Fusion FWD L4-2.5L Hybrid (2010)
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Measure the voltage between DC/DC C1457B, B+ terminal and ground.
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Start the engine.
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Measure the voltage between DC/DC C1457B, B+ terminal and ground.
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Did the voltage increase with the ignition ON?
Yes
GO to A3.
No
GO to A2.
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A2 CHECK THE DC TO DC VOLTAGE CONVERTER STATUS (EnableStat) PID
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Connect the scan tool.
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Enter the following diagnostic mode on the scan tool: DataLogger - DC/DC.
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Monitor the EnableStat PID.
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Does the PID read Enable?
Yes
GO to A4.
No
CARRY OUT self-test of the PCM and Battery Energy Control Module (BECM). REFER to Computers and Control Systems Information and Hybrid
Drive Systems for further diagnosis.
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A3 CHECK THE PCM RELAY CONTROL INPUT TO THE DC/DC
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Ignition OFF.
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Disconnect: DC/DC C1457D.
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Start the engine.
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Measure the voltage between DC/DC C1457D-7, circuit CBK03 (GY), harness side and ground.