Test Conditions:

The battery voltage must be at least 11.5 V. Charge if necessary. Refer to BATTERY .
Fuel Pump Control Module -J538- fuse OK. Refer to appropriate Wiring Diagram. .
Fuel Pump Control Module -J538- is OK use the Vehicle Diagnostic Tester.

Test Sequence:

NOTE:

The output diagnostic test mode checks the fuel pump function.

-- Follow all safety precautions. Refer to SAFETY PRECAUTIONS .

-- Follow the guidelines for clean working conditions. Refer to FUEL SYSTEM GUIDELINES FOR CLEAN WORKING CONDITIONS .

-- Connect the Vehicle Diagnostic Tester -1- as follows:

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-- Connect the diagnostic cable connector -2- to the diagnostic connection inside the driver footwell.

-- Switch the ignition on.

-- Select the fuel pump output diagnostic test mode in OBD.

The fuel pump must now accelerate slowly up to the maximum RPM.

NOTE:

The fuel pump runs very quietly.

If the output diagnostic test mode is performed several times in succession, it may be necessary to briefly start the motor before repeating the output diagnostic test mode.

-- Switch off the ignition.

If the Fuel Pump Does Not Start:

-- Remove the bench seat. Refer to REAR SEATS .

-- Pull on the connector on the Fuel Pump Control Module -J538- without pushing the locking mechanism to make sure it is secure. Repeat the fuel pump functionality test if the connector was not connected correctly.

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-- Disconnect the connector from the Fuel Pump Control Module -J538-.

-- Check the contacts on the connector and on the Fuel Pump Control Module -J538- for damage.

-- Check the voltage supply between contacts -1 and 6- using the analog/digital multimeter. Refer to appropriate Wiring Diagram.

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Specified value: approximately battery voltage

Voltage Supply Not OK:

-- Locate and repair the open circuit according to the wiring diagram. Refer to appropriate Wiring Diagram.

Voltage Supply OK:

-- Unclip the cover -1- at the tabs in direction of -arrows- using the :3409 .

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-- Pull on the connector -1- without pressing the release to make sure the locking mechanism is secure. Repeat the fuel pump function test if the connector was not connected correctly.

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-- Remove the connector -1-.

-- Check the contacts on the connector and on the fuel delivery unit for damage.

-- Drain the fuel tank. Refer to FUEL TANK, DRAINING .

-- Remove the fuel line -2- from the fuel delivery unit flange -3-. Disconnect the connector couplings. Refer to CONNECTOR COUPLINGS, DISCONNECTING .

CAUTION:

The fuel system is under pressure.

Risk of injury from fuel spraying out.

- Wear protective eyewear.

- Wear safety gloves.

- Reduce the pressure: place clean cloths around the connection point and carefully open the connection point.

-- Open the locking ring using the :T10202 .

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-- Do not bend the :T10202 and push hard on the locking ring. If the wrench slides down, the fuel delivery unit can be damaged.

-- Check if the wiring between the flange and fuel pump is connected.

-- Inspect the contacts for damage.

If No Open Circuits Are Found:

-- If the fuel pump is faulty, replace the fuel delivery unit. Refer to FUEL DELIVERY UNIT/FUEL LEVEL SENSOR, REMOVING AND INSTALLING .