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 B1008 42: Calibration Data Not Programmed

### Circuit/System Description

When the ignition is ON, the rear object alarm module performs a self[dash ]test to diagnose critical malfunctions within itself. When the rear object alarm module has completed the power-up mode the rear object alarm module will establish communication with the body control module (BCM). During the power-up mode the rear object detection alarm module will check for a valid calibration data set, if no valid calibration set is found the rear object alarm module will set a DTC and command the object detection enable/disable switch indicator OFF.

### Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

### Conditions for Setting the DTC

This code will set as current when the calibration set does not exist in the rear object alarm module upon start-up.

### Action Taken When the DTC Sets

• | The rear object alarm module sets a DTC.

• | No confirmation tone will be heard when reverse gear is selected and hand brake is released.

### Reference Information

#### Schematic Reference

Object Detection Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References

### Circuit/System Testing

Ignition ON, using a scan tool check that DTC B1008 is set in history.

⇒ | If DTC B1008 is current perform the programming setup.

### Repair Instructions

• | Perform the Diagnostic Repair Verification .

• | Control Module References .