Fuel Injector Operation Inspection

Fuel Injector Operation Inspection

Fuel injector (FP1) (RP1) operation inspection
1. Start the engine and let it at idle.
2. Inspect fuel injector control signal wave profile at the following PCM terminals. (See PCM INSPECTION)
- Terminal 2M (front rotor)
- Terminal 2J (rear rotor)

3. If not as specified, inspect the following and repair or replace defective parts.
Front rotor:
- Open circuit in wiring between fuel injector (FP1) terminal A and main relay terminal C
- Open or short circuit in wiring between fuel injector (FP1) terminal B and PCM terminal 2M
- Open or short internal circuit or fuel injector (FP1)

Rear rotor:
- Open circuit in wiring between fuel injector (RP1) terminal A and main relay terminal C
- Open or short circuit in wiring between fuel injector (RP1) terminal B and PCM terminal 2J
- Open or short internal circuit of fuel injector (RP1)

Fuel injector (FS) (RS) operation inspection
1. Connect the M-MDS to the DLC-2.
2. Start the engine and let it at idle.
3. Access the RPM PID.
4. Verify that the fuel injector control wave is not outputted at the following PCM terminal. (See PCM INSPECTION.)
- Terminal 2G (front rotor)
- Terminal 2D (rear rotor)

5. If the fuel injector control signal is outputted, inspect the following and repair or replace defective parts.
- MAF sensor
- TP sensor
- IAT sensor

6. Inspect the fuel injector control signal wave profile at the following PCM terminals while the RPM PID is 5,000 rpm or over. (See PCM INSPECTION.)
- Terminal 2G (front rotor)
- Terminal 2D (rear rotor)

7. If not as specified, inspect the following and repair or replace defective parts.
Front rotor:
- Open circuit in wiring between fuel injector (FS) terminal A and main relay terminal C
- Open or short circuit in wiring between fuel injector (FS) terminal B and PCM terminal 2G
- Open or short internal circuit of fuel injector (FS)

Rear rotor:
- Open circuit in wiring between fuel injector (RS) terminal A and main relay terminal C
- Open or short circuit in wiring between fuel injector (RS) terminal B and PCM terminal 2D
- Open or short internal circuit or fuel injector (RS)

Fuel injector (FP2) (RP2) operation inspection (13B-MSP (High Power))
1. Connect the M-MDS to the DLC-2.
2. Start the engine and let it at idle.
3. Access the RPM PID.
4. Verify that the fuel injector control wave is not outputted at the following PCM terminals. (See PCM INSPECTION.)
- Terminal 3A (front rotor)
- Terminal 3D (rear rotor)

5. If the fuel injector control signal is outputted, inspect the following and repair or replace defective parts.
- MAF sensor
- TP sensor
- IAT sensor

6. Inspect the fuel injector control signal wave profile at the following PCM terminals while RPM PID is 5,000 rpm or more. (See PCM INSPECTION.)
- Terminal 3A (front rotor)
- Terminal 3D (rear rotor)

7. If not as specified, inspect the following and repair or replace defective parts.
Front rotor:
- Open circuit in wiring between fuel injector (FP2) terminal A and main relay terminal C
- Open or short circuit in wiring between fuel injector (FP2) terminal B and PCM terminal 3A
- Open or short internal circuit of fuel injector (FP2)

Rear rotor:
- Open circuit in wiring between fuel injector (RP2) terminal A and main relay terminal C
- Open or short circuit in wiring between fuel injector (RP2) terminal B and PCM terminal 3D
- Open or short internal circuit or fuel injector (RP2)