1.4 TSI engine (EA111) · Mixture preparation – injection · Senders and sensors

Checking fuel pressure sender

Special tools and workshop equipment required

  • Assembly tool - T10118-
  • Double hex socket 1/2”, 27 mm - VAS 5301/7-
  • Digital pressure gauge - VAS 6394/1-
  • Test adapter - VAS 5570-

Prior to opening the high-pressure area, e.g. when removing the high-pressure pump, fuel rail, injectors, a fuel line, or the fuel pressure sender - G247-, the fuel pressure in the highpressure area must be reduced to a residual pressure of approx. 6 bar. The appropriate procedure is described in the chapter on releasing pressure in the high-pressure section ⇒ 2.3 Releasing pressure in high-pressure area.

Procedure

  • Remove fuel pressure sender - G247- -1-.
  • Instead of fuel pressure sender - G247-, screw in adapter - VAS 6394/2- and tighten to 22 Nm.
  • Open cover -2- of digital pressure gauge - VAS 6394/1- and tighten fuel pressure sender - G247- to digital pressure gauge to 22 Nm.
  • Screw pressure line -1- of digital pressure gauge - VAS 6394/1- hand-tight to adapter - VAS 6394/2-.
  • Connect test adapter - VAS 5570- between fuel pressure sender - G247- -1- and connector.
  • Connect vehicle diagnosis, testing and information system - VAS 5051B- -1- as follows:
  • Push diagnostic cable connector -2- onto diagnostic connection in driver footwell.
  • Switch on ignition.

Engine control units KWP (Keyword Protocol)

  • Press following keys on display in succession:

Vehicle self-diagnosis

Vehicle self-diagnosis

01 - Engine electronics

011 - Measured values

  • Enter '248' (or '140' for engine code CKMA) and confirm with Q.

Display field 3 shows the actual value reported to the vehicle by the fuel pressure sender - G247-.

Engine control units UDS (Unified Diagnostic Service)

  • Press following keys on display in succession:

Guided function

  • Confirm the test version and the brand.
  • Specify vehicle model.
  • Select model year.
  • Determine engine version.
  • Specify “engine” as vehicle system to be used.

Read measured values

  • Follow the programmed steps of the tester until step »Select displayable measured values«.
  • Search for “IDE00589 Fuel Pressure” in plain text.

Done

Read

Continuation for all engine control unit versions:

  • Switch on digital pressure gauge - VAS 6394/1- by pressing key -A- briefly once.

Digital pressure gauge - VAS 6394/1- should display 0 bar; if this is not the case, press key -C- briefly once for zero point compensation.

  • Start engine.
  • Compare pressure displayed by digital pressure gauge - VAS 6394/1- with actual value of vehicle diagnosis, testing and information system - VAS 5051B-.

The pressures may deviate by up to 5 bar.

If pressures do not correspond, fuel pressure sender - G247- must be renewed.

Prior to opening the high-pressure area, e.g. when removing the high-pressure pump, fuel rail, injectors, a fuel line, or the fuel pressure sender - G247-, the fuel pressure in the highpressure area must be reduced to a residual pressure of approx. 6 bar. The appropriate procedure is described in the chapter on releasing pressure in the high-pressure section ⇒ 2.3 Releasing pressure in high-pressure area.

  • Renew fuel pressure sender - G247- and again compare both measured values.

If measured values again fail to correspond:

  • Check wiring ⇒ Vehicle diagnostic tester.

If measured values correspond:

  • Further testing is carried out with “Guided Fault Finding” in ⇒ Vehicle diagnostic tester.