TM-9-2540-207-14&P Sustainment Manual for A20 Heater for M113 2540-01-396-2826 Download
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TM 9-2540-207-14&P 6-18 6.5.24 E2 – LOW FUEL PRESSURE (Design Iteration 3 Only) NOTE:THIS IS A WARNING ONLY, THE UNIT WILL NOT FAULT. TO ELIMINATE THE WARNING, BOOST SUPPLY FUEL PRESSURE. FUEL SUPPLY PRESSURE TO THE HEATER IS BELOW 3.6 PSI CHECK/POSSIBLE CAUSE REF. REPAIR 1 CHECK THAT VEHICLE OR SOURCE FUEL PUMP IS OPERATING 2.6 RECONNECT SOURCE FUEL PUMP RESTART HEATER 2 CHECK IF VEHICLE FUEL FILTER IS PLUGGED REPLACE FUEL FILTER RESTART HEATER 3 CHECK FOR AIR BUBBLES IN THE FUEL LINE. BLEED AIR FROM FUEL LINES. 4 CHECK TO SEE IF FUEL LINE LEADING TO HEATER IS PINCHED OR OBSTRUCTED STRAIGHTEN FUEL LINES AND REMOVE OBSTRUCTIONS RESTART HEATER 5 CHECK THAT THERE IS AMPLE FUEL SUPPLY TABLE 2-1 FILL FUEL TANK WITH FUEL RESTART HEATER 6 ENSURE THAT FUEL PRESSURE SENSOR IS CONNECTED TO WIRING HARNESS RECONNECT FUEL PRESSURE SENSOR TO WIRING HARNESS PLUG P4 AND RECONNECT WIRE HARNESS PLUG P1 INTO THE LOGIC BOARD RESTART HEATER 7 CHECK WIRING HARNESS FOR DAMAGE AND CONTINUITY CHECK 3 WIRES FROM PLUG P4 TO PLUG P1: P4-PIN A TO P1-PIN17 P4-PIN B TO P1-PIN15 P4-PIN C TO P1-PIN16 CHECK FOR SHORT : P4-PIN A TO CHASSIS SHOULD BE OPEN LINE P4-PIN B TO CHASSIS SHOULD BE OPEN LINE P4-PIN C IS THE GROUND IF ANY CHECK FAILS REPLACE WIRING HARNESS RESTART HEATER 8 DEFECTIVE FUEL PRESSURE SENSOR 5.5.1 REPLACE FUEL PRESSURE SENSOR RESTART HEATER