Fuel Pump Control Module - J538- / Transfer Fuel Pump - G6-, TESTING
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: .
- View 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:
|