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                     -                               -                          -