2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 464
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.
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical
Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Object Detection Description and Operation (UVC) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist
Systems/Description and Operation/Object Detection (UVC))Object Detection Description and Operation (UD5) (See: Accessories and Optional
Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and Operation (UD5))
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information
Circuit/System Verification
Ignition ON, activate the parking assist, observe the scan tool Park Assist Sensor Reference Voltage parameter. The reading should be between
6.3-10.4 V.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at each of the object sensors.
2. Start at the B78G rear object sensor-left outer, ignition ON, activate the park assist, test for 6.3-10.4 V between the 8 V reference circuit
terminal 1 at the object sensor harness connector and ground.
瀚慖f less than the specified range, test the 8 V reference circuit for a short to ground. If the circuit tests normal, replace the K41 parking
assist control module.
瀚慖f greater than the specified range, test the 8 V reference circuit for a short to voltage. If the circuit tests normal, replace the K41 parking
assist control module.
3. Install each object alarm sensor harness connector one at a time, checking DTCs after each sensor is connected. Verify DTC B1405 is not set
as current.
瀚慖f the DTC is set, replace the object alarm sensor that was connected immediately before the DTC set.
Note: Make sure to check front object sensors.
4. If all circuits test normal, replace the K41 parking assist control module.
