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Diagnostic Test

  1. 1)  DETERMINING IF DTC IS CURRENT 

    With a scan tool, read and record DTC(s).

    With the scan tool, clear DTC(s).

    Start the engine and allow it to idle for 2 minutes then turn the engine off.

    Using the scan tool, read DTC(s).

    Does the DTC reset? 

    Yes 

    1. Go To  2).

    No 

    1. DTC is not active at this time. Test complete.
  2. 2)  VEHICLE STORED WITH NO BATTERY VOLTAGE FOR EXTENDED PERIOD OF TIME 
    NOTE: If the vehicle was allowed to sit with no battery voltage for an extended period of time the back up battery located in the siren may discharge and need to be recharged.

    Was the vehicle battery power just restored after the vehicle was stored with no power for an extended period of time? 

    Yes 

    1. Allow the vehicle to sit with a fully charged battery for two hours then restart this procedure.

    No 

    1. Replace the Siren. (Refer to SIREN - EXPORT) .
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE - BODY VERIFICATION TEST - VER 1) , also see (STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING) .
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