B0688 CHEVROLET – Security System Indicator Circuit High

 

B0688 CHEVROLET Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B0688 CHEVROLET Possible Causes

 

Faulty Instrument Panel Cluster (IPC),Instrument Panel Cluster (IPC) harness is open or shorted,Instrument Panel Cluster (IPC) circuit poor electrical connection,Faulty Body Control Module (BCM)

 

B0688 CHEVROLET Description

 

The security indicator is controlled by the Body Control Module (BCM) based on commands from the immobilizer system or the Content Theft Deterrent (CTD) system. With the ignition OFF, the security indicator is commanded by the CTD system. With the ignition ON, the security indicator is commanded by the immobilizer system. The security indicator is located in the Instrument Panel Cluster (IPC) and is supplied B+ at all times. When the immobilizer or CTD system requests the indicator be commanded ON, the BCM grounds the security indicator control circuit, illuminating the indicator.