Fault 19: Engine Coolant Temp Sensor Out Of Range - Toro Reelmaster 5010-H Diagnostic Manual

Fault 19: Engine Coolant Temp Sensor Out
of Range
InfoCenter Display:
Fault Description
The engine coolant temperature sensor (also called the temperature sender) is either open or shorted. Its output
is outside the normal functional range.
Circuit Description
The engine coolant temperature sensor (temperature sender) is a submersible thermistor which sends an
analog signal of 0 to 5 Vdc to the TEC-5002.
Note:
The resistance measured within the temperature sender decreases as coolant temperature rises.
Conditions for Setting the Fault
The TEC-5002 receives the minimum or maximum reading from the engine coolant temperature sensor
(temperature sender).
Recommended Service Actions
Step 1: Verify that the fault repeats.
1. Clear the system faults from the InfoCenter. Refer to
2. Operate the machine.
Pass The fault did not repeat. Go to
Note:
If the fault does not repeat, an isolated event has occurred.
Fail The fault repeated. Go to Step 2.
Step 2: Test the temperature sender wiring.
1. Locate the temperature sender near the alternator, on the coolant thermostat housing attached to the
engine cylinder head
_____FAULT
Returning the Machine to Service (page 22)
(Figure 49).
#19_____
Sensor /
HI LO
Clearing Faults from the InfoCenter (page
73
21).
and follow the steps listed.