B3031

DTC B3031 Key Decoder Device In Assem Learn Mode:

CIRCUIT DESCRIPTION
This DTC is set when the Body Control Module (BCM) is in the learn mode. The scan tool shows the Passlock data voltage under the following conditions:
^ The BCM is in the learn mode.
^ The ignition switch is cycled.

CONDITIONS FOR SETTING THE DTC
All of the following conditions must be met:
^ Ignition 0 is inactive.
^ The Passlock key code has not been learned.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM stores the DTC B3031 in the BCM memory.
^ The vehicle will not start.
^ Security indicator illuminates.

CONDITIONS FOR CLEARING THE DTC
^ The BCM goes to sleep and reinitializes with the fault cleared.
^ All of the BCM history codes will be cleared after 100 ignition cycles (from OFF to ON) with no current codes active during the 100 ignition cycles
^ Use a scan tool.
^ The BCM learns the correct key code.

DIAGNOSTIC AIDS
If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while wiggling the wiring and connectors. This will cause the malfunction to appear.