Fuel Injector: Testing and Inspection
FUEL INJECTOR INSPECTION [L3]
Resistance Inspection
1. Remove the battery cover. Removal and Replacement
2. Disconnect the negative battery cable.
3. Disconnect the fuel injector connector.
4. Inspect the resistance between fuel injector terminals A and B using a tester.
- If within the specification, perform the "Circuit Open/Short Inspection".
- If not within the specification, replace the fuel injector. Service and Repair
Fuel injector resistance
- 11.3-12.7 ohms [20 °C {68 °F}]
Circuit Open/Short Inspection
1. Disconnect the PCM connector. Service and Repair
2. Inspect the following wiring harnesses for open or short circuit (continuity check).
Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- Fuel injector No.1 terminal A and PCM terminal 2BB
- Fuel injector No.2 terminal A and PCM terminal 2BC
- Fuel injector No.3 terminal A and PCM terminal 2BD
- Fuel injector No.4 terminal A and PCM terminal 2AZ
- Fuel injector No.1 terminal B and main relay terminal C
- Fuel injector No.2 terminal B and main relay terminal C
- Fuel injector No.3 terminal B and main relay terminal C
- Fuel injector No.4 terminal B and main relay terminal C
Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- Fuel injector No.1 terminal A and body ground
- Fuel injector No.1 terminal A and power supply
- Fuel injector No.2 terminal A and body ground
- Fuel injector No.2 terminal A and power supply
- Fuel injector No.3 terminal A and body ground
- Fuel injector No.3 terminal A and power supply
- Fuel injector No.4 terminal A and body ground
- Fuel injector No.4 terminal A and power supply
- Fuel injector No.1 terminal B and body ground
- Fuel injector No.2 terminal B and body ground
- Fuel injector No.3 terminal B and body ground
- Fuel injector No.4 terminal B and body ground
Leakage Inspection
WARNING:
- Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.
1. Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. Before Service Precaution
2. Remove the battery cover. Removal and Replacement
3. Disconnect the negative battery cable.
4. Remove the fuel injector and fuel distributor as a single unit. Service and Repair
5. Fix the fuel injector to the fuel distributor with a wire or the equivalent.
6. Connect the fuel hose.
7. Connect the negative battery cable.
8. Ground the following PCM terminal 1BG using a jumper wire.
9. Turn the ignition switch to the ON position to start the fuel pump.
10. Tilt the fuel injector at an angle of 42° to inspect for leakage.
- If not within the specification, replace the fuel injector. Service and Repair
Leakage amount
- Less than 1 drop/2 min
11. Turn the ignition switch to the LOCK position to stop the fuel pump and disconnect the jumper wire.
12. Remove the wire or equivalent securing the fuel injector.
13. Install the fuel injector. Service and Repair
14. Inspect all related parts by performing "AFTER SERVICE PRECAUTION". After Service Precaution
Injection Volume Inspection
WARNING:
- Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.
1. Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. Before Service Precaution
2. Remove the battery cover. Removal and Replacement
3. Disconnect the negative battery cable.
4. Remove the PCM. Service and Repair
5. Connect the PCM connector.
6. Remove the fuel injector and fuel distributor as a single unit. Service and Repair
7. Fix the fuel injector to the fuel distributor with a wire or the equivalent.
8. Connect the corresponding fuel injector connector.
9. Connect the negative battery cable.
10. Ground the following PCM terminal 1BG using a jumper wire.
11. Turn the ignition switch to the ON position to start the fuel pump.
12. Ground the following PCM terminals using a jumper wire and measure the injection volume of each fuel injector.
- If not within the specification, replace the fuel injector. Service and Repair
Injection volume
- 275-312 ml {275-312 cc, 16.8-19.0 cu in}/min
13. Turn the ignition switch to the LOCK position to stop the fuel pump and disconnect the jumper wire.
14. Remove the wire or equivalent securing the fuel injector.
15. Install the fuel injector. Service and Repair
16. Inspect all related parts by performing "AFTER SERVICE PRECAUTION". After Service Precaution
Atomization Inspection
1. Inspect the atomization status.
- If not normal, replace the fuel injector.