2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 657

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

- Measure direct current with multimeter between sockets (F.4) 100 and [M.53] 53 of the 126-pole socket box tester.

- Switch on ignition.

Specified value

- Amperage[0.3...0.6] A

Question

- Is the measurement value OK?

YES

The measurement value is OK.End of test

NO

The measurement value is not OK.Possible cause and remedy

- N10/1f57 (Fuse 57)

- N10/1kI (Circuit 87 relay, engine)

- Line between component N3/10 (ME-SFI [ME] control unit) and component Y32 (Air pump switchover valve)

- Line between component N10/1 (Driver-side SAM control unit with fuse and relay module) and component Y32 (Air pump switchover valve)

- Y32 (Air pump switchover valve)

End of test

0821

The secondary air valve (cylinder bank 2) is jammed open. (P2442)

Possible cause:

- Y32 (Air pump switchover valve)

Affected functions:

- Engine diagnosis

-------------------------------------------------

Test 1: Check component Y32 (Air pump switchover valve).

1. Check component Y32 (Air pump switchover valve).

Test 1.1: Test actuation of component Y32 (Air pump switchover valve).

Test 1.2: Test current consumption of component Y32 (Air pump switchover valve).

1.1. Test actuation of component Y32 (Air pump switchover valve).

Test sequence

- Switch on ignition.

- Actuate component Y32 (Air pump switchover valve).(Proceed to 'Actuation' with F2)

Warning!Communication with ECU required.

1.2. Test current consumption of component Y32 (Air pump switchover valve).

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