Fuel Injector on-Vehicle Inspection
Simulation Test1. Carry out the "Fuel injector Operation Inspection".
- If not as specified, perform the further inspection for the fuel injectors.
Resistance Inspection
NOTE: Perform the following test only when directed.
1. Turn the ignition switch off.
2. Disconnect the battery negative 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 "Simulation Test" is failed, carry out the "Circuit Open/Short Inspection".
Resistance [20 °C {68 °F}]
ZM: Approx.13.8 Ohms
FS: 14.2 - 14.8 Ohms
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Connect the SST (104 Pin Breakout Box) to the PCM as shown.
3. Tighten the connector attaching screw.
Tightening torque
7.9 - 10.7 N.m {80 - 110 kgf.cm, 69.5 - 95.4 in.lbf}
4. inspect for an open or short circuit in the following wiring harnesses by probing the applicable sensor and SST (104 Pin Breakout Box) terminals with ohmmeter leads.
Open circuit
- GND circuit (NO.1 cylinder fuel injector connector terminal B and PCM connector terminal 75)
- GND circuit (NO.2 cylinder fuel injector connector terminal B and PCM connector terminal 101)
- GND circuit (NO.3 cylinder fuel injector connector terminal B and PCM connector terminal 74)
- GND circuit (NO. cylinder fuel injector connector terminal B and PCM connector terminal 100)
- Power circuit (NO.1 cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
- Power circuit (NO.2 cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
- Power circuit (NO.3 cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
- Power circuit (NO. cylinder fuel injector connector terminal A and main relay connector terminal D through common connector)
Short circuit
- NO.1 cylinder fuel injector connector terminal B and PCM connector terminal 75 to GND
- NO.2 cylinder fuel injector connector terminal B and PCM connector terminal 101 to GND
- NO.3 cylinder fuel injector connector terminal B and PCM connector terminal 74 to GND
- NO. cylinder fuel injector connector terminal B and PCM connector terminal 100 to GND
5. Repair or replace faulty areas.
6. Reconnect the fuel injector connectors.
7. Reconnect the battery negative cable.
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 battery negative cable.
3. Remove the fuel injectors together with the fuel distributor.
4. Fasten the fuel injectors firmly to the fuel distributor with wires.
5. Connect the battery negative cable.
CAUTION: Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the specified terminal only.
6. Short the DLC terminal F/P to the body GND using a jumper wire.
7. Turn the ignition switch to ON position to operate the fuel pump body.
8. Tilt the fuel injectors approx. 60 degrees and 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 minutes
9. Turn the ignition switch off and remove the jumper wire.
10. 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:
- Perform the following test only when directed.
- If you have an after market fuel injector tester or SST (49 L018 901), perform this inspection.
- If there is no an after market fuel injector tester available, perform "Simulation Test", "Resistance Inspection", and "Fuel Leakage Inspection" to verify whether the fuel injector is okay or not.
1. Complete the "BEFORE REPAIR PROCEDURE".
2. Disconnect the battery negative cable.
Using the SST
1. Remove the fuel injectors together with the fuel distributor with connected to fuel hose.
2. Fasten the fuel injectors firmly to the fuel distributor with wires.
3. Connect the fuel injector to the SST or the fuel injector tester as shown in the figure.
4. Connect the battery negative cable.
CAUTION: Connecting the wrong DLC terminal may possibly cause a malfunction. Carefully connect the specified terminal only.
5. Short the DLC terminal F/P to body GND using a jumper wire.
6. Turn the ignition switch to ON position.
7. Measure the injection volume of each fuel injector using a graduated container.
- If not as specified, replace the fuel injector.
Injection volume
ZM: 38.1 - 40.4 ml {38.1 - 40.4 cc, 1.29 - 1.36 fl oz}/15 s
FS: 68 - 75 ml {68 - 75 cc, 2.30 - 2.53 fl oz}/15 s
8. Turn the ignition switch to LOCK position.
9. Disconnect the battery negative cable.
10. Disconnect the SST or the fuel injector tester from the fuel injector.
11. Disconnect the jumper wire.
12. Complete the "AFTER REPAIR PROCEDURE".
Using a Fuel Injector Tester
1. Remove the fuel injectors.
2. Connect the fuel injector to a fuel injector tester.
3. Measure the injection volume of each fuel injector.
- If not as specified, replace the fuel injector.
Injection volume
ZM: 38.1 - 40.4 ml {38.1 - 40.4 cc, 1.29 - 1.36 fl oz}/15 s
FS: 68 - 75 ml {68 - 75 cc, 2.3 - 2.5 fl oz}/15 s
4. Complete the "AFTER REPAIR PROCEDURE".