2. Check the quality of injection by fuel injectors
Note: Avoid sparks during testing. Keep a fire extinguisher ready.
- A) Prepare the necessary service tools.
Injector test scheme (3S-GE, 4A-FE, 5E-FE and 7A-FE): 1 - fuel pressure regulator (remove from car), 2 - adapter to the regulator, 3 - adapter to the injector, 4 - service hose, 5 - adapter to the fuel filter, 6 - clamp for fixing the injector, 7 - injector, 8 - fuel filter
Injector test scheme (3S-FE, 4S-FE):
3S-GE. 4A-FE. 5E-FE and 7A-FE
- b) Disconnect the fuel inlet hose from the fuel filter.
- V) Connect the adapter (3) and service hose (4) to the fuel filter outlet (2) with a bolt (5). installed with new gaskets (6). Tightening torque: 29 Nm.
Note, use the vehicle's fuel filter.
3S-FE, 4S-FE
- b) Remove the bypass bolt, remove the 2 gaskets and disconnect the inlet fuel hose from the fuel supply pipe.
Note: when removing the bypass bolt. hold the fuel filter in place with a wrench.
- V) Connect the adapter fitting and service hose to the fuel supply pipe using two new gaskets and bypass bolts. Tightening torque: 29 N.m.
All-engines
- G) Disconnect the fuel pressure regulator from the fuel manifold and connect a service hose to it using an adapter fitting, attaching it to the regulator with 2 bolts. Tightening torque: 9 Nm. Connect fuel return hose (4) to the regulator.
Note: Install new gaskets on the fuel pressure regulator.
- d) Install a new safety sleeve and a new O-ring (1) on the nozzle (2).
- e) Connect the adapter (3» i service hose (4) to nozzle (2), secure the nozzle with the clamp (5).
- and) Install the nozzle in a measuring container. Put on a suitable vinyl hose (6) on the injector to prevent fuel splashing.
- h) Connect (-) wire to negative (-) battery terminal and turn on the ignition.
Note: do not start the engine.
- And) Jumper short the terminals "FP" And "+V" diagnostic socket.
- To) Connect the service wire to the injector and battery for 15 seconds, measure the volume of fuel injected into the measuring vessel. Repeat the test 2-3 times for each injector.
Volume of injected fuel:
- 3S-FE, 4S-FE: 49-59 cm3for 15 s
- 3S-GE: 66-82cm3 for 15 s
- 4A-FE, 7A-FE: 40-50cm3 for 15 s
- 5E-FE: 34-44cm3 for 15 s
Difference in delivery between nozzles up to 5 cm3. If the fuel supply is out of range, replace the injector.
3. Check for leaks.
- A) At the end of the previous check, disconnect the wires from the battery and check for fuel leakage through the injector. Leak no more than 1 drop in 1 minute.
- b) Switch off the ignition, remove the jumper from the diagnostic connector and disconnect (-) wire from the negative battery terminal.
- V) Remove adapter fittings and service hoses.
- G) (3S-GE, 4A-FE, 5E-FE and 7A-FE) Connect the fuel hose to the fuel filter outlet by tightening the bypass bolt. Tightening torque: 29 Nm
- d) (3S-FE, 4S-FE) Connect the fuel inlet hose to the fuel feed pipe using 2 new gaskets and a bypass bolt. Tightening torque: 29 Nm.
Note: When removing or installing the bypass bolt, hold the fuel filter in place with a wrench.
4. Check the operation of the injectors.
- A) Apply 12 V to the injector from the battery and "dry" a clear click, conclude that the injector is in good condition. If there is a dull or fuzzy click, the nozzle must be washed.
Attention:
- A large current passes through the nozzle winding, so it is impossible to (more than 0.5 sec) supply power to it, otherwise it will overheat and burn out.
- Apply voltage for a short time (poke the wire into the leads and immediately remove).