TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 311 of 953
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).