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Specifications Between Transfer Control Unit Terminals

WARNING: This page is about a different car, the 2006 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Transfer Control Unit Terminals
G04186343Courtesy of NISSAN MOTOR CO., U.S.A.
NOTE: Data are reference value and are measured between each terminal and ground.
TRANSFER CONTROL UNIT TERMINALS DATA SPECIFICATION

Terminal Wire color Item Condition Data (Approx.)
1 L CAN-H - -
2 P CAN-L - -
3 L K-LINE (CONSULT-II signal) - -
6 B Ground Always 0V
10 LG/B Actuator position switch 1
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 2WD and 4LO 0V
4WD shift switch: 4H Battery voltage
11 W/L 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 BR/W Actuator position switch 4 4WD shift switch: 4H and 4LO 0V
4WD shift switch: 2WD Battery voltage
14 G/W 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 R 4WD shift switch (4LO) 4WD shift switch: 4LO Battery voltage
4WD shift switch: 2WD and 4H 0V
17 G/Y Wait detection switch
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4H and 4LO 0V
4WD shift switch: 2WD Battery voltage
18 B Ground Always 0V
19 W Power supply (Memory back-up) Ignition switch: ON Battery voltage
Ignition switch: OFF Battery voltage
23 R/B 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
24 V LO switch
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 4WD shift switch: 4LO 0V
Except the above Battery voltage
25 L/W Ignition switch monitor Ignition switch: ON Battery voltage
Ignition switch: OFF 0V
27 Y/R Actuator motor power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) 0V
28 Y/W Actuator motor (+)
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • Brake pedal depressed
 When 4WD shift switch is operated (while actuator motor is operating) Battery voltage --> 0V
31 G/R Actuator motor (-) When 4WD shift switch is not operated 0V
Always 0V
32 B Ground Always 0V
35 B/W 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 L 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 W/G 4LO indicator lamp 4LO indicator lamp: ON 0V
4LO indicator lamp: OFF Battery voltage
38 W/B 4WD warning lamp 4WD warning lamp: ON 0V
4WD warning lamp: OFF Battery voltage
39 L/B 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 Y Transfer shut off relay Ignition switch: ON 0V
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) Battery voltage
42 BR Transfer shift high relay
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • 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/R Power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) 0V
45 Y/R Power supply Ignition switch: ON Battery voltage
Ignition switch: OFF (5 seconds after ignition switch is turned OFF) 0V
47 Y/L Transfer shift high relay monitor
  • Vehicle stopped
  • Engine running
  • A/T selector lever "N" position
  • 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 G/B 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 R 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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