Part 2
Self-adaptation of Mixture Formation for Right Bank of Cylinders is at Limit Value (At Part Load) :: Enrichment Over Permissible Limit (P0170)
2 Actual Value Less Than Set Value
Test 2-1 Inspect Air Cleaner Housing.
Test 2-2 Check Component G3/3 (Left O2 Sensor, Before TWC [KAT]).
Test 2-3 Check Component G3/4 (Right O2 Sensor, Before TWC [KAT]).
Test 2-4 Check Component M16/6 (Throttle Valve Actuator).
Test 2-5 Check Component Y62 (Fuel Injectors).
2-1 Inspect Air Cleaner Housing.
No further information available.
** End of Test **
2-2 Check Component G3/3 (Left O2 Sensor, Before TWC [KAT]).
Test 2-2-1 Check Component G3/3 (Left O2 Sensor, Before TWC [KAT]) Using Actual Value.
Test 2-2-2 Test Current Consumption of Heating of Component G3/3 (Left O2 Sensor, Before TWC [KAT]).
2-2-1 Check Component G3/3 (Left O2 Sensor, Before TWC [KAT]) Using Actual Value.
Test requirement
- Engine at idle speed
- 80 �C If coolant temperature > , run engine at idle speed for about 2minutes.
Status of the relevant actual values:
- G3/3 (Left O2 sensor, before TWC [KAT]), Signal: Note! Communication with ECU required
Specified value
- O2 sensor signal varies within the range from [-200 to +1000] m V by more than 300 m V after 2 min at idle speed.
- O2 sensor heater, before TWC:ON
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 of current consumption of O2 sensor heater of component G3/3 (Left O2 sensor, before TWC [KAT])
- Signal cable of component G3/3 (Left O2 sensor, before TWC [KAT])
- G3/3 (Left O2 sensor, before TWC [KAT])
** End of Test **
2-2-2 Test Current Consumption of Heating of Component G3/3 (Left O2 Sensor, Before TWC [KAT]).
Risk of injury from rotating parts!
- Severe injuries from limbs being jammed or squashed may result from rotating parts and in extreme cases the limbs may be sheared off.
Rules of conduct and protective measures
- Do not insert your hand into rotating parts.
- Wear closed and close-fitting work clothes.
Test requirement
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Detach sockets 5 and 2 at component N3/10 (ME-SFI control module).
- (N3/10) 5.7 <--> 2.24 (N3/10)
- Switch on ignition.
Warning! Perform the measurement only for a short time so that component G3/3 (Left O2 sensor, before TWC [KAT]) does not overheat.
Specified value
- Amperage[0.5...2.0] A
Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Signal cable of component G3/3 (Left O2 sensor, before TWC [KAT])
- G3/3 (Left O2 sensor, before TWC [KAT])
No
The measured value is not o.k.
Possible cause and remedy
- N10/1f43 (Fuse 43)
- N10/1kI (Circuit 87 relay, engine)
- Cable of O2 sensor heater of component G3/3 (Left O2 sensor, before TWC [KAT])
- G3/3 (Left O2 sensor, before TWC [KAT])
** End of Test **
2-3 Check Component G3/4 (Right O2 Sensor, Before TWC [KAT]).
Test 2-3-1 Check Component G3/4 (Right O2 Sensor, Before TWC [KAT]) Using Actual Value.
Test 2-3-2 Test Current Consumption of Heating of Component G3/4 (Right O2 Sensor, Before TWC [KAT]).
2-3-1 Check Component G3/4 (Right O2 Sensor, Before TWC [KAT]) Using Actual Value.
Test requirement
- Engine at idle speed
- 80 �C If coolant temperature > , run engine at idle speed for about 2minutes.
Status of the relevant actual values:
- G3/4 (Right O2 sensor, before TWC [KAT]), Signal: Note! Communication with ECU required
Specified value
- O2 sensor signal varies within the range from [-200 to +1000] m V by more than 300 m V after 2 min at idle speed.
- O2 sensor heater, before TWC:ON
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 of current consumption of O2 sensor heater of component G3/4 (Right O2 sensor, before TWC [KAT])
- Signal cable of component G3/4 (Right O2 sensor, before TWC [KAT])
- G3/4 (Right O2 sensor, before TWC [KAT])
** End of Test **
2-3-2 Test Current Consumption of Heating of Component G3/4 (Right O2 Sensor, Before TWC [KAT]).
Risk of injury from rotating parts!
- Severe injuries from limbs being jammed or squashed may result from rotating parts and in extreme cases the limbs may be sheared off.
Rules of conduct and protective measures
- Do not insert your hand into rotating parts.
- Wear closed and close-fitting work clothes.
Test requirement
- The actual value is not o.k.
Test sequence
- Switch off ignition.
- Detach sockets 5 and 2 at component N3/10 (ME-SFI control module).
- (N3/10) 5.7 <--> 2.15 (N3/10)
- Switch on ignition.
Warning! Perform the measurement only for a short time so that component G3/4 (Right O2 sensor, before TWC [KAT]) does not overheat.
Specified value
- Amperage[0.5...2.0] A
Question
- Is the measured value okay?
Yes
The measured value is o.k.
Further possible causes of fault
- Signal cable of component G3/4 (Right O2 sensor, before TWC [KAT])
- G3/4 (Right O2 sensor, before TWC [KAT])
No
The measured value is not o.k.
Possible cause and remedy
- N10/1f43 (Fuse 43)
- N10/1kI (Circuit 87 relay, engine)
- Cable of O2 sensor heater of component G3/4 (Right O2 sensor, before TWC [KAT])
- G3/4 (Right O2 sensor, before TWC [KAT])
** End of Test **
2-4 Check Component M16/6 (Throttle Valve Actuator).
Test 2-4-1 Check Component M16/6 (Throttle Valve Actuator) Using Actual Value.
Test 2-4-2 Test Component M16/6m1 (Actuator Motor) By Actuation.
Test 2-4-3 Test Internal Resistance of Component M16/6m1 (Actuator Motor).
Test 2-4-4 Test Internal Resistance of Component M16/6 (Throttle Valve Actuator).
Test 2-4-5 Test Voltage Supply of the Potentiometers of Component M16/6 (Throttle Valve Actuator).
2-4-1 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 **
2-4-2 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.
** End of Test **
2-4-3 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]
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 **
2-4-4 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 **
2-4-5 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
- ASwitch off ignition.
- AUnplug the socket 3 at component N3/10 (ME-SFI control module).
- AConnect adapter cable no. 210 589 05 63 at component N3/10 (ME-SFI control module).
- A(N3/10) 3.19 <--> 3.22 (N3/10)
- ASwitch on ignition.
Specified value
- AVoltage[4.75...5.25] V
Question
- AIs 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 **
2-5 Check Component Y62 (Fuel Injectors).
Test 2-5-1 Inspect component Injectors for Leaks.
Test 2-5-2 Inspect Operation and spray Pattern of component Injectors.
2-5-1 Inspect component Injectors for Leaks.
Figure legend
- 055 Measuring beaker
- Y62 (Fuel injectors)
Test sequence
- Switch off ignition.
- Remove fuel rail together with component Y62 (Fuel injectors).
- 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).
- (5.7) Pin 7 of 35 <--> Pin 121 of 126 (4.36)
- Switch on ignition.
Specified value
- Component Y62 (Fuel injectors) must not drip.
Question
- Was the test o.k.?
Yes
The test was okay.
Further possible causes of fault
- Inspect operation and spray pattern of component Y62 (Fuel injectors).
No
The test was not okay.
Possible cause and remedy
- Y62 (Fuel injectors)
** End of Test **
2-5-2 Inspect Operation and spray Pattern of component Injectors.
Figure legend 1
- 001 Sockets of component N3/10 (ME-SFI control module)
- 048 Shop-made tool(Test wiring harness)
- 050 126-pin socket box
- 055 Measuring beaker
- 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
Figure legend 2 (Shop-made tool)
- 1x Clutch 140 545 35 28
- 2x Contact spring 004 545 56 26
- 1x Red banana connector
- 1x Black banana connector
- 2,2 m Red cable with diameter 1,5 mm (Pin 1)
- 2,2 m Brown cable with diameter 1,5 mm (Pin 2)
- 2 m Insulation sheathing with diameter 6 mm
Test sequence
- Switch off ignition.
- Remove fuel rail together with component Y62 (Fuel injectors).
- 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.
- Hold component Y62 (Fuel injectors) in a vessel and briefly operate manually with shop-made test cable set at sockets 5 and 9 of the 35-pin socket box.
Specified value
- Fuel injectors should eject fuel uniformly.
Question
- Was the test o.k.?
Yes
The test was okay. ** End of Test **
No
The test was not okay.
Possible cause and remedy
- Y62 (Fuel injectors)
** End of Test **