OPERATION
- Power is supplied to the injector (terminal No. 1) from the engine control relay (terminal No. 1).
- The engine-A/T-ECU (terminal No. 14) makes the power transistor in the unit be in "ON" position, and that makes currents go on the injector (terminal No. 2).
FUNCTION
- The engine-A/T-ECU controls the power supply interval of the injector.
- The fuel injection amount of the injector depends on the power supply interval.
TROUBLE JUDGMENT
Check Conditions
- While engine is running.
- Injector operation (by carrying out actuator test) is not in progress. <Vehicles except for Hong kong>
Judgment Criterion
- Injector coil surge voltage (battery positive voltage + 2 V) has not been detected for 2 seconds.
PROBABLE CAUSE
- Failed No. 3 injector
- Open/short circuit in No. 3 injector circuit or loose connector contact
- Failed engine-A/T-ECU
)
Q: Is the check result normal?
YES:
Go to Step 3 
.NO: Repair.
- Disconnect connector, and measure at harness side.
- Ignition switch: ON
- Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 6 .NO: Go to Step 5
.)
Q: Is the check result normal?
YES:
- Check and repair harness between B-17X (terminal No. 1) engine control relay connector and B-04 (terminal No. 1) No. 3 injector connector.
- Check power supply line for open/short circuit.
Q: Is the check result normal?
YES:
Go to Step 7 .NO: Repair.
- Check power supply line for damage.
Q: Is the check result normal?
YES:
Go to Step 8 .NO: Repair.
)
Q: Is the check result normal?
YES:
Go to Step 9 .NO: Repair.
- Check output line for open/short circuit and damage.
Q: Is the check result normal?
YES:
Go to Step 10 .NO: Repair.
- Engine: Idling
- Transmission: P range
- Voltage between terminal No. 14 and earth.
OK: Waveform should be display on Inspection procedure using an oscilloscope (Refer
to 
).
).Q: Is the check result normal?
YES:
Intermittent malfunction (Refer to GROUP 00 -
How to Use Troubleshooting/Inspection
Service Points ).NO: Replace engine-A/T-ECU.