DTC Troubleshooting: P0627 (V6) - Honda Accord CR/CT 2012-2017

1.

Problem verification:

Problem verification

?1.	Press the engine start/stop button to select the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Try to start the engine.

?4.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0627 Fuel Pump Control (FPC) System Malfunction

Is DTC P0627 indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at fuel pump control module, PGM-FI main relay 2, the fuel tank unit, and the PCM.?

2.

Fuse check:

Fuse check

?1.	Press the engine start/stop button to select the OFF mode.

?2.

Check the following fuse.

Fuse	No. B9 (20 A)
Location	Under-dash fuse/relay box

Is the fuse OK?


	YES

Go to step 3.


	NO

Check for a short to ground on the No. B9 (20 A) fuse circuit, if needed, replace the under-dash fuse/relay box, also replace the No. B9 (20 A) fuse in the under-dash fuse/relay box, then do the repair verification.

3.

Determine possible failure area (FUEL PUMP RLY OUT, GND, others):

Determine possible failure area (FUEL PUMP RLY OUT, GND, others)

?1.

Disconnect the following connector.

Fuel pump control module 6P connector

?2.	Press the engine start/stop button to select the ON mode.

?3.

Measure the voltage between test points 1 and 2.

Test condition	ON mode
	Fuel pump control module 6P connector: disconnected
Test circuit	FUEL PUMP RLY OUT, GND
Test point 1	Fuel pump control module 6P connector No. 1 (GRN)
Test point 2	Fuel pump control module 6P connector No. 4 (BLK)

Is there battery voltage?


	YES

Go to step 11.


	NO

Go to step 4.

4.

Open wire check (GND line):

Open wire check (GND line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Fuel pump control module 6P connector: disconnected
Test circuit	GND
Test point 1	Fuel pump control module 6P connector No. 4 (BLK)
Test point 2	Body ground

Is there continuity?


	YES

The GND wire is OK. Go to step 5.


	NO

Repair an open in the GND wire between the fuel pump control module and G602, then do the repair verification.

5.

Relay check (PGM-FI main relay 2):

Relay check (PGM-FI main relay 2)

?1.	Remove PGM-FI main relay 2 (A) from the under-dash fuse/relay box.

?2.	Test PGM-FI main relay 2.

Is the relay OK?


	YES

PGM-FI main relay 2 is OK. Go to step 6.


	NO

Replace the PGM-FI main relay 2, then do the repair verification.

6.

Determine possible failure area (FI MAIN RLY OUT line, others):

Determine possible failure area (FI MAIN RLY OUT line, others)

?1.	Press the engine start/stop button to select the ON mode.

?2.

Measure the voltage between test points 1 and 2.

Test condition	ON mode
	PGM-FI main relay 2: disconnected
	Fuel pump control module 6P connector: disconnected
Test circuit	FI MAIN RLY OUT line
Test point 1	PGM-FI main relay 2 4P socket No. 3
Test point 2	Body ground

Is there battery voltage?


	YES

Go to step 8.


	NO

Go to step 7.

7.

Open wire check (FI MAIN RLY OUT line):

Open wire check (FI MAIN RLY OUT line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.

Disconnect the following connector.

Under-dash fuse/relay box connector E (36P)

?3.	Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

?4.

Connect terminals A and B with a jumper wire.

Terminal A	PGM-FI main relay 1 4P socket No. 2
Terminal B	Body ground

?5.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PGM-FI main relay 1: disconnected
	PGM-FI main relay 2: disconnected
	Under-dash fuse/relay box connector E (36P): disconnected
	Fuel pump control module 6P connector: disconnected
Test circuit	FI MAIN RLY OUT line
Test point 1	Under-dash fuse/relay box connector E (36P) No. 13 (BRN)
Test point 2	Body ground

Is there continuity?


	YES

FI MAIN RLY OUT line is not open, replace the under-dash fuse/relay box, then do the repair verification.


	NO

Repair an open in the FI MAIN RLY OUT wire between PGM-FI main relay 1 and the under-dash fuse/relay box, then do the repair verification.

8.

Under-dash fuse/relay box internal circuit check (IG1 FUEL PUMP line):

Under-dash fuse/relay box internal circuit check (IG1 FUEL PUMP line)

?1.

Measure the voltage between test points 1 and 2.

Test condition	ON mode
	PGM-FI main relay 2: disconnected
	Fuel pump control module 6P connector: disconnected
Test circuit	IG1 FUEL PUMP
Test point 1	PGM-FI main relay 2 4P socket No. 2
Test point 2	Body ground

Is there battery voltage?


	YES

The IG1 FUEL PUMP wire is OK. Go to step 9.


	NO

Replace the under-dash fuse/relay box, then do the repair verification.

9.

Open wire check (FUEL PUMP RLY OUT line):

Open wire check (FUEL PUMP RLY OUT line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.

Connect terminals A and B with a jumper wire.

Terminal A	PGM-FI main relay 2 4P socket No. 1
Terminal B	PGM-FI main relay 2 4P socket No. 2

?3.	Press the engine start/stop button to select the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	ON mode
	PGM-FI main relay 2: disconnected
	Fuel pump control module 6P connector: disconnected
Test circuit	FUEL PUMP RLY OUT
Test point 1	Fuel pump control module 6P connector No. 1 (GRN)
Test point 2	Body ground

Is there battery voltage?


	YES

The FUEL PUMP RLY OUT wire is OK. Go to step 10.


	NO

Repair an open in the FUEL PUMP RLY OUT wire between PGM-FI main relay 2 and the fuel pump control module, then do the repair verification.

10.

Open wire check (FUEL PUMP RLY CL- line):

Open wire check (FUEL PUMP RLY CL- line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.	Jump the SCS line with the HDS.

?3.

Disconnect the following connector.

PCM connector A (51P)

?4.

Connect terminals A and B with a jumper wire.

Terminal A	PGM-FI main relay 2 4P socket No. 4
Terminal B	Body ground

?5.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PGM-FI main relay 2: disconnected
	Fuel pump control module 6P connector: disconnected
	PCM connector A (51P): disconnected
Test circuit	FUEL PUMP RLY CL-
Test point 1	PCM connector A (51P) No. 8 (GRY)
Test point 2	Body ground

Is there continuity?


	YES

The FUEL PUMP RLY CL- wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.


	NO

Repair an open in the FUEL PUMP RLY CL- wire between the PCM (A8) and PGM-FI main relay 2, then do the repair verification.

11.

Fuel pump control module operation check:

Fuel pump control module operation check

?1.	Press the engine start/stop button to select the OFF mode.

?2.	Reconnect the fuel pump control module 6P connector.

?3.	Press the engine start/stop button to select the ON mode.

?4.	Clear the DTC with the HDS.

?5.	Press the engine start/stop button to select the OFF mode.

?6.	Press the engine start/stop button to select the ON mode, and check for sound from the fuel pump within 2 seconds.

Does the fuel pump operate?


	YES

Go to step 12.


	NO

Go to step 17.

12.

Shorted wire check (FPCD line):

Shorted wire check (FPCD line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.	Jump the SCS line with the HDS.

?3.

Disconnect the following connectors.

Fuel pump control module 6P connector

PCM connector A (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PGM-FI main relay 2: disconnected
	Fuel pump control module 6P connector: disconnected
	PCM connector A (51P): disconnected
Test circuit	FPCD
Test point 1	Fuel pump control module 6P connector No. 3 (YEL)
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the FPCD wire between the PCM (A28) and the fuel pump control module, then do the repair verification.


	NO

The FPCD wire is not shorted. Go to step 13.

13.

Open wire check (FPCD line):

Open wire check (FPCD line)

?1.

Connect terminals A and B with a jumper wire.

Terminal A	Fuel pump control module 6P connector No. 3 (YEL)
Terminal B	Body ground

?2.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PGM-FI main relay 2: disconnected
	Fuel pump control module 6P connector: disconnected
	PCM connector A (51P): disconnected
Test circuit	FPCD
Test point 1	PCM connector A (51P) No. 28 (YEL)
Test point 2	Body ground

Is there continuity?


	YES

The FPCD wire is OK. Go to step 14


	NO

Repair an open in the FPCD wire between the PCM (A28) and the fuel pump control module, then do the repair verification.

14.

FPCD line signal check:

FPCD line signal check

?1.	Remove the jumper wire from the fuel pump control module.

?2.	Reconnect all connectors, and reinstall PGM-FI main relay 2.

?3.	Press the engine start/stop button to select the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	ON mode
Test circuit	FPCD
Test point 1	Fuel pump control module 6P connector No. 3 (YEL)
Test point 2	Body ground

Is there about 8 V or more?


	YES

Go to step 15.


	NO

Replace the fuel pump control module, then do the repair verification.

15.

Shorted wire check (FUEL PUMP- line):

Shorted wire check (FUEL PUMP- line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.

Disconnect the following connectors.

Fuel pump control module 6P connector

Fuel tank unit 4P connector

?3.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Fuel pump control module 6P connector: disconnected
	Fuel tank unit 4P connector: disconnected
Test circuit	FUEL PUMP-
Test point 1	Fuel pump control module 6P connector No. 5 (PNK)
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the FUEL PUMP- wire between the fuel pump control module and the fuel tank unit, then do the repair verification.


	NO

The FUEL PUMP- wire is not shorted. Go to step 16.

16.

Fuel pump control module check (substitution):

Fuel pump control module check (substitution)

?1.	Substitute a known-good fuel pump control module.

?2.	Reconnect all connectors.

?3.	Press the engine start/stop button to select the ON mode.

?4.	Reset the PCM with the HDS.

?5.	Do the PCM idle learn procedure.

?6.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0627 Fuel Pump Control (FPC) System Malfunction

Is DTC P0627 indicated?


	YES

Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.?


	NO

Replace the original fuel pump control module, then do the repair verification.

17.

Shorted wire check (FPC line):

Shorted wire check (FPC line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.	Jump the SCS line with the HDS.

?3.

Disconnect the following connectors.

Fuel pump control module 6P connector

PCM connector A (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Fuel pump control module 6P connector: disconnected
	PCM connector A (51P): disconnected
Test circuit	FPC
Test point 1	Fuel pump control module 6P connector No. 2 (WHT)
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the FPC wire between the PCM (A29) and the fuel pump control module, then do the repair verification.


	NO

The FPC wire is not shorted. Go to step 18.

18.

Open wire check (FPC line):

Open wire check (FPC line)

?1.

Connect terminals A and B with a jumper wire.

Terminal A	Fuel pump control module 6P connector No. 2 (WHT)
Terminal B	Body ground

?2.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Fuel pump control module 6P connector: disconnected
	PCM connector A (51P): disconnected
Test circuit	FPC
Test point 1	PCM connector A (51P) No. 29 (WHT)
Test point 2	Body ground

Is there continuity?


	YES

The FPC wire is OK. Go to step 19


	NO

Repair an open in the FPC wire between the PCM (A29) and the fuel pump control module, then do the repair verification.

19.

Fuel pump control module operation check:

Fuel pump control module operation check

?1.	Remove the jumper wire from the fuel pump control module connector.

?2.	Reconnect all connectors.

?3.	Press the engine start/stop button to select the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	Within 2 seconds after ON mode
Test circuit	FPC
Test point 1	Fuel pump control module 6P connector No. 2 (WHT)
Test point 2	Body ground

Is there battery voltage?


	YES

Go to step 20.


	NO

Replace the fuel pump control module, then do the repair verification.

20.

Open wire check (FUEL PUMP+ line):

Open wire check (FUEL PUMP+ line)

?1.	Press the engine start/stop button to select the OFF mode.

?2.

Disconnect the following connectors.

Fuel pump control module 6P connector

Fuel tank unit 4P connector

?3.

Connect terminals A and B with a jumper wire.

Terminal A	Fuel tank unit 4P connector No. 1 (PUR)
Terminal B	Body ground

?4.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Fuel pump control module 6P connector: disconnected
	Fuel tank unit 4P connector: disconnected
Test circuit	FUEL PUMP+
Test point 1	Fuel pump control module 6P connector No. 6 (PUR)
Test point 2	Body ground

Is there continuity?


	YES

The FUEL PUMP+ wire is OK. Go to step 21.


	NO

Repair an open in the FUEL PUMP+ wire between the fuel pump control module and the fuel tank unit, then do the repair verification.

21.

Open wire check (FUEL PUMP- line):

Open wire check (FUEL PUMP- line)

?1.

Connect terminals A and B with a jumper wire.

Terminal A	Fuel tank unit 4P connector No. 3 (PNK)
Terminal B	Body ground

?2.

Check for continuity between test points 1 and 2.

Test condition	OFF mode
	Fuel pump control module 6P connector: disconnected
	Fuel tank unit 4P connector: disconnected
Test circuit	FUEL PUMP-
Test point 1	Fuel pump control module 6P connector No. 5 (PNK)
Test point 2	Body ground

Is there continuity?


	YES

The FUEL PUMP- wire is OK. Go to step 22.


	NO

Repair an open in the FUEL PUMP- wire between the fuel pump control module and the fuel tank unit, then do the repair verification.

22.

Determine possible failure area (fuel pump, others):

Determine possible failure area (fuel pump, others)

?1.	Remove the jumper wire from the fuel tank unit 4P connector.

?2.	Reconnect the fuel pump control module 6P connector.

?3.	Press the engine start/stop button to select the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	Within 2 seconds after ON mode
Test circuit	FUEL PUMP+
Test point 1	Fuel tank unit 4P connector No. 1 (PUR)
Test point 2	Body ground

Is there battery voltage?


	YES

Replace the fuel pump, then do the repair verification.


	NO

Go to step 23.

23.

Fuel pump control module check (substitution):

Fuel pump control module check (substitution)

?1.	Substitute a known-good fuel pump control module.

?2.	Reconnect all connectors.

?3.	Press the engine start/stop button to select the ON mode.

?4.	Reset the PCM with the HDS.

?5.	Do the PCM idle learn procedure.

?6.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0627 Fuel Pump Control (FPC) System Malfunction

Is DTC P0627 indicated?


	YES

Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.?


	NO

Replace the original fuel pump control module, then do the repair verification.

Repair verification:

?1.	Reconnect all connectors.

?2.	Exit the SCS mode with the HDS.

?3.	Press the engine start/stop button to select the ON mode.

?4.	Reset the PCM with the HDS.

?5.	Do the PCM idle learn procedure.

?6.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0627 Fuel Pump Control (FPC) System Malfunction

Is DTC P0627 indicated?


	YES

Check for poor connections or loose terminals at PGM-FI main relay 2, the fuel pump control module, the fuel tank unit, and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.


	NO

Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?