Pinpoint Test B: DTCs B106E and B106F

Seats

Pinpoint Test B: DTCs B106E and B106F

Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

The Driver Seat Module (DSM) controls the output of several vehicle systems by means of solid state drivers. When an overload occurs on any of these drivers, a DTC is 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 is 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 is set along with B1342, at which time the DSM (Driver Seat Module) must be replaced.

- DTC B106E (Solid State Driver Disabled Due To Short Circuit)- sets when the DSM (Driver Seat Module) has disabled a circuit due to a repetitive fault causing a circuit overload. A corresponding DTC for the circuit in question is also set.

- 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 is set with DTC B1342. When DTC B106F is present, a new DSM (Driver Seat Module) 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

- DSM (Driver Seat Module)

PINPOINT TEST B : DTCs B106E, B106F

NOTICE: If DTC B106F is present, the fault condition must be corrected prior to installing a new DSM (Driver Seat Module). Failure to correct the fault condition first may cause damage to the new DSM (Driver Seat Module) , resulting in a repeat repair.

B1 REVIEW THE DTCs

- Review the DTCs from the DSM (Driver Seat Module) self-test.

Are DTCs B106F and B1342 present?

Yes
CORRECT the cause of any other DTCs present. When the other DTCs are corrected, INSTALL a new DSM (Driver Seat Module). REFER to Driver Seat Module (DSM) . TEST the system for normal operation.

No
GO to B2.

B2 REPAIR OTHER DTCs

- Repair the cause of any DTCs present, other than DTC B106E. Refer to DTC Charts. Seats

- Clear the DTCs.

- Carry out the DSM (Driver Seat Module) self-test.

Is DTC B106E still present?

Yes
The fault causing the output state to be disabled is still present. REPAIR the cause of the concern. CLEAR the DTCs. REPEAT the self-test.

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