TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 305 of 953
4-42.1. E-PROM REPLACEMENT This task covers: a. Removal b. Installation a. Removal CAUTION Ensure that ignition switch is OFF before replacing E-PROM or disconnecting or reconnecting the Transmission Control Module (TCM). Failure to do this may cause internal damage to TCM. NOTE For proper calibration of E-PROM to transmission, ensure E-PROM is the same production year as the transmission installed in the vehicle. 1. Loosen four screws (1) and remove cover (2) and foam insulation (4) from TCM box (8). 2. Remove two screws (5) and access panel (6) from terminal box (9). 3. Remove E-PROM (10) from circuit board (7). INITIAL SETUP: Applicable Models M997A2, M1025A2, M1035A2, M1043A2, M1045A2, M1097A2, M1123 Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts RTV sealant (Appendix C, Item 38) Manual References TM 9-2320-280-24P Equipment Condition • Battery ground cables disconnected (para. 4-73). • Left rear seat compartment cover removed (para. 10-43). TM 9-2320-280-20-2 4-66.2 Change 2 1. Install E-PROM (10) on circuit board (7) by pushing it down firmly to ensure it is well seated. 2. Install access panel (6) on terminal box (9) with two screws (5). 3. Clean sealant from TCM box (8) and cover (2). 4. Apply 0.125 in. (3.175 mm) bead of RTV adhesive sealant in groove (3) on cover (2). 5. Install foam insulation (4) and cover (2) on TCM box (8) and tighten four screws (1) to 30 lb-in. (3 N•m). b. Installation