SEAT Workshop Service and Repair Manuals > Leon Mk2 > Engine, mixture preparation | Simos injection and ignition system | Self diagnosis, V.A.G Inspection Service | Self diagnosis

Final control diagnosis > < Interrogating and erasing fault memory

Simos injection and ignition system

Self diagnosis

Fault table

Notes:

◆ The fault tables are listed according to the 5 digit fault code on the left.
◆ Explanation of the fault types (e.g. "open circuit/short circuit to earth"):

=> Fault reader operating instructions

◆ If components are indicated as faulty:
First check the wiring and connectors to these components as well as the system earth connections according to 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 recognized!		If a fault is present: Fault not recognized by self-diagnosis		Continue fault finding using fault table in binder "Engine fault finding".


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00282
Throttle valve positioner -V60-1)
	Short circuit	- Wiring open circuit or short to earth/positive	- Cold starting problems	- Check V60 , checking throttle valve control part
		- V60 defective/sticking	- Cold idling problems
	Open circuit	- Wiring open circuit	- Hard load change
		- V60 defective/sticking	- Mechanical emergency running (J338) recognized
	Mechanical fault	- V60 defective/sticking
	Connectors	- Cables interchanged

1) The throttle valve positioner V60 is a component of the throttle valve control part J338.


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00513
Engine speed sender -G28
	Signal outside tolerance	- Gap speed sender/sender wheel too large	- Engine will not start	- Check G28 for tight fit/metal particles , item 22
		- Metal particles on G28 or retainer 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 24-62
		- Loose contact
		- G28 defective		- Replace G28 => Page 24-11, item 22


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00515
Hall sender -G40
	Signal outside tolerance	- G40 defective	- Governed speed approx. 4500 rpm	- Check G40 => Page 28-14
		- Wiring open circuit	- Reduced performance
		- Wire has short to positive	- Poor starting
		- Wire has short to earth	- High fuel consumption
		- Loose contact
		- TDC marking not aligned at distributor		- Check distributor setting => Page 28-7


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00516
Idling switch -F601)
	implausible signal	- F60 defective	- Engine running problems when pulling away	- Check F60 , checking throttle valve control part
	Open circuit	- Wiring open circuit	- Engine running problems during transfer from idling/overrun to part load
	Short to earth	- Short to earth
		- Short to positive

1) The idling switch F60 is a component of the throttle valve control part J338.


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00518
Throttle valve potentiometer -G691)		- G69 defective
	Short to earth	- Wiring open circuit	- Hard load change	- Check G69 , checking throttle valve control part
		- Wire has short to earth	- Fuel odours
	Open circuit/short to positive	- Wiring open circuit in earth wire
		- Wire has short to positive
		- G69 defective
	implausible signal	- Loose contact
		- G69 defective

1) The throttle valve potentiometer G69 is a component of the throttle valve control part J338.


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00520
Air mass/flow meter -G70/G19
	Open circuit/short to positive	- Wiring open circuit or short to positive	- Engine running problems	- Check G70
		- G70 defective	- Fuel odours
	Short to earth	- Short to earth
		- G70 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	- Engine running problems
		- Wire has short to positive	- Fuel odours
		- G62 defective
	implausible signal	- G62 defective


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00523
Intake air temperature sender -G42
	Short to earth	- Wire has short to earth	- Poor hot starting	- Check G42
		- G42 defective
	Open circuit/short to positive	- Wiring open circuit or short to positive
		- G42 defective


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00524
Knock sensor 1 -G61
	no signal	- Wiring open circuit or short to earth	- Reduced performance	- Check G61 => Page 28-16
		- No knock recognition from Simos control unit (J361)	- High fuel consumption
		- G61 defective		- Replace G61 => Page 28-3, item 8
	signal too large	- No knock recognition from Simos control unit (J361)		- If necessary replace J361, => Page 24-9, item 14
		- G61 defective


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
		- G39 defective	- Fuel odours
	Open circuit/short to earth	- Wiring open circuit or short to earth
		- G39 defective
	Short to positive	- Wiring open circuit or short to positive
		- G39 defective
	signal too small	- Lambda probe heating defective		- Check Lambda probe heating => Page 24-33
	implausible signal	- G39 defective


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00530
Throttle valve positioner/potentiometer -G881)
	Open circuit/short to earth	- Wiring open circuit or short to earth	- Cold starting problems	- Check G88 , checking throttle valve control part
		- G88 defective	- Idling problems
	Short to positive	- Wiring open circuit in earth wire	- Hard load change
		- Wire has short to positive	- mech. emergency running (J338) recognized
		- G88 defective	- Rough idling
	implausible signal	- Connector incorrectly wired
	Control difference	- G88 defective
	Control limit exceeded

1) The throttle valve positioner/potentiometer G88 is a component of the throttle valve control part J338.


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00532
Supply voltage
	Signal too large	- Battery voltage - exceeds 23.9 V	- Engine running problems	- Check alternator: => Current flow diagrams, Electrical fault finding and Fitting locations binder
	Signal too small	- Battery voltage - less than 6.3 V - Poor earth connection		- Check battery Check earth connections => Current flow diagrams, Electrical fault finding and Fitting locations binder
00533
Idling control
	Lower limit value	- Throttle valve positioner (V60) sticking - Unmetered air to throttle valve	- Engine running problems - High fuel consumption - Fuel odours	- Check V60
	Upper limit value	- Throttle valve positioner (V60) sticking


V.A.G 1551 print-out		Possible causes of fault	Possible effects	Fault remedy
00537
Lambda control
	Upper limit value	- Exhaust system leaking between cylinder head and catalyst (unmetered air)	- No Lambda control - Engine running problems - High fuel consumption - Fuel odours	- Check Lambda probe and Lambda control
	Lower limit value	- Activated charcoal filter solenoid valve 1 (N80) leaking/sticking		- Check N80 => Page 01-33, Final control diagnosis
00545
Engine/gearbox electrical connection
	Short to earth	- Short to earth	- Hard gear changes	- Check wiring connections to gearbox:
		- Fault in automatic gearbox		=> Current flow diagrams, Electrical fault finding and Fitting locations binder
	Signal outside tolerance	- Short to earth		- Interrogate automatic gearbox memory: => Automatic gearbox 099; Carrying out self-diagnosis; Interrogating fault memory


Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00624
Air conditioner compressor cut-in
	Short to positive	- Wiring open circuit or short to positive	- Hard load changes at small throttle valve angles - Rough idling - Idling speed drops when switching air conditioner on	- Check wiring to air conditioner: => Current flow diagrams, Electrical fault finding and Fitting locations binder
00625
Speed signal
	Signal outside tolerance	- No signal from speedometer (G21) or speedometer sender (G22)	- Speedometer not indicating correctly	- Check signal from G21/G22 , checking speed signal
			- Increased idling speed
			- Engine running problems
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
00635
Lambda probe heating before Catalyst
	Open circuit/short to positive	- Wiring open circuit/short to positive	- Fuel smell	- Check Lambda probe heating
		- G39 defective	- High fuel consumption	- Check wiring for short to positive/earth: => Current flow diagrams, Electrical fault finding and Fitting locations binder
	Short to earth	- Short to earth
		- G39 defective
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
01247
Activated charcoal filter solenoid valve 1 -N80
	Short to earth	- Wiring has short to earth	- Rough idling	- Check N80 => Page 01-33, Final control diagnosis
		- N80 defective
	Open circuit/short to positive	- Wiring open circuit/short to positive	- Fuel odours
		- 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 positive	- Wiring open circuit or short to positive	- Poor starting	- Check N30...N33 => Page 24-77, checking injectors
		- N30 defective	- Engine running problems
	Short to earth	- Short to earth	- Engine stopped
		- 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
01259
Fuel pump relay -J17
	Short to positive	- Short to positive	- Engine will not start	- Check J17 => Page 01-33, final control diagnosis
01265
EGR valve -N18
	Short to earth	- Wiring short to earth	- Rough idling - Poor starting - Poor throttle reaction when driven	- Check N18 => Page 01-33, Final control diagnosis
		- N18 defective
	Open circuit/short to positive	- Wiring open circuit or short to positive	- Exhaust emission values exceeded
		- N18 defective
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
17978
Engine control unit blocked		- Attempted manipulation	- Engine will not start	- Match engine electronic control unit to the electronic immobilizer => Page 24-71
		- Short in the communication wire		- Check electronic immobilizer: => Repair group 96; Servicing electronic immobilizer
		- Incorrect coding
		- Immobilizer control unit defective/missing
Output on V.A.G 1551 printer		Possible causes of fault	Possible effects	Fault remedy
65535
Control unit defective		- Control unit internally defective	- Engine running problems	- Renew J361 if necessary, => Page 24-9, item 14
			- Engine stopped

Engine, mixture preparation
Simos injection and ignition system / Self diagnosis, V.A.G Inspection Service / Self diagnosis
Fault table

Final control diagnosis > < Interrogating and erasing fault memory

SEAT Workshop Service and Repair Manuals

Leon Mk2

Engine, mixture preparation Simos injection and ignition system / Self diagnosis, V.A.G Inspection Service / Self diagnosis Fault table

Engine, mixture preparation Simos injection and ignition system / Self diagnosis, V.A.G Inspection Service / Self diagnosis Fault table

Engine, mixture preparation
Simos injection and ignition system / Self diagnosis, V.A.G Inspection Service / Self diagnosis
Fault table

Engine, mixture preparation
Simos injection and ignition system / Self diagnosis, V.A.G Inspection Service / Self diagnosis
Fault table