|
Interrogating and erasing fault memory
Fault codes 00282 - 16507
|
V.A.G 1551 print-out
|
Possible causes of fault
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Possible effects
|
Fault remedy
|
|
00282
Throttle valve positioner
-V60
|
|
|
|
|
|
Short circuit
to positive
|
- Short to positive in wiring for throttle valve positioner -V60
|
- Increased idling speed
- Load change jolt when easing off accelerator
|
- Read measured value block, Display Group 023
|
|
|
|
- -V60 defective
|
- Idling speed positioner switched off - engine
- idles with mechanically
- regulated air flow through the emergency running slot (slightly higher idling speed)
|
- Test throttle valve control part -J338 => Page 24-88
|
|
|
|
- Output for -V60 in engine control unit defective
- (control unit defective)
|
|
- Renew engine control unit
|
|
|
|---|
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V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00282
Throttle valve positioner
-V60
|
|
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|
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Short circuit to earth
|
- Short to earth in wiring for throttle valve positioner
- -V60
|
- Increased idling speed
- Load change jolt when easing off accelerator
|
- Read measured value block, Display Group 023
=> Page 01-145
|
|
|
|
- -V60 defective
|
- Idling speed positioner switched off - engine
- idles with mechanically
- regulated air flow through the emergency running slot (slightly higher idling speed)
|
- Test throttle valve control part -J338 => Page 24-88
|
|
|
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- Faulty output for -V60 in engine control unit (control unit defective)
|
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- Renew engine control unit
|
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V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00532
|
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|
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Supply voltage
|
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Signal too great
|
- Supply voltage greater than 16 V
|
- Damage to engine control unit
|
- Check voltage
|
|
|
|
- Excess voltage from
- assisted start
- Defective alternator
|
|
- Read measured value block, Display Group 003, display zone 2
=> Page 01-115
|
|
|
Signal too small
|
- Supply voltage less than 10 V
- Defective fuse
|
- Idling speed not within tolerances
|
- Check voltage supply to engine control unit
=> Page 28-24
Check fuse
|
|
|
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- Poor earth connection to engine control unit
|
|
- Read measured value block, Display Group 003, display zone 2
=> Page 01-115
|
|
|
|
- Battery discharged
- Current drain when ignition is off
|
|
- Check battery charge level
|
Notes on fault code 00532:
-
◆ If the fault is shown as a sporadic fault, ignore the fault message on the display. This fault is often stored when the engine is left idling for a long period with a number of electrical consumers switched on and causing heavy discharging of the battery.
-
◆ The fault message "Signal too low" is stored if the supply voltage falls below 10.00 V for more than 1 second. (The control unit will not function at less than 6.5 V.)
-
◆ The unit does not check for low signals when the engine is being started since the voltage may fall below 10.00 V during starting.
|
|
|---|
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V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00543
|
|
|
|
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Maximum revs
exceeded
|
- Speed was above 7100 rpm (e.g. missed gear)
|
- Possible damage to valves and pistons (contact)
|
- Check engine for damage and erase fault memory
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00561
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Mixture adaptation
|
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Adaption limit (add) exceeded
|
- Fuel system pressure too low
|
- Car may run jerkily
|
- Fill car up with petrol and check fuel system
pressure => Page 24-31
|
|
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Adaption limit (mul) exceeded
|
- Incorrect signal from air mass meter
|
- Increased fuel consumption
|
- Test air mass meter
=> Page 24-51
|
|
|
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- Leaks in exhaust system before catalytic converter
|
|
- Repair leaks
|
|
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- Unmetered air downstream of air mass meter
|
- Rough idling
|
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- Carbon on injectors
|
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- Check injection quantity
=> Page 24-41
|
Notes:
-
◆ (add) = additive, i.e. fault only occurs during idling
-
◆ (mul) = multiplicative, i.e. fault occurs over the entire engine speed range and at all throttle openings.
-
◆ If the fault "00561" and the fault "01088"are stored in fault memory, there must be a fault present which leads to incorrect fuel/air mixtures for both cylinder banks.
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00561
|
|
|
|
|
Mixture adaptation
|
|
|
|
|
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Adaption limit (add) not reached
|
- Fuel system pressure too high
|
- Car may run jerkily
|
- Fill up with petrol and check fuel system
pressure => Page 24-31
|
|
|
Adaption limit (mul) not reached
|
- Incorrect signal from air mass meter
|
- Increased fuel
- consumption
|
- Test air mass meter
=> Page 24-51
|
|
|
|
- Fuel in engine oil (possibly due to short journeys)
|
- Rough idling
|
- Take car for 15-minute run on motorway or change oil
|
|
|
|
- Injectors leaking
|
- Black smoke, soot on spark plugs
|
- Check injection quantity
=> Page 24-41
|
Notes:
-
◆ (add) = additive, i.e. fault only occurs during idling
-
◆ (mul) = multiplicative, i.e. fault occurs over the entire engine speed range and at all throttle openings.
-
◆ If the fault "00561" and the fault "01088"are stored in fault memory, there must be a fault present which leads to incorrect fuel/air mixtures for both cylinder banks.
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00670
|
|
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|
|
Throttle valve positioner sender -G127
|
|
|
|
|
|
Signal too small
|
- Short to earth in signal wire between throttle valve positioner sender
- -G127 and engine control unit
|
- Idling speed positioner switched off - engine
- idles with mechanically
- regulated air flow through the emergency running slot (slightly higher idling speed)
|
- Perform adaption of throttle valve control part => Page 24-101
|
|
|
|
- Fault in power supply to throttle valve positioner
|
- Load change jolt when easing off accelerator
|
|
|
|
|
- Defective throttle valve positioner
|
- AC compressor not
- activated at low engine speeds
|
|
|
|
|
- Faulty signal input in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00670
|
|
|
|
|
Throttle valve positioner sender -G127
|
|
|
|
|
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Signal too great
|
- Open circuit or short to positive in signal wire
- between throttle valve positioner sender -G127 and engine control unit
|
- Idling speed positioner switched off - engine
- idles with mechanically regulated air flow through the emergency running slot (slightly higher idling speed)
|
- Perform adaption of throttle valve control part => Page 24-101
|
|
|
|
- Defective earth connection to throttle valve positioner
|
- Load change jolt when easing off accelerator
|
|
|
|
|
- Defective throttle valve positioner
|
- AC compressor not
- activated at low engine speeds
|
|
|
|
|
Continued ▼
|
|
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|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00670
|
(Fault code 00670
continued)
|
|
|
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Throttle valve positioner sender -G127
|
|
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|
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Signal too great
|
|
|
|
|
|
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- Faulty signal input in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
Notes on fault code 00670:
-
◆ The throttle valve positioner sender is located in the throttle valve control part -J338.
-
◆ The sender is a potentiometer which signals the position of the throttle valve positioner to the control unit.
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01088
Mixture adaption 2
|
|
|
|
|
|
Adaption limit (add) exceeded
|
- Fuel system pressure too low
|
- Car may run jerkily
|
- Fill car up with petrol and check fuel system
pressure => Page 24-31
|
|
|
Adaption limit (mul) exceeded
|
- Incorrect signal from air mass meter -G70
|
- Increased fuel
- consumption
|
- Test -G70 => Page 24-51
|
|
|
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- Unmetered air
- downstream of -G70
|
- Rough idling
|
- Read measured value block, Display Group 002
=> Page 01-112
|
|
|
|
- Leaks in exhaust system upstream of catalytic
- converter
|
|
- Rectify leaks
|
|
|
|
- Solenoid valve 1 for
- activated charcoal filter
- -N80 sticking
|
|
- Test -N80
=> Page 24-82
|
|
|
|
- Carbon on injectors
|
|
- Check injection quantity
=> Page 24-41
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01088
Mixture adaption 2
|
|
|
|
|
|
Adaption limit (add) not reached
|
- Fuel system pressure too high
|
- Car may run jerkily
|
- Check fuel system
pressure => Page 24-31
|
|
|
Adaption limit (mul) not reached
|
- Incorrect signal from air mass meter -G70
|
- Increased fuel consumption
|
- Test -G70 => Page 24-51
|
|
|
|
- Fuel in engine oil (possibly due to short journeys)
|
- Rough idling
|
- Take car for 15-minute run on motorway or change oil
|
|
|
|
- Injectors leaking
|
- Black exhaust smoke, soot on spark plugs
|
- Check injection quantity
=> Page 24-41
|
Note on fault code 01088:
-
◆ add = additive - The fault (e.g. unmetered air) has less effect as engine speed increases.
-
◆ mul = multiplicative - The fault (e.g. injector fault) has more effect as the engine speed increases.
-
◆ If the fault "00561" and the fault "01088"are stored in fault memory, there must be a fault present which leads to incorrect fuel/air mixtures for both cylinder banks.
|
|
|---|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01119
|
|
|
|
|
Gear recognition signal
|
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|
Open/short circuit to positive
|
- Open circuit or short circuit in signal wire between
- engine control unit and multi-function switch -F125
|
- Engine running problems (jerky gearshifts, load change jolts)
|
- Check wiring using current flow diagram
=> Current Flow Diagrams, Electrical Fault-Finding & Fitting Locations
|
|
|
|
- Fault in earth connection to -F125
|
|
- Test multi-function switch
|
|
|
|
- Faulty signal input in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01119
|
|
|
|
|
Gear recognition signal
|
|
|
|
|
|
Short circuit to earth
|
- Short circuit to earth in
- signal wire between
- engine control unit and multi-function switch -F125
|
- Engine running problems (jerky gearshifts, load change jolts)
|
- Check wiring using current flow diagram
=> Current Flow Diagrams, Electrical Fault-Finding & Fitting Locations
|
|
|
|
- Fault in earth connection to -F125
|
|
- Test multi-function switch
|
|
|
|
- Faulty signal input in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01120
|
|
|
|
|
Camshaft timing
control 1
|
|
|
|
|
01121
Camshaft timing
control 2
|
|
|
|
|
|
Mechanical fault
|
- Fault in power supply to camshaft adjustment valve -N205 or -N208
|
|
- Test camshaft adjustment valve -N205
=> Page 28-40
|
|
|
|
- Open circuit / short to earth or positive in wiring between camshaft
- adjustment valve (-N205 or -N208) and engine control unit
|
- Lack of power
|
- Read measured value block, Display Group 025, 026 or 027 => Page 01-149
Renew mechanical
camshaft adjuster
|
|
|
|
Continued ▼
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01120
|
(Fault code 01120
continued)
|
|
|
|
Camshaft timing
control 1
|
|
|
|
|
01121
Camshaft timing
control 2
|
|
|
|
|
|
Mechanical fault
|
|
|
|
|
|
|
- Camshaft adjustment valve -N205 or -N208 defective
- Mechanical camshaft
- adjuster defective
|
|
|
Note on fault codes 01120 and 01121:
The faults will not be stored until 10 minutes after starting and a coolant temperature of above 60 °C.
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01165
|
|
|
|
|
Throttle valve control part -J338
|
|
|
|
|
|
Regulating limit not reached
|
- Throttle valve jamming
- Positioner mechanism
- jamming
|
- Increased idling speed
|
- Read measured value block, Display Group 023
=> Page 01-145
|
|
|
Regulating limit
exceeded
|
- Fault (open circuit / short to positive or earth) in
- wiring to throttle valve positioner -V60
|
- Load change jolt when easing off accelerator
|
- Test throttle valve control part -J338
=> Page 24-88
|
|
|
Regulating difference
|
- Throttle valve positioner sender -G127 defective
- -V60 defective
|
|
|
|
|
|
- Faulty signal output in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
Note:
If fault code 01165 is stored in the fault memory, fault code 17953 will also be stored next time the engine is started.
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01247
|
|
|
|
|
Activated charcoal filter solenoid valve 1 -N80
|
|
|
|
|
|
Short circuit to earth
|
- Short to earth between activated charcoal filter solenoid valve -N80 and engine control unit
- -N80 defective
|
- Car may run jerkily at part throttle
|
- Test -N80 => Page 24-84
|
|
|
Short circuit
to positive
|
- Short to positive between -N80 and engine control unit
- -N80 defective
|
- Car may smell of petrol
|
- Read measured value block, Display Group 010
=> Page 01-132
|
|
|
Output open
|
- Open circuit in wiring
- between -N80 and fuse
- Open circuit in wiring
- between -N80 and engine control unit
|
|
- Rectify open or short
circuit (see Current Flow Diagram)
=> Current Flow Diagrams, Electrical Fault-Finding & Fitting Locations
|
|
|
|
- Fuse defective
- -N80 defective
|
|
- Test fuse
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01249
|
|
|
|
|
No.1 cyl. injector -N30
|
|
|
|
|
|
Short circuit to earth
|
- Short to earth in wiring
- between injector and
- engine control unit
- Injector defective
|
- Engine runs unevenly or cuts out
|
- Test injectors
=> Page 24-36
|
|
|
Short circuit to
positive
|
- Short to positive in wiring between injector and
- engine control unit
- Injector defective
|
|
|
|
|
Output open
|
- Open circuit in wiring
- between injector and
- engine control unit
- Fuse defective
- Open circuit in wiring
- between injector and fuse
- Injector defective
|
|
- Rectify short circuit or open circuit
=> Current Flow Diagrams, Electrical Fault-Finding & Fitting Locations
Check fuse
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01250
|
|
|
|
|
No. 2 cyl. injector -N31
|
|
|
|
|
|
Short circuit to earth
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
|
|
Short circuit to
positive
|
|
|
|
|
|
Output open
|
|
|
|
|
01251
|
|
|
|
|
No. 3 cyl. injector -N32
|
|
|
|
|
|
Short circuit to earth
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
|
|
Short circuit to
positive
|
|
|
|
|
|
Output open
|
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01252
|
|
|
|
|
No. 4 cyl. injector -N33
|
|
|
|
|
|
Short circuit to earth
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
|
|
Short circuit to
positive
|
|
|
|
|
|
Output open
|
|
|
|
|
01253
|
|
|
|
|
No. 5 cyl. injector -N83
|
|
|
|
|
|
Short circuit to earth
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
|
|
Short circuit to
positive
|
|
|
|
|
|
Output open
|
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01254
|
|
|
|
|
No. 6 cyl. injector -N84
|
|
|
|
|
|
Short circuit to earth
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
=> Cylinder 1, fault code 01249
|
|
|
Short circuit to
positive
|
|
|
|
|
|
Output open
|
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01259
|
|
|
|
|
Fuel pump relay -J17
|
|
|
|
|
|
Open/short circuit to earth
|
- Open circuit or short to earth between fuel pump relay -J17 and engine
- control unit
- Fault in power supply to
- -J17
- Fuel pump relay -J17
- defective
|
- Open circuit:
- engine will not run
- Short to earth: engine will continue to run normally but will use more current when ignition is on
- because relay picks up constantly and fuel pump runs continuously, even when engine is not running
|
- Rectify open circuit or short circuit
=> Current Flow Diagrams, Electrical Fault-Finding & Fitting Locations
Test fuel pump relay -J17 => Page 24-46
|
|
|
Short circuit to
positive
|
- Short to positive in wiring between fuel pump relay -J17 and engine control unit
|
|
|
Note:
If fault code 01259 has been stored, fault codes 01247, 01249, 01250, 01251, 01252, 1253, 1254, 17923 or 17935 could also be stored, since the components to which they relate receive their power from the fuel pump relay.
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
16486
|
|
|
|
|
Air mass meter -G70
|
|
|
|
|
|
Signal too small
|
- Unmetered air between air mass meter -G70 and
- engine
- Fault in power supply to
- -G70
|
- Emergency running mode (substitute value based on throttle valve angle and
- engine speed), so no
- noticeable effect on
- performance
|
- Locate and rectify leak
|
|
|
|
- Open circuit or short to earth in signal wiring
- between -G70 and engine control unit
|
|
- Rectify short circuit or open circuit
=> Current Flow Diagrams, Electrical Fault-Finding & Fitting Locations
|
|
|
|
- -G70 defective
|
|
- Test -G70
|
|
|
|
- Faulty signal input in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
16487
|
|
|
|
|
Air mass meter -G70
|
|
|
|
|
|
Signal too great
|
- Short to positive in signal wire between air mass meter -G70 and engine control unit
|
- Emergency running mode (substitute value based on throttle valve angle and
- engine speed), so no
- noticeable effect on
- performance
|
|
|
|
|
- Defective earth connection to -G70
|
|
|
|
|
|
- -G70 defective
|
|
- Test -G70 => Page 24-51
|
|
|
|
- Faulty signal input in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
|
|
|---|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
16496
|
|
|
|
|
Intake air temperature sender -G42
|
|
|
|
|
|
Signal too small
|
- Short to earth in wiring
- between intake air
- temperature sender -G42 and engine control unit
|
- Emergency running mode (display shows constant substitute value of 25.5 ° C)
|
- Read measured value block, Display Group 003
=> Page 01-115
|
|
|
|
- -G42 defective
|
|
- Test -G42 => Page 28-11
|
|
|
|
- Faulty signal input in
- engine control unit
- (control unit defective)
|
|
- Fit a new engine control unit
|
Note on fault code 16496:
-
◆ The fault "Signal too small" will be stored at idling approx. 3 minutes after starting.
-
◆ The fault could also be that the intake air temperature sender connector and twin path intake manifold change-over valve connector have been interchanged. The connector for the sender is black, the connector for the valve is blue.
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
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16497
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Intake air temperature sender -G42
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Signal too great
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- Open circuit or short to positive in wiring between intake air temperature sender -G42 and engine control unit
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- Emergency running mode (display shows constant substitute value of 25.5 ° C)
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- Read measured value block, Display Group 003
=> Page 01-115
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- -G42 defective
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- Test -G42 => Page 28-11
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- Defective earth connection to -G42
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- Faulty signal input in
- engine control unit
- (control unit defective)
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- Fit a new engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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16500
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Coolant temperature sender -G62
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Implausible signal
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- Coolant temperature sender -G62 delivering an implausible signal because of a loose contact or
- moisture corrosion on
- connector plug
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- Difficulty with cold
- starting, especially at very low temperatures
- Poor performance in warm-up phase
- Increased fuel
- consumption
- Increased emissions
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- Read measured value block, Display Group 003
=> Page 28-21
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- Faulty signal input in
- engine control unit
- (control unit defective)
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- Fit a new engine control unit
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Note on fault code 16500:
The temperature curve between 20°C and 60°C is compared with a model temperature curve stored in the control unit. The model curve rises less sharply than the actual curve. If there is a fault which causes the actual temperature to rise too slowly, the real valueswill coincide with those in the model curve at a certain point. The engine control unitrecognisesthe fault as implausible.
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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16501
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Coolant temperature sender -G62
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Signal too small
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- Short to earth in wiring
- between coolant
- temperature sender -G62 and engine control unit
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- Cold start problems at very low temperatures
- Poor performance in warm-up phase
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- Read measured value block, Display Group 003
=> Page 01-115
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- -G62 defective
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- Increased fuel consumption
- Increased emissions
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- Test -G62
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- Faulty signal input in
- engine control unit
- (control unit defective)
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- Fit a new engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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16502
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Coolant temperature sender -G62
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Signal too great
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- Open circuit or short to positive in wiring between coolant temperature sender -G62 and engine control unit
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- Difficulty with cold
- starting, especially at
- very low temperatures
- Poor performance in warm-up phase
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- Read measured value block, Display Group 003
=> Page 01-115
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- -G62 defective
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- Increased fuel
- consumption
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- Test -G62
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- Defective earth connection to -G62
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- Increased emissions
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- Faulty signal input in
- engine control unit
- (control unit defective)
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- Fit a new engine control unit
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Note on fault codes 16500, 16501 and 16502:
As soon as a fault is stored in the fault memory, the engine control unit uses the intake air temperature as a substitute value for starting the engine (starting temperature substitute value) and calculates the engine temperature according to a predetermined model (an increase of 5.25 °C every 65 seconds). After a certain period a fixed substitute value will be adopted when the engine has reached operating temperature. This fixed substitute value is also dependent on the intake air temperature.
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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16505
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Throttle valve
potentiometer -G69
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Implausible signal
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- Moisture or corrosion in connector on throttle valve potentiometer -G69
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- Jerky acceleration
- Load change jolt when easing off accelerator
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- Test throttle valve
potentiometer -G69
=> Page 01-108
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- -G69 defective
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- Uneven idling speed
- control
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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16506
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Throttle valve
potentiometer -G69
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Signal too small
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- Short to earth in signal
- wire between -G69 and
- engine control unit
- Fault in power supply to
- -G69
- -G69 defective
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- Jerky acceleration
- Load change jolt when easing off accelerator
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- Test throttle valve
potentiometer -G69
=> Page 01-108
Rectify short circuit or open circuit
=> Current Flow Diagrams, Electrical Fault-Finding & Fitting Locations
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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16507
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Throttle valve
potentiometer -G69
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Signal too great
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- Open circuit or short to positive in signal wire
- between -G69 and engine control unit
- Defective earth connection to -G69
- -G69 defective
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- Jerky acceleration
- Load change jolt when easing off accelerator
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- Test throttle valve
potentiometer -G69
=> Page 01-108
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Note on fault code 16505:
The air flow rate (air mass) is compared with the throttle valve angle at each different engine speed.
Notes on fault codes 16505, 16506 and 16507:
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◆ If one of the above faults is detected, the control unit adopts a substitute value derived from the engine speed.
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◆ If a fault develops with both the throttle valve potentiometer and the air mass meter at the same time, the emergency running function cannot operate and therefore the engine will cut out.
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