Object Detection
DTC B1405
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions 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 object sensor supply voltage circuit and provides ground via the object sensor 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 object sensor 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 object sensor supply voltage circuit is shorted to ground.
B1405 03
The parking assist control module has detected the object sensor supply voltage circuit is less than 7.2 V.
B1405 07
The parking assist control module has detected the object sensor supply voltage circuit is greater than 9.2 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 [1][2]Collision Avoidance and Parking Assist Systems
Connector End View Reference
Component Connector End Views Sunshade - Left Front
Description and Operation
Object Detection Description and Operation (UD7) Object Detection (UD7)Object Detection Description and Operation (Front View Camera with UEU) Object Detection Description and Operation (Front View Camera with UEU)Object Detection Description and Operation (Front View Camera with UFL) Object Detection Description and Operation (Front View Camera with UFL)Object Detection Description and Operation (UVC) Object Detection (UVC)
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the transmission is in REVERSE.
• If the transmission not in REVERSE
Refer to DTC B2545 B2545
• If the transmission is in REVERSE
3. Verify the scan tool Park Assist Sensor Reference Voltage is between 7.2-9.2 V.
• If not between 7.2-9.2 V
Refer to Circuit/System Testing.
• If is between 7.2-9.2 V
4. All OK.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at each of the object sensors, ignition On, transmission in REVERSE
2. Test for 7.2-9.2 V between the object sensor reference circuit terminal 1 at all B78 Rear Object Sensor harness connectors and ground.
• If less than 7.2 V
1. Ignition OFF, disconnect the harness connector at the K41R Rear Parking Assist Control Module.
2. Test for infinite resistance between the 8 V reference circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the 8 V reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K41R Rear Parking Assist Control Module.
• If greater than 9.2 V
1. Disconnect the harness connector X 2 at the K41R Rear Parking Assist Control Module, Ignition ON.
2. Test for less than 1 V between the 8 V supply voltage circuit and ground.
• If 1 V or greater, repair the short to voltage in the circuit.
• If less than 1 V, replace the K41R Rear Parking Assist Control Module.
• If between 7.2-9.2 V
3. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Rear Parking Assist Alarm Sensor Replacement Rear Parking Assist Alarm Sensor Replacement
* Control Module References Control Module References for parking assist control module replacement, programming and setup