Fuel Flow Actuator Operation Check
Precautions: General safety (00)
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B1: | Fuel pressure sensor power supply circuit | 1. | ECM |
| A1: | Fuel flow actuator power supply circuit | B2: | Fuel pressure sensor signal circuit | 2. | Fuel flow actuator |
| A2: | Fuel flow actuator drive circuit | B3: | Fuel pressure sensor ground circuit | 3. | Fuel pressure sensor |
Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Fuel flow actuator power supply circuit and drive circuit check
1)When ignition is “OFF”, disconnect “D01” connector from ECM and fuel flow actuator connector.
2)Check for proper terminal connection to “D01” connector and fuel flow actuator connector.
3)If connections are OK, check the following points.
•Resistance of “A1” and “A2” circuits: less than 1 Ω
•Resistance between “A1” circuit and ground: infinity •Resistance between “A2” circuit and ground: infinity •Resistance between “A1” circuit terminal and other terminal at fuel flow actuator connector: infinity •Voltage of “A1” and “A2” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 2.
|
Repair defective wire harness.
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| 2 |
Fuel flow actuator check
1)When ignition is “OFF”, connect “D01” connector to ECM and fuel flow actuator connector.
2)Check fuel flow actuator.
Is check result OK?
|
Check low-pressure fuel supply circuit and high-pressure fuel supply circuit.
•Low-pressure fuel supply circuit:
•High-pressure fuel supply circuit: |
Replace high pressure pump.
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