Escape 4WD L4-2.5L (2010)
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Measure the resistance between DC/DC converter C1457D-(-), circuit HYT04 (OG), harness side, and TCM C1458E-(-), circuit HYT04 (OG),
harness side.
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Are the resistances less than 5 ohms?
Yes
GO to D12.
No
INSTALL a new DC/DC converter wiring harness. REFER to Direct Current/Direct Current (DC/DC) Converter Wiring Harness . CLEAR the DTCs.
REPEAT the self-test.
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D12 CHECK THE DC/DC CONVERTER FOR AN OVER-CHARGING CONDITION
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Connect: DC/DC Converter C1457D.
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Connect: TCM C1458E.
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Disconnect: DC/DC Converter C1457A.
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Repower the HVTB system. Refer to the general procedure in Hybrid Drive Systems.
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Ignition ON.
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Measure the battery voltage and record.
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Is the voltage less than 16 volts?
Yes
GO to D13.
No
INSTALL a new DC/DC converter. REFER to Direct Current/Direct Current (DC/DC) Converter . CLEAR the DTCs. REPEAT the self-test.
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D13 VERIFY CORRECT DC/DC CONVERTER OPERATION
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Ignition OFF.
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Measure the battery voltage and compare it to the value recorded in step D12.
