Explorer Sport Trac 2WD V6-4.0L (2009)
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4X4 control module
PINPOINT TEST E: THE 4X4 CONTROL 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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E1 CHECK THE 4X4 CONTROL MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
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Ignition OFF.
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Disconnect: 4X4 Control Module C281a.
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Disconnect: 4X4 Control Module C281b.
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Ignition ON.
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Measure the voltage between the 4X4 control module, harness side and ground as follows:
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Are the voltages greater than 10 volts?
Yes
GO to E2.
No
VERIFY the Battery Junction Box (BJB) fuse 23 (20A) or fuse 26 (20A) is OK and the Smart Junction Box (SJB) fuse 18 (10A) is OK. If OK, REPAIR
the circuit in question. 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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E2 CHECK THE 4X4 CONTROL MODULE GROUND CIRCUITS FOR AN OPEN
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Ignition OFF.
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Disconnect: Negative Battery Cable.
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Measure the resistance between the 4X4 control module, harness side and ground as follows:
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Are the resistances less than 5 ohms?
Yes
GO to E3.
No
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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E3 CHECK THE HS-CAN CIRCUITS BETWEEN THE 4X4 CONTROL MODULE AND THE DLC FOR AN OPEN
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Measure the resistance between the 4X4 control module C281a-10, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04
(WH/BU), harness side.
