Explorer Sport Trac 2WD V6-4.0L (2009)
Communications Network
Pinpoint Tests
Pinpoint Test N: The Power Running Board Module 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
Normal Operation
The Power Running Board (PRB) module communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN). Circuits
VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the PRB module. Voltage for the PRB module is
provided by circuit SBB19 (BU/RD). Circuit GD151 (BK/GN) provides ground.
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
PRB module
PINPOINT TEST N: THE PRB 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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N1 CHECK THE PRB MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
-
Ignition OFF.
-
Disconnect: PRB Module C4322b.
-
Ignition ON.
-
Measure the voltage between the PRB module C4322b-1, circuit SBB19 (BU/RD), harness side and ground.
-
Is the voltage greater than 10 volts?
Yes
GO to N2.
No
VERIFY the Battery Junction Box (BJB) fuse 19 (30A) 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.
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N2 CHECK THE PRB MODULE GROUND CIRCUIT FOR AN OPEN
-
Ignition OFF.
-
Disconnect: Negative Battery Cable.
-
Measure the resistance between the PRB module C4322b-4, circuit GD151 (BK/GN), harness side and ground.