Mustang V8-4.6L (2009)
Communications Network
Pinpoint Tests
Pinpoint Test F: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond To The Scan Tool
Normal Operation
The Satellite Digital Audio Receiver System (SDARS) module communicates with the scan tool through the Medium Speed Controller Area Network
(MS-CAN). Circuits 1847 (WH/OG) (MS-CAN +) and 1848 (PK/OG) (MS-CAN -) provide the network connection to the SDARS module. The SDARS
module shares the MS-CAN with the Smart Junction Box (SJB), the Audio Control Module (ACM) and the Instrument Cluster (IC). Voltage for the
SDARS module is provided by circuit 729 (RD/WH). Ground is provided by circuit 1204 (BK/OG).
This pinpoint test is intended to diagnose the following:
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Fuse
-
Wiring, terminals and connectors
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SDARS module
PINPOINT TEST F: THE SDARS MODULE DOES NOT RESPOND TO THE SCAN TOOL
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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F1 CHECK THE SDARS MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
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Ignition OFF.
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Disconnect: SDARS Module C4344.
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Ignition ON.
-
Measure the voltage between the SDARS module C4344-9, circuit 729 (RD/WH), harness side and ground.
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Is the voltage greater than 10 volts?
Yes
GO to F2.
No
VERIFY the Bussed Electrical Center (BEC) fuse 56 (20A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring Diagrams to
IDENTIFY the possible causes of the short circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
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F2 CHECK THE SDARS MODULE GROUND CIRCUIT FOR AN OPEN
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Ignition OFF.
-
Disconnect: Negative Battery Cable.
-
Measure the resistance between the SDARS module C4344-3, circuit 1204 (BK/OG), harness side and ground.