B390A

DTC B390A

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 Descriptor

DTC B390A 08
- Signal Invalid

DTC B390A 45
- ECU Hardware Performance

DTC B390A 54
- Temperature High

DTC B390A 58
- Sensor Blockage

Circuit/System Description

The B233 Radar Sensor Module - Short Range can set this code if it determines there is a fault due to the reason listed in the symptom byte.

Conditions for Running the DTC

The module continually runs the program to detect faults.

Conditions for Setting the DTC

The control module has detected a malfunction.

Action Taken When the DTC Sets

The control module will not function and the Active Safety System will be inoperable.

Conditions for Clearing the DTC

* A current DTC clears when the malfunction is no longer present.

* A history DTC clears when the control module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.

Diagnostic Aids

If DTC B390A 58 is set, check for anything that can interfere with the radar signal. Verify area in front of radar is clean of mud, ice, snow, etc. Also verify the fascia panels in front of the radar are damage-free and not obstructed by any add-on accessories such as emblems, etc.

Reference Information

Schematic Reference

Object Detection Schematics [1][2]Collision Avoidance and Parking Assist Systems

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Object Detection Description and Operation (with Active Safety System - UGN) Object Detection Description and Operation (with Active Safety System - UGN)Object Detection Description and Operation (with rear vision camera - UVC) Object Detection Description and Operation (with rear vision camera - UVC)Object Detection Description and Operation (with front and rear park assist - UD5) Object Detection Description and Operation (With Front and Rear Park Assist - UD5)Object Detection Description and Operation (with rear park assist - UD7) Object Detection Description and Operation (With Rear Park Assist - UD7)Object Detection Description and Operation (with side blind zone alert - UFT) Object Detection Description and Operation (with side blind zone alert - UFT)Object Detection Description and Operation (with rear cross traffic alert - UFG) Object Detection Description and Operation (With Rear Cross Traffic Alert - UFG)Object Detection Description and Operation (with lane departure warning - UFL) Object Detection Description and Operation (With Lane Departure Warning - UFL)Object Detection Description and Operation (with forward collision alert - UEU) Object Detection Description and Operation (With Forward Collision Alert - UEU)Object Detection Description and Operation (with Haptic Signal Motor Seat) Object Detection Description and Operation (with Haptic Signal Motor Seat)

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 that B390A 08 is not set.

• If DTC is set

1. Re-program the appropriate B233 Radar Sensor Module - Short Range.

2. Verify the DTC does not set.

• If the DTC sets, replace the appropriate B233 Radar Sensor Module - Short Range.

• If the DTC does not set

3. All OK.

• If DTC is not set

3. Verify that B390A 45 is not set.

• If DTC is set

1. Using the scan tool, lock the MEC on the appropriate B233 Radar Sensor Module - Short Range.

2. Verify the DTC does not set.

• If the DTC sets, replace the appropriate B233 Radar Sensor Module - Short Range.

• If the DTC does not set

3. All OK.

• If DTC is not set

4. Verify that B390A 54 is not set.

• If DTC is set
Replace the appropriate B233 Radar Sensor Module - Short Range.

• If the DTC is not set

5. Verify that B390A 58 is not set.

• If DTC is set

1. Verify the area in front of the sensor is clean, unobstructed, and damage-free.

• If not clean, unobstructed, and damage-free, clean or repair as necessary.

• If clean, unobstructed, and damage-free, replace the appropriate B233 Radar Sensor Module - Short Range.

• If DTC is not set

6. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module References for control module replacement, setup, and programming