B1E3A
DTC B1E3A
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC B1E3A 03
- Sensor Power Circuit Voltage Below Threshold
DTC B1E3A 07
- Sensor Power Circuit Voltage Above Threshold
Diagnostic Fault Information
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 while parking at speeds less than 8 km/h (5 mph). 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 sets a DTC.
* The object alarm module commands ON the information center telltale red indicator.
* The object alarm module will send a serial data communication message to the instrument panel (I/P) to scroll SERVICE PARK ASSIST message on the driver information center (DIC), and the chime will sound.
Conditions for Clearing the DTC
* The DTC becomes history when the conditions for setting the DTC are no longer present.
* A history DTC will clear after 100 consecutive ignition cycles, if the condition for the malfunction is no longer present.
Reference Information
Schematic Reference
Object Detection Schematics ([1][2]Collision Avoidance and Parking Assist Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Object Detection Description and Operation (Rear Park Assist) (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, transmission in REVERSE, verify that Sensor Feed Voltage Output scan tool parameter value is greater than 8.0 Volts.
Circuit/System Testing
1. Ignition OFF, disconnect harness connectors at all rear object sensors.
2. Ignition ON, transmission in REVERSE, test for 8.0 V - 9.0 V between object sensor supply voltage circuit terminal 1 and ground.
• If less than the specified range, test the supply voltage circuit for a short to ground. If all circuits test normal, replace the object alarm module.
Important: A short to voltage on the component signal circuit may cause this DTC to set.
• If greater than the specified range, test the supply voltage circuit for a short to voltage. If all circuits test normal, replace the object alarm module.
3. Connect each rear object sensor one at a time, while monitoring Sensor Feed Voltage Output scan tool parameter. The parameter value should be greater than 8.0 V.
• If less than the specified value after an individual object sensor is connected, test or replace that object sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Rear Object Sensor Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for object alarm module replacement, setup, and programming.