SsangYong Rexton. Service manual — part 425
SSANGYONG Y200
1F2-16 M161 ENGINE CONTROLS
CAMSHAFT POSITION (CMP) SENSOR
YAA1F950
The Camshaft Position (CMP) sensor sends a CMP signal to the Engine Control Module (ECM). The ECM uses
this signal as a “synchronized pulse” to trigger the injectors in the proper sequence. The ECM uses the CMP
signal to indicate the position of the #1 piston during its power stroke. This allows the ECM to calculate true
sequential fuel injection mode of operation.
1 Camshaft Position Sensor Connector
2 Bolt
3 Camshaft Position Sensor
4 O-Ring
M161 ENGINE CONTROLS 1F2-17
SSANGYONG Y200
Circuit Description
The CMP sensor sends a cam position signal to the ECM. If the cam position signal is lost while the engine is
running, the fuel injection system shifts to a calculated sequential fuel injection mode based on the last fuel
injection pulse, and the engine continuous to run.
Camshaft Position Sensor Signal Voltage Inspection
1. Measure the voltage between the ECM terminal No. 11 and No. 106 while the engine speed is at idle.
Notice: The signal voltage will be changed in the range of 1.2 ~ 1.7 v.
YAD1F150
Failure
Code
Description
Trouble Area
Maintenance Hint
Camshaft position
sensor signal : No. 1
cylinder recognition
failure
Camshaft position
sensor signal : No. 1
cylinder synchronization
failure
When no cam recognition
signal during TN 24 counts
more.
(maintain the constant low or
high level)
When synchronization fault
of cylinder 1
(TDC recognition)
•
Inspection the source voltage of CMP
sensor
•
Inspection the ECM pin 106, 104 about
short circuit or open with bad contact
•
Inspection the CMP sensor
•
Inspection the damage of sensor or
sprocket
•
Inspection the ECM
19
58
Specified Value
1.2 ~ 1.7 v
SSANGYONG Y200
1F2-18 M161 ENGINE CONTROLS
Camshaft Position Sensor Output Wave Inspection
1. Measure the output wave between the ECM
terminals No. 104 and No. 106 using the scan tool
or the oscilloscope while engine speed is at idle.
Notice: Replace the CAM sensor if cannot get the
output wave as shown in the figure.
YAD1F160
Camshaft Position Sensor Power Supply Inspection
1. Disconnect the CMP sensor Connector.
2. Measure the resistance between the No. 1 and No.
3 pin of the CMP sensor connector while the ignition
switch is in “ON” position.
Specified Value
11 ~ 14 v
Notice: If the measured value is not within the
specified value, check the cable.
SSANGYONG Y200
1F2-20 M161 ENGINE CONTROLS
CAMSHAFT ACTUATOR
YAA1F970
When the engine is running, the camshaft actuator rotates the intake camshaft hydraulically and mechanically
relative to the camshaft sprocket by 20 ° crank angle to the “advanced” position and back to the “retard”
position.
The camshaft actuator is actuated electro-mechanically by the Engine Control Module (ECM).
The positioning time of apporx. 1 second is dependent on the engine oil pressure at the camshaft actuator and on
the oil viscosity and oil temperature, respectively.
The camshaft indicator on the camshaft sprocket provides the camshaft rotational speed to the position sensor
as an input parameter for the engine ignition control unit.
Operation Condition of Camshaft Actuator
Engine RPM
Engine stop
0 ~ 1,740 rpm
1,740 ~ 3,540 rpm
Above 3,540 rpm
Camshaft Position
Retard
Retard
Advanced
Retard
Effect
-
Idle speed is improved
Blow-by gas is decreased
Valve overlap is decreased
Torque is increased
Fuel loss is decreased
NOx is decreased
Engine overrun is prohibited
1 Bolt
2 Camshaft Actuator
3 Bolt
4 Armature
5 Roll Pin
6 Nut
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