Power Supply Function
E-11 Start Pulses
When starting the engine, the battery voltage drops to a low value for a short pe-
riod and then slightly rises again. Most components are activated directly before
starting for a short period, then deactivated during starting and activated again
after starting when the engine is running. This test serves to verify normal oper-
ation under these conditions. The starting process may be performed under dif-
ferent vehicle starting conditions, cold start and warm start. In order to cover
both cases, two different test sequences are required. A component must al-
ways undergo both sequences.
• Cold Start Test Pulse
• Warm Start Test Pulse
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