P1233

Throttle Valve Jamminig (Iced Up)

Check Component M16/6 (Throttle Valve Actuator).

Test 1 Test Component M16/6m1 (Actuator Motor) by Actuation.
Test 2 Test Internal Resistance of Component M16/6m1 (Actuator Motor).
Test 3 Check Component M16/6 (Throttle Valve Actuator) Using Actual Value.
Test 4 Test Internal Resistance of Component M16/6 (Throttle Valve Actuator).
Test 5 Test Voltage Supply of the Potentiometers of Component M16/6 (Throttle Valve Actuator).


1 Test Component M16/6m1 (Actuator Motor) by Actuation.

Note: Component M4/3 (engine/AC electric suction fan) runs with an on/off ratio of 50 % during the actuations for safety reasons.

Note! Communication with ECU required.


2 Test Internal Resistance of Component M16/6m1 (Actuator Motor).

Test Requirement
- Acutation is not okay

Test sequence
- Switch off ignition.
- Unplug the socket 1 at component N3/10 (ME-SFI control module).
- (N3/10) F.1 <--> F.2 (N3/10)

Specified value
- Resistor[1...10] ohms

Question
- Is the measured value okay?
Yes
The measured value is o.k. ** End of Test **
No
The measured value is not o.k.
Possible cause and remedy
- Wiring between N3/10 (ME-SFI control module) and M16/6m1 (Actuator motor)
- M16/6m1 (Actuator motor)

** End of Test **


3 Check Component M16/6 (Throttle Valve Actuator) Using Actual Value.

Test requirement
- Ignition ON

Status of the relevant actual values:
- M16/6 (throttle valve actuator) Voltage 1: Note! Communication with ECU required
- M16/6 (throttle valve actuator) Voltage 2: Note! Communication with ECU required

Specified values
- M16/6 (throttle valve actuator) Voltage 1 (Idle speed): [4.0...4.6] V
- M16/6 (throttle valve actuator) Voltage 2 (Idle speed): [0.3...0.90] V
- M16/6 (throttle valve actuator) Voltage 1 (Full load): [ca. 3.5] V
- M16/6 (throttle valve actuator) Voltage 2 (Full load): [ca. 1.5] V

Question
- Are the actual values o.k.?
Yes
The actual values are okay. ** End of Test **
No
At least one of the relevant actual values is not okay.
Possible cause and remedy
- Test internal resistance of component M16/6 (throttle valve actuator).
- Test voltage supply of component M16/6 (throttle valve actuator).

** End of Test **


4 Test Internal Resistance of Component M16/6 (Throttle Valve Actuator).





Test requirements
- The throttle flap of component M16/6 (throttle valve actuator) should operate freely and must not stick or rub.
- At least one of the relevant actual values is not okay.

Test sequence
- Switch off ignition.
- Remove component B2/5 (Hot film MAF sensor).
- Unplug the socket E at component N3/10 (ME-SFI control module).

M16/6r3 (Actual value potentiometer (sliding contact 1))
- (N3/10) E.21 <--> E.33 (N3/10)
- Slowly operate throttle flap by hand up to full load.

Specified values
- Idle speed[ca. 650] ohms
- Full load[ca. 1490] ohms

M16/6r4 (Actual value potentiometer (sliding contact 2))
- (N3/10) E.34 <--> E.33 (N3/10)
- Slowly operate throttle flap by hand up to full load.

Specified values
- Idle speed[ca. 1380] ohms
- Full load[ca. 480] ohms

Question
- Are the measured values okay?
Yes
The measured values are o.k.
Further possible causes of fault
- Test voltage supply of the potentiometers of component M16/6 (throttle valve actuator).
No
The measured values are not o.k.
Possible cause and remedy
- Leads to component M16/6 (throttle valve actuator)
- M16/6 (throttle valve actuator)

** End of Test **


5 Test Voltage Supply of the Potentiometers of Component M16/6 (Throttle Valve Actuator).

Test requirement
- At least one of the relevant actual values is not okay.

Test sequence
- Switch off ignition.
- Unplug the socket E at component N3/10 (ME-SFI control module).
- Connect adapter cable no. 210 589 05 63 at component N3/10 (ME-SFI control module).
- (N3/10) E.22 <--> E.33 (N3/10)
- Switch on ignition.

Specified value
- Voltage[4.75...5.25] V

Question
- Is the measured value okay?
Yes
The measured value is o.k. ** End of Test **
No
The measured value is not o.k.
Possible cause and remedy
- N3/10 (ME-SFI control module)

** End of Test **