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
