Table 2-7. Engine Troubleshooting (CONT).
TEST OR INSPECTION
4. THE ENGINE RUNS UNTIL FAULT SHUTDOWN (CONT).
The HI ENG TEMP lamp comes on and the engine shuts down.
a. Check the engine coolant level, repair any coolant leaks and refill as necessary. Then
reset the ECM by pushing the Run-Stop-Remote switch to Stop, push Reset switch to Reset
and restart engine.
b. If the set shuts down due to high engine temperature, let engine cool, start the engine
and observe coolant temperature as the system heats up. If shutdown occurs before the
coolant reaches 200 F (93 C), replace the high coolant temperature sensor (Para 8-36). If
coolant temperature exceeds 200 F (93 C), clean and service the entire cooling system as
required to restore full cooling capacity (Para 8-25).
c. Check low coolant level switch S7 on radiator which is wired in series with High Engine
Temperature (HET) switch S2. Wire S7 from engine TB26 goes to S7. The radiator
coolant serves as the contact with the switch.