Daewoo MUSSO Service Manual page 723

1F2-72 M161 ENGINE CONTROLS
HFM Sensor Input Voltage Inspection
1. Measure the HFM sensor signal voltage between the ECU
terminal No.81 and No.105.
Specified Value (coolant temperature is over 70°C)
Iginition"ON"
Engine at idle
If the measured value is not within the specified value, the
possible cause may be in cable or HFM sensor in itself.
Perform the 5V power supply inspection procedures.
HFM Sensor 5V Power Supply Inspection
1. Measure the voltage between the HFM sensor No.108(+) and
No.105(-) after removing the HFM sensor connector.
Specified Value
If the measured value is not within the specified value, the
possible cause may be in cable or ECU coupling.
2. Measure the voltage between the HFM sensor wining
connector terminal No.3 pin and No.102(+) after removing
the HFM sensor connector.
Specified Value
Specified Value
If the measured value is not within the specified value, the
possible cause may be in cable or over voltage protection
relay.
Perfrom the 12V power supple inspection procedures.
HFM Sensor 12V Power Supply Inspection
1. Measure the voltage between the HFM sensor wining
connector 1G No.2 pin(+) and No.3 after removing the HFM
sensor connector.
Specified Value
If the measured value is not within the specified value, the
possible cause may be in cable or over voltage protection
relay.
0.9 - 1.1 V
1.3 - 1.7 V
4.7 - 5.2 V
4.7 - 5.2 V
11 - 14 V