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Diagnostic Trouble Code: B1231
Diagnostic Trouble Code Name: Crash Data Memory Full
Vehicle Make: Ford
Vehicle Model: Falcon (BF)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Anti-Theft Device - Wrong Security Code
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTCP0513, P0633, P1629, P1632, P1648, P1677, P1678, or P1679
Circuit / System Description
The engine control module (ECM), the powertrain interface module (PIM), and the body control module (BCM) are integral part of the vehicle theft deterrent system. The theft deterrent system authenticates the security code programmed into each of these modules to prevent unauthorized vehicle operation. This authentication process includes the following steps:
1) When the ignition is turned ON or the door is unlocked by remote key the BCM and the key exchange security data to verify the correct key is used.
2) Once the correct key has been confirmed and the ignition is turned ON, the PIM and BCM exchange data to confirm the correct BCM and PIM is being used.
3) Once the correct key, BCM, and PIM is confirmed, the PIM and ECM exchange data to allow the vehicle to start.
4) The data exchange processes conducted use various encrypted data exchanges between each of the devices.
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