Fuel Injector Inspection
FUEL INJECTOR INSPECTIONOperation Test
1. Carry out the "Fuel Injector Operation Inspection" (See 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 (See FUEL INJECTOR REMOVAL/INSTALLATION)
- 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 (See PCM REMOVAL/INSTALLATION)
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 A (harness-side) and PCM terminal 75
- No. 2 cylinder fuel injector terminal A (harness side) and PCM terminal 101
- No. 3 cylinder fuel injector terminal A (harness-side) and PCM terminal 74
- No. 4 cylinder fuel injector terminal A (harness side) and PCM terminal 100
- No. 5 cylinder fuel injector terminal A (harness-side) and PCM terminal 73
- No. 6 cylinder fuel injector terminal A (harness side) and PCM terminal 99
- No. 1 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector
- No.2 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.
- No.3 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.
- No.4 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.
- No.5 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) terminal C through common connector.
- No.6 cylinder fuel injector terminal B (harness-side) and main relay (harness-side) 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 A (harness-side) and body GND.
- No.2 cylinder fuel injector terminal A (harness-side) and body GND.
- No.3 cylinder fuel injector terminal A (harness-side) and body GND.
- No.4 cylinder fuel injector terminal A (harness-side) and body GND.
- No.5 cylinder fuel injector terminal A (harness-side) and body GND.
- No.6 cylinder fuel injector terminal A (harness-side) and body GND.
- No.1 cylinder fuel injector terminal B (harness-side) and power supply
- No.2 cylinder fuel injector terminal B (harness-side) and power supply.
- No.3 cylinder fuel injector terminal B (harness-side) and power supply.
- No.4 cylinder fuel injector terminal B (harness-side) and power supply.
- No.5 cylinder fuel injector terminal B (harness-side) and power supply.
- No.6 cylinder fuel injector terminal B (harness-side) 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". (See BEFORE REPAIR PROCEDURE.)
2. Disconnect the negative battery cable.
3. Remove the fuel injectors together with the fuel distributor connected to fuel hose. (See FUEL INJECTOR REMOVAL/INSTALLATION.)
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" (See 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" (See BEFORE REPAIR PROCEDURE )
2. Disconnect the negative battery cable
3. Remove the fuel injectors (See FUEL INJECTOR REMOVAL/INSTALLATION)
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" (See AFTER REPAIR PROCEDURE )
Atomization
1. Inspect atomization pattern
- If the atomization is faulty, replace the fuel injector