Replacing Immobilizer Control Module

Replacing immobilizer control module

General




After installation a new immobilizer control module must be initiated (programmed). Information, such as which engine control module (ECM) it will be communicating with, must be programmed in. The immobilizer control module adapts communication accordingly. This adaptation cannot be changed. This means that the immobilizer control module cannot be transferred between different cars.
All cars with immobilizer have a unique have a unique PIN, Immobilizer-VGLA code and in certain cases a VIN code that is programmed in to the control module at the factory or when a defective control module has been replaced with a replacement part.
This/these codes cannot be changed. They are stored together with other information about the car in Volvo's database.
When programming control module keys, the control module security code is programmed into the transponder in the keys. When replacing with a new immobilizer control module, all keys must be replaced. The new control module does not recognize the previous control module security code.
When replacing a defective control module with a replacement part:
- all codes in the previous control module
- new keys
must be programmed in.
This is carried out during initiation of the Data Link Connector (DLC) in VIDA.

Identification




1. P/N
2. Production week
3. Software number
4. Immobilizer generation 3

Removal




Ignition off.

Remove:
- driver's side soundproofing panel.
- control module with a screwdriver.
- connector from control module.

Installation

Note! Only new keys can be used. All old keys are no longer useable.

Check that no pins or sockets are damaged on the connector.
Install in reverse order.
Initiate the control module in the Data Link Connector (DLC).