Ranger 4WD V6-4.0L (2009)
Body Control Systems: Pinpoint Tests
Pinpoint Test A: DTC B106E
Smart Junction Box (SJB)
Pinpoint Tests
Pinpoint Test A: DTC B106E
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 will be cleared.
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DTC B106E (Solid State Driver Disabled Due to Short Circuit) - 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 will also set as follows:
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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 will be set with DTC B106E. When DTC B106F is present, the SJB must be replaced after the fault
condition has been corrected.
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DTC B1304 (Accessory Delay Relay Coil Circuit Short to Battery) - Accessory delay relay circuit short to battery voltage
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DTC B2512 (Front Fog Lamp Relay Ckt Short to Battery) - Fog lamp relay circuit short to battery voltage
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DTC B2973 (Daytime Running Lamp Output Shorted to Ground) - DRL output short to ground
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 A: DTC B106E
NOTICE: If DTC B106F is present and the SJB is to be replaced, the fault condition must be corrected first. Failure to correct the fault
condition first will cause damage to the new SJB, resulting in a repeat repair.
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A1 REVIEW THE DTCs
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Review the DTCs from the SJB self-test.
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Are only DTC B106E and DTC 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 DTC B106E and DTC B106F. REFER to Diagnostic Trouble Code (DTC) Chart See: Diagnostic Trouble
Code Descriptions/Diagnostic Trouble Code (DTC) Chart. After the repair, GO to A2.
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A2 CARRY OUT THE SJB SELF-TEST
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Carry out the SJB self-test.
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Is DTC 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
