Fuel Injector: Testing and Inspection

FUEL INJECTOR INSPECTION [MZI-3.7]

Resistance Inspection

1. Turn the ignition switch to LOCK position.

2. Disconnect the negative battery cable. Removal and Replacement

3. Remove the engine cover. Service and Repair

4. Remove the dynamic chamber. Service and Repair

5. Disconnect the fuel injector connectors.

6. Measure the resistance of the fuel injector.






Fuel injector resistance
- 11.3-12.7 ohms

- If not as specified, replace the fuel injector. Service and Repair
- If as specified, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection

1. Disconnect the PCM connector.

2. Inspect the following wiring harness for open or short (continuity check).













Open circuit

- If there is no continuity, the circuit is open. Repair or replace the harness.

- No.1 cylinder fuel injector terminal A and PCM terminal 2BQ
- No.2 cylinder fuel injector terminal A and PCM terminal 2BC
- No.3 cylinder fuel injector terminal A and PCM terminal 2AY
- No.4 cylinder fuel injector terminal A and PCM terminal 2BG
- No.5 cylinder fuel injector terminal A and PCM terminal 2BL
- No.6 cylinder fuel injector terminal A and PCM terminal 2BI
- No.1 cylinder fuel injector terminal B and fuel pump relay terminal D
- No.2 cylinder fuel injector terminal B and fuel pump relay terminal D
- No.3 cylinder fuel injector terminal B and fuel pump relay terminal D
- No.4 cylinder fuel injector terminal B and fuel pump relay terminal D
- No.5 cylinder fuel injector terminal B and fuel pump relay terminal D
- No.6 cylinder fuel injector terminal B and fuel pump relay terminal D

Short circuit

- If there is continuity, the circuit is short. Repair or replace the harness.

- No.1 cylinder fuel injector terminal A and body ground
- No.2 cylinder fuel injector terminal A and body ground
- No.3 cylinder fuel injector terminal A and body ground
- No.4 cylinder fuel injector terminal A and body ground
- No.5 cylinder fuel injector terminal A and body ground
- No.6 cylinder fuel injector terminal A and body ground
- No.1 cylinder fuel injector terminal B and power supply
- No.2 cylinder fuel injector terminal B and power supply
- No.3 cylinder fuel injector terminal B and power supply
- No.4 cylinder fuel injector terminal B and power supply
- No.5 cylinder fuel injector terminal B and power supply
- No.6 cylinder fuel injector terminal B and power supply