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Motronic self-diagnosis
Fault codes 00515 - 01251
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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00515
Hall sender -G40
*Short to ground
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- Short to ground in Hall sender -G40 or in wiring connection between -G40 and -J220
- Hall sender defective
- Signal input in control unit defective (-J220 defective)
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- No engine power at full throttle
- Emissions not OK
- High fuel consumption
- Restriction of boost pressure (only engine code letters AEB)
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- Test Hall sender
- Rectify short circuit according to current flow diagram
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*Open circuit or short circuit to positive
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- Open circuit or short circuit to positive in signal wire between -G40 and Motronic control unit
- Distributor position rotated (engine code letters ADP only)
- Hall sender defective
- Signal input in control unit defective (-J220 defective)
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- No engine power at full throttle
- Emissions not OK
- High fuel consumption
- Restriction of boost pressure (only engine code letters AEB)
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- Test Hall sender
=> Page 28-9 (engine code letters AEB only)
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*) One of these fault types appears in addition to the affected component.
Engine code AEB only
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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00528
Altitude sender -F96
* Signal too large
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- Open circuit or short circuit to positive in signal wire between -F96 and Motronic control unit -J220
- Altitude sensor defective
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- The control unit uses a pressure substitute value of around 750 mbar (approx. 2500 m),
- Start-up mixture is too lean at low altitudes, possibly the engine is reluctant to start
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- Test the altitude sender => Page 24-80
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* Signal too small
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- Short to ground in signal wire from -F96 to Motronic control unit -J220
- Break in voltage supply to altitude sender
- Altitude sensor defective
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- Restriction of boost pressure for safety restriction of turbocharger turbine speed
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- Test the altitude sender => Page 24-80
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*) One of these fault types appears in addition to the affected component.
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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00532
Supply voltage
* Signal too large
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- Supply voltage greater than
- 16 V
- Alternator defective
- Excess voltage from assisted start
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- Destruction of Motronic control unit -J220
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- Test voltage
- Read measured value block, -
(Display group 03, Display zone 2)
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* Signal too small
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- Supply voltage less than
- 10 V
- Poor ground connection to Motronic control unit
- Battery discharged
- Current drain with ignition off
- Fuse -S32 defective
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- Engine will not run
- (voltage below approx. 6 V)
- Idling speed outside specified range
- Adaptation for throttle valve control part cannot be performed
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- Test battery charge
status
- Test voltage supply of
Motronic control unit
=>Page01-72 (Display group 03, Display zone 2)
- Test fuse -S32
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*) One of these fault types appears in addition to the affected component.
Notes on fault code 00532:
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◆ If the fault is shown as a sporadic fault, ignore the fault message on the display.
The fault "Signal too small" may be stored if the engine is run for a long time at idle speed with a lot of electrical consumers switched on, causing the battery to become very discharged.
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◆ The fault message "Signal too low" is stored if the supply voltage falls below 10 V for more than 2 second. (The control unit will not function at less than 6.5 V.)
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V.A.G 1551 printout
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Possible causes of fault
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Possible effects
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Fault remedy
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00543
Maximum engine speed exceeded
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- Engine over revving (e.g. wrong gear engaged)
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- possible engine damage
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- eliminate mechanical damage
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Note on fault code 00543:
This fault is set if the following engine speed is exceeded:
- Engine code ADP: 6800 rpm
- Engine codes ADR and AEB: 7100 rpm
Engine code AEB only:
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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00544
Maximum boost pressure exceeded
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- Mechanical boost pressure control valve sticking in closed position
- Boost pressure control solenoid valve -N75 not closing (breather on intake side constantly open)
- Short to ground in wiring between -N75 and Motronic control unit -J220 (valve constantly fully actuated)
- Control line (high-pressure line) from turbocharger to boost pressure control solenoid valve -N75 leaking, disconnected or blocked
- Loss of pressure after the turbocharger
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- Restriction of boost pressure (boost pressure control goes to fixed value duty cycle of 5%)
- Overrun fuel shut-off until boost pressure drops to uncritical value
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- Test boost pressure control => Page 24-53
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- Test intake lines between turbocharger and engine for leaks
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Note on fault code 00544:
The boost pressure is not measured using a sensor, and instead is calculated from the volume of air throughput, depending on intake air temperature, altitude and engine speed.
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V.A.G 1551 printout
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Possible causes of fault
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Possible effects
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Fault remedy
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00561
Mixture adaptation
*Adaptation limit (add) exceeded
*Adaptation limit (mul) exceeded
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- Fuel system pressure too low
- Incorrect signal from air mass meter
- Leaks in the exhaust system upstream of the oxygen sensor
- Unmetered air downstream of air mass meter
- Coked injectors
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- Jolting may occur
- Increased fuel consumption
- Possibly poor idling, jolting
- Restriction of boost pressure (only AEB engine)
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- Refuel the vehicle,
Check the system pressure
- Check the air mass meter
- Eliminate leaks
- Check injection quantity => Page 24-22
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*Adaptation limit (add) not reached
*Adaptation limit (mul) not reached
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- Fuel system pressure too low
- Incorrect signal from air mass meter
- Fuel in oil due to short journey driving style
- Injectors leaking
- AEB engine only
- Leaks in intake system downstream of turbocharger (air measured by air mass meter escaping)
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- Jolting may occur
- Increased fuel consumption
- Possibly poor idling, jolting
- Formation of black smoke
- Soot deposits on spark plugs
- Restriction of boost pressure (AEB engine only)
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- Check system pressure
- Test air mass meter
- Road test, approx. 15 min. or oil change
- Check injectors
=> Page 01-83
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*) One of these fault types appears in addition to the affected component.
Notes on fault code 00561:
add = additive - The effective of the fault (e.g. unmetered air) decreases as the engine speed increases.
mul = multiplicative - The effective of the fault (e.g. injector fault) increases as the engine speed increases.
Engine code AEB only:
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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00575
Intake manifold pressure
* Control limit not reached
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- Signal from air mass meter too small (contact problem, contact resistance)
- Unmetered air between air mass meter and turbocharger
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- Increased power
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- Check air mass meter
=> Page 24-74
- Check air intake hoses/pipework
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- Mechanical boost pressure control valve sticking in open position
- Solenoid valve for boost pressure control; open circuit, plug disconnected, valve stuck in closed position or breather blocked
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- Loss of power
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- Test boost pressure control => Page 24-53
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* Control limit exceeded
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- Signal from air mass meter much too large
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- Loss of power
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- Check air mass meter
=> Page 24-74
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- Mechanical boost pressure control valve sticking in closed or partially closed position or sluggish
- Boost pressure control solenoid valve not closing (breather to intake side permanently open or partially open or leaking)
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- Increased power
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- Test boost pressure control => Page 24-53
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*) One of these fault types appears in addition.
Notes on fault code 00575:
If the control limit is not reached then this means that the required air throughput is not achieved.
The system tries to achieve the air throughput by increasing the boost pressure.
Engine code AEB only:
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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00635
Lambda probe heater upstream of catalytic converter
*Short to ground
* Short to positive
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- Short circuit to ground in control wire from lambda probe heater -Z19 to Motronic control unit -J220
- Short circuit to positive in control wire from lambda probe heater -Z19 to Motronic control unit -J220
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- Emissions not OK
- Lambda control switches to open loop control (probe voltage constant, does not fluctuate)
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- Test lambda probe heater => Page 01-81
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* Output open
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- Open circuit in control wire from lambda probe heater -Z19 to Motronic control unit -J220
- Open circuit in voltage supply for lambda probe heater -Z19
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*) One of these fault types appears in addition to the affected component.
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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00670
Throttle valve positioner sender -G127
* Signal too small
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- Signal wire from sender to Motronic control unit - short to ground
- Wire to voltage supply of sender - short to ground
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- Idling speed positioner deactivated - engine idles with a mechanically regulated air flow through the emergency running slot (slightly increased idling speed)
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- Perform basic setting of throttle valve control part => Page 24-58
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Signal too high
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- Signal wire from sender to Motronic control unit - open circuit or short to positive
- Sender defective
- Open circuit in voltage supply of sender
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- Load change jolt on accelerator release
- Air conditioner compressor does not cut in until about 2000 rpm
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* Implausible signal
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- Positioner mechanism sticking
- Throttle valve sticking
- Fault in the wiring for the servo motor
- Basic setting of throttle valve control part not performed
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*) One of these fault types appears in addition to the affected component.
Notes on fault code 00670:
The sender for the throttle valve positioner is located in the J338 throttle valve -control part.
The sender is a potentiometer which sends information about the position of the throttle valve positioner to the control part.
Vehicles with automatic gearbox only
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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01119
Gear detection signal
* Open circuit / short to positive
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- The signal for the engaged gear is detected during start-up.
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- Brief and slightly more pronounced engine speed fluctuations when engaging or disengaging a gear
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- Interrogate fault memory for gearbox
- Test wiring connection to gearbox control unit according to current flow diagram
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*Short to ground
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- The Motronic control unit detects that no gear is engaged (selector lever in P or N), but the signal for retardation of the ignition angle is still detected (gearbox intervention)
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*) One of these fault types appears in addition to the affected component.
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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01247
Activated charcoal filter solenoid valve
*Short to ground
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- Short to ground between activated charcoal filter solenoid valve -N80 and Motronic control unit -J220
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- Possibility of jolting in part throttle range
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- Check solenoid valve for activated charcoal filter
- Check fuse -S29
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*Short to positive
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- Short to positive between activated charcoal filter solenoid valve -N80 and Motronic control unit -J220
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- Car may smell of petrol
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* Output open
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- Open circuit between activated charcoal filter solenoid valve -N80 and Motronic control unit -J220
- Fuse -S29 defective
- Open circuit in voltage supply to solenoid valve -S29
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*) One of these fault types appears in addition to the affected component.
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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01249
Injector, cylinder 1 -N30
*Short to ground
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- Short to ground in control wire from injector to Motronic control unit -J220
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- Engine idles roughly or cuts out
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- Test fuse -S34
- Check injectors
=> Page 24-28
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*Short to positive
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- Short to positive in control wire from injector to Motronic control unit -J220
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* Output open
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- Open circuit in control wire from injector to Motronic control unit -J220
- Fuse -S34 defective
- Open circuit between injector and fuse -S34 (voltage supply)
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*) One of these fault types appears in addition to the affected component.
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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01250
Injector, cylinder 2 -N31
*Short to ground
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- Short to ground in control wire from injector to Motronic control unit -J220
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- Engine idles roughly or cuts out
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- Test fuse -S34
- Check injectors
=> Page 24-28
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*Short to positive
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- Short to positive in control wire from injector to Motronic control unit -J220
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* Output open
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- Open circuit in control wire from injector to Motronic control unit -J220
- Fuse -S34 defective
- Open circuit between injector and fuse -S34 (voltage supply)
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*) One of these fault types appears in addition to the affected component.
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V.A.G 1551 printout
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Possible causes of fault
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Possible
effects
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Fault remedy
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01251
Injector, cylinder 3 -N32
*Short to ground
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- Short to ground in control wire from injector to Motronic control unit -J220
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- Engine idles roughly or cuts out
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- Test fuse -S34
- Check injectors
=> Page 24-28
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*Short to positive
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- Short to positive in control wire from injector to Motronic control unit -J220
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* Output open
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- Open circuit in control wire from injector to Motronic control unit -J220
- Fuse -S34 defective
- Open circuit between injector and fuse -S34 (voltage supply)
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*) One of these fault types appears in addition to the affected component.
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