Explorer 4WD V6-4.0L (2009)
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Disconnect all the SJB connectors.
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Check for:
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corrosion
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damaged pins
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pushed-out pins
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Connect all the SJB connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new SJB. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CONNECT all modules. CLEAR
the DTCs. REPEAT the network test with the scan tool.
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Pinpoint Test R: Intermittent No Medium Speed Controller Area Network (MS-CAN)
Communication, One Or More Modules Are Not Respo
Communications Network
Pinpoint Tests
Pinpoint Test R: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not
Responding During Network Test
Normal Operation
An open circuit VDB06 (GY/OG) (MS-CAN +) or VDB07 (VT/OG) (MS-CAN -) may cause intermittent or unreliable communication to all modules on
the Medium Speed Controller Area Network (MS-CAN). The MS-CAN is used for communication between the following modules:
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Accessory Protocol Interface Module (APIM)
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Audio Control Module (ACM)
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Driver Seat Module (DSM)
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HVAC module
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Instrument Cluster (IC)
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Parking Aid Module (PAM)
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Power Running Board (PRB) module
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Rear Entertainment Module (RETM)
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Satellite Digital Audio Receiver System (SDARS) module
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Smart Junction Box (SJB)
In the event that 1 of the 2 network circuits (MS-CAN + or MS-CAN -) becomes open to a module on the network, unreliable network communication to
all modules on the network may result.
This pinpoint test is intended to diagnose the following:
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Wiring, terminals or connectors
PINPOINT TEST R: INTERMITTENT NO MS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING
DURING NETWORK TEST
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint
test. See: Initial Inspection and Diagnostic Overview/Communications Network/Inspection And Verification
NOTE: Various network DTCs will set while disabling modules in this test procedure which will need to be cleared after the diagnostic procedure is
completed.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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