Pinpoint Test A: DTCs B106E, B106F

Smart Junction Box (SJB)

Pinpoint Test A: 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 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, 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 DTCs B1342 and B106E, at which time the SJB must be replaced.

- DTC B106E (Solid State Driver Disabled Due to Short Circuit) - a continuous DTC that 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 (Module Disabled Due to External Fault) - a continuous DTC that sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F sets along with DTC B1342 and 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:

- Output circuit short to ground or voltage
- SJB



PINPOINT TEST A: DTCs B106E, B106F

NOTICE: If DTC B106F is present and the Smart Junction Box (SJB) is to be replaced, 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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A1 REVIEW THE DTCs


- Review the DTCs from the SJB self-test.
- Is only DTC B106F present?

Yes
INSTALL a new SJB. REFER to Smart Junction Box (SJB) Smart Junction Box (SJB). TEST the system for normal operation.

No
CORRECT any DTCs present other than DTC B106E (DTC B106F may also be present). REFER to Diagnostic Trouble Code (DTC) Chart Diagnostic Trouble Code (DTC) Chart. After the repair, GO to A2.

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A2 CARRY OUT THE SJB SELF-TEST


- Carry out the SJB self-test.
- Is only DTC B106F present?

Yes
INSTALL a new SJB. REFER to Smart Junction Box (SJB) Smart Junction Box (SJB). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern was caused by a fault in one of the output circuits, which is no longer present.

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