Page 209 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 12.4: Remove and Refit EGR Valve

Objectives

At the end of this exercise you shall be able to
• identify EGR Valve
• disconnect EGR valve connection
• measure EGR Valve Resistance
• remove EGR Valve
• inspect EGR valve
• replace EGR Valve.

Requirements

Tools/Instruments Materials
• Trainee’s tool kit - 1 No. • Tray - 1 No.
• Screw Driver set - 1 No. • Cotton waste - 1 No.
• Box Spanner set - 1 No. • Kerosene - as reqd.
• Digital Multimeter/Ohmmeter - 1 No. • Vacuum hose - as reqd.
Equipments/Machines • EGR valve - 1 No.
• Diesel Vehicle - 1 No.

Procedure

1 Locate the EGR Valve (Fig1)
2 Disconnect negative terminal cable from battery.
Warning: Work must be started after 1min from the time ignition switch is turned on to LOCK position and the
negative (-) terminal cable is disconnected from the battery.

3 Disconnect exhaust gas recirculation valve connector (Fig 1)
4 Inspect exhaust gas recirculation valve resistance
5 Using an ohmmeter measure the resistance between terminal B1 (or B2) and other terminals (S1, S2,S3 and
S4) (Fig 2)

Fig 1 Fig 2

6 Resistance (Cold) should be 19.9 to 23.4 Ohms

7 Drain engine coolant
8 Remove exhaust gas recirculation valve
9 Disconnect the water bypass hose (from IAC Valve (Fig 3) (1)

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