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Home >> Porsche >> 2003 >> Boxster Base, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instruments, Fuel Gauge, Alarm System - Diagnosis >> System I 16 >> Fault overview >> Test point 21 >> Possible causes, elimination, Notes

Possible causes, elimination, Notes

  1. Pull off plug I on the alarm control module.
  2. Pull off the DME (ECM) plug.
  3. Ohmmeter at plug I, alarm control module pin 23, and DME plug pin 88.

    Display: < 5 Ω

    NOTE: The lead is routed via plug connection X 3/1 pin 14.
  4. Ohmmeter on alarm control module plug I pin 23 and ground. Display: "INFIN" Ω
  5. Voltmeter at plug I alarm control module pin 23 and ground.

    Switch on ignition.

    Display: 0 Volt

    If no fault can be detected, try replacing the alarm control module. If the fault is still present afterward, the DME control module is faulty.

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