Circuit Description
The suction control valve (SCV) is on the fuel supply pump and controls the suction fuel quantity to the fuel rail. The SCV is fully opened in normal state, and increased drive current results in closing the orifice. The engine control module (ECM) calculates the desired fuel rail pressure and fuel flow rate, and compares the desired fuel rail pressure to the actual rail pressure to determine the SCV position. When the actual fuel rail pressure is higher than the desired value, the SCV is closed to decrease the flow rate. If the ECM detects an excessively high SCV solenoid drive current, this DTC will set.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0092 Fuel Pressure Regulator Solenoid 1 Control Circuit High Voltage
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The battery voltage is between 10-16 volts. |
| • | The fuel supply pump is normal. |
| • | The SCV operating duty is between 20-50 percent. |
| • | The deviation of the SCV operating duty is less than 10 percent. |
Conditions for Setting the DTC
The SCV solenoid operating current is more than 2700 mA.
Action Taken When the DTC Sets
| • | The ECM illuminates the malfunction indicator lamp (MIL) and reduced engine power indicator lamp, if equipped, when the diagnostic runs and fails. |
| • | The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records. |
| • | The ECM limits accelerator operating range. |
| • | The ECM limits fuel injection quantity. |
| • | The ECM limits fuel rail pressure. |
| • | The ECM closes the exhaust gas recirculation (EGR) valve and stops the EGR control. |
| • | The ECM inhibits cruise control. |
Conditions for Clearing the DTC
| • | The MIL resets when the ignition is turned OFF. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | Clear the MIL and the DTC with a scan tool. |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Engine Controls Schematics | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 1 | |
2 |
Does the DTC fail this ignition? | -- | Go to Step 3 | Go to Intermittent Conditions |
3 |
Is the resistance within the specified range? | 1.9-2.3 ohms at 20°C (68°F) | Go to Step 4 | Go to Step 7 |
4 |
Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 5 |
5 |
Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 6 |
6 |
Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 8 |
7 |
Important: The SCV is part of the fuel supply pump. Replace the fuel supply pump. Refer to Fuel Injection Pump Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
8 |
Important: The new ECM must be programmed. Replace the ECM. Refer to, Engine Control Module Replacement/Restore Fuel Rate Data , and Fuel Injector Flow Rate Programming . Did you complete the replacement? | -- | Go to Step 9 | -- |
9 |
Did the DTC fail this ignition? | -- | Go to Step 2 | Go to Step 10 |
10 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | -- | System OK | |
