4-45. THROTTLE POSITION (TP) SENSOR MAINTENANCE (4L80-E)
This task covers:
M997A2, M1025A2, M1035A2, M1043A2,
M1045A2, M1097A2, M1123
General mechanics tool kit:
automotive (Appendix B, Item 1)
Multimeter (Appendix B, Item 166)
Jumper wire (Appendix B, Item 93.1)
Gauge block (Appendix B, Item 63)
Hood raised and secured (TM 9-2320-280-10).
Battery ground cables disconnected (para. 4-73).
Ensuring throttle is closed, place TP sensor (5) on throttle shaft (2) of fuel injection pump (1).
Rotate TP sensor (5) counterclockwise to align screw holes in sensor (5) with holes in injection
Install TP sensor (5) on injection pump (1) with two washers (6) and screws (7). Do not tighten
Adjust TP sensor (5) (para. 4-45c).
Disconnect engine harness connector (12) and body harness connector (11).
Install jumper wires between TP sensor connector (4) and body wiring harness connector (11).
Rotate ignition switch to RUN position (TM 9-2320-280-10).
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.
For example, 5.00 volts x 0.33 = 1.65 volts (±1% or 0.02 volt
Install 0.646 side of gauge block between injection pump throttle lever stopscrew (8) and housing
boss (9) on injection pump (1).
The Throttle Position (TP) sensor is an electrical component and
must not be soaked in any liquid cleaner or solvent or damage may
Disconnect body wiring harness connector (3) from TP sensor connector (4).
Remove two screws (7), washers (6), and TP sensor (5) from fuel injection pump (1).