DTC Troubleshooting: P0627(2.0L Engine): Inspection

FUEL_PUMP_RLY_OUT Circuit Inspection 

Test Procedure 

• Preparation
• • Fuel pump driver unit connector B (3P): disconnected
• Procedure
• • Perform the inspection according to the following table.

			(Disconnected) Fuel pump driver unit connector B (3P)female terminals
		IG Mode	Courtesy of HONDA, U.S.A., INC.	Normal Conditions

	FUEL_PUMP_RLY_OUT circuit inspection	ON*1		12 V battery voltage [circuit type 3]
	*1: Within 2 seconds after turning the vehicle to the ON mode

Results 

• If abnormal, there is a problem in the circuit.
  NOTE: If the power supply inspection of the above table showed abnormally, do the additional Power Supply Inspection , to locate the failure.

FPC, GND Circuit Inspection 

NOTICE: 

Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait more than 1 minute.

Test Procedure 

• Preparation
• • PCM connector A (50P): disconnected
  • Fuel pump driver unit connector B (3P): disconnected
• Procedure
• • Perform the inspection according to the following table.

			(Disconnected) Fuel pump driver unit connector B (3P)female terminals	(Disconnected) PCM connector A (50P) - Refer to: PCM Connector for Inputs and Outputs(3.0L Engine) or PCM Connector for Inputs and Outputs(2.0L Engine) female terminals
		IG Mode	Courtesy of HONDA, U.S.A., INC.	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
	GND open wire inspection	OFF			There is less than 1 Ohm
	FPC open wire inspection	OFF			There is less than 1 Ohm
	NOTE: Refer to the Open/Shorted Wire Inspection Description for the method to inspect the shorted circuit below, then start to inspect according to circumstances.
	FPC shorted to power inspection	ON			Not shorted

	FPC shorted to ground inspection	OFF			Not shorted

Results 

• If abnormal, there is a problem in the circuit.

FPCD, FUEL_PUMP+, SUB_FUEL_PUMP_RLY_OUT, FUEL_PUMP- Circuit Inspection 

Test Procedure 

• Preparation
• • -

    Fuel pump driver unit connector A (4P): disconnected

  • -

    Fuel pump driver unit connector B (3P): disconnected

  • -

    Fuel tank unit connector A (4P): disconnected

• Procedure
• • -

    Perform the inspection according to the following table.

			(Disconnected) Fuel pump driver unit connector A (4P)female terminals	(Disconnected) Fuel tank unit connector A (4P)female terminals
		IG Mode	Courtesy of HONDA, U.S.A., INC.	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
	FPCD open wire inspection	OFF			There is less than 1 Ohm
	FUEL_PUMP+ open wire inspection	OFF			There is less than 1 Ohm
	SUB_FUEL_PUMP_RLY_OUT open wire inspection	OFF			There is less than 1 Ohm
	FUEL_PUMP- open wire inspection	OFF			There is less than 1 Ohm
	FPCD, FUEL_PUMP+ shorted wire to wire inspection	OFF			There is more than 1 MOhm
	FPCD, SUB_FUEL_PUMP_RLY_OUT shorted wire to wire inspection	OFF			There is more than 1 MOhm

	FPCD, FUEL_PUMP- shorted wire to wire inspection	OFF			There is more than 1 MOhm
	FUEL_PUMP+, SUB_FUEL_PUMP_RLY_OUT shorted wire to wire inspection	OFF			There is more than 1 MOhm
	FUEL_PUMP+, FUEL_PUMP- shorted wire to wire inspection	OFF			There is more than 1 MOhm
	SUB_FUEL_PUMP_RLY_OUT, FUEL_PUMP- shorted wire to wire inspection	OFF			There is more than 1 MOhm
	NOTE: Refer to the Open/Shorted Wire Inspection Description for the method to inspect the shorted circuit below, then start to inspect according to circumstances.
	FPCD shorted to power inspection	ON			Not shorted
	FUEL_ PUMP+ shorted to power inspection	ON			Not shorted
	SUB_FUEL_PUMP_ RLY_OUT shorted to power inspection	ON			Not shorted
	FUEL_PUMP- shorted to power inspection	ON			Not shorted
	FPCD shorted to ground inspection	OFF			Not shorted
	FUEL_ PUMP+ shorted to ground inspection	OFF			Not shorted
	SUB_FUEL_PUMP_ RLY_OUT shorted to ground inspection	OFF			Not shorted
	FUEL_PUMP- shorted to ground inspection	OFF			Not shorted

Results 

• If abnormal, there is a problem in the circuit.

Fuel Pump Component Inspection 

Preconditions 

• External circuit is normal

Test Procedure 

• Preparation
• • Fuel pump driver unit connector A (4P): disconnected
  • Fuel pump driver unit connector B (3P): disconnected
• Procedure
• • Perform the inspection according to the following table.

			(Disconnected) Fuel pump driver unit connector A (4P)female terminals
		IG Mode	Courtesy of HONDA, U.S.A., INC.	Normal Conditions
	Pump internal circuit inspection (open wire)	OFF		There is less than 1 Ohm
		OFF		There is less than 1 Ohm
		OFF		There is less than 1 Ohm
	NOTE: Refer to the Open/Shorted Wire Inspection Description for the method to inspect the shorted circuit below, then start to inspect according to circumstances.
	Pump internal circuit inspection (shorted to power)	ON		Not shorted
		ON		Not shorted
		ON		Not shorted
		ON		Not shorted
	Pump internal circuit inspection (shorted to ground)	OFF		Not shorted
		OFF		Not shorted
		OFF		Not shorted
		OFF		Not shorted

Results 

• If it is abnormal, there is a problem with the fuel tank unit.

Fuel Tank Unit Inspection 

Test Procedure 

• Install a known-good fuel tank unit and attempt to reproduce the failure.

Results 

• If the failure is reproduced, there is a problem with other related components.
• If the symptom/DTC goes away, fuel tank unit must be faulty.

Fuel Pump Driver Unit Inspection 

Test Procedure 

• Install a known-good fuel pump driver unit and attempt to reproduce the failure.

Results 

• If the failure is reproduced, there is a problem with other related components.
• If the symptom/DTC goes away, fuel pump driver unit must be faulty.

PCM Inspection 

Test Procedure 

• If the other inspection item(s) indicated a normal condition, then it is determined that the remaining PCM is the cause.

Results 

• There is a problem with the PCM.