P1640

Fault symptom
Car fails to start

Condition
Diagnostic trouble code (DTC) P1649 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) P1640 stored?
[YES] Continue with point 2.
[NO] Continue fault diagnosis on the engine management system. Powertrain Management


2 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 3.
[NO] The alarm code is incorrect or absent. Continue fault diagnosis on the engine management system as described in Engine Management System.

3 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.