B3031

Chart 1 Of 2:

Chart 2 Of 2:

Wiring Schematic:

CIRCUIT DESCRIPTION
In this mode, the Passlock/EVO module will learn the current Passlock sensor code value. The following list is the 2 Passlock learn procedures:
^ A 10 minute procedure that requires a Techline terminal.
^ A 30 minute learn procedure that requires a scan tool in order to clear the codes.

CONDITIONS FOR SETTING THE DTC
^ A new (never installed in a vehicle) Passlock/EVO module has been installed and the ignition is turned to ON but is not rotated to crank. Once the ignition switch has been rotated to crank, the Passlock/EVO module will learn the Passlock code.
^ The Passlock/EVO module is in the learn mode but does not see a valid Passlock sensor code because of a sensor or a wiring problem.

ACTIONS TAKEN WHEN THE DTC SETS
The vehicle will not run and the security telltale will be ON.

CONDITIONS FOR CLEARING THE DTC
^ The DTC will clear after an ignition cycle has occurred after the Passlock/EVO module has learned a valid code.
^ Passlock/EVO module history codes will be cleared after 100 ignition cycles with no current codes active.
^ Using a scan tool.

DIAGNOSTIC AIDS
^ Prior to replacing a Passlock/EVO module ensure all the diagnostics have been completed. If the Passlock/EVO module has been replaced with an existing system condition, the replacement Passlock/EVO module will not learn a new voltage code (DTC B3031) until the original condition has been repaired.
^ Perform a visual inspection of the wiring and the connectors.
^ Inspect the Passlock sensor harness for an intermittent or poor connections (including the in-line connector). Refer to Intermittents and Poor Connections. Intermittents and Poor Connections

TEST DESCRIPTION
The numbers below refer to the numbers on the diagnostic table:
2. The Passlock/EVO module learns an analog voltage code when the ignition switch is turned to the crank position. If a Passlock/EVO module is replaced and the ignition is turned to the ON position, DTC B3031 will set until the module sees a crank switch position or until the Passlock sensor has latched.
3. Turning the ignition switch to crank will reset DTC B3031 in a new module.
4. If a conditions in 1 of the following circuits, troubleshoot the appropriate DTC prior to diagnosing DTC B3031:
^ CKT812
^ CKT1836
^ CKT1057