PINPOINT TEST U : The C-CM 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

U1 CHECK THE C-CM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1582-10	Courtesy of FORD MOTOR COMPANY	Ground
C1582-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to U2.
No	VERIFY the BJB fuses 79 (5A) and 91 (10A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

U2 CHECK THE C-CM GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1582-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	GO to U3.
No	REPAIR the circuit.

U3 CHECK THE HS-CAN CIRCUITS BETWEEN THE C-CM AND THE DLC FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1582-8	Courtesy of FORD MOTOR COMPANY	C251-6
C1582-7	Courtesy of FORD MOTOR COMPANY	C251-14

Are the resistances less than 3 ohms?

Yes	CONNECT the negative battery cable. GO to U4.
No	REPAIR the circuit in question.

U4 CHECK FOR CORRECT C-CM OPERATION

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 C-CM connector and related in-line connectors. Make sure they seat and latch correctly.

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 C-CM. REFER to Cruise Control Adaptive .
No	The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.