DTC P0627

DTC P0627  : Fuel Pump Control (FPC) System Malfunction

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to 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 the fuel pump control module, PGM-FI main relay 2, the fuel tank unit, and the PCM.

2. Fuse check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Check the following fuse.

   Fuse	No. D21 (20 A)
   Location	Driver's under-dash fuse/relay box

   Is the fuse OK?

   YES 

   Go to step 3.

   NO 

   Check for a short to ground on the No. D21 (20 A) fuse circuit, if needed, replace the driver's under-dash fuse/relay box . Also replace the No. D21 (20 A) fuse, then do the repair verification.

3. Determine possible failure area (FUEL PUMP RLY OUT line or GND line, others)

   -1. Disconnect the following connector.

   Fuel pump control module 6P connector

   -2. Turn the vehicle to the ON mode.

   -3. Measure the voltage between test points 1 and 2.

   Test condition

   Vehicle 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 (PNK)
   Test point 2	Fuel pump control module 6P connector No. 4 (BLK)

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   Is there battery voltage?

   YES 

   Go to step 11.

   NO 

   Go to step 4.

4. Open wire check (GND line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) 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

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   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 G702, then do the repair verification.

5. Relay check (PGM-FI main relay 2)

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

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   -2. Test PGM-FI main relay 2 .

   Is the relay OK?

   YES 

   Go to step 6.

   NO 

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

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

   -1. Turn the vehicle to the ON mode.

   -2. Measure the voltage between test points 1 and 2.

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

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   Go to step 8.

   NO 

   Go to step 7.

7. Open wire check (FI MAIN RLY OUT line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Driver's under-dash fuse/relay box connector F (32P)

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

   Courtesy of HONDA, U.S.A., INC.

   -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

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   -5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PGM-FI main relay 1: disconnected
   	PGM-FI main relay 1 4P socket No. 2: jumped to body ground
   	PGM-FI main relay 2: disconnected
   	Driver's under-dash fuse/relay box connector F (32P): disconnected
   	Fuel pump control module 6P connector: disconnected
   Test circuit	FI MAIN RLY OUT
   Test point 1	Driver's under-dash fuse/relay box connector F (32P) No. 10 (RED)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The FI MAIN RLY OUT wire is not open. Replace the driver's 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 driver's under-dash fuse/relay box, then do the repair verification.

8. Driver's under-dash fuse/relay box internal circuit check (IG1 FUEL PUMP line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle 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. 1
   Test point 2	Body ground

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   Is there battery voltage?

   YES 

   The IG1 FUEL PUMP circuit in the driver's under-dash fuse/relay box is OK. Go to step 9.

   NO 

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

9. Open wire check (FUEL PUMP RLY OUT line)

   -1. Turn the vehicle to the OFF (LOCK) 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

   Courtesy of HONDA, U.S.A., INC.

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	PGM-FI main relay 2: disconnected
   	PGM-FI main relay 2 4P socket No. 1 and No. 2: jumped
   	Fuel pump control module 6P connector: disconnected
   Test circuit	FUEL PUMP RLY OUT
   Test point 1	Fuel pump control module 6P connector No. 1 (PNK)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   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)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Remove the jumper wire from the PGM-FI main relay 2 4P socket

    -3. Jump the SCS line with the HDS.

    SCS short

    -4. Disconnect the following connector.

    PCM connector A (51P)

    -5. Connect terminals A and B with a jumper wire.

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

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    -6. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	PGM-FI main relay 2: disconnected
    	PGM-FI main relay 2 4P socket No. 4: jumped to body ground
    	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 (GRN)
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    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

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Reconnect the following connector.

    Fuel pump control module 6P connector

    -3. Turn the vehicle to the ON mode.

    -4. Clear the DTC with the HDS.

    -5. Turn the vehicle to the OFF (LOCK) mode.

    -6. Turn the vehicle to 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)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Jump the SCS line with the HDS.

    SCS short

    -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	Vehicle OFF (LOCK) mode
    	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

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    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)

    -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

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    -2. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	Fuel pump control module 6P connector: disconnected
    	Fuel pump control module 6P connector No. 3: jumped to body ground
    	PCM connector A (51P): disconnected
    Test circuit	FPCD
    Test point 1	PCM connector A (51P) No. 28 (YEL)
    Test point 2	Body ground

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    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

    -1. Remove the jumper wire from the fuel pump control module 6P connector.

    -2. Reconnect all connectors.

    -3. Turn the vehicle to the ON mode.

    -4. Measure the voltage between test points 1 and 2.

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

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    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)

    -1. Turn the vehicle to the OFF (LOCK) 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	Vehicle OFF (LOCK) 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 (YEL)
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    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 OK. Go to step 16.

16. Fuel pump control module check (substitution)

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

    -2. Reconnect all connectors.

    -3. Turn the vehicle to the ON mode.

    -4. Reset the PCM with the HDS .

    Reset PCM

    -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)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Jump the SCS line with the HDS.

    SCS short

    -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	Vehicle OFF (LOCK) 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 (GRY)
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    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)

    -1. Connect terminals A and B with a jumper wire.

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

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    -2. Check for continuity between test points 1 and 2.

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

    Courtesy of HONDA, U.S.A., INC.

    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

    -1. Remove the jumper wire from the fuel pump control module 6P connector.

    -2. Reconnect all connectors.

    -3. Turn the vehicle to the ON mode.

    -4. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle ON mode within 2 seconds from turning Vehicle ON mode
    Test circuit	FPC
    Test point 1	Fuel pump control module 6P connector No. 2 (GRY)
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    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)

    -1. Turn the vehicle to the OFF (LOCK) 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 (WHT)
    Terminal B	Body ground

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    -4. Check for continuity between test points 1 and 2.

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

    Courtesy of HONDA, U.S.A., INC.

    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)

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

    -2. Connect terminals A and B with a jumper wire.

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

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    -3. Check for continuity between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	Fuel pump control module 6P connector: disconnected
    	Fuel tank unit 4P connector: disconnected
    	Fuel tank unit 4P connector No. 3: jumped to body ground
    Test circuit	FUEL PUMP-
    Test point 1	Fuel pump control module 6P connector No. 5 (YEL)
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    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)

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

    -2. Reconnect the following connector.

    Fuel pump control module 6P connector

    -3. Turn the vehicle to the ON mode.

    -4. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle ON mode within 2 seconds from turning Vehicle ON mode
    Test circuit	FUEL PUMP+
    Test point 1	Fuel tank unit 4P connector No. 1 (WHT)
    Test point 2	Body ground

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    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)

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

    -2. Reconnect all connectors.

    -3. Turn the vehicle to the ON mode.

    -4. Reset the PCM with the HDS .

    Reset PCM

    -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.

24. Repair verification

    -1. Turn the vehicle to the OFF (LOCK) mode.

    -2. Reconnect all connectors.

    -3. Exit the SCS mode with the HDS.

    -4. Turn the vehicle to the ON mode.

    -5. Reset the PCM with the HDS .

    Reset PCM

    -6. Do the PCM idle learn procedure .

    -7. Check for Pending or Confirmed DTCs with the HDS.

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

    DTC (PGM-FI)

    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.