Lower Fuel Pressure, Checking With High Pressure Pump

WARNING: This page is about a different variant/trim than selected.

NOTE:

Fuel pump (FP) control module OK

Fuel Pump (FP) OK

Fuel filter OK

Battery voltage at least 11 Volts

-- Switch on ignition.

-- Connect Vehicle Diagnosis and Service SystemVAS 5052 and select the engine control module.

-- Select "engine electronics" in OBD.

-- Then select "Measured values" read out.

-- Select measured value block 103.

-- During ignition, the fuel low pressure is displayed in field 1.

NOTE:

By switching the ignition off and on the Fuel Pump (FP) Control Module -J538- activates the fuel pump for several seconds.

-- Measure fuel pressure.

-- If specified value is not attained, check the delivery rate of the electrical fuel pump. Refer to Diagnosis and Testing

-- Check fuel pressure and residual pressure with Fuel Inj. Pressure Gauge-CIS V.A.G 1318. Refer to FUEL PRESSURE AND RESIDUAL PRESSURE BEFORE HIGH PRESSURE PUMP, CHECKING .