FUEL SYSTEM > PRECAUTION

for Preparation Click here

1.IGNITION SWITCH EXPRESSIONS

The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.

Expression
Ignition Switch (position)
Engine Switch (condition)
Ignition Switch off
LOCK
Off
Ignition Switch ACC
ACC
On (ACC)
Ignition Switch ON
ON
On (IG)
Engine Start
START
Start

2.FUEL SYSTEM

Text in Illustration
*1	Plastic Bag

When disconnecting the fuel line, fuel will splash. So take the following precautions.
1. Disconnect the fuel tube
2. Release the pressure remaining in the fuel tank main tube.
3. Protect the contact surface by covering it with a plastic bag.

Observe the following precautions when disconnecting the fuel tube connectors (Quick Type A).
1. Check that there is no dirt or other foreign matter on the fuel tube connector and pipe before disconnecting them. Clean them if necessary.
2. Disengage the lock claw by lifting the cover, as shown in the illustration.
3. Disconnect the fuel tube connector from the pipe by pinching the retainer as shown in the illustration.
  NOTICE:
  Do not use any tools.
4. If the fuel tube connector and the pipe are stuck, push and pull on the fuel tube connector to release them. Pull the fuel tube connector out of the pipe carefully.
  NOTICE:
  Do not use any tools.
5. Check the sealing surfaces of the disconnected parts, and clean them if necessary.
6. Cover the disconnected pipe and fuel tube connector with a plastic bag.
  Text in Illustration
  *1
  Plastic bag
  NOTICE:
  Do not damage the pipe or fuel tube connector, and prevent entry of foreign objects.

Observe the following precautions when connecting the fuel tube connectors (Quick Type A).
1. Check that there is no dirt or other foreign matter on the fuel tube connector and pipe before connecting them. Clean them if necessary.
2. Line up the pipe and connector and push them together until a "click" sound is heard.
  HINT:
  If the pipe is difficult to push into the connector, apply a small amount of clean engine oil to the tip of the pipe and reinsert it.
3. After connecting the fuel tube connector, check that the pipe and fuel tube connector are securely connected by pulling on them.

Observe the following precautions when disconnecting the fuel tube connectors (Quick Type B).
1. Check for dirt or other foreign matter on the parts to be disconnected and clean them if necessary.
2. Pull the tabs of the fuel tube retainer as shown in the illustration to disconnect the fuel tube connector from the pipe.
  NOTICE:
  Do not use any tools.
3. If the fuel tube connector and the pipe are stuck, push and pull on the fuel tube connector to release them. Pull the fuel tube connector out of the pipe carefully.
  NOTICE:
  Do not use any tools.
4. Check the sealing surfaces of the disconnected parts, and clean them if necessary
5. Cover the disconnected pipe and fuel tube connector with a plastic bag.
  Text in Illustration
  *1
  Plastic bag
  NOTICE:
  Do not damage the pipe or fuel tube connector, and prevent entry of foreign objects.

Observe the following precautions when connecting the fuel tube connectors (Quick Type B).
1. Check that there are no scratches or foreign objects on the connecting part.
2. Line up the pipe and the fuel tube connector to be connected, and push them together and push down the retainer.
3. After connecting the fuel tube connector, check that the pipe and fuel tube connector are securely connected by pulling on them.

Text in Illustration
*1	Plastic bag

Text in Illustration
*1	Plastic bag

3.INSPECT FOR FUEL LEAK

Check that there is no fuel leakage after doing maintenance on the fuel system (Click here).

4.BLEED AIR FROM FUEL SYSTEM

(a) Using the hand pump mounted on the fuel filter cap, bleed the air from the fuel system. Continue pumping until the pump resistance increases.
Text in Illustration
*1
Hand Pump
NOTICE:
1. Hand pump pumping speed: Max. 2 strokes/sec.
2. The hand pump must be pushed full stroke during pumping.
3. When the fuel pressure at the supply pump inlet port reaches a saturated pressure, the hand pump resistance increases.
4. If pumping is interrupted during the air bleeding process, fuel in the fuel line may return to the fuel tank. Continue pumping until the hand pump resistance increases.
5. If the hand pump resistance does not increase despite consecutively pumping 200 times or more, there may be a fuel leak between the fuel tank and fuel filter, the hand pump may be malfunctioning, or the vehicle may have run out of fuel.
6. If a large amount of air remains inside the fuel system, the common rail pressure does not rise to the pressure range necessary for normal use, and the engine cannot be started.
(b) Start the engine.
NOTICE:
1. If a large amount of air remains inside the fuel system, the starter may need to be cranked for 10 seconds or more to start the engine.
2. Do not crank the engine continuously for more than 20 seconds. The battery may be discharged.
3. Use a fully-charged battery.
HINT:
1. When the engine can be started, proceed to the next step.
2. If the engine cannot be started, bleed the air again using the hand pump until the hand pump resistance increases (refer to step (a)). Then start the engine.
(c) Turn the ignition switch off.
(d) Connect the intelligent tester to the DLC3.
(e) Turn the ignition switch to ON and turn the tester on.
(f) Clear DTCs.
(g) Start the engine.

(h) Enter the following menus: Powertrain / Engine and ECT / Active Test / Test the Fuel Leak.
(i) Maintain the engine speed at 3500rpm, and then press the "Start" button.
(j) Perform the following test 5 times with on/off intervals of 10 seconds: Active Test / Test the Fuel Leak.

(k) Allow the engine to idle for 3 minutes or more after performing the Active Test.
HINT:
When the Active Test "Test the Fuel Leak" is used to change the pump control mode, the actual fuel pressure inside the common rail drops below the target fuel pressure when the Active Test is off, but this is normal and does not indicate a pump malfunction.
(l) Enter the following menus: Powertrain / Engine and ECT / DTC.
(m) Read Current DTCs.
HINT:
1. When no DTCs are output, the air bleeding is completed.
2. If any DTCs are output, proceed to the next step.
(n) Clear DTCs.
(o) Repeat steps (g) to (k).

Expression	Ignition Switch (position)	Engine Switch (condition)
Ignition Switch off	LOCK	Off
Ignition Switch ACC	ACC	On (ACC)
Ignition Switch ON	ON	On (IG)
Engine Start	START	Start