B1E3A

DTC B1E3A

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy 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 sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The object alarm module supplies 8 volts to the object sensors via the 8 volt reference circuit and provides ground via the low reference circuit. The object alarm module triggers the sensors in a sequential loop. After each sensor transmits, the object alarm module uses the sensor ring received though the signal circuit to calculate the distance and position of an object.

Conditions for Running the DTC

* DTC B1325 is not set
* Ignition voltage is between 9-16 volts
* The vehicle is in REVERSE

Conditions for Setting the DTC

B1E3A 03

The object alarm module has detected the 8-volt reference circuit is less than 7.2 volts.

B1E3A 07

The object alarm module has detected the 8-volt reference circuit is greater than 9.2 volts.

Action Taken When the DTC Sets

* Parking assist is disabled.
* The object alarm module commands the red indicator ON.
* The object alarm module sends a serial data message to the instrument panel cluster (IPC) to display SERVICE PARK ASSIST message in the driver information center (DIC) and a chime will sound.

Conditions for Clearing

* The DTC will transition to history when the fault is no longer present.
* A history DTC will clear after 100 malfunction-free ignition cycles.

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 Parking Assist) (Object Detection Description and Operation (Rear Parking Assist))Object Detection Description and Operation (VDAAW) (Object Detection Description and Operation (VDAAW))Object Detection Description and Operation (SOD) (Object Detection Description and Operation (SOD))
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 the scan tool Sensor Voltage Feed Output parameter is 7.2-9.2 volts.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at each of the object sensors.
2. Ignition ON, transmission in REVERSE, test for 7.5-9.0 volts between 8-volt reference circuit terminal 1 and ground.

• If less than the specified range, test the 8-volt reference circuit for a short to ground. If the circuit tests normal, replace the object alarm module.
• If greater than the specified range, test the 8-volt reference circuit for a short to voltage. If circuit tests normal, replace the object alarm module.

3. Connect each rear object sensor one at a time while monitoring the scan tool Sensor Voltage Feed Output parameter. The parameter should be 7.2-9.2 volts.

• If not within the specified range, test or replace the appropriate object alarm sensor.


Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Rear Object Sensor Replacement (Rear Object Sensor Replacement)
* Control Module References (Programming and Relearning) for object alarm module replacement, setup, and programming.