Fuel Injector Inspection

FUEL INJECTOR INSPECTION

Operation Test

1. Carry out the "Fuel Injector Operation Inspection".
- If not as specified, perform following inspections for the fuel injectors.

Resistance Inspection

NOTE: Perform the following procedure only when directed.

1. Turn the ignition switch to the LOCK position.
2. Disconnect the negative battery cable.
3. Disconnect the fuel injector connectors.




4. Measure the resistance of the fuel injector using an ohmmeter.
- If not as specified, replace the fuel injector.
- If as specified but "Operation Test" is failed, carry out the "Circuit Open/Short Inspection". Inspect for open or short circuit.

Resistance
13.1 - 14.5 ohms [20 °C {68 °F}]

Circuit Open/Short Inspection




1. Disconnect the PCM connector.
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.
- No.1 cylinder fuel injector terminal 1 and PCM terminal 76
- No.2 cylinder fuel injector terminal 1 and PCM terminal 50
- No.3 cylinder fuel injector terminal 1 and PCM terminal 75
- No.4 cylinder fuel injector terminal 1 and PCM terminal 49
- No.5 cylinder fuel injector terminal 1 and PCM terminal 74
- No.6 cylinder fuel injector terminal 1 and PCM terminal 48
- No. 1 cylinder fuel injector terminal 2 and main relay terminal C through common connector
- No.2 cylinder fuel injector terminal 2 and main relay terminal C through common connector
- No.3 cylinder fuel injector terminal 2 and main relay terminal C through common connector
- No.4 cylinder fuel injector terminal 2 and main relay terminal C through common connector
- No.5 cylinder fuel injector terminal 2 and main relay terminal C through common connector
- No.6 cylinder fuel injector terminal 2 and main relay terminal C through common connector

Short circuit

- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- No.1 cylinder fuel injector terminal 1 and body GND
- No.2 cylinder fuel injector terminal 1 and body GND
- No.3 cylinder fuel injector terminal 1 and body GND
- No.4 cylinder fuel injector terminal 1 and body GND
- No.5 cylinder fuel injector terminal 1 and body GND
- No.6 cylinder fuel injector terminal 1 and body GND
- No.1 cylinder fuel injector terminal 2 and power supply
- No.2 cylinder fuel injector terminal 2 and power supply
- No.3 cylinder fuel injector terminal 2 and power supply
- No.4 cylinder fuel injector terminal 2 and power supply
- No.5 cylinder fuel injector terminal 2 and power supply
- No.6 cylinder fuel injector terminal 2 and power supply

Fuel Leakage Test

WARNING: FUEL LINE SPILLS AND LEAKAGE ARE DANGEROUS. FUEL CAN IGNITE AND CAUSE SERIOUS INJURIES OR DEATH AND DAMAGE. ALWAYS CARRY OUT THE FOLLOWING PROCEDURE WITH THE ENGINE STOPPED.

NOTE: Perform the following test only when directed.

1. Complete the "BEFORE REPAIR PROCEDURE".
2. Disconnect the negative battery cable.
3. Remove the fuel injectors together with the fuel distributor connected to fuel hose.




4. Fasten the fuel injectors firmly to the fuel distributor with wire.
5. Connect the negative battery cable.

CAUTION: Connecting to the wrong check connector terminal may cause a malfunction. Carefully connect only to the specified terminal.




6. Short the check connector terminal F/P to body GND using a jumper wire.
7. Turn the ignition switch to the ON position to operate the fuel pump.




8. Tilt the fuel injectors approx. 60 °.
9. Verify that fuel leakage from the fuel injector nozzles is within the specification.
- If not as specified, replace the fuel injector.

Fuel leakage
Less than 1 drop/2 min

10. Turn the ignition switch to the LOCK position and remove the jumper wire.
11. Complete the "AFTER REPAIR PROCEDURE".

Volume Test

WARNING: FUEL LINE SPILLS AND LEAKAGE ARE DANGEROUS. FUEL CAN IGNITE AND CAUSE SERIOUS INJURIES OR DEATH AND DAMAGE. ALWAYS CARRY OUT THE FOLLOWING PROCEDURE WITH THE ENGINE STOPPED.

NOTE:
- If there is an after market fuel injector tester, perform the following procedure.
- If there is no an aftermarket fuel injector tester, perform "Operation Test", "Resistance Inspection", and "Fuel Leakage Test" to verify the fuel injector is okay or not.

1. Complete the "BEFORE REPAIR PROCEDURE".
2. Disconnect the negative battery cable.
3. Remove the fuel injectors.
4. Connect the fuel injector to the fuel injector tester.
5. Measure the injection volume of each fuel injector using a graduated container.
- If not as specified, replace the fuel injector.

Injection volume
49 - 65 ml {49 - 65 cc, 1.7 - 2.1 fl oz.}/15 s

6. Turn the ignition switch to the LOCK position and disconnect the jumper wire.
7. Complete the "AFTER REPAIR PROCEDURE".

Atomization




1. Inspect atomization pattern.
- If the atomization is faulty, replace the fuel injector.