Toyota Corolla

1992-1998 of release

Repair and car operation



Toyota Corolla
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Systems of cooling, heating
- 5. Fuel, exhaust systems
   5.1. Specifications
   5.2. Order of performance of a decompression of fuel system
   5.3. Fuel pump and pressure of fuel
   5.4. Removal and installation of the fuel pump
   5.5. Fuel level sensor
   5.6. Gasoline pipe lines and joints
   5.7. Fuel tank
   5.8. Cleaning and repair of a fuel tank
   5.9. Air filter
   5.10. Cable of a drive of a butterfly valve
   5.11. System of electronic injection of fuel (EFI - system)
   5.12. Check and replacement of EFI units - systems
   5.13. Service of an exhaust system
+ 6. System of decrease in toxicity
+ 7. Transmissions
+ 8. Coupling and semi-axes
+ 9. Brake system
+ 10. Suspension bracket and steering
+ 11. Body
+ 12. Electric equipment


5.3. Fuel pump and pressure of fuel

GENERAL INFORMATION

Scheme of a power-supply circuit of the fuel pump

1. Battery
2. Main safety lock (3,0 W)
3. A fusible insert of AM1 on 30 And
4. A fusible insert of AM1 on 40 And
5. The switch of the auxiliary relay of a starter (on cars with mechanical transmission) or the Park/Neutral switch (on cars with automatic transmission)
6. Ignition key
7. Starter
8. An ignition safety lock (on 10 And)
9. Main relay of system of injection
10. Auxiliary relay of a starter
11. Relay of the fuel pump
12. To the control unit
13. Fuel pump

Check of the fuel pump

PERFORMANCE ORDER
1. Include ignition (the engine not to start).
2. On all cars let out in 1993-1994, and also on cars with the engine 1,3 and 1,6 of the l which have been let out since 1995, connect накоротко conclusions In + and FP (arrow) on the diagnostic socket by means of a special crossing point (SST – the special tool according to the catalog).

Prevention

On release cars since 1995 and with the engine of 1,8 l, and also on all cars equipped with onboard system of diagnostics of OBD II, food giving on the fuel pump via the diagnostic socket is not provided. On these cars for reading of pressure of fuel it is necessary to start the engine.


3. After a peremykaniye of the specified conclusions to the fuel pump tension moves. In a place under a back seat operation of the pump should be listened, and on a hose from the fuel filter there should be a pressure of fuel.
4. Disconnect a crossing point. Establish a cap on the diagnostic socket.
5. Switch off ignition.
6. If the pump does not work, check the following elements of a chain: a safety lock of the main relay of system of the injection (EFI relay) calculated on 15 And, a fusible insert of the ignition key on 30 And (AM2 insert, see fig. The scheme of a power-supply circuit of the fuel pump), the main relay of system of injection (EFI relay) and the relay of the fuel pump, the fuel pump, and also conducting and sockets (see the scheme electric basic at the end of the management).

Check of the fuel pump


For performance described below procedure the manometer for measurement of pressure of fuel with a hose, calculated on pressure not less than 3 kgfs/cm2 is required. The tip of a hose should have a banjo type design, i.e. be condensed with a bolt with the internal through channel (Toyota 09268-45012 special tool).

In the absence of a special manometer it is possible to arrive as follows.

PERFORMANCE ORDER
1. Get the ready union of the banjo type, with internal diameter of 12 mm to which the hose with a collar from your manometer approaches.
2. In the absence of the ready union of suitable diameter get a bolt with carving М12 x 1,25 mm, grind off a head of a bolt and drill two openings – one through on the bolt center, and another – on the center across a bolt, being crossed with a longitudinal opening. Screw a nut and a lock-nut, having condensed a carving with a teflon tape.
3. Unscrew a stopper of a jellied mouth of a tank that provides dumping of residual pressure in a tank.
4. Be convinced that tension on the battery is not lower 12 In (see subsection 3.3.10).
5. Execute actions for a decompression of fuel system (see subsection 5.2).
6. Pressure of fuel can be checked in two places. In the presence of a special adapter (special tool 09268-45012) which is mounted on the fuel distributor, unscrew a bolt on the distributor and screw a manometer adapter (drawing at the left). If you independently made an adapter in the form of the drilled bolt with a lock-nut, unscrew a cover of the fuel filter and instead of a bolt of a cover wrap the self-made union of a manometer (a photo on the right).
7. A manometer connect in the following order. In the presence of a "regular" manometer connect it to a special adapter established on the fuel distributor. Surely establish new laying on both parties of an adapter. If there is independently made adapter in the form of bolt М12 x 1,25, screw a bolt in the fuel filter, tighten a lock-nut and attach a manometer hose with a collar.
8. Put the lever of the selector of automatic transmission in the situation Park, or the gear shifting lever in neutral situation (if the car is equipped with a manual transmission).
9. On all cars which have been let out in 1993-1994, and also on cars with the engine 1,3 and 1,6 of the l which have been let out since 1995, connect накоротко conclusions In + and FP on the diagnostic socket by means of a special crossing point (SST).

Prevention

On release cars since 1995 with the engine of 1,8 l, and also on all cars equipped with onboard system of self-diagnostics of OBD II, food giving on the fuel pump via the diagnostic socket is not provided. On these cars for reading of pressure of fuel it is necessary to start the engine.


10. Include ignition (the engine not to start). Consider the indication.
11. If pressure raised, check a return gasoline pipe line. If gasoline passes through a gasoline pipe line, replace a regulator of pressure of fuel; if pressure lowered, press a return gasoline pipe line.
12. If pressure increases, replace a regulator of pressure of fuel. If pressure does not increase, check the highway of supply of fuel, the fuel pump and the fuel filter.
13. Remove a crossing point from the diagnostic socket, or from the socket of the fuel pump.
14. Start the engine.
15. Check pressure of fuel idling, result compare to the standard.
16. If pressure differs from standard, check a vacuum hose and a regulator of pressure of fuel.
17. Stop the engine and be convinced that pressure of fuel remains at level of 1,35 kgfs/cm2 within 5 minutes after a stop. If pressure falls down quicker, the reason can be leak in the fuel pump, a regulator of pressure or in a nozzle.

Check of a regulator of pressure of fuel

PERFORMANCE ORDER
1. Disconnect and muffle a vacuum hose of a regulator of pressure of fuel. Connect to a regulator the manual vacuum pump. Start the engine and consider the indication of pressure of fuel without depression on a regulator. Create depression in a regulator and again consider pressure of fuel. With depression growth on a regulator pressure of fuel should decrease. Compare indications of pressure of fuel with specified in in subsection 5.1.
2. Attach a vacuum hose to a regulator and check pressure of fuel idling. Compare indications of pressure of fuel with specified in subsection 5.1. Disconnect a hose and again consider pressure as soon as the hose is disconnected, pressure should increase jump to the top standard limit.
3. If pressure of fuel idling at the disconnected hose too high, measure by the vacuum gage depression size on a vacuum hose. If the vacuum gage shows nothing, check tightness of a soaking-up collector and the mixing chamber (cover) of a collector.
4. If pressure of fuel lowered, reliably press a return gasoline pipe line and consider indications of pressure of fuel. If pressure does not increase, the fuel pump is faulty, or the highway of supply of fuel is littered. If pressure sharply increased, a regulator of pressure of fuel replace (see subsection 5.12).
5. If pressure of fuel too high, execute actions for a system decompression (see subsection 5.2), disconnect a return gasoline pipe line and blow it. If the return gasoline pipe line is not littered, a regulator of pressure replace.
6. If the behavior of pressure differs from described in item 2, a regulator of pressure replace (see subsection 5.12).
7. Carefully remove a manometer, previously having spread rags under assorted connection.
8. Wrap the union of the distributor of fuel, previously having replaced laying.
9. Wipe the spilled gasoline.
10. Start the engine and check existence of a leak of gasoline.

Check of the main relay of system

PERFORMANCE ORDER
1. Two relays are switched on in an electric chain of fuel system. At first check tension existence from the battery on the main relay, and then on the relay of the fuel pump.
2. Disconnect the main relay from the socket, then include ignition (the engine do not start) and check tension existence from the battery.
3. If tension from the battery is, put the main relay on a place and check tension existence from the battery on the relay of the fuel pump. For access to the relay it is required to remove the receiver (see subsection 12.11).
4. If tension from the battery is present on both relays, check relays.

Check of the main relay (Nippondenso type)

PERFORMANCE ORDER
1. An ohmmeter check integrity of a chain between contacts 1 and 2. Between contacts 3 and the 5th ohmmeter should show a gap.
2. On conclusions 1 and 2 submit tension from the battery. Now between conclusions 3 and 5 should be the closed chain. If results of tests differ, the relay replace.

Check of the main relay (Bosch type)

PERFORMANCE ORDER
1. An ohmmeter check integrity of a chain between contacts 86 and 85. Between contacts 87 and the 30th ohmmeter should show a gap.
2. On conclusions 86 and 85 submit tension from the battery. Now between conclusions 87 and 30 should be the closed chain. If results of tests differ, the relay replace.

Check of the fuel pump

PERFORMANCE ORDER
1. An ohmmeter check integrity of a chain between ST and E1 contacts. Check integrity of a chain between conclusions +В and FC. Between contacts +В and FP the ohmmeter should show a gap.
2. On conclusions of ST and E1 submit tension from the battery. Now between conclusions +В and FP should be the closed chain. If results of tests differ, the relay replace.