B2947

DTC B2947 Security System Sensor Power CKT Low:

CIRCUIT DESCRIPTION
The security system power circuit supplies power from the Body Control Module (BCM) to the Passlock sensor on CKT 1459.

CONDITIONS FOR SETTING THE DTC
All of the following conditions must be met:
^ The Passlock power is active.
^ The Passlock power feedback is not present for 1 second.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM turns OFF the Passlock power as long as a current fault code is set.
^ The BCM stores DTC B2947 in the BCM memory.
^ The vehicle will start immediately and then stall.
^ The security indicator remains illuminated.

CONDITIONS FOR CLEARING THE DTC
^ The BCM goes to sleep and reinitializes with the fault cleared.
^ All of the BCM history codes are 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 action often causes 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 1459 between the Body Control Module (BCM) and the Passlock sensor.