Honda Civic manuals

Honda Civic Service Manual: Fuel Pressure Relieving (R18Z1)

Honda Civic Service Manual / Powertrain / Engine / Fuel System / Fuel Pressure Relieving (R18Z1)

Drain

1. Fuel Filler Cap

1.

Remove the fuel fill cap to relieve the pressure in the fuel tank.


2. HDS DLC - Connection


NOTE: For specific operations, refer to the user's manual that came with the Honda Diagnostic System (HDS). Make sure the HDS is loaded with the latest software.


1.

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.


2.

Turn the ignition switch to ON (II).


3.

Make sure the HDS communicates with the vehicle. If it does not communicate, go to the DLC circuit troubleshooting.


3. Fuel Pump Off

1.

Turn the ignition switch to ON (II).


2.

From the INSPECTION MENU of the HDS, select Fuel Pump OFF, then start the engine, and let it idle until it stalls.


NOTE:

Do not allow the engine to idle above 1,000 rpm or the ECM/PCM will continue to operate the fuel pump.

Pending or Confirmed DTC may be set during this procedure. Check for DTCs, and clear them as needed.


3.

Turn the ignition switch to LOCK (0).


4. Battery Terminal - Disconnection


1.

Make sure the ignition switch is in LOCK (0).


2.

Disconnect and isolate the negative cable and battery sensor (A) from the battery.


NOTE: Always disconnect the negative side first.


3.

Disconnect the positive cable (B) from the battery.


5. Fuel Pressure - Relieving


1.

Remove the quick-connect fitting cover (A).


2.

Check the fuel quick-connect fitting for dirt, and clean it if needed.


3.

Place a rag or shop towel over the quick-connect fitting (A).


4.

Disconnect the quick-connect fitting: Hold the connector (A) with one hand, and squeeze the retainer tabs (B) with the other hand to release them from the locking tabs (C). Pull the connector off.


NOTE:

Be careful not to damage the line (D) or other parts.

Do not use tools.

If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push the connector until it comes off easily.

Do not remove the retainer from the line; once removed, the retainer must be replaced with a new one.


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