B0685
DTC B0685
CIRCUIT DESCRIPTION
The body control module (BCM) controls the security lamp via the security indicator lamp supply voltage circuit. When the vehicle theft deterrent (VTD) system or content theft deterrent (CTD) system request the security lamp be illuminated, the BCM grounds the security indicator lamp supply voltage circuit, illuminating the lamp.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B0685 Security System Indicator Circuit
This vehicle has DTCs that include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information. DTC Symptom Description
CONDITIONS FOR RUNNING THE DTC
The security indicator lamp is requested on by the BCM.
CONDITIONS FOR SETTING THE DTC
- The BCM detects a short to battery in the security indicator lamp supply voltage circuit.
- The BCM detects a short to ground or an open in the security indicator lamp supply voltage circuit.
- The above conditions are present for more than 1 second.
ACTION TAKEN WHEN THE DTC SETS
- The BCM stores the DTC to memory.
- Security indicator output is disabled until next ignition cycle.
CONDITIONS FOR CLEARING THE MIL/DTC
- A current DTC clears when the malfunction is no long present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
DIAGNOSTIC AIDS
A history DTC may be caused by an intermittent short or open in the security indicator lamp supply voltage circuit.
TEST
