Pinpoint Test D : DTC B1B44:96, B1B46:96, B1B48:96 Or B1B50:96

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK THE PAM DTCs

Using a diagnostic scan tool, perform the PAM self-test.

Are parking aid DTCs other than B1B44:96, B1B46:96, B1B48:96 or B1B50:96 recorded?

Yes	DIAGNOSE the other DTCs first. REFER to the Parking Aid Module (PAM) DTC Chart .
No	GO to D2.

D2 CHECK THE PARKING AID SENSOR OPERATION

NOTE: Make sure the area around the vehicle is clear of anything that might activate the parking aid system.

Clean the bumper and sensors with high-pressure water.

Carry out the azimuth system check. Refer to Azimuth System Check .

Carry out the elevation system check. Refer to Elevation System Check .

Does the parking aid system pass both system checks?

Yes	The system is operating correctly at this time. The concern may have been caused by a dirty or blocked parking aid sensor.
No	GO to D3.

D3 CHECK THE REAR PARKING AID SENSOR DISTANCE PIDs
- Make sure the suspect parking aid sensor(s) is flush-mounted in the bezel.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Parking Aid PID.
- With the brake pedal applied, shift the transmission into REVERSE (R) and monitor the parking aid sensor distance PID. The PID reads 255 cm (8.4 ft) on a correctly functioning sensor.
Does the PID read 255 cm (8.4 ft)?

Yes GO to D4.

No GO to D5.

D4 CHECK THE PARKING AID SENSOR ATTENUATION PIDs
- Check the parking aid sensor attenuation PIDs.
Do all of the attenuation PIDs read between 0 and 16 ms?

Yes GO to D6.

No GO to D5.

D5 INSTALL A KNOWN GOOD SENSOR

Install a known good sensor for the suspect parking aid sensor. Refer to Parking Aid Sensor - Rear

Ignition ON.

Using a diagnostic scan tool, clear the PAM DTCs and repeat the self-test.

Is the concern still present?

Yes	GO to D6.
No	INSTALL a new parking aid sensor. REFER to Parking Aid Sensor - Rear .

D6 CHECK FOR CORRECT PAM OPERATION

Disconnect and inspect the PAM connectors.

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

Reconnect the PAM 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new PAM. REFER to Parking Aid Module (PAM) .
No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

Yes	GO to D4.
No	GO to D5.