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Diana MataJul 28, 2025
What to do if the Automotive Diagnostic Equipment causes the red security light to turn on and the vehicle won’t start?
- SsmithelizabethJul 28, 2025
If the red security light is on, the ignition state won’t change, or the vehicle won’t start, it's likely that the computer didn't finish its synchronization routine and needs a sleep/wake cycle. Wait a few minutes before changing the ignition state, then perform one sleep cycle.