For 1990-2009 cars

### Circuit Description

When the content theft deterrent (CTD) system arms, and the intrusion sensor is enabled, the body control module (BCM) receives a power-up acknowledgement from the intrusion sensor via the intrusion sensor enable signal circuit.

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B3089 CTD Intrusion Sensor Signal Circuit

This vehicle has DTCs which include DTC symptoms. Refer to DTC Symptom Description for more DTC information.

DTC Symptom | DTC Symptom Descriptor
--- | ---
56 | Allowable number of transitions/events exceeded

### Conditions for Running the DTC

• | The intrusion sensor is enabled.

• | The CTD system has armed.

### Conditions for Setting the DTC

The BCM does not receive the power-up acknowledgement from the intrusion sensor.

### Action Taken When the DTC Sets

The BCM will ignore all inputs from the intrusion sensor for the remainder of the CTD system arming cycle.

### Conditions for Clearing the MIL/DTC

DTC B3089 sets when one of the following conditions occurs:

• | The BCM receives a power-up acknowledgement from the intrusion sensor during the next CTD system arming cycle, and the intrusion sensor is enabled.

• | Clear the DTCs with the scan tool.

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Theft Deterrent System Schematics Connector End View Reference: Theft Deterrent System Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Verify that DTC B3089 is set.

Is DTC B3089 set as current?

Go to Intrusion Sensor Inoperative

Go to Testing for Intermittent Conditions and Poor Connections