B1E3A

DTC B1E3A

DTC Descriptors

DTC B1E3A 03
- Sensor Power Circuit Voltage Below Threshold

DTC B1E3A 07
- Sensor Power Circuit Voltage Above Threshold

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

Circuit/System Description

The object alarm detection system senses how close the vehicle is to an object. The distance is determined by the 4 ultrasonic sensors located in the rear and front (if equipped) bumpers. The object detection system will notify the driver when backing up or moving forward while parking at speeds less than 8 km/h (5 mph), which make parking easier and helps you avoid colliding with objects such as parked vehicles. The object detection system will use front and rear display indicators and the radio speakers for notification.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B1E3A 03

The object alarm module has detected the object alarm sensor supplied voltage circuit is below 7.2 volts.

B1E3A 07

The object alarm module has detected the object alarm sensor supplied voltage circuit is above 9.2 volts.

Action Taken When the DTC Sets

* The object alarm module commands ON the information center telltale red indicator.
* The object alarm module sends a GMLAN serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message on the DIC, and the chime is commanded ON.

Conditions for Clearing the DTC

* The DTC becomes history when the conditions for setting the DTC are no longer present.
* The object alarm module receives a clear code command from the scan tool.

Circuit/System Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

* The front object alarm sensors

* The rear object sensors

* The front and rear object alarm module

* The front object alarm sensors wiring harness connector

* The rear object sensors wiring harness connector

* The front and rear object alarm module wiring harness connector

1. Ignition ON and the scan tool installed, verify that DTC B1325 is not current.

• If current, refer to DTC B1325. B1325

2. Ignition ON and the scan tool installed, verify that DTC B0954, B0955, B0956 or B0957 is not current.

• If current, refer to DTC B0954, B0955, B0956, or B0957. B0954

3. Ignition ON and the scan tool installed, verify that DTC B0958, B0959, B0960 or B0961 is not current.

• If current, refer to DTC B0958, B0959, B0960, or B0961. B0958

4. Ignition ON and with the transmission range in drive or 1st gear for the front object alarm system or in reverse for the rear object alarm system, verify that the scan tool Sensor Feed Voltage Output parameter is between 7.2 V - 9.2 V.

• If less than 7.2 V, test the supply voltage circuit of the object alarm sensor for a short to ground or an open/high resistance. If the circuit tests normal, replace the rear or front (if equipped) object alarm module.

• If greater than 9.2 V, test the supply voltage circuit of the object alarm sensor for a short to voltage. If the circuits test normal, replace the object alarm module.

5. If all circuits test normal, test or replace the suspect object alarm sensor for the rear or front object alarm system.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

* Programming and Relearning for front and rear object alarm module setup, and programming.
* Rear Object Sensor Replacement
* Front Object Alarm Sensor Replacement Verification Tests