Table 2-4. Troub leshooting

ARMY TM 5-6115-612-34 MARINE CORPS TM 6115-34/8 AIR FORCE TO 35C2-3-471-2 NAVY AG-320BO-MME-OOO 2-3. GENERAL. (cont) Table 2-4. Troubleshooting - continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 2. Connect voltmeter to P1-11(+). Release MASTER SWITCH to RUN. If voltage is less than 1.5 Vdc, replace microprocessor circuit card (paragraph 10-2b). If voltage is 1.5 Vdc or greater, connect voltmeter positive(+) to switch circuit card TB1-2. If voltage is less than 20 Vdc, replace switch card (paragraph 10-2b). If voltage is 20 Vdc or greater, check continuity. P2-20 to K2-X1 K2-A2 to E2 K2-X1 to E1 (ground) K2-A1 to J5-K Repair or replace as necessary. If continuity is present, replace relay K2 (paragraph 10-2g). 4. ENGINE OVERTEMP MALFUNCTION - PROBLEM ISOLATED TO EECM. Step 1. Inspect and check continuity of wires from J5-R and J5-S to microprocessor board P2-6 and P2-7. Repair or replace wires as necessary. Step 2. Connect EECM under test to EECM tester. Short EGT input terminals together. Move MASTER SWITCH to RUN position. Connect voltmeter to P1-8(+) and E1(-) ground terminal. If voltage is less than 1.5 Vdc, replace microprocessor circuit card (paragraph 10-2b). If voltage is 1.5 Vdc or greater, connect voltmeter positive(+) to switch circuit card Q1-C. If voltage is 19 Vdc or less, replace switch circuit card (paragraph 10-2b). 5. OVERSPEED MALFUNCTION INDICATOR - PROBLEM ISOLATED TO EECM. Step 1. Inspect and check continuity of wires from J5-G to micro- processor board P2-5 and from J5-F to microprocessor board P2-8. If no continuity, repair or replace wires as necessary. If continuity present, go to Step 2. 2-43