tdispecial.ppt 118KB Jun 23 2011 07:20:54 AM
VAG-COM
TDI Fest 2002
TDI-Specific Procedures
Summary
•
•
•
•
•
•
•
Introduction
Basic operations
Checking the air system
Setting the injection timing
Special adaptations
Performance Measurement
More Information
Introduction: what is
VAG-COM?
• Emulates the dealers’ VAG-1551 and VAG1552 tool
• Uses Windows-based PC (100 MHz
recommended)
• Used by enthusiasts, general repair ships,
transmission shops, locksmiths, dealerships
• Uses VAG protocol (separate from OBD-II)
Basic Operations
• Read/Clear/Print Fault Codes (DTC’s)
• Diagnose MIL (Check Engine Light - CEL)
• Monitor/Log/Print Measuring Blocks for
various running parameters
• Recode convenience items (power locks,
radio, etc.)
Note
• The following advanced operations are
intended for an A4 TDI (ALH engine).
Expect some variations if you have an
A3/B4 car (A3 Jetta, Passat)
Air system part I: MAF
• Go into Engine measuring block 003
• Start Logging data
• In a high gear (4th/5th), give full throttle from
1500-2000 rpm up to 3500-4000rpm.
• Find and Open the Log file in Windows
Explorer
• Graph MAF specified/actual/rpm -vs- time in
Excel
Checking the MAF - continued
• The MAF is OK if the actual value is more
than 850-900 mg/h at 3000 rpm.
Air system part II: Turbo
• Go to Engine Measuring Block 011
• Start Logging the data
• In a high gear (4th/5th) give full throttle from
1500-2000 rpm to 3500-4000 rpm
• Find and Open the Log file in Windows
Explorer
• In Excel graph actual/requested boost/rpm vs
time
Turbo - continued
• On a stock vehicle, one should see a spike at
2.1 bar quickly regulated at 1.9 through the
whole rpm range
Setting the injection timing
•
•
•
•
Engine has to be warm (coolant above 85ºC)
Go to Engine Measuring Block 000
Switch to Basic Settings
Take note of the values in fields 2 (timing)
and 9 (fuel temp)
• Report in the following graph (also in the
Bentley manual)
90
85
80
Ret. timing
75
Med.timing
70
Adv. timing
65
Inj advance (2)
60
55
50
45
40
35
30
25
20
15
10
50
60
70
80
90
100
110
120
130
140
Fuel temp (9)
150
160
170
180
190
200
210
Setting timing-continued
• Specification is between the blue and red lines
• To slightly advance timing, you need to be in the
upper portion of the graph. Setting is done
mechanically, slightly rotating the pump sprocket
once its three screws have been loosened.
• It is strongly discouraged to set your timing
outside of the specification!
• Graph is available at
http://pics.tdiclub.com/members/ericmaurier/timing.xls
Special adaptations: Login code
• To perform the following adaptations (except
idle) you need to use the Login function.
Enter 12233 as a Login code.
• Misuse of some of the adaptations can lead to
engine failure. This is done at your own risk!
• Note that the EGR setting is for off-road use
only...
Channel 1: injected quantity
• Check the injected quantity at idle, engine
warm and all power consuming devices
turned off. Specification is 2.5 to 9 mg/h.
• To change the amount of injected fuel
perceived by the ECU, go to adaptation
channel 1.
• If you have driveability problems, you may
want to increase it to 3-4 mg/h.
• For slightly improved throttle response, you
may try to decrease the value.
Channel 2: idle speed
• No login required
• To increase idle speed, increase the value
and vice-versa
Channel 3: EGR
• To decrease the EGR rate, increase the
number to the highest possible value
(typically 33768)
• This will prevent/slow down the intake
manifold clogging problem and reduce
smoke
• Though the MAF at idle is still within
specifications (370 mg/h) do not use this
adaptation on the road :-)
Channel 4: start of injection
• This channel commands the start of injection
over the whole operating range of the engine,
including at full load. Advanced timing there
may lead to severe damage to the engine
because of the increased combustion pressure.
• It is in no way a substitution for the
mechanical pump setting seen previously
• In a nutshell: don’t mess with it!
Channel 5: starting conditions
• Though undocumented, this channel effects
the injected quantity the ECU allows when
cranking
• You may want to experiment with it as a
temporary fix for bad-start problems
Performance Measurement
• “Butt Dyno”
More Info
•
Mk IV Lock/Unlock Horn/Flash:
•
[Select]
[46 - Cent. Conv.] (35 - Cent. Locking for manual window cars)
[Adaptation - 10]
Channel (03..08)
Adaptation Value (1 = on, 0 = off)
[Save]
Channel 03 Auto Lock
Channel 04 Auto Unlock
Channel 05 Unlock, horn sounds
Channel 06 Lock, horn sounds
Channel 07 Unlock, turn signals flash
Channel 08 Lock, turn signals flash
• Visit our website:
WWW.ROSS-TECH.COM
TDI Fest 2002
TDI-Specific Procedures
Summary
•
•
•
•
•
•
•
Introduction
Basic operations
Checking the air system
Setting the injection timing
Special adaptations
Performance Measurement
More Information
Introduction: what is
VAG-COM?
• Emulates the dealers’ VAG-1551 and VAG1552 tool
• Uses Windows-based PC (100 MHz
recommended)
• Used by enthusiasts, general repair ships,
transmission shops, locksmiths, dealerships
• Uses VAG protocol (separate from OBD-II)
Basic Operations
• Read/Clear/Print Fault Codes (DTC’s)
• Diagnose MIL (Check Engine Light - CEL)
• Monitor/Log/Print Measuring Blocks for
various running parameters
• Recode convenience items (power locks,
radio, etc.)
Note
• The following advanced operations are
intended for an A4 TDI (ALH engine).
Expect some variations if you have an
A3/B4 car (A3 Jetta, Passat)
Air system part I: MAF
• Go into Engine measuring block 003
• Start Logging data
• In a high gear (4th/5th), give full throttle from
1500-2000 rpm up to 3500-4000rpm.
• Find and Open the Log file in Windows
Explorer
• Graph MAF specified/actual/rpm -vs- time in
Excel
Checking the MAF - continued
• The MAF is OK if the actual value is more
than 850-900 mg/h at 3000 rpm.
Air system part II: Turbo
• Go to Engine Measuring Block 011
• Start Logging the data
• In a high gear (4th/5th) give full throttle from
1500-2000 rpm to 3500-4000 rpm
• Find and Open the Log file in Windows
Explorer
• In Excel graph actual/requested boost/rpm vs
time
Turbo - continued
• On a stock vehicle, one should see a spike at
2.1 bar quickly regulated at 1.9 through the
whole rpm range
Setting the injection timing
•
•
•
•
Engine has to be warm (coolant above 85ºC)
Go to Engine Measuring Block 000
Switch to Basic Settings
Take note of the values in fields 2 (timing)
and 9 (fuel temp)
• Report in the following graph (also in the
Bentley manual)
90
85
80
Ret. timing
75
Med.timing
70
Adv. timing
65
Inj advance (2)
60
55
50
45
40
35
30
25
20
15
10
50
60
70
80
90
100
110
120
130
140
Fuel temp (9)
150
160
170
180
190
200
210
Setting timing-continued
• Specification is between the blue and red lines
• To slightly advance timing, you need to be in the
upper portion of the graph. Setting is done
mechanically, slightly rotating the pump sprocket
once its three screws have been loosened.
• It is strongly discouraged to set your timing
outside of the specification!
• Graph is available at
http://pics.tdiclub.com/members/ericmaurier/timing.xls
Special adaptations: Login code
• To perform the following adaptations (except
idle) you need to use the Login function.
Enter 12233 as a Login code.
• Misuse of some of the adaptations can lead to
engine failure. This is done at your own risk!
• Note that the EGR setting is for off-road use
only...
Channel 1: injected quantity
• Check the injected quantity at idle, engine
warm and all power consuming devices
turned off. Specification is 2.5 to 9 mg/h.
• To change the amount of injected fuel
perceived by the ECU, go to adaptation
channel 1.
• If you have driveability problems, you may
want to increase it to 3-4 mg/h.
• For slightly improved throttle response, you
may try to decrease the value.
Channel 2: idle speed
• No login required
• To increase idle speed, increase the value
and vice-versa
Channel 3: EGR
• To decrease the EGR rate, increase the
number to the highest possible value
(typically 33768)
• This will prevent/slow down the intake
manifold clogging problem and reduce
smoke
• Though the MAF at idle is still within
specifications (370 mg/h) do not use this
adaptation on the road :-)
Channel 4: start of injection
• This channel commands the start of injection
over the whole operating range of the engine,
including at full load. Advanced timing there
may lead to severe damage to the engine
because of the increased combustion pressure.
• It is in no way a substitution for the
mechanical pump setting seen previously
• In a nutshell: don’t mess with it!
Channel 5: starting conditions
• Though undocumented, this channel effects
the injected quantity the ECU allows when
cranking
• You may want to experiment with it as a
temporary fix for bad-start problems
Performance Measurement
• “Butt Dyno”
More Info
•
Mk IV Lock/Unlock Horn/Flash:
•
[Select]
[46 - Cent. Conv.] (35 - Cent. Locking for manual window cars)
[Adaptation - 10]
Channel (03..08)
Adaptation Value (1 = on, 0 = off)
[Save]
Channel 03 Auto Lock
Channel 04 Auto Unlock
Channel 05 Unlock, horn sounds
Channel 06 Lock, horn sounds
Channel 07 Unlock, turn signals flash
Channel 08 Lock, turn signals flash
• Visit our website:
WWW.ROSS-TECH.COM