Advice on programming, changing control module, etc. for anti-theft alarm with VSS (ATA 2)
| SERVICE INFORMATION | |
| Bulletin Nbr: | 383-1764 |
| Date: ........... | June 1997 |
| Market: | EJ USU+002FCA |
| Advice on programming, changing control module, etc. for anti-theft alarm with VSS (ATA 2) |
| Cars affected |
Saab 900 M96- with anti-theft alarm VSS (ATA 2).
| Background |
This SI attends to the questions and complications that may arise when replacing and programming remote controls and control modules for the VSS alarm as well as the Trionic/Motronic control modules.
Page numbers quoted in the text refer to Service Manual “3:5 Anti-theft alarm with VSS”.
| Diagnostic procedure |
Check to see if VSS is fitted
When ISAT/Tech 2 is connected for diagnosis of the alarm, the text in the display will indicate which type of alarm is fitted on the car.Diagnosis
Make a practice of always having the ignition ON when diagnosing the system with ISAT/Tech 2. This is to avoid inadvertently emptying the remote control's program memory while the alarm is armed.| Important | ||
|
Unless otherwise stated in this SI, the ignition must be ON when programming is in progress. |
||
If an alarm that is fitted and programmed in the car has been immobilized, ISAT/Tech 2 will not be able to make contact. The alarm must then be disarmed first by pressing the left button on the remote control.
The procedure is divided into three sections:
A Control module for VSS alarm
B Remote control units
C Trionic/Motronic control module.
A. Control module for VSS alarm
Before removing the control module to be returned under warranty, its immobilizer function must first be cancelled and the remote control deprogrammed with the command “DEPROGRAM ALL” as described on page 190 in the Service Manual.
If this cannot be done for some reason, the remote control units should be returned together with the control module for repair under warranty.
If this is not done the claim will not be valid.
| Important | ||
|
The engine control module need not be changed when changing the alarm control module. |
||
The LED will double flash when the ignition is turned ON after fitting an unprogrammed control module (spare part). This is to indicate that the immobilizer is active and that no remote control units have been programmed. The engine will not start.
The control module must then be programmed as follows:
| Important | ||
|
The ignition key must be in the OFF position while programming is in progress. |
||
| 1. |
Program as described on page 186 in the Service Manual. Note that when programming the remote control unit, the command “DEPROGRAM ALL” (see page 190) must be executed before programming the “REMOTE CONTROL”.
|
|
| 2. |
Program (see page 51) the type of engine management system in the car. See menu “IMMOBILIZING”.
|
|
| 3. |
The left button on the remote control unit must be pressed 5 times in succession after completing the programming before it will work.
If the alarm control module cannot be contacted for some reason, unplug the connector to the control module and restart from step 1 after plugging it in again. |
|
After transferring an alarm control module from one car to another, the type of engine management system must be reprogrammed as described on page 51 in the Service Manual. This must be carried out even if both cars have the same engine management system.
B. Remote control units
Connect ISAT/Tech 2 to a car whose alarm is in working order. It is not necessary for the remote control unit to be programmed for the car it is being tested on.
Select the “READ VALUES” - “REMOTE CONTROL” menu. When the appropriate button on the remote control unit is pressed, this will be indicated on the diagnostic tool's display.
| • |
New remote control units can be programmed. When the remote control units are to be programmed, the “DEPROGRAM ALL” command (see page 190) must be given before programming “REMOTE CONTROL” (see page 186). |
|
| • |
Control module must be replaced. There is no way of cancelling the immobilizer with ISAT/Tech2 or any other method. |
|
C. Trionic/Motronic control module.
After changing an engine control module, the new one must be “married” to the car's alarm control module or else the engine will not start.
This is carried out with ISAT/Tech 2 (menu “IMMOBILIZING”) after making contact with the alarm system and programming the type of engine system in the car, see page 51 in the Service Manual.
These codes are not described in the manuals for the respective engine management system but can be found instead on page 140 and page 142 respectively in Service Manual “3:5 Anti-theft alarm with VSS”.
DTC will be stored in the engine control module if the alarm code from the alarm control module is absent.
DTC will be stored in the engine control module if the alarm code from the alarm control module is incorrect.
Alarm code is the code that the alarm control module sends to the engine control module when the engine is started. If the code is absent or if it is incorrect, the engine will not start .
DTCs can sometimes be generated when the alarm is immobilized and an attempt is made to start the car. If the alarm and immobilizer are working as they should, the DTCs will be ignored and cleared
| Standard time information |
Fault/Reason code: -
Failed Object: 38351
Location code: 09
Repair/Action code: 05
Time: -
This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
Our Friends
