0204

The safety fuel shutoff is active. (P2176)


Possible cause:

- M16/6 (Throttle valve actuator)
Affected functions:

- Engine diagnosis
- Engine running

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

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

Test 1.1: Check component B37 (Accelerator pedal sensor).

Test 1.2: Check component M16/6 (Throttle valve actuator).

Test 1.3: Perform mechanical inspection of component M16/6 (Throttle valve actuator).

1.1. Check component B37 (Accelerator pedal sensor).

Test 1.1.1: Check component B37 (Accelerator pedal sensor) using actual value.

Test 1.1.2: Check power supply of component B37 (Accelerator pedal sensor).

1.1.1. Check component B37 (Accelerator pedal sensor) using actual value.
Test sequence

- Switch on ignition.
Status of the relevant actual values:
- B37 (Pedal value sensor) Voltage 1:Warning! Communication with ECU required.
- B37 (Pedal value sensor) Voltage 2:Warning! Communication with ECU required.
Specified values

- Accelerator pedal position:Idle speed
- B37 (Accelerator pedal sensor)Signal1 : [0.2...0.5] V
- B37 (Accelerator pedal sensor)Signal2 : [0.1...0.5] V

- Accelerator pedal position:Kickdown
- B37 (Accelerator pedal sensor)Signal1 : [4.3...4.8] V
- B37 (Accelerator pedal sensor)Signal2 : [2.1...2.5] V
Question

- Are the actual values o.k.?


YES
The actual values are okay.End of test

NO
The actual values are not okay.Possible cause and remedy

- Check power supply of component B37 (Accelerator pedal sensor).
- Check lines from component N3/10 (ME-SFI [ME] control unit) to component B37 (Accelerator pedal sensor).
- B37 (Accelerator pedal sensor)


1.1.2. Check power supply of component B37 (Accelerator pedal 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







Test prerequisite

- The actual value is not o.k.
- The power supply of component N3/10 (ME-SFI [ME] control unit) is OK.
Test sequence

- Switch off ignition.
- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).
- Measure direct voltage with multimeter between sockets [F.11] 107 and [F.23] 119 of the 126-pole socket box tester.
- Switch on ignition.
Specified value

- Voltage[4.75...5.25] V
Question

- Are the measurement values OK?


YES
The measurement values are OK.Further possible causes of fault

- Signal lines
- B37 (Accelerator pedal sensor)
End of test

NO
The measurement values are not OK.Possible cause and remedy

- Cable for voltage supply
End of test

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

Test 1.2.1: Check component M16/6 (Throttle valve actuator) using actual value.

Test 1.2.2: Check component M16/6m1 (Actuator motor) by means of actuation.

1.2.1. Check component M16/6 (Throttle valve actuator) using actual value.
Warning!Communication with ECU required.


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

- Operate engine at idling speed.
Note

- If the throttle valve angle is< 1,1°, unmetered air may be present.
Status of relevant actual value:
- Throttle valve angle:Warning! Communication with ECU required.
Move on to actuation with button F2

1.3. Perform mechanical inspection of component M16/6 (Throttle valve actuator).
Test sequence

- Switch off ignition.
- Expose component M16/6 (Throttle valve actuator).
- Slowly operate throttle flap by hand up to full load.
Specified value

- The throttle valve must not stick and must close by internal spring force.
Question

- Is the test o.k?


YES
The test is o.k..End of test

NO
The test is not o.k..Possible cause and remedy

- Check intake tract for residue and clean if necessary.If no residue is present, replace component M16/6 (Throttle valve actuator).