Fusion FWD L4-2.5L Hybrid (2010)
becoming drained. Reduced or no functionality of 12-volt systems (headlamps, HVAC blower motor, etc.) may also be noticed.
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DTC P0AFB:17 (Hybrid Battery System Voltage High: Circuit Voltage Above Threshold) - Sets when the DC/DC senses HVTB voltage of
greater than 360 volts.
This pinpoint test is intended to diagnose the following:
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HVTB system fault
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High-voltage cables
PINPOINT TEST F: DTC P0AFB:17
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F1 CHECK THE TCM AND AIR CONDITIONING COMPRESSOR MODULE FOR HIGH VOLTAGE OVER-VOLTAGE DTCs
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Ignition ON.
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Connect the scan tool.
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Enter the following diagnostic mode on the scan tool: Self Test - TCM, and record the results.
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Enter the following diagnostic mode on the scan tool: Self Test - ACCM.
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Is Transmission Control Module (TCM) DTC P0A78:17, P0A7A:17, P1A07:16, P0A07:62 and/or Air Conditioning Compressor Module
(ACCM) DTC P0AFB:17 present?
Yes
GO to F2.
No
DEPOWER the HVTB. REFER to Hybrid Drive Systems. INSPECT the high-voltage cable ends for arcing or terminal pull out. REPAIR as necessary.
CLEAR the DTC. REPEAT the self-test. TEST the system for normal operation.
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F2 CHECK HIGH VOLTAGE TO THE DC/DC USING PID HEV HIGH VOLTAGE BUS-MEASURED (HEVHiVolt)
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Enter the following diagnostic mode on the scan tool: DataLogger - DC/DC.
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Monitor the DC/DC PID HEVHiVolt.
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Does the PID read less than 360 volts?
Yes
CARRY OUT self-test of the Battery Energy Control Module (BECM). REFER to Hybrid Drive Systems for further diagnosis of the BECM DTCs.
CLEAR the DTC. REPEAT the self-test. TEST the system for normal operation.
No
DEPOWER the HVTB. REFER to Hybrid Drive Systems. INSPECT the high-voltage cable ends for arcing or terminal pull out. REPAIR as necessary.
CLEAR the DTC. REPEAT the self-test. TEST the system for normal operation.
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Pinpoint Test G: DTC U0300:00
High-Voltage Converter/Inverter
Pinpoint Tests