Volkswagen Workshop Service and Repair Manuals > Passat (B3) > Power unit | Motronic fuel injection and ignition system ? 07.95 | Self diagnosis, V.A.G Inspection Service | Self-diagnosis

Erasing fault memory > < Interrogating fault memory

Motronic fuel injection and ignition system ä 07.95

Self-diagnosis

Fault table

Notes:

◆ The fault table is listed according to the 5 digit fault code on the left.
◆ Before renewing components indicated as being faulty, check the wiring and connectors to these components as well as the earth connections using current flow diagram. This is particularly relevant if faults are output as "occurring sporadically" (SP).


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
No fault recognised!		If no fault has been detected: Fault not recognised by self-diagnosis.		Continue fault finding using fault table: =>Engine fault finding binder.
00281
Road speed sender -G68
	Implausible signal	- No signal from speedometer (G21) or road speed sender (G68)	- Speedometer not indicating correctly	- Check signal from G21/G68 , checking speed signal
			- Governed speed reduced to 5000 rpm.
			- Increased idling speed
			- Engine running problems


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00513
Engine speed sender -G28
	Implausible signal	- Gap speed sender/sender wheel too large	- Engine will not start	- Check G28 for tight fit/metal particles , item 28
		- Metal particles on G28 or retaining base loose		- Check sender wheel for tight fit:
		- Sender wheel loose		=> Repair group 13; Dismantling and assembling cylinder block, crankshaft and flywheel
		- Wiring open circuit or short circuit		- Check G28 => Page 24-60
		- Loose contact
		- G28 defective		- Replace G28 => Page 24-11 , item 28


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00515
Hall sender -G40
	Open circuit/short to positive	- G40 defective	- High fuel consumption	- Check G40 => Page 28-14
	Short to earth	- Wiring open circuit	- Reduced output	- Check distributor position => Page 28-7 , removing and installing distributor
		- Wire has short to positive	- Poor starting
		- Loose contact
		- Wire has short to earth


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00518
Throttle valve potentiometer -G69
	Short to earth	- Wiring open circuit	- Hard load change	- Check G69 , checking throttle valve potentiometer
		- Wire has short to earth
		- G69 defective
	Open circuit/short to positive	- Wiring open circuit in earth wire
		- Wire has short to positive
		- G69 defective
	implausible signal	- Loose contact
		- G69 defective


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00522
Coolant temperature sender -G62
	Short to earth	- Wire has short to earth	- Poor cold starting	- Check G62
		- G62 defective	- Poor hot starting
	Open circuit/short to positive	- Wiring open circuit	- Coolant temperature on V.A.G 1551 remains constant at approx. 80 °C
		- Wire has short to positive
		- G62 defective
	implausible signal	- G62 defective


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00524
Knock sensor 1 -G61
	Open circuit/short to earth	- Wiring open circuit or short to earth	- Reduced performance	- Check G61 => Page 28-16
		- G61 defective	- Increased fuel consumption	- Replace G61 => Page 28-3 , item 10
		- No knock recognition from Motronic control unit (J220)		- If necessary replace J220, => Page 24-9 , item 16


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00525
Lambda probe -G39
	no signal	- Wiring open circuit	- No Lambda control	- Check Lambda probe and Lambda control
		- Lambda probe heating defective		- Check Lambda probe heating
		- G39 defective	- Fuel smell
	Short to earth	- Wiring open circuit or short to earth
		- G39 defective
	Short to positive	- Wiring open circuit or short to positive
		- G39 defective
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00527
Intake air temperature sender -G72
	Short to earth	- Wire has short to earth	- Poor hot starting	- Check G72
		- G72 defective
	Open circuit/short to positive	- Wiring open circuit or short to positive	- Intake manifold temperature on V.A.G 1551 remains constant at approx. 20 °C
		- G72 defective
00532
Supply voltage
	Signal too large	- Battery voltage - exceeds 16.0 V	- Engine will not start	- Check alternator: => Current flow diagrams, Electrical fault finding and Fitting locations binder
	Signal too small	- Battery voltage - less than 10.0 V	- Engine running problems	- Check battery


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00533
Idling control
	Adaption limit exceeded	- Idling stabilization valve (N71) sticking or is soiled	- Rough idling	- Check N71
	Adaption limit not reached	- Unmetered air between air mass meter (G70) and engine		- Check intake air system for leaks (unmetered air)


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00537
Lambda control
	Control limit exceeded	- Short to earth	- No Lambda control (control at limit)	- Check Lambda probe and Lambda control
	Control limit not reached	- G39 defective	- Engine running problems
		- Intake air system leaking		- Check intake air system for leaks (unmetered air)
		- Exhaust system leaking between cylinder head and catalyst		- Check exhaust system: => Repair group 26; Removing and installing parts of exhaust system
		- Activated charcoal filter solenoid valve 1 (N80) sticking (always open)		- Check N80 => Page 01-35 , final control diagnosis
		- Fuel pressure not OK		- Check fuel pressure regulator => Page 24-74
		- Injectors defective		- Check injectors => Page 24-70


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00543
Maximum rpm exceeded
	Signal too large	- The governed speed of the engine has been reached (wrong gear selected, engine speed exceeded 6800 rpm)	- Governed speed reduced to 5000 rpm	- Erase fault memory
		- Signal from engine speed sender (G28) impaired		- Check G28
00545
Engine/gearbox electrical connection
	Short to earth	- Fault in automatic gearbox	- Hard gear changes	- Check wiring to gearbox:
		- Wiring open circuit or short to earth		=> Current flow diagrams, Electrical fault finding and Fitting locations binder
	Short to positive	- Wiring open circuit or short to positive		- Interrogate automatic gearbox fault memory:
				=> Automatic gearbox 096; Self-diagnosis, interrogating fault memory


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00549
Consumption signal
	Short to positive	- Wire 51 from Motronic control unit (J220) to dash panel insert has open circuit or short to positive	- Multi-function indicator display is incorrect	- Locate and eliminate short using current flow diagram: => Current flow diagrams, Electrical fault finding and Fitting locations binder
00553
Air mass meter -G70
	Open circuit/short to positive	- Wiring open circuit or short to positive	- Engine running problems	- Check G70
		- G70 defective
	Short to earth	- Short to earth
		- G70 defective


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00561
Mixture adaption
	Adaption limit not reached	- Lambda control defective	- Engine running problems	- Check Lambda probe and Lambda control
	Adaption limit exceeded	- Fuel pressure not OK	- No Lambda control	- Check fuel pressure regulator => Page 24-74
		- Misfiring	- Lambda control learnt values at limit	- Check ignition system components => Page 28-1
		- Intake air system leaking		- Check intake air system for leaks (unmetered air)
		- Exhaust system leaking between cylinder head and catalyst		- Check exhaust system: => Repair group 26; Removing and installing parts of exhaust system
		- Activated charcoal filter solenoid valve 1 (N80) sticking (always open)		- Check N80 => Page 01-35 , final control diagnosis
		- Injectors defective		- Check injectors => Page 24-70
		- Idling stabilization valve (N71) sticking or is soiled		- Check N71
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00585
Exhaust gas recirculation system temperature sensor -G98
	Short to earth	- Wire to temperature sensor has connection to vehicle earth	- Rough idling	- Check G98: => Repair group 26; Exhaust gas recirculation system
00586
Exhaust gas recirculation system regulation
	Implausible signal	- Exhaust gas recirculation valve (N18) defective (always open)	- Rough idling	- Check N18: => Repair group 26; Exhaust gas recirculation system
				- Check exhaust gas recirculation system: => Repair group 26; Exhaust gas recirculation system
00609
Ignition output 1
	Short to positive	- Ignition transformer (N152) or ignition transformer output stage (N157) defective	- Engine will not start	- Check N152 => Page 28-18
				- Check N157 => Page 28-19


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00638
Engine/gearbox electrical connection
	Short to earth	- Wiring open circuit or short to earth	- Hard gear changes	- Check wiring to automatic gearbox:
		- Fault in automatic gearbox or throttle valve potentiometer for automatic gearbox		=> Current flow diagrams, Electrical fault finding and Fitting locations binder
	Short to positive			- Interrogate automatic gearbox fault memory:
		- Wiring open circuit or short to positive		=> Automatic gearbox 096; Self-diagnosis, interrogating fault memory


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00640
Lambda probe heating relay -J278
	Short to positive	- Wire has short to positive	- No Lambda control	- Check J278 => Page 01-35 , final control diagnosis
	Open circuit/short to earth	- Wiring open circuit/short to earth		- Check Lambda probe heating => Page 24-35
00758
Secondary air system
	Short to positive	- Wire has short to positive	- None	- Check V101 => Page 01-35 , final control diagnosis
		- Secondary air pump motor (V101) defective		- Check secondary air system: => Repair group 26; Secondary air system


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
01025
Fault lamp activation defective
	Short to positive	- Wire has short to positive	- None	- Check wiring to fault lamp using current flow diagram:
	Open circuit/short to earth	- Fault lamp defective		=> Current flow diagrams, Electrical fault finding and Fitting locations binder
		- Wiring open circuit/short to earth		- If necessary replace fault lamp
01235
Secondary air inlet valve -N112
	Short to positive	- Wire has short to positive	- None	- Check N112 => Page 01-35 , final control diagnosis
		- N112 defective		- Check secondary air system: => Repair group 26; Secondary air system
	Open circuit/short to earth	- Wiring open circuit/short to earth
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
01242
End stage in control unit
	No fault type recognised	- Loose contact to the final control elements or Motronic control unit defective	- Engine will not start	- Perform final control diagnosis => Page 01-35
				- Check wiring to the final controls using current flow diagram, if necessary replace control unit => Page 24-9 , item16
01247
Activated charcoal filter solenoid valve 1 -N80
	Short to earth	- Wiring has short to earth	- Rough idling	- Check N80 => Page 01-35 , Final control diagnosis
		- N80 defective	- Fuel smell
	Open circuit/short to positive	- Wiring open circuit/short to positive
		- N80 defective
V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
01249
No.1 cyl. injector -N30
	Open circuit/short to earth	- Wiring open circuit or short to earth	- Poor starting	- Check N30...N33 => Page 24-70 , checking injectors
		- N30 defective	- Poor performance
	Short to positive	- Short to positive	- Engine will not start
		- N30 defective
01250
No. 2 cyl. injector -N31
	Open circuit/short to positive	=> No. 1 Cyl., fault code 01249	=> No. 1 Cyl., fault code 01249	=> No. 1 Cyl., fault code 01249
	Short to earth
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
01251
No. 3 cyl. injector -N32
	Open circuit/short to positive	=> No. 1 Cyl., fault code 01249	=> No. 1 Cyl., fault code 01249	=> No. 1 Cyl., fault code 01249
	Short to earth
01252
No. 4 cyl. injector -N33
	Open circuit/short to positive	=> No. 1 Cyl., fault code 01249	=> No. 1 Cyl., fault code 01249	=> No. 1 Cyl., fault code 01249
	Short to earth
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
01257
Idling stabilization valve -N71
	Short to positive	- Wire has short to positive	- Rough idling	- Check N71 => Page 01-35 , final control diagnosis
		- N71 defective
	Open circuit/short to earth	- Wiring open circuit/short to earth
		- N71 defective
01259
Fuel pump relay -J17
	Short to positive	- Short to positive	- Engine will not start	- Check J17 => Page 01-35 , final control diagnosis


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
01264
Secondary air pump relay -J299
	Short to positive	- Wire has short to positive	- None	- Check J299 => Page 01-35 , final control diagnosis
		- J299 defective		- Check secondary air system: => Repair group 26; Secondary air system
	Open circuit/short to earth	- Wiring open circuit/short to earth
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
01265
Exhaust gas recirculation valve -N18
	Open circuit/short to earth	- Wiring open circuit/short to earth	- Rough idling	- Check N18 => Page 01-35 , final control diagnosis
		- N18 defective
	Short to positive	- Wire has short to positive
		- N18 defective
65535
Control unit defective		- Control unit internally defective	- Engine running problems	- Renew J361 if necessary, => Page 24-9 , item 16
			- Engine will not start

Power unit
Motronic fuel injection and ignition system ? 07.95 / Self diagnosis, V.A.G Inspection Service / Self-diagnosis
Fault table

Erasing fault memory > < Interrogating fault memory

Volkswagen Workshop Service and Repair Manuals

Passat (B3)

Power unit Motronic fuel injection and ignition system ? 07.95 / Self diagnosis, V.A.G Inspection Service / Self-diagnosis Fault table

Power unit Motronic fuel injection and ignition system ? 07.95 / Self diagnosis, V.A.G Inspection Service / Self-diagnosis Fault table

Power unit
Motronic fuel injection and ignition system ? 07.95 / Self diagnosis, V.A.G Inspection Service / Self-diagnosis
Fault table

Power unit
Motronic fuel injection and ignition system ? 07.95 / Self diagnosis, V.A.G Inspection Service / Self-diagnosis
Fault table