Idle Speed Control Implausible
Idle speed control implausible (P0507)
Test 1 Check Component B37 (Accelerator Pedal Sensor).
Test 2 Check Component M16/6 (Throttle Valve Actuator).
1 Check Component B37 (Accelerator Pedal Sensor).
Test 1-1 Check Component B37 (Accelerator Pedal Sensor) Using Actual Value.
Test 1-2 Test Voltage Supply of Component B37 (Accelerator Pedal Sensor).
1-1 Check Component B37 (Accelerator Pedal Sensor) Using Actual Value.
Test sequence
- Switch on ignition.
Status of the relevant actual values:
- B37 (Accelerator pedal sensor) Signal 1: Note! Communication with ECU required
- B37 (Accelerator pedal sensor) Signal 2: Note! Communication with ECU required
Specified values
- B37 (Accelerator pedal sensor)Signal 1(Accelerator pedal position: Idle speed): [0.2...0.5] V
- B37 (Accelerator pedal sensor)Signal 2(Accelerator pedal position: Idle speed): [0.1...0.5] V
- B37 (Accelerator pedal sensor)Signal 1(Accelerator pedal position: Kickdown): [4.3...4.8] V
- B37 (Accelerator pedal sensor)Signal 2(Accelerator pedal position: Kickdown): [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
- Test voltage supply of component B37 (Accelerator pedal sensor).
- Inspect cables from component N3/10 (ME-SFI control module) to component B37 (Accelerator pedal sensor).
- B37 (Accelerator pedal sensor)
** End of Test **
1-2 Test Voltage Supply of Component B37 (Accelerator Pedal Sensor).
Test requirement
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Connect socket box (126-pin) to component N3/10 (ME-SFI control module).
- (4.6) 91 <--> 104 (4.19)
- Switch on ignition.
Specified value
- Voltage[4.75...5.25] V
Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Signal wire
- B37 (Accelerator pedal sensor)
No
The measured value is not o.k.
Possible cause and remedy
- Cable between component N3/10 (ME-SFI control module) and component B37 (Accelerator pedal sensor)
** End of Test **
2 Check Component M16/6 (Throttle Valve Actuator).
Test 2-1 Check Component M16/6 (Throttle Valve Actuator) Using Actual Value.
Test 2-2 Test Component M16/6m1 (Actuator Motor) by Actuation.
Test 2-3 Test Internal Resistance of Component M16/6m1 (Actuator Motor).
Test 2-4 Test Internal Resistance of Component M16/6 (Throttle Valve Actuator).
Test 2-5 Test Voltage Supply of the Potentiometers of Component M16/6 (Throttle Valve Actuator).
2-1 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) Signal 1: Note! Communication with ECU required
- M16/6 (throttle valve actuator) Signal 2: Note! Communication with ECU required
Specified values
- M16/6 (throttle valve actuator)Signal 1(Accelerator not operated): [0.30...0.90] V
- M16/6 (throttle valve actuator)Signal 2(Accelerator not operated): [4.20...4.60] V
- M16/6 (throttle valve actuator)Signal 1(Kickdown switch operated, accelerator fully depressed):[1.30...1.70] V
- M16/6 (throttle valve actuator)Signal 2(Kickdown switch operated, accelerator fully depressed):[3.30...3.70] 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 **
2-2 Test Component M16/6m1 (Actuator Motor) by Actuation.
Test requirement
- The engine is running.
Note
- If the throttle valve angle is < 1,1� DK, there is unmetered air present.
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.
2-3 Test Internal Resistance of Component M16/6m1 (Actuator Motor).
Test sequence
- Switch off ignition.
- Unplug the socket 1 at component N3/10 (ME-SFI control module).
- (N3/10) 1.6 <--> 1.3 (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 **
2-4 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 air scoop at component M16/6 (throttle valve actuator).
- Unplug the socket 3 at component N3/10 (ME-SFI control module).
M16/6r3 (Actual value potentiometer (sliding contact 1))
- (N3/10) 3.21 <--> 3.22 (N3/10)
- Slowly operate throttle flap by hand up to full load.
Specified values
- Idle speed[ca. 1380] ohms
- Full load[ca. 480] ohms
M16/6r4 (Actual value potentiometer (sliding contact 2))
- (N3/10) 3.20 <--> 3.22 (N3/10)
- Slowly operate throttle flap by hand up to full load.
Specified values
- Idle speed[ca. 650] ohms
- Full load[ca. 1490] 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 **
2-5 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 3 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) 3.19 <--> 3.22 (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.
Possible cause and remedy
- Inspect cables from component M16/6 (throttle valve actuator) to component N3/10 (ME-SFI control module).
No
The measured value is not o.k.
Possible cause and remedy
- N3/10 (ME-SFI control module)
** End of Test **