Pinpoint Test K: B1B50:08, B1B50:31 And B1B50:1F

K1 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PAM (PARKING ASSIST CONTROL MODULE) SELF-TEST

Ignition ON.

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

Check the PAM Diagnostic Trouble Codes (DTCs) from the self-test.

Are Diagnostic Trouble Codes (DTCs) for multiple front parking aid sensors recorded?

Yes

GO to K2

No	* For Diagnostic Trouble Codes (DTCs) B1B50:08, B1B50:31, or B1B50:1F GO to K3 * For all other PAM Diagnostic Trouble Codes (DTCs), REFER to the PAM DTC Chart .

K2 CHECK THE REAR BUMPER WIRING HARNESS
- Inspect the rear bumper wiring harness for opens, shorts, grounds or corrosion.
Is the rear bumper wiring harness OK?

Yes GO to K3

No REPAIR or INSTALL a new rear bumper wiring harness.

K3 CHECK FOR VOLTAGE TO THE SENSOR

Ignition OFF.

Disconnect left rear inner parking aid sensor C4010.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4010-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 9.5 volts?

Yes

GO to K4

No	REPAIR the circuit.

K4 CHECK FOR GROUND AT THE SENSOR

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4010-1	Courtesy of FORD MOTOR COMPANY	C4010-3

Is the voltage greater than 9.5 volts?

Yes

GO to K5

No	REPAIR the circuit.

K5 CHECK THE SENSOR FOR A SHORT TO GROUND

Ignition OFF.

Disconnect PAM C4014A.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4010-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to K6

No	REPAIR the circuit.

K6 CHECK THE SENSOR FOR A SHORT TO POWER

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4010-2	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the affected circuits.

GO to K7

K7 CHECK THE SENSOR FOR A SHORT TO VREF OR SIGNAL RETURN CIRCUITS

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4010-2	Courtesy of FORD MOTOR COMPANY	C4010-1
C4010-2	Courtesy of FORD MOTOR COMPANY	C4010-3

Are the resistances greater than 10, 000 ohms?

Yes

GO to K8

No	REPAIR the affected circuits.

K8 CHECK THE SENSOR CIRCUITS FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4010-1	Courtesy of FORD MOTOR COMPANY	C4014A-3
C4010-2	Courtesy of FORD MOTOR COMPANY	C4014A-6
C4010-3	Courtesy of FORD MOTOR COMPANY	C4014A-10

Are the resistances less than 3 ohms?

Yes

GO to K9

No	REPAIR the affected circuit.

K9 INSTALL A KNOWN GOOD SENSOR
- Connect PAM C4014A.
- Install a known good sensor for the left rear inner parking aid sensor. REFER to: Rear Parking Aid Sensor .
- Ignition ON.
- Using a diagnostic scan tool, clear the PAM Diagnostic Trouble Codes (DTCs) and repeat the self-test.
Is DTC B1B50:08, B1B50:31B or B1B50:1F still present?

Yes GO to K10

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

K10 CHECK FOR CORRECT PAM (PARKING ASSIST CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all PAM 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 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 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 PAM. REFER to: Parking Assist Control Module (PAM) - Short Wheelbase .

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.