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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 642 (Automatic Transmission - 10-Speed Automatic Transmission - 10R80 (DTC Charts 5.0L - Assembly)) >> Diagnosis And Testing >> DTC Chart and Pinpoint Tests - 5.0L 32V Ti-VCT >> Pinpoint Tests >> Pinpoint Test F: Transmission Fluid Auxiliary Pump Performance Diagnostics

Pinpoint Test F: Transmission Fluid Auxiliary Pump Performance Diagnostics

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  1. Refer to Wiring Diagrams TRANSMISSION CONTROLS - 10R80 for schematic and connector information.

    Normal Operation and Fault Conditions 

    The transmission fluid auxiliary pump keeps the transmission fluid circulating and the transmission engaged during auto start-stop events. The transmission fluid auxiliary pump has an internal microprocessor and communicates with the PCM over a PWM circuit with a frequency of 150 Hz with a duty cycle range of 10% to 90%. If the transmission fluid level is low or overfilled or there are any restrictions in the transmission lines, hoses (if vehicle is equipped with external lines or hoses) or cooler it may affect the transmission fluid auxiliary pump operation.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0B0D:00 Electric/Auxiliary Transmission Fluid Pump Motor Control Module: No Sub Type Information This DTC indicates the transmission fluid auxiliary pump communication is OK, the frequency is between 125 Hz and 175 Hz and a valid duty cycle was detected, but the transmission fluid auxiliary pump has detected a pump over or under speed condition. The current flow through the pump was within specification (55% to 60% or 65% to 70% duty cycle).
    PCM P0C27:00 Electric/Auxiliary Transmission Fluid Pump "A" Motor Current Low: No Sub Type Information This DTC indicates the transmission fluid auxiliary pump communication is OK, the frequency is between 125 Hz and 175 Hz, but a low current is detected (10% to 15% duty cycle). Possible causes are a low transmission fluid level or leaking pump seals.
    PCM P175A:00 Transmission Fluid Over Temperature Condition - Electric Transmission Fluid Pump Disabled: No Sub Type Information This DTC sets if the auxiliary pump communication is OK, the frequency is between 130 Hz and 170 Hz, but an over temperature condition is detected (30% to 34% duty cycle). This DTC can be caused by high transmission fluid temperatures.

    Possible Sources 

    • Low transmission fluid level
    • Transmission fluid auxiliary pump seals
    • Transmission fluid auxiliary pump

  2. F1 CHECK THE TRANSMISSION FLUID LEVEL

    Is the transmission fluid level correct? 

    Yes  GO to  F2
    No  CORRECT the transmission fluid to the proper level, clear the DTC and road test the vehicle. If the DTC returns, GO to  F2

  3. F2 CHECK THE PCM (POWERTRAIN CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

    • Using a diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs) from the PCM.

    Is DTC P0B0D, P0C27 and/or P175A present? 

    Yes  For P0B0D, GO to  F3 For P0C27, GO to  F4 For P175A, GO to  F6
    No  The fault is not present at this time.

  4. F3 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) P0B0D

    • Ignition ON.

    • Using a diagnostic scan tool, clear all diagnostic trouble codes (DTCs) from the PCM.

    • Road test the vehicle, making sure the auto start-stop function operates.

    • Using a diagnostic scan tool, carry out the PCM self-test.

    Is DTC P0B0D present? 

    Yes  INSTALL a new transmission fluid auxiliary pump. REFER to: Transmission Fluid Auxiliary Pump .
    No  The fault is not present at this time.

  5. F4 RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) P0C27

    • Using a diagnostic scan tool, clear all diagnostic trouble codes (DTCs) from the PCM.

    • Road test the vehicle, making sure the auto start-stop function operates.

    • Using a diagnostic scan tool, carry out the PCM self-test.

    Is DTC P0C27 present? 

    Yes  GO to  F5
    No  The fault is not present at this time.

  6. F5 CHECK THE TRANSMISSION FLUID AUXILIARY PUMP SEALS

    • Remove the transmission fluid auxiliary pump tube and inspect the seals.

    Are the transmission fluid auxiliary pump seals OK? 

    Yes  INSTALL a new transmission fluid auxiliary pump. REFER to: Transmission Fluid Auxiliary Pump .
    No  INSTALL new seals on the transmission fluid auxiliary pump tube. REFER to: Transmission Fluid Auxiliary Pump .

  7. F6 CHECK FOR TRANSMISSION OVER TEMPERATURE DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

    • Using a diagnostic scan tool, retrieve all continuous memory diagnostic trouble codes (CMDTCs) from the PCM.

    Is DTC P0218 and/or P1783 present? 

    Yes  RESOLVE those DTCs first. REFER to DTC Chart and Pinpoint Tests - 5.0L 32V Ti-VCT .
    No  GO to  F7

  8. F7 RECHECK FOR DTC P175A

    • Allow the transmission to cool.

    • Ignition ON.

    • Using a diagnostic scan tool, clear all diagnostic trouble codes (DTCs) from the PCM.

    • Road test the vehicle, making sure the transmission reaches operating temperature and the auto start-stop function operates.

    • Using a diagnostic scan tool, carry out the PCM self-test.

    Is DTC P175A present? 

    Yes  INSTALL a new transmission fluid auxiliary pump. REFER to: Transmission Fluid Auxiliary Pump .
    No  The fault is not present at this time. It may have been caused by a previous extreme operating condition.
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