SsangYong Musso. Manual — part 349
M161 ENGINE CONTROLS 1F2-75
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
1F2-76 M161 ENGINE CONTROLS
COOLANT TEMPERATURE SENSOR
1 Artificial Resin Housing
2 Metal Housing
3 NTC (negative temperature coefficient) Resistor
Removal & Installation Procedure
1. Remove the pressure by opening the pressure cap in the
coolant subtank.
2. Disconnect the connector and remove the coolant
temperature sensor.
Installation Notice
Replace the seals with new one.
3. Installation should follow the removal procedure in the
reverse order.
4. Check for leaks at each connections after starting the engine.
4 Connector
5 Coolant Temperature Sensor
Tightening Torque
18 - 22 Nm
M161 ENGINE CONTROLS 1F2-77
2. Measure the resistance between the coolant temperature
sensor terminal No.1 and No.4 with the coolant temperature
sensor disconnected.
Inspection
1. Measure the coolant sensor input voltage between the ECU
terminal No.79 and No.78 while the ignition switch in "ON"
position.
Notice
Replace wiring and coolant temperature sensor if out of
specified value.
allowable error :
±
5%
allowable error :
±
5%
Voltage (V)
3.57
1.22
0.78
Temperature (°C)
20
30
40
Resistance (
Ω
)
2,500
322
185
Temperature (°C)
20
30
40
1F2-78 M161 ENGINE CONTROLS
Service Data
Resistance characteristic curve according to the coolant
temperature
Temperature(
°
C)
Resistance(W) Voltage(V) Temperature(
°
C) Resistance(W) Voltage(V)
-40 48,550 4.8991 60 594 1.8632
-30 27,000 4.8214 70 434 1.5132
-20 15,670 4.7001 80 322 1.2179
-10 9,450 4.5215 90 243 0.9775
0 5,890 4.4273 100 185 0.7806
10 3,790 3.9562 110 143 0.6255
20 2,500 3.5714 120 111.6 0.5020
30 1,692 3.1426 130 88.0 0.4044
40 1,170 2.6959 140 71.2 0.3323
50 826 2.2618 - - -
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