Engine Control Modules, Replacing

NOTE:

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.

Fig 1: Identifying Covers In Engine Compartment For Plenum Chamber

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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

Fig 2: Identifying Connector, Engine Control Modules (ECM), And Ground (GND) Connection For Wiring Harness

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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.

NOTE:

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 .