Ignition switch: OFF 0V
27 L Actuator motor power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned 0V
28 SB Actuator motor (+)
  • 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.
 When 4WD shift switch is operated (while actuator motor is operating) Battery voltage --> 0V
When 4WD shift switch is not operated 0V
31 G Actuator motor (-) Always 0V
32 B Ground Always 0V
33 P Park/Neutral position switch (M/T models) Ignition switch: ON M/T shift lever neutral position 0V
Except the above Battery voltage
35 V 4WD shift indicator lamp (Rear indicator) Engine running Rear indicator of 4WD shift indicator lamp: ON 0V
Rear indicator of 4WD shift indicator lamp: OFF Battery voltage
36 BR 4WD shift indicator lamp
(Front and center indicator)		 Front and center indicator of 4WD shift indicator lamp: ON 0V
Front and center indicator of 4WD shift indicator lamp: OFF Battery voltage
37 O 4LO indicator lamp 4LO indicator lamp: ON 0V
4LO indicator lamp: OFF Battery voltage
38 GR 4WD warning lamp 4WD warning lamp: ON 0V
4WD warning lamp: OFF Battery voltage
39 LG ATP warning lamp
  • Vehicle stopped
  • Engine running
  • A/T selector lever "P" position
  • Brake pedal depressed
 4WD shift switch: 4H to 4LO or 4LO to 4H (While actuator motor is operating.) Battery voltage
Except the above 0V
40 V Transfer shut off relay Ignition switch: ON 0V
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) Battery voltage
42 LG Transfer shift high relay
  • 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: 2WD to 4H or 4H to 4LO or 2WD to 4LO 0V
Except the above Battery voltage
44 Y Power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) 0V
45 GR Power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) 0V
47 O Transfer shift high relay monitor
  • 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: 2WD to 4H or 4H to 4LO or 2WD to 4LO (while actuator motor is operating) Battery voltage --> 0V
Except the above 0V
48 R Transfer shift low relay monitor 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD (while actuator motor is operating) Battery voltage --> 0V
Except the above 0V
50 Y Transfer shift low relay 4WD shift switch: 4LO to 4H or 4H to 2WD or 4LO to 2WD 0V
Except the above 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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