Page 179 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

Test the EGR valve

1 Disconnect battery negative cable.
2 Remove EGR valve connector.
3 Remove EGR valve.
4 Check the resistance between terminals of EGR valve. If resistance is out of specification, Replace EGR valve

5 Connect a battery positive terminal to power supply terminal and Negative terminal to ground terminal of EGR
valve.
6 Check the valve operation, If it is not operated, Replace EGR valve.

Test the fuel Injector
1 Disconnect battery negative cable.
2 Remove the first cylinder Fuel Injector wire connector.
3 Connect the multi meter test leads to fuel injector terminals.
4 Measure the resistance value of Injector and compare the resistance value with manufactures specified value.
If it is low or high or replace the Injector.
5 Check the resistance value of other injectors and replace if necessary.
6 Reconnect the wire connectors and Battery negative cable.
7 Connect the oscilloscope test probes to the first cylinder injector wires and set the voltage and Time as
specified by the manufacturer service manual.
8 Start the engine and check the wave pattern of Injector.
9 Compare the wave pattern with manufacturer’s service manual data. If it is not matching replace the Injector.

10 Test the other fuel injectors with oscilloscope.

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CITS : Automotive - Mechanic Diesel - Exercise 9.6