100CS Quattro Wagon V6-2.8L (AAH) (1992)
Cellular Phone: Service and Repair
Security Code, Identifying (Diagnostic Test Command 55 #)
Use the following procedure when phone programming is not possible due to an unknown or forgotten six-digit security code. This procedure is also
used to determine a forgotten lock code or phone number.
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Insert test mode connector US 30844 (arrow) in line between power cord (25-pin connector) -1- and transceiver -2-.
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Switch ignition ON.
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Switch phone ON by pressing "Pwr" button on handset. Handset readout displays two alternating sets of numbers
NOTE: This procedure can also be performed with the ignition switch OFF However when the phone is switched ON, the display may show "Loc'd".
To proceed, press the -#- key to enter the test mode directly.
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Press -#- key to enter test mode.
Handset readout displays US with an apostrophe (') in the upper right hand corner.
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Enter diagnostic command 55 # by pressing keys -5-, -5-and -#-.
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Test mode programming begins on step 1.
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Five-digit system identification number is displayed (for example, 00000)
NOTE: Sixteen different steps, each containing telephone programming information, can be displayed during this test mode.
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* key: advances to next programming step
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# key: exits program mode
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Press -*- key six times to display six digit security code (step 7).
NOTE: Press -*- key two times to display phone number (step 3) or seven times to display three-digit unlock code (step 8).
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Write down needed information.