2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1023

2.3. Test signal voltage of component B28 (Pressure sensor).

Figure legend

- A -ConnectionTest cable 35-pin socket box

- 001 -Sockets of component N3/10 (ME-SFI [ME] control unit)

- 05 -35-pin socket box

- 050 -126-pin socket box

- 108 -Test cable 266 589 01 63 00

- N3/10 (ME-SFI [ME] control unit)

- II 1-63ConnectionTest cable

- III 64-126ConnectionTest cable

Warning!

- Connection A of test cable 108 may NOT be connected to connection B of the 126-pin socket box (050).

Continue to test with button F2

Figure legend

- B28 (Pressure sensor)

- 126/1 -'Secondary air injection left bank of cylinders' shutoff valve

Test prerequisite

- The power supply of component B28 (Pressure sensor) is OK.

Test sequence

- Switch off ignition.

- Connect the vacuum tester to the input of component B28 (Pressure sensor) with the 3 x distributor.

- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).

- Measure direct voltage with multimeter between sockets [ M.15 ] 15 and [ M.86 ] 86 of the 126-pole socket box tester.

- Switch on ignition.

Specified values

- Ignition ON: >3.5 V

- Operate engine at idling speed.(Vacuum> 500 mbar):< 2 V

Question

- Are the measurement values OK?