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WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) DISPLAYS MAIN       CODE 24 SUB CODE 12 OR 23 (PRIOR TO SERIAL NUMBER 6510032369 WITH       TRANSMISSION ADAPTER CABLE ASSEMBLY)
WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) DISPLAYS MAIN       CODE 24 SUB CODE 12 OR 23 (PRIOR TO SERIAL NUMBER 6510032369 WITH       TRANSMISSION ADAPTER CABLE ASSEMBLY) (CONT) - TM-9-2320-366-34-1_255

TM-9-2320-366-34-1 M1078 Series 2 1/2-Ton 4x4 Light Medium Tactical Vehicles (LMTV) Manual
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Change 1          2-131 TM 9-2320-366-34-1 CONTINUITY TEST NOTE 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. Wear appropriate eye protection when working under vehicle due to the possibility of falling debris.  Failure to comply may result in injury to personnel. 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. Inspect connector pins/sockets for damage, corrosion, and serviceability.  Check that connector pins are not pushed back and are capable of making good contact.   (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         connector from adaptor cable 31-pin         connector.   (6)  Set multimeter to ohms.   (7)  Connect positive (+) probe of multimeter         to connector P119-a.   (8)  Connect negative (-) probe of multimeter         to external wiring harness 31-pin connector         pin N 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-a. (11)  Connect negative (-) probe of multimeter         to all other pins in connector P119 and         note reading on multimeter. Ensure exhaust system is cool before performing troubleshooting. Failure to comply may result in injury to personnel. CONTINUITY TEST (Cont) (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).







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