+B power supply, self-immobilizing does not work, VSS
Symptom: No immobilizing 30 seconds after the ignition key has been removed.
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+B power supply, self-immobilizing does not work, VSS
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Fault symptom
No immobilizing 30 seconds after the ignition key has been removed.
Conditions
+B power supply from the ignition switch. Self-immobilizing takes place after 3 minutes.
Diagnostic help
The ignition switch +B contact can be checked by removing the ignition key, which should cause the interior lighting to come on.
Diagnostic procedure
1 Check the VSS programming
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Connect the ISAT scan tool.
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Select "SELF-IMMOBILIZING".
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Check "TIME BEFORE ACTIV".
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Is the indicated time correct?
Continue with point 2.
Program the relevant time according to current market requirements.
2 Check the +B power supply
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Unplug connector H33-3.
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Connect the test lamp to pin 1 of connector H33-3 and a good grounding point.
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Carry out the following test sequence: - Turn the ignition switch to the "ON" position. Turn the ignition switch to the "OFF" position. Remove the ignition key.
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The test lamp should not light up when the ignition key has been removed.
Is the test lamp working correctly?
Continue with point 3.
Check and if necessary repair or replace the wiring between pin 1 of connector H33-3 and the ignition switch. If the wiring is OK, continue fault diagnosis as described in Service Manual 3:2 Electrical system, +15 power supply. ;span>
3 Check the wiring connected to the VSS electronic control module
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Check the wiring harness for continuity between pin 1 of connector H33-3 and pin 9 of the VSS electronic control module.
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Is the wiring harness correct?
Continue with point 4.
Repair or replace the wiring harness.
4 Final check
Start the car and check to see if the fault symptom remains.
Is the problem still present?
See “Before changing a control module”.
The remedial measures taken were correct or the fault is of intermittent nature.
