Pinpoint Test N : The Left Or Right Speakers Are Inoperative When Using The Cd (Compact Disc) Player Input

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.

Audio System/Navigation - AM/FM/CD/SYNC for schematic and connector information.
Normal Operation and Fault Conditions

Possible Sources
- Wiring, terminals, or connectors
- GFM
- ACM

N1 CHECK THE OPERATION OF THE SPEAKERS USING THE AM (AMPLITUDE MODULATION) / FM (FREQUENCY MODULATION) MODE
- Ignition ON.
- Operate the audio system in AM/ FM mode.
- Using the audio system fade and balance features, adjust the audio sound to each of the four zones (left front, right front, left rear and right rear).
Do all of the speakers operate?

Yes GO to N2

No GO to Pinpoint Test G

N2 CHECK THE GFM (GENERIC FUNCTION MODULE) OUTPUT CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect ACM C240A.

Disconnect GFM C2611.

Ignition ON.

Measure:

Stereo Left

Positive Lead	Measurement / Action	Negative Lead
Refer to C2611-8	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C2611-9	Courtesy of FORD MOTOR COMPANY	Ground

Stereo Right

Positive Lead	Measurement / Action	Negative Lead
Refer to C2611-3	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C2611-4	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit in question.

GO to N3

N3 CHECK THE APIM (SYNC MODULE) OUTPUT CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Stereo Left

Positive Lead	Measurement / Action	Negative Lead
Refer to C2611-8	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C2611-9	Courtesy of FORD MOTOR COMPANY	Ground

Stereo Right

Positive Lead	Measurement / Action	Negative Lead
Refer to C2611-3	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C2611-4	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to N4

No	REPAIR the circuit in question.

N4 CHECK THE APIM (SYNC MODULE) OUTPUT CIRCUITS FOR A SHORT TOGETHER

Measure:

Stereo Left or Right

Positive Lead	Measurement / Action	Negative Lead
Refer to C2611-8	Courtesy of FORD MOTOR COMPANY	Refer to C2611-9
Refer to C2611-8	Courtesy of FORD MOTOR COMPANY	Refer to C2611-3
Refer to C2611-8	Courtesy of FORD MOTOR COMPANY	Refer to C2611-4
Refer to C2611-8	Courtesy of FORD MOTOR COMPANY	Refer to C2611-5
Refer to C2611-9	Courtesy of FORD MOTOR COMPANY	Refer to C2611-3
Refer to C2611-9	Courtesy of FORD MOTOR COMPANY	Refer to C2611-4
Refer to C2611-9	Courtesy of FORD MOTOR COMPANY	Refer to C2611-5
Refer to C2611-3	Courtesy of FORD MOTOR COMPANY	Refer to C2611-4
Refer to C2611-3	Courtesy of FORD MOTOR COMPANY	Refer to C2611-5
Refer to C2611-4	Courtesy of FORD MOTOR COMPANY	Refer to C2611-5

Are the resistances greater than 10, 000 ohms?

Yes

GO to N5

No	REPAIR the circuits in question.

N5 CHECK THE APIM (SYNC MODULE) OUTPUT CIRCUITS FOR AN OPEN

Measure:

Stereo Left

Positive Lead	Measurement / Action	Negative Lead
Refer to C2611-8	Courtesy of FORD MOTOR COMPANY	Refer to C240A-16
Refer to C2611-9	Courtesy of FORD MOTOR COMPANY	Refer to C240A-27

Stereo Right

Positive Lead	Measurement / Action	Negative Lead
Refer to C2611-3	Courtesy of FORD MOTOR COMPANY	Refer to C240A-17
Refer to C2611-4	Courtesy of FORD MOTOR COMPANY	Refer to C240A-28

Are the resistances less than 3 ohms?

Yes

GO to N6

No	REPAIR the circuit in question.

N6 CHECK FOR CORRECT GFM (GENERIC FUNCTION MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all the GFM connector.

Repair:
- corrosion (install new connectors or terminals - clean module pins)
- damaged or bent pins - install new terminals pins
- pushed-out pins - install new pins as necessary

Reconnect the GFM connector. Make sure it seats and latches 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 GFM. TEST the system for normal operation. If the concern is still present, GO to N7

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

N7 CHECK FOR CORRECT ACM (AUDIO FRONT CONTROL MODULE) OPERATION

Disconnect and inspect all the ACM connectors.

Repair:
- corrosion (install new connectors or terminals - clean module pins)
- damaged or bent pins - install new terminals pins
- pushed-out pins - install new pins as necessary

Reconnect the ACM 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 ACM. REFER to: Audio Front Control Module (ACM) .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.