Jetta Sedan L5-2.5L (CBTA) (2009)
‹› Specified value: 3.5 to 6 bar
If specification is exceeded:
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Check return line between fuel filter and fuel pump for kinks or blockage.
If no malfunction in fuel return line is found:
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Pressure relief valve in fuel filter is malfunctioning.
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Replace the fuel filter.
If specification is not obtained:
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Check fuel pressure at the fuel filter between fuel pump and fuel filter using appropriate adapters
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Open shut off valve on gauge and start the engine. Allow to idle.
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Slowly close the pressure gauge shut off and note the fuel pressure.
‹› Pressure must increase to 6 bar.
When 6 bar is reached: Open shut off tap immediately!
If pressure has increased during test:
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Fuel pump is OK. Pressure relief valve in fuel filter is malfunctioning.
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Replace the fuel filter.
If pressure did not increase:
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Fuel pump is faulty
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Replace the fuel pump.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to --> [ Diagnostic Mode 03 - Read DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] See: Computers and Control Systems/Testing and
Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. Refer to --> [ Readiness Code ] See: Computers and Control Systems/Testing and
Inspection/Monitors, Trips, Drive Cycles and Readiness Codes.