Operation / operating principle
NTC type sensor (resistance sensor, inversely variable with temperature)
Level in wiring diagram:water temperature sensor
Location:
•
Sensor: on the left cylinder, externally
•
Connector: on the sensor
Electrical characteristics:
Resistance at -20 °C (-4 °F): 15 kΩ ± 5%
Resistance at 0 °C (32 °F): 5.8 kΩ ± 5%
Resistance at 40 °C (104 °F): 1.1 kΩ ± 5%
Resistance at 60 °C (140 °F): 0.6 kΩ ± 5%
Resistance at 80 °C (176 °F): 0.3 kΩ ± 5%
Resistance at 100 °C (212 °F): 0.19 kΩ ± 5%
Pin-out:
•
PIN 1: (brown cable on cable harness side): 0-5 V signal
•
PIN 2: (blue/green cable on cable harness side): Ground connection
AXONE: PARAMETERS
Air temperature
In case of failure, a value of 20 °C (68 °F) is set.
ELECTRICAL ERRORS
engine temperature sensor 118 - circuit shorted to negative.
Error cause
•
If shorted to negative: voltage equal to zero has been detected at PIN D4 of the control unit
connector.
Troubleshooting
•
If shorted to negative, check sensor correct resistance: if resistance = 0, replace the sensor;
if resistance is correct, it means that the brown cable has ground connection: restore the
cable harness.
engine temperature sensor 119- open circuit, shorted to positive.
Error cause
•
If the circuit is open, shorted to positive: excessive voltage has been detected at PIN D4 of
the control unit connector.
Troubleshooting
•
If the circuit is open, shorted to positive: check the sensor connector and the Walbro control
unit connector. If they are not OK, restore the cable harness; if OK, check the continuity of
the sensor; if it is not OK, replace the sensor; if it is OK, check the continuity between PIN
D4 of the control unit connector and PIN 1 of the sensor brown cable: restore cable harness
Electrical system MXV 450
ELE SYS - 60
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