4-45. THROTTLE POSITION (TP) SENSOR MAINTENANCE (4L80-E)
This task covers:
a. Removal
c. Adjustment
b. Installation
a. Removal
INITIAL SETUP:
Applicable Models
M997A2, M1025A2, M1035A2, M1043A2,
M1045A2, M1097A2, M1123
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Test Equipment
Multimeter (Appendix B, Item 166)
Jumper wire (Appendix B, Item 93.1)
Gauge block (Appendix B, Item 63)
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
Equipment Condition
• Hood raised and secured (TM 9-2320-280-10).
• Battery ground cables disconnected (para. 4-73).
b. Installation
1.
Ensuring throttle is closed, place TP sensor (5) on throttle shaft (2) of fuel injection pump (1).
2.
Rotate TP sensor (5) counterclockwise to align screw holes in sensor (5) with holes in injection
pump (1).
3.
Install TP sensor (5) on injection pump (1) with two washers (6) and screws (7). Do not tighten
screws (7).
4.
Adjust TP sensor (5) (para. 4-45c).
c. Adjustment
1.
Disconnect engine harness connector (12) and body harness connector (11).
2.
Install jumper wires between TP sensor connector (4) and body wiring harness connector (11).
3.
Rotate ignition switch to RUN position (TM 9-2320-280-10).
4.
Using a digital multimeter, measure voltage between terminals A and C of TP sensor
connector (4). This voltage should be between 4.5 - 5.8 volts. Multiply by 0.33 to obtain the desired
TP sensor voltage, and use this figure to adjust TP sensor.
NOTE
For example, 5.00 volts x 0.33 = 1.65 volts (±1% or 0.02 volt
tolerance).
5.
Install 0.646 side of gauge block between injection pump throttle lever stopscrew (8) and housing
boss (9) on injection pump (1).
TM 9-2320-280-20-2
4-72
Change 2
CAUTION
The Throttle Position (TP) sensor is an electrical component and
must not be soaked in any liquid cleaner or solvent or damage may
result.
1.
Disconnect body wiring harness connector (3) from TP sensor connector (4).
2.
Remove two screws (7), washers (6), and TP sensor (5) from fuel injection pump (1).
