PRE-RELEASE
Symptoms - Immobilizer
| Symptoms - Immobilizer |
| Important | ||
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The following steps must be completed before using the symptom tables. |
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| 1. |
Perform the
Diagnostic System Check - Vehicle
before using the symptom tables in order to verify that all of the following are true:
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| • |
There are no DTCs set.
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| • |
The control modules can communicate via the serial data links.
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| 2. |
Review the system operation in order to familiarize yourself with the system functions. Refer to
Immobilizer Description and Operation
.
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| Visual/Physical Inspection |
| • |
Inspect for aftermarket devices which could affect the operation of the systems. Refer to
Checking Aftermarket Accessories
.
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| • |
Inspect for easily accessible or visible system components for obvious damage or conditions which may cause the symptom.
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| Intermittent |
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .
| Symptom List |
Refer to OnStar Stolen Vehicle Slowdown Active in order to diagnose the symptom.
