1. FUEL PUMP ASSEMBLY OPERATION
Check fuel pressure.
Start the engine.
Check that the fuel pressure fluctuates when the target fuel pressure changes.
| Active Test Display |
|---|
| Control the Target Fuel Pressure Offset |
| Data List Display |
|---|
| Fuel Pressure (High) |
The target fuel pressure operation decreases the target fuel pressure by 12.5% or increases the target fuel pressure by 24.8%.
If the result is not as specified, replace the fuel pump assembly or fuel pressure sensor.
Check operating sound.
Remove the No. 1 engine cover sub-assembly.
Start the engine.
Using a sound scope, check the operating sound of the fuel pump assembly.
If no sound can be heard, check the fuel pump assembly, wire harness and ECM.
Stop the engine.
Install the No. 1 engine cover sub-assembly.