ford Workshop Repair Guides

Ford Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 6973 > < Initial Inspection and Diagnostic Overview|Page 6971
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G2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM

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Enter the following diagnostic mode on the scan tool: PCM Self-Test.

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Retrieve the continuous memory DTCs from the PCM.

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Is DTC P0620, P0625, P0626 or P065B set in the PCM?

Yes

REFER to Charging System.

No

GO to G3.

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G3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE

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Ignition OFF.

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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

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Is the battery OK and fully charged?

Yes

GO to G4.

No

REFER to Charging System.

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G4 CHECK THE DSM VOLTAGE SUPPLY

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Measure and record the voltage at the battery.

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Disconnect: DSM C341A.

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Ignition ON.

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Measure the voltage between the DSM C341A-2, circuit SBB14 (BN/RD), harness side and ground.

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Is the voltage within 0.2 volt of the recorded battery voltage?

Yes

GO to G5.

No

REPAIR the circuit for high resistance. CLEAR the DTC. REPEAT the self-test.

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G5 CHECK THE DSM GROUND CIRCUIT

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Ignition OFF.

-

Disconnect: Negative Battery Cable.

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Disconnect: DSM C341C.

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Measure the resistance between the DSM C341C-13, circuit GD143 (BK/VT), harness side and ground.

Initial Inspection and Diagnostic Overview|Page 6973 > < Initial Inspection and Diagnostic Overview|Page 6971