Focus L4-2.0L (2009)
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Clear the continuous memory DTCs.
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Carry out the SJB self-test.
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Is DTC B1317 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
The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
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Pinpoint Test C: DTC B1318
Smart Junction Box (SJB)
Pinpoint Tests
Pinpoint Test C: DTC B1318
Refer to Wiring Diagrams Set 13, Power Distribution/SJB for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
The Smart Junction Box (SJB) monitors the voltage from the battery to determine if it goes above or below specific thresholds and sets DTC B1318 in
continuous memory and on-demand if the SJB detects low battery voltage below 10 volts on circuit SBB39 (WH/RD).
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DTC B1318 (Battery Voltage Low) - a continuous memory or an on-demand DTC that sets when the SJB detects battery voltage below 10 volts
on circuit SBB39 (WH/RD).
This pinpoint test is intended to diagnose the following:
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Wiring, terminals or connectors
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High circuit resistance
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SJB
PINPOINT TEST C: DTC B1318
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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C1 RECHECK THE SJB DTCs
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Ignition ON.
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Enter the following diagnostic mode on the scan tool: SJB Self-Test.
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Clear the DTCs. Repeat the SJB self-test.
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Is DTC B1318 still present?
Yes
GO to C2.
No
The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.
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C2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM