Pinpoint Test D : P261A, P261B, P261C, P261D

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 AUTOMATIC CLIMATE CONTROL SYSTEM for schematic and connector information.

Normal Operation and Fault Conditions

The electric coolant pump is controlled by the PCM and provides additional engine cooling only when the engine reaches a critical temperature during hot soak conditions. This can occur if the engine has been operated at a high load for a long time and is then parked immediately with the engine shut off. This can lead to an excessive build-up of heat around the engine and turbocharger. The PCM monitors the electric coolant pump and circuits for faults setting a DTC. The following DTCs will not illuminate the MIL.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P261A:00	Coolant Pump "B" Control Circuit/Open: No Sub Type Information	This DTC sets when the PCM senses an open circuit on the electric coolant pump circuits
PCM P261B:00	Coolant Pump "B" Control Circuit Performance/Stuck Off: No Sub Type Information	This DTC sets when the PCM senses any of the following conditions: Dry-Run leads to electric coolant pump running without resistance Over Temperature Over/Under Voltage Impeller Stall Impeller Speed below minimum speed Internal Error
PCM P261C:00	Coolant Pump "B" Control Circuit Low: No Sub Type Information	This DTC sets when the PCM senses low voltage on the PWM circuit.
PCM P261D:00	Coolant Pump "B" Control Circuit High: No Sub Type Information	This DTC sets when the PCM senses high voltage on the PWM circuit.

Possible Sources

Wiring, terminals or connectors
Low coolant or air in the cooling system
Electric coolant pump
PCM

D1 CHECK ELECTRIC COOLANT PUMP B+ CIRCUIT

Disconnect Electric coolant pump C1450.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1450-2	Courtesy of FORD MOTOR COMPANY	Ground

Did the test lamp illuminate bright?

Yes

GO to D2

No	VERIFY the BJB fuse 22 (10A) is OK. If the fuse is OK, REPAIR the circuit. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

D2 CHECK ELECTRIC WATER PUMP CHASSIS GROUND AND CIRCUIT

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1450-1	Courtesy of FORD MOTOR COMPANY	12V BATTERY POST (B+)

Did the test lamp illuminate bright?

Yes

GO to D3

No	Remove G113 and clean mounting surface. Reinstall the ground bolt and retest. If the concern remains REPAIR the circuit.

D3 CHECK THE ELECTRIC WATER PUMP CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect PCM C1232B.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1450-3	Courtesy of FORD MOTOR COMPANY	Ground

Is there any voltage present?

Yes	REPAIR the circuit.

GO to D4

D4 CHECK THE ELECTRIC WATER PUMP CONTROL CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1450-3	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to D5

No	REPAIR the circuit.

D5 CHECK THE ELECTRIC WATER PUMP CONTROL CIRCUIT FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1450-3	Courtesy of FORD MOTOR COMPANY	C1232B-80

Are the resistances less than 3 ohms?

Yes

GO to D6

No	REPAIR the circuit in question.

D6 CHECK THE ELECTRIC WATER PUMP CIRCUITS FOR A SHORT TOGETHER

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1450-1	Courtesy of FORD MOTOR COMPANY	C1450-2
C1450-1	Courtesy of FORD MOTOR COMPANY	C1450-3
C1450-2	Courtesy of FORD MOTOR COMPANY	C1450-3

Is the resistance greater than 10, 000 ohms?

Yes

GO to D7

No	REPAIR the circuits.

D7 CHECK THE ENGINE COOLANT LEVEL

NOTE: Allow the engine to cool before checking the engine coolant level.
- Visually inspect the engine coolant level at the degas bottle.
Is the engine coolant level within specifications?

Yes GO to D8

No GO to Pinpoint Test A

D8 CLEAR ALL PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES

Reconnect all disconnected connectors. Make sure they seat and latch correctly.

Ignition ON.

Using a diagnostic scan tool, CLEAR all PCM Diagnostic Trouble Codes (DTCs).

Using a scan tool, perform PCM self-test.

Are DTC's P261A, P261B, P261C OR P261D present?

Yes	INSTALL a new electric coolant pump. REFER to: Electric Coolant Pump . CLEAR the DTCs and repeat the PCM self test. If the DTC does not repeat the concern is repaired. If the DTC repeats GO to D9

No	The concern is not present at this time.

D9 CHECK FOR CORRECT POWERTRAIN CONTROL MODULE (PCM) OPERATION

Ignition OFF.

Disconnect and inspect the PCM connectors.

Repair:
- corrosion (replace connector or terminals - clean module pins)
- damaged or bent pins - replace terminals/pins
- pushed-out pins - replace pins as necessary

Reconnect the PCM connectors. Make sure they seat and latch correctly.

Operate the system and verify the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to PCM GUIDED ROUTINE TESTING .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.