Explorer AWD V8-4.6L (2010)
Pinpoint Test L: The Rear Entertainment Module (RETM) Does Not Respond To The Scan Tool
Communications Network
Pinpoint Tests
Pinpoint Test L: The Rear Entertainment Module (RETM) Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
The Rear Entertainment Module (RETM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
RETM
PINPOINT TEST L: THE RETM 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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L1 CHECK THE RETM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
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Ignition OFF.
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Disconnect: RETM C9029.
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Ignition ON.
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Measure the voltage between the RETM C9029-16, circuit SBB41 (RD), harness side and ground.
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Is the voltage greater than 10 volts?
Yes
GO to L2.
No
VERIFY the Battery Junction Box (BJB) fuse 41 (15A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the
possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool. See: Diagrams/Electrical Diagrams/Diagrams By
Number
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L2 CHECK THE RETM GROUND CIRCUIT FOR AN OPEN
-
Ignition OFF.
-
Disconnect: Negative Battery Cable.