Spicer TPCS (Tire Pressure Control System) Service Manual - Manual (Page 15)

15
Speed Sensor Repair/Replacement
The first step in replacing the speed sensor is to
determine the type. Figure 6 illustrates two types of
sensors. After determining the type, follow the corre-
sponding replacement procedures.
Magnetic Sensor
Note: This procedure requires cutting the existing
vehicle speedometer wires and splicing these wires with
the second set of wires from the Speed Sensor.
This procedure only applies to the dual coil (bifilar)
sensor. Single coil sensors are a direct replacement.
1. Turn off the vehicle’s ignition and engine.
2. Locate the Speed Sensor. The Speed Sensor is
located on the output shaft bearing cover of the
transmission or transfer case.
3. Disconnect the connector on Tire Pressure Control
System harness.
4. Cut off vehicle speedometer sensor connector at
butt splice leaving 3" of wire on connector side.
5. Strip 3 /
16
" of insulation off the vehicle speedometer
connector wires.
6. Remove the locking nut for the old speed sensor
and unscrew it.
7. Thread the new Dual Output Electrical Speed
Sensor in by hand until it bottoms out and then
back it out
1 /
2
turn. Secure with locking nut.
8. Slide heat-shrink tubing provided (2" long) over
each of the new Speed Sensor wires.
9. Install and crimp butt splices connecting vehicle
speedometer wires and new Speed Sensor wires.
10. Center the Heat-Shrink tubing over the butt splice
and apply suitable, low level heat.
11. After heat application, check for adhesive flow of
each end of tubing.
12. Connect the Tire Pressure Control System wiring
connector to the new Speed Sensor.
13. Check all wiring for appropriate clearance.
14. Start the vehicle and test the Tire Pressure Control
System.
Mechanical Sensor
1. Turn off the vehicle’s ignition and engine.
2. Locate the Speed Sensor. The Speed Sensor is
located on the output shaft bearing cover of the
transmission or transfer case.
3. Disconnect the Tire Pressure Control System
wiring connector from the old Speed Sensor.
4. Unscrew the speedometer cable from the old
Speed Sensor.
5. Remove Speed Sensor.
6. Align drive tangs and thread in new speed sensor.
Torque to 12–15 lbs. ft. (16–20 N•m).
7. Connect the Tire Pressure Control System wiring
connector to the new Speed Sensor.
8. Thread the speedometer cable onto new Speed
Sensor.
9. Check all wire routing for appropriate clearance.
10. Start the vehicle and test the Tire Pressure Control
System.
Magnetic
Figure 6 Speed Sensors
Mechanical
Electrical Service
Splicing Wire
Sensor Repair/Replacement