Page 210 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

10 Disconnect water bypass hose (from rear water bypass joint) (Fig 3) (2)
11 Remove the nuts of exhaust gas recirculation valve and gasket (Fig 4)

Fig 3 Fig 4

12 Visually inspect EGR valve for sticking and heavy carbon deposits (Fig 5)
13 If problem is found replace the EGR valve assembly.

14 If not, Inspect EGR valve operation.
15 Apply battery voltage to terminal B1 and B2,and while repeatedly grounding (Fig 6) (*S4) - (S4 and *S3)-(S3
and *S2)- (S2 and *S1) - (S1 and *S4) in sequence, and check that the valve moves towards the open position.
(Hint: Keep the terminal marked with an asterisk (*) grounded to the next grounding.)

Fig 5 Fig 6

16 Apply battery voltage to terminal B1 and B2,and while repeatedly grounding (Fig 7) (*S1) - (S1 and *S2)-
(S2 and *S3)- (S3 and *S4) - (S4 and *S1) in sequence, and check that the valve moves towards the closed
position.(Hint: Keep the terminal marked with an asterisk (*) grounded while proceeding to the next grounding.
17 Perform this operation after opening the valve by performing the step above.
18 If operation is not as specified, replace the EGR Valve assembly.

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CITS : Automotive - Mechanic Diesel - Exercise 12.4