MARINE CORPS TM 6115-12/7
4-10. GENERAL. (cont)
Organizational Troubleshooting - Continued
TEST OR INSPECTION
ENGINE OVERTEMP INDICATOR COMES ON BEFORE ENGINE START.
To prevent injury, ensure that
Disconnect connector P5 from EECM.
Disconnect battery cable
Check continuity between P5-R and P5-S.
Reading should be less than 100 ohms.
If open, go to Step 2.
If continuity indicated, measure P5-R and P5-S to good case
Reading should show infinity. If reading shows
Infinity, replace EECM (paragraph 4-64).
If resistance is
measured, go to Step 2.
Disconnect one connector from thermocouple. Perform continuity
check between thermocouple terminals.
Reading should show less
than 100 ohms.
If continuity is indicated, visually inspect for damage and
perform continuity checks on wires U145A (to P5-R) and
U146A (to P5-S).
Repair or replace wires if damaged or no
STARTER ATTEMPTS TO OPERATE BUT CHATTERS, ENGAGES BUT DOES NOT TURN, OR TURNS
BUT NO INDICATION OF IGNITION.
Move MASTER SWITCH to START position and check voltage at large
studs on starter.
If voltage is below 14 Vdc, test battery (paragraph 4-27).
Replace or recharge as necessary.
If voltage is above 14 Vdc, perform maintenance on starter