Component Tests and General Diagnostics

Engine Control Modules, Replacing

• Cylinder bank 1 is located in direction of travel, right.

• Cylinder bank 2 is located in direction of travel, left.

Procedure

First, check control module identification of the previous Engine Control Modules (ECM) as follows:

- Connect diagnostic tester.

- Switch ignition on.

- Under address word 33, select "Diagnostic mode 9: Vehicle information".

- Select the vehicle information "Test-ID 04: Calibration Identification".

Control module identification will be displayed, e.g.:

8D0907551AB 0001

- End diagnosis and switch ignition off.

- Remove cover -D- for plenum chamber, right side.





- Disengage and disconnect connector - A - of the corresponding Engine Control Module (ECM):





• Cylinder bank 1: Engine Control Module (ECM) (J623) (- 1 -).

• Cylinder bank 2: Engine Control Module 2 (J624) (- 2 -).

- Remove old control module and insert new one.

- Check whether the new control module identification matches the old control module identification.

• To achieve optimal anti-theft protection for the vehicle, an anti-theft immobilizer is installed. The anti-theft immobilizer is a system for enabling and locking the Engine Control Module (ECM).

• So that this system cannot be circumvented, it is necessary to perform adaptation of the anti-theft immobilizer using the Vehicle Diagnostic and Information System (VAS5052) in the On Board Diagnostic (OBD) function.

• The great availability of equipment options makes adaptation of the Engine Control Modules (ECM) necessary (e.g. cruise control system). This "writing" function is not possible with the generic scan tool.

- Functions and components, adapting:

- Generate readiness code => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.