Daewoo Korando. Instruction - page 157
1F1-70 M162 ENGINE CONTROLS
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.4 pin and
No.3 after removing the HFM sensor connector.
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)
If the measured value is not within the specified value, the
possible cause may be in cable or ECU coupling.
HFM Sensor 12V Power Supply Inspection
1. Measure the voltage between the HFM sensor No.2 pin and
No.3 after removing the HFM sensor connector.
If the measured value is not within the specified value, the
possible cause may be in cable or over voltage protection
relay.
Iginition"ON”
0.9 - 1.1 V
Engine at idle
1.3 - 1.7 V
Specified Value
11 - 14 V
Specified Value
4.7 - 5.2 V
M162 ENGINE CONTROLS 1F1-71
OXYGEN SENSOR
1 Electricity Wire
2 Oxygen Sensor Housing
3 Sensor Ceramic
4 Electrode (Internal)
5 Electrode (External)
6 Heating Coil
7 Open Space
8 Protector Tube
Functions
The oxygen sensor optimizes the combustion (Air-Fuel Ratio
14.7:1) and resets the Air-fuel ratio in the ECU after sensing
the amount of oxygen from the exhaust gases to diminish the
exhaust gases.
-
Rich(<1) above approx. 450mV
-
Lean(>1) below approx. 450mV
Locatoin of Sensor
Oxygen sensor is located on the front exhaust pipe.
1F1-72 M162 ENGINE CONTROLS
Oxygen Sensor Signal Voltage Inspection
1. Measure the oxygen sensor signal voltage between the ECU
terminal No.11 and No.9. Maintain the engine speed ia at
idle while the coolant temperature is over 80°C.
If the measured value is not within the specified value, the
possible cause may be in cable, oxygen sensor or ECU.
Oxygen Sensor Heating Voltage Inspection
1. Measure the oxygen sensor heating voltage between the
ECU terminal No.11 and No.9. Maintain the engine speed ia
at idle while the coolant temperature is over 80°C.
If the measured value is not within the specified value, the
possible cause may be in cable, oxygen sensor or ECU.
Oxygen Sensor Heating Current Consumption
Inspection
1. Measure the oxygen sensor heating current consumption
between the ECU terminal No.9 and No.5 while the ignition
switch is in "ON" position.
If the measured value is not within the specified value, the
possible cause may be in cable, oxygen sensor or ECU.
Specified Value
0.2 - 2.0 A
Specified Value
-0.2 - 1.0 V
Specified Value
11 - 14 V
M162 ENGINE CONTROLS 1F1-73
KNOCK SENSOR
Functions
Vibration of the engine block is transmitted to the sensor and
transferred to the ECU in the form of an alternating voltage
signal via a shielded cable. The knock sensor is fastened to
the engine block to recognize knocking in all cylinders. The
ECU compares the signal and the retards firing point.
Removal & Installation Procedure
1. Disconnect the knock sensor connector from the intake
manifold bracket.
2. Unscrew the mounting bolt (M8 X 28) from the knock sensor
installed on the cylinder block and remove the knocking
sensor.
Installation Notice
3. Installation should follow the removal procedure in the
reverse order.
Tightening Torque
22.5 - 27.5 Nm
