Exhaust Gas Recirculation Assembly Overview

Exhaust Gas Recirculation Assembly Overview

• Activation of the Exhaust Gas Recirculation (EGR) system occurs from Engine Control Module (ECM) 1 (J623) and ECM 2 (J624) via the EGR potentiometer (G212) and the EGR position sensor (G466).

• The components illustrated correspond to cylinder bank 1. They are a mirror image of the components for cylinder bank 2.

• Bypass flap with cooler assembly overview, refer to --> [ Bypass Flap with Cooler Assembly Overview ] Bypass Flap with Cooler Assembly Overview.





1 Test connection bracket

• Cylinder bank 1: --> [ (Item 6) Test connection ] Engine Compartment Fuel Lines, Connection Diagram.

• Cylinder bank 2: --> [ (Item 1) Test connection ] Engine Compartment Fuel Lines, Connection Diagram.

2 8 Nm

3 Seal

• Replace.

• Before installing, check the sealing surfaces for contamination and clean if necessary.

4 Gasket

• Replace.

• Note installation position.

5 To the bypass flap

• --> [ (Item 16) Connecting pipe ] Bypass Flap with Cooler Assembly Overview.

6 Connecting pipe

7 20 Nm

8 From the bypass flap

• --> [ (Item 17) Connecting pipe ] Bypass Flap with Cooler Assembly Overview.

9 Bracket

For connecting pipe --> [ (Item 10) Connecting pipe ].

10 Connecting pipe

11 Connecting pipe

12 8 Nm

13 To turbocharger

• --> [ (Item 5) Turbocharger ] Turbocharger Assembly Overview.

14 Exhaust manifold

• Exhaust manifold assembly overview, refer to --> [ Exhaust Manifold Assembly Overview ] Exhaust Manifold Assembly Overview.

15 Intake connection with intake flap motor

Cylinder bank 1:

• Intake flap motor (V157).

Cylinder bank 2:

• Intake flap motor 2 (V275).

16 EGR vacuum regulator solenoid valve with EGR potentiometer

Cylinder bank 1:

• EGR vacuum regulator solenoid valve (N18) (electro-pneumatic) with EGR potentiometer (G212).

Cylinder bank 2:

• EGR valve 2 (N213) (electro-pneumatic) with EGR position sensor (G466).

If EGR vacuum regulator solenoid valve is replaced with EGR potentiometer, you must then:

- Switch ignition on and off.

- Then wait for one minute for the control module after run.

- Start engine and let run at idle for at least 1 minute.

- Then, check the Diagnostic Trouble Code (DTC) memory of the ECM. Refer to --> [ Engine Control Module, DTC Memory Checking and Erasing ] Component Tests and General Diagnostics.

If a fault is stored in DTC memory:

- Repeat work procedure.

17 Intake manifold

• Removing and installing, refer to --> [ Intake Manifold ] Intake Manifold.