For 1990-2009 cars

### 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 Descriptor

DTC B0983 00: Security System (non-telltale) Indicator 2 Circuit

### Circuit/System Description

The security system indicator is located in the instrument panel cluster. The security system indicator supplies voltage the body control module (BCM). The BCM supplies a ground to the security system light circuit which illuminates the security system light when the system is activated, the circuit is hard wire to the BCM.

### Conditions for Running the DTC

• | System voltage is between 9-16 volts.

• | Ignition switch is in the ON position.

### Conditions for Setting the DTC

DTC B0983 will set when the BCM detects an open/high resistance or short to voltage in the security system indicator circuit.

### Action Taken When the DTC Sets

The BCM will set the DTC as current.

### Conditions for Clearing the DTC

• | The condition for setting the DTC is no longer present.

• | The DTC can be cleared using a scan tool.

### Reference Information

#### Schematic Reference

Instrument Cluster Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References

### Circuit/System Testing

1. Verify that no other DTCs are set.

⇒ | If any other DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

2. Disconnect the BCM harness connector. Connect a test light between a known ground and the signal circuit of the wiring harness.

⇒ | If the test light does not illuminate check the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the IPC.

3. Reconnect the BCM harness connector.
4. Operate the central locking while observing the security system indicator.

⇒ | The security system indicator should illuminate and deactivate with the central locking. If the security light does not change state when activating the central locking, replace the BCM.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM or IPC replacement, setup and programming.