Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B0685 02: Security System Indicator Circuit Short to GroundDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Security Indicator Control | B0685 02 | 1 | 1 | -- |
1. Security Indicator Malfunction | ||||
Circuit/System Description
The security indicator is controlled by the body control module based on commands from the immobilizer system or the content theft deterrent system. With the ignition OFF, the security indicator is commanded by the content theft deterrent system. With the ignition ON, the security indicator is commanded by the immobilizer system.
The security indicator is located in the instrument panel cluster and is supplied B+ at all times. When the immobilizer or content theft deterrent system requests the indicator be commanded ON, the body control module grounds the security indicator control circuit, illuminating the indicator.
Conditions for Running the DTC
The system voltage is at least 9 V and no more than 16 V.
Conditions for Setting the DTC
| • | The body control module detects a short to ground on the security indicator control circuit. |
| • | The above condition exist for 1 second. |
Action Taken When the DTC Sets
Security indicator output is disabled
Conditions for Clearing the DTC
| • | A current DTC is cleared when the conditions for setting the DTC are no longer present. |
| • | A history DTC will clear after 40 malfunction free ignition cycles. |
Reference Information
Schematic Reference
Theft Deterrent System Schematics
Connector End View Reference
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, command the Security Indicator ON and OFF with a scan tool. The security indicator should turn ON and OFF when changing between the commanded states.
| ⇒ | If the security indicator does not illuminate, replace the P16 instrument panel cluster. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for body control module or instrument panel cluster replacement, setup, and programming
