2010 Cadillac CTS Sedan AWD V6-3.6L Page 372
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 B1405 02
- Control Module Voltage Reference Output 2 Circuit Short to Ground
DTC B1405 03
- Control Module Voltage Reference Output 2 Circuit Low Voltage
DTC B1405 07
- Control Module Voltage Reference Output 2 Circuit High Voltage
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 parking assist
control module supplies 8 V to the object sensors via the 8 V reference circuit and provides ground via the low reference circuit. The parking assist
control module triggers the sensors in a sequential loop. After each sensor transmits, the parking assist control module uses the sensor echo
received through the signal circuit to calculate the distance and position of an object.
Conditions for Running the DTC
* Ignition ON
* Transmission in REVERSE
Conditions for Setting the DTC
B1405 02
The parking assist control module has detected the 8 V reference circuit is shorted to ground.
B1405 03
The parking assist control module has detected the 8 V reference circuit is less than 6.3 V.
B1405 07
The parking assist control module has detected the 8 V reference circuit is greater than 10.4 V.
Action Taken When the DTC Sets
* The parking assist is disabled.
* The driver information center displays SERVICE PARK ASSIST.
