EGR System

EGR System

• Activation of the Exhaust Gas Recirculation (EGR) system occurs from the engine control module (J623) and the engine control module 2 (J624) via the EGR potentiometer (G212) and the Exhaust gas recirculation position sensor 2 (G466).

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

• Bypass flap with cooler for EGR overview. Refer to => [ Bypass Flap with Cooler for EGR ] Bypass Flap with Cooler for EGR.






1 Test Connection Bracket

• Cylinder bank 1, see => [ (Item 6) Test Connection ] [1][2]Diagrams.

• Cylinder bank 2, see => [ (Item 1) Test Connection ] [1][2]Diagrams.

2 Bolt

• 8 Nm

3 Seal

• Always replace.

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

4 Gasket

• Always replace.

• Note the installed position.

5 to the Bypass Flap

• See => [ (Item 16) Connecting Pipe ] Bypass Flap with Cooler for EGR.

6 Connecting Pipe

7 Bolt

• 20 Nm

8 from the Bypass Flap

• See => [ (Item 17) Connecting Pipe ] Bypass Flap with Cooler for EGR.

9 Bracket

For the connecting pipe => [ (Item 10) Connecting Pipe ].

10 Connecting Pipe

11 Connecting Pipe

12 Bolt

• 8 Nm

13 to the Turbocharger

• See => [ (Item 5) Turbocharger ] Turbocharger Overview.

14 Exhaust Manifold

• Exhaust manifold overview, refer to => [ Exhaust Manifold Overview ] Exhaust Manifold 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:

• Valve 2 for EGR (N213) (electro-pneumatic) with exhaust gas recirculation position sensor 2 (G466).

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

- Turn the ignition on and off.

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

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

- Then, check the Diagnostic Trouble Code (DTC) memory of the Engine Control Module (ECM). Refer to => [ Engine Control Module DTC Memory, Checking and Erasing ] Scan Tool Testing and Procedures.

If a fault is stored in the DTC memory:

- Repeat the work procedure.

17 Intake Manifold

• Removing and installing, refer to => [ Intake Manifold ] Service and Repair.