Expedition 2WD V8-5.4L (2009)
Pinpoint Tests
Pinpoint Test D: DTC B1318
Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm 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 if the SJB detects low battery voltage below 10 volts on circuit SDC04 (RD).
-
DTC B1318 (Battery Voltage Low) - a continuous memory DTC that sets when the SJB detects battery voltage below 10 volts on circuit SDC04
(RD).
This pinpoint test is intended to diagnose the following:
-
Wiring, terminals or connectors
-
High circuit resistance
-
SJB
PINPOINT TEST D: 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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D1 RECHECK THE SJB DTCs
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Ignition ON.
-
Enter the following diagnostic mode on the scan tool: SJB Self-Test.
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Clear the DTCs. Repeat the SJB self-test.
-
Is DTC B1318 still present?
Yes
GO to D2.
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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D2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM
-
Enter the following diagnostic mode on the scan tool: PCM Self-Test.
-
Retrieve the continuous memory DTCs from the PCM.
-
Is DTC P0620, P0625, P0626 or P065B set in the PCM?
Yes
REFER to Charging System.
No
GO to D3.
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D3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
-
Ignition OFF.
-
Check the battery condition and verify the battery is fully charged. Refer to Battery, Battery Condition Test. See: Starting and
Charging/Battery/Testing and Inspection/Pinpoint Tests
