Checking the Starter Interlock +50

Fault symptom
The starter motor tails to start.
Fuse 36 blows.
When activated, the alarm is not triggered in the Start position.
The starter motor engages in different ignition switch positions.

Diagnostic procedure
1 Check that fuse 36 is intact and live with current.
2 Connect the Intelligent Saab Tester (ISAT) and from the menu select "ACTIVATE" and then "START DETENT". Activate the starter interlock with "ON".
When the ISAT shows that the starter interlock has been activated, it should not be possible to start the car.
If this is not so, proceed to Before Control Module Replacement. Before Control Module Replacement
3 If the car cannot be started with the starter interlock inactivated , connect the BOB and check that a supply of 12 V is present across pin 18 of the anti-theft alarm and a good grounding point when the ignition switch is turned to the Start position.
4 If the voltage is not OK, check the wiring between fuse 36 and pin 18 of the anti-theft alarm for continuity/shorting.
The resistance should be < 1 ohm.
If the fuse blows immediately on starting, the wiring is shorting to ground.





5 Check that a supply of 12 V is present across pin 1 of the anti-theft alarm and a good grounding point when the ignition switch is turned to the Start position.
6 If the supply voltage is OK in point 5,

A check that a supply of 12 V is present across pin 86 of the starter relay and a good grounding point when the ignition switch is turned to the Start position.
B Also check that pin 85 of the relay is properly grounded.




7 If the supply voltage in point 6 is not OK, check the wiring for continuity/shorting between pin 1 of the control module and pin 86 of the starter relay.
The resistance should be < 1 ohm.
If the fuse blows immediately on starting, the wiring is shorting to ground.

Cars with automatic transmission
On cars with automatic transmission the wiring is run via the starter interlock switch in the selector lever position sensor.
If a supply of 12 V is present on the switch input but not on its output in position P or N, the switch is at fault. Continue fault diagnosis with Automatic Transmission/Transaxle

Cars equipped with SENSONIC
On cars with an automatic clutch, the wiring is run via the SENSONIC control module.
If a supply of 12 V is present on pin 26 but not on pin 5 of the control module connector, the SENSONIC system is at fault. Continue fault diagnosis as described in "SENSONIC".