Part 1
Self-adaptation of Mixture Formation for Left Bank of Cylinders is at Limit Value (At Part Load) :: Enleanment Below Permissible Limit (P0173)
Check Self-adaptation of Mixture Formation.
Test sequence
- Check actual value Self-adaptation of mixture formation.
- Carry out the following tests.
- Continue with key F2
Preconditions for test
- 001 Temperature of coolant [ 80.0 .. 105.0 ]
- 016 Battery voltage [ 12.0 .. 14.5 ]
- 055 Safety fuel shutoff
- 379 Oil temperature [ 80.0 .. ]
- 381 Oil quality [ 1.0 .. 4.0 ]
- 380 Oil level ( Engine not running ) [ *uf50 .. *uf51 ]
- 380 Oil level ( Engine at idle speed ) [ *uf52 .. *uf53 ]
Self-adaptation
- 181 Self-adaptation enabled
- 576 Selfadaptation in idle speed range, right bank of cylinders [ -1.0 .. 1.0 ]
- 577 Self-adaptation in lower partial-load range, right bank of cylinders [ 0.68 .. 1.32 ]
- 578 Self-adaptation in upper partial-load range, right bank of cylinders [ 0.68 .. 1.32 ]
- 596 Selfadaptation in idle speed range, left bank of cylinders [ -1.0 .. 1.0 ]
- 597 Self-adaptation in lower partial-load range, left bank of cylinders [ 0.68 .. 1.32 ]
- 598 Self-adaptation in upper partial-load range, left bank of cylinders [ 0.68 .. 1.32 ]
Question
- Are one or several actual values not within the stated specified values?
No
The actual values of self-adaptation are within the specified value range. ** End of Test **
Yes
Test 1 Actual Value Greater Than Set Value
Test 2 Actual Value Less Than Set Value
1 Actual Value Greater Than Set Value
Test 1-1 Test Fuel Pressure and Delivery of Component M3 (Fuel Pump).
Test 1-2 Test Gasoline Fuel For Water And Diesel Portions.
Test 1-3 Test Unmetered Air.
1-1 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 1-1-1 Test Fuel Pressure and Internal Leaks of Fuel System.
Test 1-1-2 Test Delivery of Component M3 (Fuel Pump).
Test 1-1-3 Test Current Consumption of Component M3 (Fuel Pump).
1-1-1 Test Fuel Pressure and Internal Leaks of Fuel System.
Question
- Can the vehicle engine be operated at idle speed?
Yes - Skip to 1-1-1-Y
No - Skip to 1-1-1-N
1-1-1-Y
Figure legend
- Connection Pressure hose(See arrow)
- 043Pressure gage(103 589 00 21 00)
- 055Measuring beaker
- 069Pressure 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 1-1-1-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 **
1-1-1-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)
- Fuel filter with integrated pressure regulator
** End of Test **
1-1-1-N
Figure legend
- 001 Sockets of component N3/10 (ME-SFI control module)
- 05 35-pin socket box
- 043 Pressure gage
- 050 126-pin socket box
- 055 Measuring beaker
- 069 Pressure hose(119 589 04 63 00)
- 108 Test cableN3/10 (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).
- Connect socket box (35-pin) to component N3/10 (ME-SFI control module).
- Connect socket box (126-pin) to component N3/10 (ME-SFI control module).
- Insert bridge.:
- (5.7) Pin 7 of 35 <--> Pin 121 of 126 (4.36)
- 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
No further information available.
1-1-1-N-Y
Test requirement
- Test pressure gage is connected.
Test sequence
- Switch off ignition.
- Insert bridge.
- (5.7) Pin 7 of 35 <--> Pin 121 of 126 (4.36)
- 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)
- Fuel filter with integrated pressure regulator
** End of Test **
1-1-2 Test Delivery of Component M3 (Fuel Pump).
Figure legend
- 001 Sockets of component N3/10 (ME-SFI control module)
- 05 35-pin socket box
- 043 Pressure gage
- 050 126-pin socket box
- 055 Measuring beaker
- 069 Pressure hose(119 589 04 63 00)
- 108 Test cableN3/10 (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.
- Separate fuel feed hose at the fuel line and hold in a suitable measuring beaker.
- Connect socket box to component N3/10 (ME-SFI control module).
- Connect socket box (35-pin) to component N3/10 (ME-SFI control module).
- Connect socket box (126-pin) to component N3/10 (ME-SFI control module).
- Insert bridge.:
- (5.7) Pin 7 of 35 <--> Pin 121 of 126 (4.36)
- Switch on ignition.
- Note: Component M3 (fuel pump) runs.
Specified value
- 1 liter of fuel should flow in a maximum of 35 seconds
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
- Inspect fuel lines for restriction points (in particular pinching).
- Fuel filter
- Test current consumption of component M3 (fuel pump).
1-1-3 Test Current Consumption of Component M3 (Fuel Pump).
Figure legend
- 003 Multimeter
- N10/2kA (Fuel pump relay)
- N10/2f4 (Fuel pump fuse)
Test requirement
- Carry out test only if complaint exists.
- Is fuse N10/2f4 (Fuel pump fuse) OK?
Test sequence
- Switch off ignition.
- Connect socket box (35-pin) to component N3/10 (ME-SFI control module).
- Connect socket box (126-pin) to component N3/10 (ME-SFI control module).
- Insert bridge.:
- Jump (5.7) Pin 7 of 35 <--> Pin 121 of 126 (4.36)
- Remove fuse N10/2f4 (Fuse 4) from component N10/2 (Rear signal acquisition and actuation module (SAM)).
- Measure amperage (N10/2f4) <--> (N10/2f4)
- 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
- N10/2kA (Fuel pump relay)
- Inspect cables from component N10/1 (Signal acquisition and actuation module (SAM) driver side) to component N3/10 (ME-SFI control module).
- Inspect cables from component N10/2 (Rear SAM control module with fuse and relay module) to component M3 (fuel pump).
- Test cable from control module N10/1 (Front SAM control module with fuse and relay module) (connector 13, pin 3) to component N10/2 (Rear SAM control module with fuse and relay module) (connector 1, pin 4).
- Test cable from control module N10/1 (Front SAM control module with fuse and relay module) (connector 13, pin 2) to component N10/2 (Rear SAM control module with fuse and relay module) (connector 1, pin 7).
- M3 (fuel pump)
** End of Test **
1-2 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.:
- Jump (5.7) Pin 7 of 35 <--> Pin 121 of 126 (4.36)
- 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 **
1-2-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 **
1-3 Test Unmetered Air.
No further information available.
** End of Test **