2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1320

The idle speed with warm engine is below the permissible range limit. (P1999)

Possible cause:

- M16/6 (Throttle valve actuator)

- Inspect the intake system of the engine for leaks.

Affected functions:

- Engine output

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Test 1: Check component M16/6 (Throttle valve actuator).

Test 2: Check air filter and intake tract for blockage.

1. Check component M16/6 (Throttle valve actuator).

Test 1.1: Check internal resistance of component M16/6 (Throttle valve actuator).

Test 1.2: Test voltage supply of the potentiometers of component M16/6 (Throttle valve actuator).

Test 1.3: Check component M16/6 (Throttle valve actuator) using actual value.

Test 1.4: Check component M16/6m1 (Actuator motor) by means of actuation.

Test 1.5: Check internal resistance of component M16/6m1 (Actuator motor).

1.1. Check internal resistance of component M16/6 (Throttle valve actuator).

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