Fuel Pump, Checking
- Battery voltage at 12.5 V
- Fuse for Fuel Pump (FP) on fuse holder OK. Refer to appropriate SYSTEMS WIRING DIAGRAM
-- Switch ignition on.
- Fuel Pump (FP) must briefly start up audibly.
Fuel Pump (FP) runs quietly.
-- Switch off ignition.
If Fuel Pump (FP) does not start up
-- Remove seat bench.
-- Unclip cover -1- from fuel delivery unit. Arrow -2- points in direction of travel.
On vehicles with auxiliary heater, harness connector of Metering Pump -V54- must also be disconnected.
-- Disconnect connector -1-.
-- Connect Low current voltage tester to outer terminals of connector.
-- Switch ignition on.
- LED must light up briefly.
If LED does not light up briefly:
-- Locate and repair open circuit in wiring.
LED lights up briefly, voltage supply OK
-- Remove fuel delivery unit.
-- Check if electrical wiring between flange and fuel pump is connected.
-- If no malfunction is detected in electrical circuit, replace the fuel pump. Refer to.
-- Assembly is performed in the reverse of the removal.
Final Procedures
After the repair work, the following work steps must be performed in the following sequence:
- Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
- If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
- If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .