Pinpoint Test M : DTCS P0C2A:00, P0C2C:00, P0C2D:00, P0C2E:00, P2796:00

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.

Refer to TRANSMISSION CONTROLS for schematic and connector information.

Normal Operation and Fault Conditions

The electronic transmission fluid auxiliary pump is used to keep the transmission engaged when the engine is stopped and the transmission is in drive. The electronic 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%.

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 sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz and a valid duty cycle was detected (54% to 61% or 64% to 71%). The transmission fluid auxiliary pump has detected a pump over or under speed condition. The current flow through the pump was within specification.
PCM P0C27:00	Electric/Auxiliary Transmission Fluid Pump "A" Motor Current Low: No Sub Type Information	This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but a low current is detected (10% to 15% duty cycle).
PCM P0C28:00	Electric/Auxiliary Transmission Fluid Pump "A" Motor Current High: No Sub Type Information	This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but a low current is detected (20% to 25% duty cycle).
PCM P0C29:00	Electric/Auxiliary Transmission Fluid Pump "A" Driver Circuit Performance: No Sub Type Information	This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but a high current is detected.
PCM P0C2A:00	Electric/Auxiliary Transmission Fluid Pump "A" Motor Stalled: No Sub Type Information	This DTC sets if the PCM commands the electric transmission fluid pump motor on and does not detect a corresponding increase in pump pressure, indicating a stalled pump motor.
PCM P0C2C:00	Electric Transmission Fluid Pump Control Module Feedback Signal Range/Performance: No Sub Type Information	This DTC sets if the E-pump communication is OK. The frequency is between 130 Hz and 170 Hz but the duty cycle does not match one of the defined duty cycle ranges.
PCM P0C2D:00	Electric Transmission Fluid Pump Control Module Feedback Signal Low: No Sub Type Information	his DTC sets if the duty cycle is less than 10%.
PCM P0C2E:00	Electric Transmission Fluid Pump Control Module Feedback Signal High: No Sub Type Information	This DTC sets if the duty cycle is greater than 90%.
PCM P2796:00	Electric Transmission Fluid Pump Control Circuit: No Sub Type Information	This DTC sets when the E-pump is not receiving a signal on it's PWM input signal from the PCM.

Possible Sources

Connectors damaged or pushed-out terminals, corrosion, loose wires or ground and missing or damaged seals
Fuse
Transmission fluid auxiliary pump
PCM

Visual Inspection and Pre-checks

Verify BJB fuse 49 is OK
Verify BJB fuse 57 is OK

M1 RETRIEVE AND RECORD ALL DTCS

Refer to the following table for DTC duty cycle ranges.

DTC	Duty Cycle Range	Description
P0C2D	Less than 10%	Out of range Low
P0C27	10% to 15%	Pump current too Low, Speed OK
P0C28	19% to 26%	Pump Current Too High, Speed OK
P175A	29% to 35%	Pump Over Temperature
P0C2A	35% to 41%	Pump Stalled
NONE	44% to 51%	EVERYTHING IS OK - NORMAL VALUE OF SIGNAL
P0B0D	54% to 61%	Pump Over Speed - current OK
P0B0D	64% to 71%	Pump Under Speed - current OK
P0C29	74% to 81%	Both Current and Speed out of range
P2796	84% to 90%	No Command received from Control Module
P0C2E	Greater than 90%	Duty Cycle Out of range HI - undefined
P0C2C	Any other value (between)	Undefined duty cycle

Using the diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs).

Are diagnostic trouble codes (DTCs) P0C2A:00, P0C2C:00, P0C2D:00, P0C2E:00, P2796:00 present?

Yes	For DTC P2796, GO to M7 For all other diagnostic trouble codes (DTCs), GO to M2

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or terminal issues.

M2 CHECK THE TRANSMISSION FLUID AUXILIARY PUMP POWER CIRCUITS

Ignition OFF.

Disconnect Transmission Fluid Auxiliary Pump C1717.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1717-1	Courtesy of FORD MOTOR COMPANY	Ground
C1717-2	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to M3

No	VERIFY the BJB fuses 49 and 57 are OK. If fuses are OK, REPAIR the affected circuit for an open. If fuses are not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the cause of the affected circuit shorted to ground.

M3 CHECK THE TRANSMISSION FLUID AUXILIARY PUMP GROUND CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1717-6	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	For DTC P0C2A:00, For all other diagnostic trouble codes (DTCs), GO to M4

No	REPAIR the circuit

M4 CHECK TRANSMISSION FLUID AUXILIARY PUMP FEEDBACK / MONITOR CIRCUIT FOR OPEN

Ignition OFF.

Disconnect PCM C1915E.

Disconnect Transmission Fluid Auxiliary Pump C1717.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1915E-81	Courtesy of FORD MOTOR COMPANY	C1717-5

Is the resistance less than 3 ohms?

Yes

GO to M5

No	REPAIR the circuit.

M5 CHECK TRANSMISSION FLUID AUXILIARY PUMP FEEDBACK / MONITOR CIRCUIT FOR SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1915E-81	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to M6

No	REPAIR the circuit

M6 CHECK TRANSMISSION FLUID AUXILIARY PUMP FEEDBACK / MONITOR CIRCUIT FOR SHORT TO POWER

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1717-4	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage detected?

Yes	REPAIR the circuit.

GO to M7

M7 CHECK TRANSMISSION FLUID AUXILIARY PUMP COMMAND CIRCUIT FOR SHORT TO POWER

Ignition OFF.

Disconnect PCM C1915E.

Disconnect Transmission Fluid Auxiliary Pump C1717.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1915E-79	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage detected?

Yes	REPAIR the circuit.

GO to M8

M8 CHECK TRANSMISSION FLUID AUXILIARY PUMP COMMAND CIRCUIT FOR OPEN

Disconnect PCM C1915E.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1915E-79	Courtesy of FORD MOTOR COMPANY	C1717-4

Is the resistance less than 3 ohms?

Yes

GO to M9

No	REPAIR the circuit

M9 CHECK THE TRANSMISSION FLUID AUXILIARY PUMP PWM (PULSE WIDTH MODULATION) CIRCUIT FOR A SHORT TO GROUND

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1915E-79	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to M10

No	REPAIR the circuit

M10 CHECK THE TRANSMISSION FLUID AUXILIARY PUMP DUTY CYCLE OPERATION
- Connect PCM C1915E.
- Connect Transmission Fluid Auxiliary Pump C1717.
- Connect the diagnostic tool.
- Ignition ON.
- Using a diagnostic scan tool, COMMAND the transmission fluid auxiliary pump ON using, TRANS_PMP_CMD and set to a duty cycle of 70%.
- MONITOR the diagnostic trouble codes (DTCs), TRANS_PMP_MEAS.
Does TRANS_PMP_MEAS quickly return to 44% to 51% after the command percentage changes?

Yes The transmission fluid auxiliary pump is operating correctly at this time.

No INSTALL a new transmission fluid auxiliary pump. REFER to: Transmission Fluid Auxiliary Pump .