Pinpoint Test N: B1B44:96, B1B46:96, B1B48:96, B1B50:96

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before disconnecting the IPMA or any of the parking aid sensors, verify the connectors are properly seated and latched.

Refer to PARKING AID for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Parking Aid - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
IPMA B1B44:96	Right Rear Outer Sensor: Component Internal Failure	A continuous memory and on-demand DTC that sets when the RHR outer parking aid sensor has internally failed or has an incorrect attenuation time.
IPMA B1B46:96	Right Rear Inner Sensor: Component Internal Failure	A continuous memory and on-demand DTC that sets when the RHR inner parking aid sensor has internally failed or has an incorrect attenuation time.
IPMA B1B48:96	Left Rear Outer Sensor: Component Internal Failure	A continuous memory and on-demand DTC that sets when the LHR outer parking aid sensor has internally failed or has an incorrect attenuation time.
IPMA B1B50:96	Left Rear Inner Sensor: Component Internal Failure	A continuous memory and on-demand DTC that sets when the LHR inner parking aid sensor has internally failed or has an incorrect attenuation time.

Possible Sources

Rear parking aid sensor
IPMA

N1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPMA (IMAGE PROCESSING MODULE A) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, carry out the IPMA self-test.
- Check the parking aid Diagnostic Trouble Codes (DTCs) from the self-test.
Are parking aid Diagnostic Trouble Codes (DTCs) other than B1B44:96, B1B46:96, B1B48:96 or B1B50:96 recorded?

Yes REFER to the appropriate DTC Chart.

No GO to N2

N2 CHECK THE PARKING AID SENSOR DISTANCE PARAMETER IDENTIFICATIONS (PIDS) WITH NO OBJECTS BEHIND THE VEHICLE

NOTE: Make sure the area around the vehicle is clear of anything that can activate the parking aid system.
- Clean the rear bumper and sensors with high-pressure water.
- Make sure the parking aid sensors are flush-mounted in their bezel.
- Ignition ON.
- Using a diagnostic scan tool,
  Access the IPMA and monitor the LRI_DIST (cm) PID
  
  Access the IPMA and monitor the LRO_DIST (cm) PID
  
  Access the IPMA and monitor the RRI_DIST (cm) PID
  
  Access the IPMA and monitor the RRO_DIST (cm) PID
  
  The PID reads 2, 540mm (100in) on a correctly functioning sensor.
Does the PID read 2, 540mm (100in)?

Yes GO to N3

No GO to N4

N3 CHECK THE PARKING AID SENSOR DISTANCE PARAMETER IDENTIFICATIONS (PIDS) WITH A TEST OBJECT BEHIND THE VEHICLE

NOTE: Make sure the area around the vehicle is clear of anything that can activate the parking aid system.
- Using a diagnostic scan tool,
  Access the IPMA and monitor the LRI_DIST (cm) PID
  
  Access the IPMA and monitor the LRO_DIST (cm) PID
  
  Access the IPMA and monitor the RRI_DIST (cm) PID
  
  Access the IPMA and monitor the RRO_DIST (cm) PID
- While monitoring the Parameter Identifications (PIDs), move a test object into and out of the detection zone behind each sensor. For an example of a test object, REFER to: Azimuth System Check .
Does the PID approximately match the distance from the test object to the rear bumper of the vehicle?

Yes GO to N5

No GO to N4

N4 CHECK THE PARKING AID SENSORS
- Ignition OFF.
- Install a known good sensor for the suspect parking aid sensor. REFER to: Rear Parking Aid Sensor .
- Ignition ON.
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs) and repeat the IPMA self-test.
Is the concern still present?

Yes GO to N5

No INSTALL a new rear parking aid sensor. REFER to: Rear Parking Aid Sensor .

N5 CHECK FOR CORRECT IPMA (IMAGE PROCESSING MODULE A) OPERATION

Ignition OFF.

Disconnect and inspect all IPMA connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the IPMA connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPMA. REFER to: Image Processing Module A (IPMA) .

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.