Fuel Pressure Sensor and Its Circuit Check
Precautions: Precautions for Fuel System Service · General safety (00)
NOTE:
This procedure is to troubleshoot only open, short to ground circuit and short to power supply circuit of fuel injector circuit. If it is necessary to troubleshoot for injector operation, perform High-Pressure Fuel Supply Circuit Check:K14C.
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A3: | Fuel pressure sensor ground circuit | 3. | To Map sensor |
| A1: | Fuel pressure sensor and MAP sensor power supply circuit | 1. | Fuel pressure sensor | ||
| A2: | Fuel pressure sensor signal circuit | 2. | ECM |
Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Fuel pressure sensor circuit check
1)Remove intake manifold.
2)When ignition is “OFF”, disconnect “C01” and “E01” connectors of ECM and fuel pressure sensor connector.
3)Check for proper terminal connection to “C01” and “E01” connectors and fuel pressure sensor connector.
4)If connections are OK, check the following points.
•Resistance of “A1”, “A2” and “A3” circuits: less than 1 Ω
•Resistance between each of “A1”, “A2” and “A3” circuits and ground: infinity •Resistance between “A1” circuit terminal and other terminal at fuel pressure sensor connector: infinity •Resistance between “A2” circuit terminal and other terminal at fuel pressure sensor connector: infinity •Resistance between “A3” circuit terminal and other terminal at fuel pressure sensor connector: infinity •Voltage of “A1”, “A2” and “A3” circuits: 0 to 1 V (When ignition is “ON”) Is check result OK?
|
Go to Step 2.
|
Repair or replace defective wire harness.
|
| 2 |
Fuel pressure sensor check
1)Check fuel pressure sensor.
Is check result OK?
|
End.
|
Replace fuel delivery pile (incorporating fuel pressure sensor).
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