TM-9-2320-365-34-1 LMTV Direct Maintenance Manual M1078 Series - Volume 1 Download
Page 175 of 1334
Change 1 2-89 TM 9-2320-365-34-1 WARNING CAUTION Loose or dirty connectors may cause intermittent loss of power to transmission ECU and diagnostic codes to be logged. Ensure that all connectors are clean and tight before performing troubleshooting. Failure to comply may result in incorrect test results. Use care when testing electrical connectors. Do not damage connector pins or sockets with multimeter probes. Failure to comply may result in damage to equipment. NOTE Inspect connector pins/sockets for damage, corrosion, and serviceability. Check that connector pins are not pushed back and are capable of making good contact. CONTINUITY TEST (1) Remove two screws and washers from front grille. (2) Remove screw and washer from front grille. (3) Remove front grille from cab. (4) Disconnect connector P119 from connector J119. (5) Disconnect external wiring harness 31-pin from adapter cable 31-pin connector. (6) Set multimeter to ohms. (7) Connect positive (+) probe of multimeter to P119-p. (8) Connect negative (-) probe of multimeter to external wiring harness 31-pin connector pin V and note reading on multimeter. (9) If continuity is not present, replace transmission external wiring harness (para 6-7). (10) Connect positive (+) probe of multimeter to connector P119-p. Wear appropriate eye protection when working under vehicle due to the possibility of falling debris. Failure to comply may result in injury to personnel. Ensure exhaust system is cool before performing troubleshooting. Failure to comply may result in injury to personnel. CONTINUITY TEST (Cont) (11) Connect negative (-) probe of multimeter to all other pins in connector P119 and note reading on multimeter. (12) Connect negative (-) probe of multimeter to ground and note reading on multimeter. (13) If continuity is present, transmission external wiring harness is shorted; replace transmission external wiring harness (para 6-7).