B2960

DTC B2960

CIRCUIT DESCRIPTION




The Passlock(TM) system is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate. The Passlock controller reads the coded Passlock(TM) data signal. The data consists of a voltage generated by a voltage divider network created between the Passlock assembly and the Passlock(TM) controller. If the data is correct , indicating rotation of the lock cylinder with the proper mechanically cut key, then the Passlock(TM) controller sends a password to the Powertrain controller over the class 2 bus to indicate that starter engagement should be allowed. The Passlock(TM) controller also interfaces with the driver displays subsystem to indicate, via a Security telltale, the Passlock(TM) subsystem's status and acute subsystem failures.

CONDITIONS FOR SETTING THE DTC
- The BCM will inspect for a valid code when the ignition is rotated from ON to CRANK and will continue to monitor the signal during the engine running period.
- The BCM is reading a valid but different code value than previously learned form the Passlock(TM) sensor.

ACTION TAKEN WHEN THE DTC SETS
- The vehicle will not start if the fault occurs before you start the vehicle. The security indicator will be FLASHING.
- If the vehicle is running when the fault occurs, the BCM will be in the fail enable mode allowing the vehicle to start and run. The security indicator will be ON.

CONDITIONS FOR CLEARING THE DTC
- The DTC will clear once an ignition cycle occurs without the fault recurring.
- The BCM history codes will clear once 100 concurrent ignition cycles occur without the fault recurring.
- Using a scan tool.

DIAGNOSTIC AIDS
- Use a scan tool in order to inspect the Passlock(TM) data voltage and the Passlock(TM) code.
- Inspect for poor connections at the Passlock(TM) sensor. Refer to Diagnostic Aids for Circuit Testing and Wiring Repair procedures.

TEST DESCRIPTION

Steps 1-10:

The number below refers to the step number on the diagnostic table.
6. Tests for the proper operation of the circuit in the normal voltage range.