Pinpoint Test A: DTCs B106E, B106F

Smart Junction Box (SJB)

Pinpoint Tests

Pinpoint Test A: DTCs B106E, B106F

Normal Operation

The Smart Junction Box (SJB) controls the output of the Daytime Running Lamps (DRL), fog lamps, one-touch down driver power window, accessory delay relay, windshield wiper park/run, windshield wiper speed, and windshield washer. When a repetitive fault causing a circuit overload is detected on any of the output circuits, the SJB disables the circuit by removing voltage or ground, to the affected circuit. The circuit remains disabled until the fault is corrected and an on-demand self-test is run. After the on-demand self-test has been run, any DTCs related to the fault are cleared.

- DTC B106E (Solid State Driver Disabled Due to Short Circuit) - a continuous memory and on-demand DTC that sets when the SJB has temporarily disabled a circuit due to a repetitive fault causing a circuit overload. A corresponding DTC for the circuit in question also sets as follows:
- DTC B106F (Module Disabled Due to External Fault) - a continuous memory and on-demand DTC that sets when one or more output functions are permanently disabled due to a repetitive circuit overload fault. DTC B106F sets with DTC B106E. When DTC B106F is present, the SJB must be replaced after the fault condition has been corrected.
- DTC B1304 (Accessory Delay Relay Coil Circuit Short to Battery) - Accessory delay relay circuit short to battery voltage
- DTC B2512 (Front Fog Lamp Relay Ckt Short to Battery) - Fog lamp relay circuit short to battery voltage
- DTC B2973 (Daytime Running Lamp Output Shorted to Ground) - DRL output short to ground

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 being replaced, the fault condition must be corrected first. Failure to correct the fault condition first causes 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.
- Are only DTC B106E and DTC B106F present?

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

No
CORRECT any DTCs present other than DTC B106E and DTC B106F. 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 DTC B106F present?

Yes
INSTALL a new SJB. Refer to Smart Junction Box (SJB) Service and Repair. 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.

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