Fuel Pump Control Module -J538- / Transfer Fuel Pump -G6-, CHECKING
WARNING: This page is about a different car, the 2014 Audi A8 Quattro and 2013 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.
Function
The Engine Control Module -J623- tells the Fuel Pump Control Module -J538- the demand needed for fuel volume and pressure and activates the Transfer Fuel Pump -G6-. The Transfer Fuel Pump -G6- transfers fuel to the rest of the fuel system, where it is monitored by the Engine Control Module -J623- through sensors, and controlled through regulators and/or metering valves.
Special tools and workshop equipment required
- Multimeter
- Wiring Diagram
- Scan Tool
Test requirements
- Fuses OK.
- Battery voltage OK.
- Switch OFF all electrical and electronic accessories.
- Vehicles with Auto. Transmission, ensure Selector Lever position is in "P".
- Vehicles with Man. Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
- Coolant Temperature: ≥ 80°C.
- Observe all safety precautions: SAFETY PRECAUTIONS .
- View clean working conditions: CLEAN WORKING CONDITIONS .
Test Procedure
NOTE:
When the door is opened or the Ignition is turned to the ON position the fuel pump is activated for 2 seconds to build up the pressure in the fuel system.
| Step | Procedure | Result / Action to Take |
|---|---|---|
| 1 |
|
-- YES:
-- NO:
|
| 2 |
|
-- YES:
|
| 3 |
|
-- YES:
-- NO:
|
| 4 |
|
-- YES:
|
| 5 |
|
-- YES:
-- NO:
|
| 6 |
|
-- YES:
|
| 7 |
|
-- YES:
|