[133] Self-adaptation of Mixture Formation : 'Part Load' for Left Bank of Cylinders at Limit Value

[133] Self-adaptation of Mixture Formation : ME-SFI Control Module (N3/10) : 'Part Load' for Left Bank of Cylinders at Limit Value

Check Self-adaptation

Test 1 Check Smooth Engine Running
Test 2 Test Fuel Pressure and Delivery of Component M3 (Fuel Pump).
Test 3 Test Gasoline Fuel For Water And Diesel Portions.

1 Check Smooth Engine Running

Test sequence
- Check actual value Self-adaptation of mixture formation.
- Check intake tract for unmetered air.,Inspect purge system for leaks.
- Check actual value Smooth engine running.
- Carry out compression test with selection menu 'actuations'.
- Test fuel pressure and delivery of component M3 (fuel pump).
- Test gasoline fuel for water and diesel portions.

2 Test Fuel Pressure and Delivery of Component M3 (Fuel Pump).

Warning! Risk of explosion, poisoning and injury!Fuels are highly inflammable and toxic if inhaled. Fuels may cause skin damage. fuel vapors are explosive, invisible and spread out at floor level; they are toxic if inhaled and produce giddiness and an anaesthetizing effect.

Rules of conduct and protective measures
- Wear suitable protective clothing.
- Pay attention to national safety precautions and regulations.
- No fire, sparks, naked flames and smoking.
- Ensure the work place is adequately ventilated.
- Never drain or pour in fuels over assembly pits.
- Store drained fuel in a suitable and sealed vessel.
- Immediately eliminate any fuel which has flowed out.

First-aid measures
- Clean moistened skin with water and soap.
- Change moistened clothing as quickly as possible.
- If fuel gets into your eyes, rinse out your eyes immediately with water and contact a doctor if necessary.

Test 2-1 Test Fuel Pressure and Internal Leaks of Fuel System.
Test 2-2 Test Delivery of Component M3 (Fuel Pump).
Test 2-3 Test Current Consumption of Component M3 (Fuel Pump).

2-1 Test Fuel Pressure and Internal Leaks of Fuel System.

Question
- Can the vehicle engine be operated at idle speed?
Yes - Skip to 2-1-Y
No - Skip to 2-1-N

2-1-Y

Figure legend
- 043 Pressure gage (103 589 00 21 00)
- 055 Measuring beaker
- 069 Pressure hose (119 589 04 63 00)

Test sequence
- Switch off ignition.
- Connect test pressure gauge.
- Engine at idle speed

Specified value
- Pressure [3.7...4.2] bar

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Skip to 2-1-Y-Y
No
The measured value is not o.k.
Possible cause and remedy
- Test current consumption of component M3 (fuel pump).
- Fuel filter with integrated pressure regulator

** End of Test **

2-1-Y-Y

Test requirement
- Test pressure gage is connected.

Test sequence
- Run the engine for a short time and switch off again.
- Ignition: OFF

Specified value
- Pressure after 30 minutes:[> 2.5] bar

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Test delivery of component M3 (fuel pump).
No
The measured value is not o.k.
Possible cause and remedy
- In the event of slow pressure drop:Test Y62 (Fuel injectors).
- In the event of rapid pressure drop:Check valve in component M3 (fuel pump)

** End of Test **

2-1-N

Figure legend
- 001 Sockets of component N3/10 (ME-SFI control module)
- 041 Clock
- 043 Pressure gage
- 050 126-pin socket box
- 055 Measuring beaker
- 069 Pressure hose (119 589 04 63 00)
- 108 Test cable N3/10 (ME-SFI control module)
- N3/10 (ME-SFI control module)
- II 1/63 Connection Test cable
- II 64/126 Connection Test cable

Test sequence
- Switch off ignition.
- Connect test pressure gauge.
- Connect socket box to component N3/10 (ME-SFI control module).
- Insert bridge.:
- (A.3) 3 <--> 21(C.29)
- Switch on ignition.
- Note: Component M3 (fuel pump) runs.

Specified value
- Pressure [3.7...4.2] bar

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Skip to 1-1-1-N-Y
No
The measured value is not o.k.
Possible cause and remedy
- K40/5f52 (Fuse 52)
- K40/5kT (Fuel pump relay)
- Test current consumption of component M3 (fuel pump)
- Fuel filter with integrated pressure regulator

** End of Test **

2-1-N-Y

Test requirement
- Test pressure gage is connected.

Test sequence
- Switch off ignition.
- Insert bridge.
- (A.3) 3 <--> 33 (D.1)
- Switch on ignition.
- Note: Component M3 (fuel pump) runs.
- Switch off ignition.
- Remove bridge.

Specified value
- Pressure after 30 minutes:[> 2.5] bar

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Test delivery of component M3 (fuel pump).
No
The measured value is not o.k.
Possible cause and remedy
- In the event of slow pressure drop:Test Y62 (Fuel injectors).
- In the event of rapid pressure drop:Check valve in component M3 (fuel pump)

** End of Test **

2-2 Test Delivery of Component M3 (Fuel Pump).

Figure legend
- 003 Multimeter

Test requirement
- Carry out test only if complaint exists.

Test sequence
- Switch off ignition.
- Connect socket box to component N3/10 (ME-SFI control module).
- Insert bridge.:
- (A.3) 3 <--> 33 (D.1)

- Unplug component K40/5f52 (Fuse 52) from component K40/5 (Rear fuse and relay module).
- Measurement is performed at the contact slot of component K40/5f52 (fuse 52)
- (K40/5f52) - <--> + (K40/5f52)
- Switch on ignition.
- Note: Component M3 (fuel pump) runs.

Specified value
- Amperage[4...9] A

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- M3 (fuel pump)
No
The measured value is not o.k.
Possible cause and remedy
- K40/5kT (Fuel pump relay)
- Inspect cables from component K40/5 (Rear fuse and relay module) to component M3 (fuel pump).
- M3 (fuel pump)

** End of Test **

3 Test Gasoline Fuel For Water And Diesel Portions.

Warning! Risk of explosion, poisoning and injury! Fuels are highly inflammable and toxic if inhaled. Fuels may cause skin damage. fuel vapors are explosive, invisible and spread out at floor level; they are toxic if inhaled and produce giddiness and an anaesthetizing effect.

Rules of conduct and protective measures
- Wear suitable protective clothing.
- Pay attention to national safety precautions and regulations.
- No fire, sparks, naked flames and smoking.
- Ensure the work place is adequately ventilated.
- Never drain or pour in fuels over assembly pits.
- Store drained fuel in a suitable and sealed vessel.
- Immediately eliminate any fuel which has flowed out.

First-aid measures
- Clean moistened skin with water and soap.
- Change moistened clothing as quickly as possible.
- If fuel gets into your eyes, rinse out your eyes immediately with water and contact a doctor if necessary.

Figure legend
- 043 Pressure gage
- 055 Measuring beaker
- 069 Pressure hose (119 589 04 63 00)

Test sequence
- Switch off ignition.
- Connect test pressure gauge.
- Hold the open fuel line in measuring beaker (055).
- Insert bridge.:
- (A.3) 3 <--> 33 (D.1)
- Switch on ignition.
- Note: Component M3 (fuel pump) runs.
- Drain off about 0.5 l fuel.
- Switch off ignition.

Specified value
- Look - If water is present in the fuel, the fuel is cloudy. After being left for a few hours, the water settles on the bottom of the measuring beaker.
- In cases of doubt, compare the fuel drained with proper fuel.

Question
- Was the test o.k.?
Yes
Skip to 1-2-Y
No
The test was not okay.
Possible cause and remedy
- Water is present in the fuel. Replace the fuel.

** End of Test **

3-Y

Test sequence
- Allow a few drops of the drain fuel to drip onto a sheet of paper.

Specified value
- Look - The fuel should evaporate within a few minutes practically free of stains. If diesel portions are present in the fuel, a clearly visible oil stain remains after the gasoline has evaporated.
- In cases of doubt, compare the fuel drained with proper fuel.

Question
- Was the test o.k.?
Yes
The test was okay. ** End of Test **
No
The test was not okay.
Possible cause and remedy
- Diesel is present in the gasoline fuel. Replace the fuel.

** End of Test **