P1641

Fault symptom
Car fails to start.

Condition
Diagnostic trouble code (DTC) P1641 stored in the engine management system if alarm code absent.







Diagnostic procedure
1 Check the engine management system diagnostic trouble code (DTC)
- Connect an Intelligent Saab Tester (ISAT) scan tool.
- Select "TRIONIC" or "MOTRONIC", depending on the engine management system in question.
- Select "READ FAULT CODES".
Is diagnostic trouble code (DTC) P1641 stored?
[YES] Continue with point 2.
[NO] Continue fault diagnosis on the engine management system as described in Engine Management System.







2 Program the VSS alarm code
- Select "THEFT ALARM".
- Select "IMMOBILIZING".
- Program the correct alarm code in the VSS electronic control module.
- Select "TRIONIC" or "MOTRONIC", depending on the engine management system in question.
- Select "CLEAR FAULT CODES".
- Try to start the car.
Has it started?
[YES] The remedial measures taken were correct.
[NO] The alarm code is incorrect or absent. Continue fault diagnosis on the engine management system as described in Engine Management System.







3 Check the alarm code status in VSS
- Select "THEFT ALARM".
- Select "READ VALUES".
- Select "ALARM CODE".
Is the alarm code correct?
[YES] Continue with point 4.
[NO] The alarm code is incorrect or absent. Continue fault diagnosis on the engine management system as described in Engine Management System.

4 Final test
Start the car and check to see if the fault symptom persists.
Does the trouble persist?
[YES] Continue as described in "Before Changing The Electronic Control Module".
[NO] The remedial measures taken were correct or the fault is of intermittent nature.