PINPOINT TEST K : The ACM Does Not Respond To The Scan Tool

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

K1 CHECK THE I-CAN TERMINATION RESISTANCE

Ignition OFF.

Disconnect: Negative Battery Cable.

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 K3.
No	GO to K2.

K2 CHECK THE I-CAN TERMINATION RESISTANCE WITH THE ACM DISCONNECTED

Disconnect: ACM C240A.

Measure:

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

Is the resistance between 108 and 132 ohms?

Yes	GO to K5.
No	GO to Pinpoint Test H .

K3 CHECK THE ACM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition OFF.

Connect: Negative Battery Cable.

Disconnect: ACM C240A.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C240A-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to K4.
No	VERIFY the BCM fuse 29 (20A) 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.

K4 CHECK THE ACM GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: Negative Battery Cable.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C240A-13	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	CONNECT the negative battery cable. GO to K8.
No	REPAIR the circuit.

K5 CHECK THE I-CAN CIRCUITS BETWEEN THE ACM AND THE IPC FOR AN OPEN

Disconnect: IPC.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C240A-14	Courtesy of FORD MOTOR COMPANY	C220-25
C240A-15	Courtesy of FORD MOTOR COMPANY	C220-26

Are the resistances less than 3 ohms?

Yes	GO to K6.
No	REPAIR the circuit in question.

K6 CHECK THE I-CAN CIRCUITS FOR A SHORT TO POWER

Connect: ACM C240A.

Connect: Negative Battery Cable.

Ignition ON.

Measure:

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

Is the voltage greater than 3 volts on either circuit?

Yes	REPAIR the circuit in question.
No	GO to K7.

K7 CHECK THE I-CAN CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: Negative Battery Cable.

Measure:

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

Are the resistances greater than 10, 000 ohms?

Yes	CONNECT the negative battery cable. GO to K8.
No	REPAIR the circuit in question.

K8 CHECK FOR CORRECT ACM OPERATION

Ignition OFF.

Disconnect and inspect the ACM connectors 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 ACM connectors 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 ACM. REFER to Information and Entertainment Systems Premium (Premium), REFER to Information and Entertainment Systems Premium Plus (Premium Plus) or REFER to Information and Entertainment Systems Sony Sound (Sony ® Sound).
No	The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.