2010 Cadillac CTS Sedan AWD V6-3.6L Page 64

2010 Cadillac CTS Sedan AWD V6-3.6L Page 64

DTC B1E3A

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) 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 sensors are 3-wire sensors that are used to determine the distance between the vehicle and an object of interest. The rear object

sensor control module supplies 8 volts to the object alarm sensors via the 8 volt reference circuit and provides ground via the low reference circuit.

The rear object sensor control module triggers the sensors in a sequential loop. After each sensor transmits, the rear object sensor control module

uses the sensor ring received through 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

* Transmission 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

* Rear parking assist system is disabled.

* The rear object sensor control module commands the red indicator ON.

* The rear object sensor control 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