Service mode i need to get into the service mode in order to ghange the sound system

Door Key Switch
The BCM monitors the door key switches in order to disarm the CTD system. When the lock cylinder turns in order to unlock the door, the switch grounds the disarm input to the BCM.
The key lock input to the BCM is probably missing , BCM doesn't see it . So it think's your breaking into the vehicle. Did you try the passenger door to see if it will disable the alarm .
The BCM - body control module ! Electronic -computer !
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Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

The factory service repair manual has a 23 step diagnostic procedure . An you would need a factory scan tool to find the correct fix.
Turn ON the ignition with the engine OFF.
With a scan tool, observe the door key switch parameter in the Body Control Module (BCM) security data list.
Does the scan tool display INACTIVE?

Locking the Vehicle Without Arming the System
Use one of the following procedures in order to lock the vehicle without arming the system:
• Procedure A -- Lock the vehicle using the manual door lock knobs. Close all the doors.
• Procedure B -- Close all the doors. Use the key or the power door lock switch in order to lock the door. The doors must be closed prior to locking the doors for this procedure.
Disarming the System
In the arm initiated mode, the following conditions are true:
• The security telltale is ON.
• The doors are open.
In order to disarm a system in the arm initiated mode, perform one of the following procedures:
• Press the power door lock switch to the UNLOCK position.
• Press the door unlock button on the key fob.
In order to disarm a system in the arm delay or the armed mode, perform one of the following procedures:
• Use the key in order to unlock one of the doors.
• Press the door unlock button on the key fob.
Deactivating the Alarm
In the alarm mode, the following conditions are true:
• The horns sound intermittently.
• The headlights and the park lamps are flashing.
In order to deactivate a system in the alarm mode, perform one of the following procedures:
• Use the key in order to unlock one of the doors.
• Press the door unlock button on the key fob.
• If the vehicle control module (VCM)/powertrain control module (PCM) receives a valid Passlock™ ignition key rotation.

Sounds electrical. Either the distributer xap is crackes or plug wires need ghanging. Turn the key when it is raining and have a friend listen for a "snap" sound or look closely for arcing from the cap and wires. Autu stores sell a spray that dries out the wires, you may want to try that

check the power on logic on controlling board if not found change e prom

hi
higher right bottom click then choice setting then second order (get themes the ghang the home page

Hi if it ran ok before you battery was ghanged it could well be your imobaliser there is a set way of ghanging the battery you may need to disconnect the battery & follow a procedure regads mick

IF YOU JUST NEED TO FOLD THE SEAT DOWN LOOK UNDER THE BACK OF THE BACK SUPPORT, YOU SHOULD SEE A CABLE ( BLACK) PULLING THIS WILL RELEASE THE CATCH TO FOLD THE SEAT FORWARDS

u go in user and then your laptop will start after then u change your password in security setting

Page 3-11 of Link to full service manual below. Model Number different but disassembly should be similar:

http://www.servicematters.com/maytag_library/docs/16000416.pdf

so you have o ghang the fixing film

press clearmodes 107 and hold down clesr/stop until screen ghanges to sp modes then turn off and on using side or front on off switch and it will reset