B2957

DTC B2957 Security System Sensor Data Circuit Low:

CIRCUIT DESCRIPTION
This circuit supplies the Passlock data to the Body Control Module (BCM) from the Passlock sensor, CKT 1836.

CONDITIONS FOR SETTING THE DTC
All of the following conditions must be met:
^ CKT 1836 is shorted to ground.
^ Ignition 0 is active.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM stores the DTC B2957 in the BCM memory.
^ The vehicle will start, then immediately stall.
^ The security indicator will flash for 10 minutes.

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.

DIAGNOSTIC AIDS
^ Inspect for a bad connection at the Passlock sensor and the BCM.
^ 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.

TEST DESCRIPTION
The numbers below refer to the numbers on the diagnostic table.
2. This step determines if a short to ground exists in CKT 1836 between the Body Central Module (BCM) and the Passlock sensor.