B0685
DTC B0685
CIRCUIT DESCRIPTION
The body control module (BCM) controls the security indicator based on the status of the content theft deterrent (CTD) and vehicle theft deterrent (VTD) systems. When either VTD or CTD requests the lamp illuminated, the BCM grounds the security indicator control circuit. Battery voltage is applied to the security indicator at the instrument panel cluster (IPC) and when the BCM grounds the security indicator control circuit, the security indicator is illuminated.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B0685 Security System Indicator Circuit
This vehicle has DTCs which include DTC symptoms. For more information on DTC symptoms, refer to DTC Symptom Description. DTC Symptom Description
CONDITIONS FOR RUNNING THE DTC
DTC B1325 is not set and the vehicle power mode is equal to Off, Acc, Run, or Crank.
CONDITIONS FOR SETTING THE DTC
B0685 01
The security indicator control circuit is seen to be shorted to battery when the output is active. The fault must occur for more than 125 ms.
B0685 06
The security indicator control circuit is seen to be shorted to ground or open when the output is inactive. The fault must occur for more than 1 second.
ACTION TAKEN WHEN THE DTC SETS
B0685 01
The security indicator control is disabled until the next ignition cycle.
B0685 06
No action is taken.
CONDITIONS FOR CLEARING THE MIL/DTC
- A current DTC will clear when the fault is no longer present and the ignition switch is cycled.
- A history DTC will clear after 100 consecutive ignition cycles without a fault present.
- A scan tool may be used to clear history and current DTCs.
TEST
