F 450 4WD Super Duty V8-6.4L DSL Turbo (2008)
Body Control Systems: Pinpoint Tests
Test A: DTCs B106E, B106F - Solid State Driver Disabled Due to Short Circuit, Module Disabled Due
to External Fault
PINPOINT TEST A: DTCs B106E, B106F - SOLID STATE DRIVER DISABLED DUE TO SHORT CIRCUIT, MODULE DISABLED DUE
TO EXTERNAL FAULT
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 will be set. 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,
B106E will be set along with the DTC relating to the affected circuit. Once the final threshold has been exceeded, the affected output is permanently
disabled, and B106F will be set along with B1342, at which time the SJB must be replaced.
DTC B106E 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 will also set.
DTC B106F sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F will be set with
DTC B1342. 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:
-
Output circuit short to ground or voltage
-
SJB
A1-A2
Test B: DTCs B2048, B2050, B2949, B2A2B, B2A2C, B2A38 - Possible Smart Junction Box (SJB)
Internal Errors
PINPOINT TEST B: DTCS B2048, B2050, B2949, B2A2B, B2A2C, B2A38 - POSSIBLE SMART JUNCTION BOX (SJB) INTERNAL
ERRORS
Normal Operation
If the SJB is not configured correctly, these DTCs may appear in error. The SJB will need to be configured correctly, possibly by entering the As-Built
data, to clear the DTCs. If the SJB is configured correctly, then the following pinpoint test will need to be carried out to determine if the SJB is at
fault.
