Sym HD2 125 Service Manual page 81

5. Fuel Injection System
TA Sensor
Resistance value measurement
5-18
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Functional Description:
Use ECU DC 5V power supply provided, has the two-pin coupler, a
voltage output pin; another one for a grounding pin.
Its main component is a negative temperature coefficient (resistance
●
temperature rise smaller) thermistor.
Installed in the air cleaner on the intake temperature sensor within the
●
resistance, with the induction to the temperature change, and
converted into voltage signals sent to the ECU then calculated the
temperature and, in accordance with the ECU temperature and state
amendments injection time and ignition angle.
Testing Procedures:
Resistance Value Measurement:
Dismantled inlet temperature sensor connector.
●
Use of the "Ohmmeter" Ohm stalls, inspection sensor resistance.
●
Detection judge:
Resistance value and the temperature between relationships as follows
Temperature ( )
℃
-20
40
100
Treatment of abnormal phenomena:
Temperature sensor damage or connector poor contact.
●
Check whether the abnormal wire harness lines.
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Temperature sensor anomaly, the proposed replacement of the
●
temperature sensor.
Resistance value (KΩ)
18.8 ± 2.4
1.136 ± 0.1
0.1553 ± 0.007