F 150 4WD V8-4.6L VIN 8 (2010)
Repair.
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Pinpoint Test F: DTCs B106E, B106F
Smart Junction Box (SJB)
Pinpoint Tests
Pinpoint Test F: DTCs B106E, B106F
Normal Operation
The Smart Junction Box (SJB) controls the output of several vehicle systems by means of solid state drivers. When an overload occurs on any of these
drivers, a DTC sets. The module also tracks the number of repetitive faults on each of these circuits. The module compares this number of overloads to 3
progressive thresholds established for each circuit. If the 3 thresholds have not been exceeded, then the DTC of the affected circuit can be cleared by
eliminating the fault, then clearing the DTCs and running the self-test. At the point that each of the first 2 thresholds are exceeded, DTC B106E sets
along with the DTC relating to the affected circuit. Once the final threshold has been exceeded, the affected output is permanently disabled, and DTC
B106F sets along with DTC B1342, at which time the SJB must be replaced.
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DTC B106E (Solid State Driver Disabled Due to Short Circuit) - sets when the SJB has disabled a circuit due to a repetitive fault causing a circuit
overload. A corresponding DTC for the circuit in question also sets.
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DTC B106F (Module Disabled Due to External Fault) - sets when one or more output functions are permanently disabled due to a repetitive circuit
overload fault. DTC B106F sets along with DTC B106E. When DTC B106F is present, a new SJB must be installed after the fault condition has
been corrected.
This pinpoint test is intended to diagnose the following:
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Output circuit short to ground or voltage
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SJB
PINPOINT TEST F: DTCs B106E, B106F
NOTICE: If DTC B106F is present and a new Smart Junction Box (SJB) is being installed, the fault condition must be corrected first. Failure
to correct the fault condition first may cause damage to the new SJB, resulting in a repeat repair.
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F1 REVIEW THE DTCs
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Review the DTCs from the SJB self-test.
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Are only DTCs B106E and B106F present?
Yes
INSTALL a new SJB. REFER to Smart Junction Box (SJB) See: Power and Ground Distribution/Power Distribution Module/Service and Repair. TEST
the system for normal operation.
No
CORRECT any DTCs present other than DTCs B106E and B106F. REFER to DTC Charts. After the repair, GO to F2. See: Diagnostic Trouble Code
Descriptions/Smart Junction Box (SJB)
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F2 CARRY OUT THE SJB SELF-TEST
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Carry out the SJB self-test.
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Is DTC B106F present?