Content Theft Deterrent Malfunction
Diagnostic Instructions
Circuit/System Description
The content theft deterrent system is a software based system in
which the body control module (BCM) actively monitors certain
inputs to determine if unauthorized vehicle access is being
attempted. Based on inputs such as the door ajar switches, the rear
compartment ajar switch, and the hood ajar switch, the BCM
determines whether a content theft deterrent alarm is warranted. If
unauthorized access is being detected, the BCM will pulse the
vehicle horn and flash the turn signals as a means of theft
deterrence.
Diagnostic Aids
The scan tool BCM Content Theft Deterrent Trigger History 1, 2,
and 3 parameters can be used to help isolate an intermittent
unwanted content theft deterrent alarm. These parameters are a
rolling history of the previous three causes of a theft deterrent
alarm. If all three parameters are indicating the same alarm
trigger, the indicated input should be the starting point when
diagnosing an intermittent concern.
Reference Information
Schematic Reference
Theft Deterrent System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Content Theft Deterrent (CTD) Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, individually open and close each vehicle
door, hood, and rear compartment while observing their respective
ajar indicator/message. The indicator/message should accurately
transition between the ajar and closed state when each access is
opened and closed.
⇒ |
If the indicator/message does not
change |
|
Refer to the appropriate symptom diagnostic
below: |
⇓ |
If each indicator/message
changes |
- Completely lower the driver door window and close all
vehicle doors.
- Ignition OFF, arm the content theft deterrent system
by locking the door with the keyless entry transmitter. Verify the
BCM scan tool Content Theft Deterrent Alarm Status parameter is
Armed.
⇒ |
If the parameter does not display
Armed |
⇓ |
If the parameter displays
Armed |
- Without disarming the system, reach in through the
open driver window and open the driver door. Verify the BCM scan
tool Content Theft Deterrent Alarm Status parameter is Alarm.
⇒ |
If the parameter does not display
Alarm |
|
Replace the K9 Body Control Module. |
⇓ |
If the parameter displays
Alarm |
- With the door open, verify the vehicle horn is pulsing
and the exterior lamps are flashing.
⇒ |
If the horn is not
pulsing |
⇒ |
If the exterior lights are not
flashing |
⇓ |
If the horn is pulsing and the
exterior lamps are flashing |
- All OK.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for BCM replacement, programming and
setup
|