PINPOINT TEST T : The PAM Does Not Respond To The Diagnostic Scan Tool

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.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery, Mounting and Cables .

T1 CHECK THE PAM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: PAM C4014A .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4014A-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to T2.
No	VERIFY the BCM fuse 34 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.

T2 CHECK THE PAM GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: Negative Battery Cable.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4014A-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	GO to T3.
No	REPAIR the circuit.

T3 CHECK THE HS-CAN CIRCUITS BETWEEN THE PAM AND THE DLC FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C4014A-3	Courtesy of FORD MOTOR COMPANY	C251-6
C4014A-11	Courtesy of FORD MOTOR COMPANY	C251-14

Are the resistances less than 3 ohms?

Yes	CONNECT the negative battery cable. GO to T4.
No	REPAIR the circuit in question. CONNECT the negative battery cable.

T4 CHECK FOR CORRECT PAM OPERATION

Ignition OFF.

Disconnect and inspect the PAM connector and related in-line connectors.

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

Reconnect the PAM connector and related in-line connectors. Make sure they seat and latch correctly.

Operate the system and verify 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 .
No	The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.