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.

### Circuit/System Description

The glass breakage sensors are located on the rear side windows and is supplied B+ at all times. The body control module grounds the glass breakage sensor circuit. In the event of the interruption of voltage to the glass breakage sensors, the alarm will sound.

### Reference Information

#### Schematic Reference

Shift Lock Control Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Automatic Transmission Shift Lock Control Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Ignition ON, observe the scan tool Current Content Theft Deterrent Trigger parameter. The reading should be 0 counts.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B159L left glass breakage sensor.
2. Ignition OFF, test for less than 10 Ω between the ground circuit terminal 1 X1 and ground.

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the body control module.

3. Install a test lamp between the ground circuit terminal 1 X1 and the control circuit terminal 1 X2.

⇒ | If the test lamp is always OFF, test the control circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the B159R right glass breakage sensor.

4. If all circuits tests normal, test or replace the B159L left glass breakage sensor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming