Page 80 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

TASK 5: Ckeck oil control solenoid valve and oil

1 Check the engine oil viscosity and ensure the oil grade as per manufacturers recommendation
2 If oil is dirty or low oil level, replace the engine oil and top up it
3 Locate the solenoid valve that controls the flow of oil to the variable valve timing mechanism
4 Find out which solenoid wire is receiving ground

5 Start the engine and run at around 2500 rpm
6 Ground the solenoid signal wire and observe engine operation. There should be noticeable change in engine
speed and sound as per valve timing changes. If the engine speed or sound did not change the solenoid is
defective
7 Replace the solenoid valve if it is defective
8 Remove the oil control valve and filter, clean it. If necessary replace it.

TASK 6: Checking of valve timing
1 Remove the timing gear cover
2 Rotate the cam shaft and bring the engine is 1 cylinder pistion at TDC position of compression stroke
3 Check the timing marks on the engine crank shaft and cam shaft is properly aligned, if it is not properly aligned
remove the belt and realign it.
4 Refix the belt.

TASK 7: Checking of cam shaft sensor
1 Disconnect connector of CMP sensor.
2 Turn ignition switch to ‘ON’ position.

3 Check the voltage of CMP sensor connection (vehicle side) between terminals 1 and 2 which shows battery
voltage. If faulty check power supply circuit and ground connection.
4 Check the CMP sensor signal output voltage as specified by the manufacturer.

5 If voltage is found defective, remove CMP sensor.
6 Check the CMP sensor ‘O’ ring id free from damage.
7 Check the end face of sensor and signal rotor tooth are free from any metal particles and damage.
8 Check the CMP sensor resistance varies as specu=ified below by passing magnetic substance (screw driver
metal end tip). CMP sensor resistance varies between less than 220ohm ‘ON’ and infinity (OFF condition).

TASK 8: Erasing of VVT DTC

1 Connect the scan tool to DTC at vehicle after rectifying the fault related to the DTC code shown earlier
2 Go to the DTC trouble code and select the trouble code
3 Press erase key on the scan tool
4 Keep the ignition key ‘ON’ position and engine ‘OFF’ condition
5 Confirm the erasing pressing ‘YES’ key on the scan tool
6 Now DTC is cleared. Confirm it by starting the engine once again.

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CITS : Automotive - Mechanic Diesel - Exercise 2.26 CITS : Automotive - Mechanic Diesel - Exercise 2.26