PINPOINT TEST E : The IPC 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 .

E1 VERIFY EQUIPMENT - IPC LEVEL
- Verify which IPC is equipped on the vehicle.
Is the vehicle equipped with a base level IPC ?

Yes GO to E4.

No GO to E2.

E2 CHECK THE I-CAN TERMINATION RESISTANCE

Ignition OFF.

Disconnect the diagnostic scan tool cable from the DLC.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C251-1	Courtesy of FORD MOTOR COMPANY	C251-9

Is the resistance between 54 and 66 ohms?

Yes	GO to E4.
No	GO to E3.

E3 CHECK THE I-CAN CIRCUITS BETWEEN THE IPC AND THE DLC FOR AN OPEN

Measure:

Mid-Level IPC

Positive Lead	Measurement / Action	Negative Lead
C220-12	Courtesy of FORD MOTOR COMPANY	C251-1
C220-13	Courtesy of FORD MOTOR COMPANY	C251-9

High-Level IPC

Positive Lead	Measurement / Action	Negative Lead
C220-25	Courtesy of FORD MOTOR COMPANY	C251-1
C220-26	Courtesy of FORD MOTOR COMPANY	C251-9

Are the resistances less than 3 ohms?

Yes	CONNECT the negative battery cable. GO to E7.
No	REPAIR the circuit in question. CONNECT the negative battery cable.

E4 CHECK THE IPC VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Disconnect: IPC C220 .

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C220-21	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to E5.
No	VERIFY the BCM fuse 23 (15A) 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.

E5 CHECK THE IPC GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: Negative Battery Cable.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C220-5	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances less than 3 ohms?

Yes	GO to E6.
No	REPAIR the circuit.

E6 CHECK THE HS-CAN CIRCUITS BETWEEN THE IPC AND THE DLC FOR AN OPEN

Measure:

Base, Mid-Level IPC

Positive Lead	Measurement / Action	Negative Lead
C220-25	Courtesy of FORD MOTOR COMPANY	C251-6
C220-26	Courtesy of FORD MOTOR COMPANY	C251-14

High-Level IPC

Positive Lead	Measurement / Action	Negative Lead
C220-12	Courtesy of FORD MOTOR COMPANY	C251-6
C220-13	Courtesy of FORD MOTOR COMPANY	C251-14

Are the resistances less than 3 ohms?

Yes	CONNECT the negative battery cable. GO to E7.
No	REPAIR the circuit in question. CONNECT the negative battery cable.

E7 CHECK FOR CORRECT IPC OPERATION

Ignition OFF.

Disconnect and inspect the IPC 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 IPC 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, Refer to IPC Hardware Testing .
No	The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.