SEAT Workshop Service and Repair Manuals

Analysis measurement value block, display groups 0...9 -basic functions-

Display group 1 -basic functions-
l  Engine idling
Read measurement value block 1			→	← The display reads
xxxx rpm	xx.x °C	xx.x %	xxxxxxxx
1	2	3	4	← Display fields	Target value	Analysis
				Conditions for basic settings	1x111111	→ Anchor
			Pre-catalyst lambda regulator		-10.0...10.0 %
		Coolant temperature			80.0...110.0 °C	→ Anchor
	Engine revs (idling revs)				810...890 rpm	→ Anchor

Analysis display group 1, display field 1 - engine revs (idling revs)

The display reads	Possible cause of the fault	Elimination of the fault
Below target value	t  Throttle valve drive unit, jammed or faulty	–  Test the throttle valve drive unit → Chapter.
		–  Test the idling → Chapter.
Above target value	t  Throttle valve drive unit, jammed or faulty	–  Consult the fault memory → Chapter.
		–  Test the throttle valve drive unit → Chapter.
		–  Test the idling → Chapter.

Meaning of the 8-digit numerical block, display field 4 - settings conditions

Meaning if digit = 1
1	2	3	4	5	6	7	8	Meaning
							1	Coolant temperature above 80.0 °C
						1		Revs below 2000 rpm
					1			Throttle valve closed
				1				Lambda regulation, OK
			1					Idling recognised
		1						Air conditioning compressor off
	x							Without meaning
1								No faults found by self-diagnosis

Display group 2 -basic functions-
l  Engine idling
Read measurement value block 2			→	← The display reads
xxxx rpm	xxx.x %	x.x ms	xxx mbar
1	2	3	4	← Display fields	Target value	Analysis
				Intake manifold pressure	250...500 mbar	→ Anchor
			Injection timing		2.0...7.0 ms	→ Anchor
		Engine load			15.0...30.0 %	→ Anchor
	Engine revs (idling revs)				810...890 rpm	→ Anchor

Analysis display group 2, display field 3 - injection timing

The display reads	Possible cause of the fault	Elimination of the fault
Below 2.0 ms	t  Large quantity of fuel from the activated charcoal filter system	–  Test the filter ventilation valve → Chapter.
Above 7.0 ms	t  High engine load due to electrical consumers, air conditioner or power steering to limit	–  Eliminate the excess load (air conditioner, power steering, etc.).

Analysis display group 2, display field 4 - intake manifold pressure

The display reads	Possible cause of the fault	Elimination of the fault
Below 250 mbar	t  Important quantity of infiltrated air between the intake manifold and the air mass meter	–  Test the intake system for leakage → Chapter. –  Test intake manifold pressure sender → Chapter.
Above 500 mbar	t  High engine load due to electrical consumers, air conditioner or power steering to limit	–  Eliminate the excess load (air conditioner, power steering, etc.). –  Test intake manifold pressure sender → Chapter.

Display group 3 -basic functions-
l  Engine idling
Read measurement value block 3			→	← The display reads
xxxx rpm	xxx mbar	xxx.x %	xx.x° before TDC
1	2	3	4	← Display fields	Target value	Analysis
				Ignition angle	-5.0...10.0° before TDC	---
			Throttle valve angle (potentiometer 1 -G187-)		0.2...5.0 %	→ Anchor
		Intake manifold pressure			250...500 mbar	→ Anchor
	Engine revs (idling revs)				810...890 rpm	→ Anchor

Note on display field 3:

t	With the accelerator floored, the display should show an approximate value of 100.0 %.

Display group 4 -basic functions-
l  Engine idling
Read measurement value block 4			→	← The display reads
xxxx rpm	xx.xxx V	xxx.x °C	xxx.x °C
1	2	3	4	← Display fields	Target value	Analysis
				Intake air temperature	-30.0...120.0 °C	→ Anchor
			Coolant temperature		80.0...110.0 °C	→ Anchor
		Engine control unit voltage supply			12.000...15.000 V	→ Anchor
	Engine revs (idling revs)				810...890 rpm	→ Anchor

Note on display field 3:

t

When a fault related to the coolant temperature sender (-G62-) is stored, the engine control unit uses the intake air temperature as a supplementary value for startup (supplementary startup temperature value). Then it raises the temperature in function of a mathematical model programmed into the engine control unit. For an engine at running temperature, after a certain time, a fixed supplementary value will be displayed. This fixed supplementary value, on the other hand, depends on the intake air temperature.

Analysis display group 4, display field 2 - engine control unit voltage supply

The display reads	Possible cause of the fault	Elimination of the fault
Below 12.000 V	t  Alternator faulty, battery charge very low	–  Test the alternator and battery voltage, recharge the battery: → Electrical system; Rep. Gr.27.
	t  Battery subject to intense load after startup due to high current load and supplementary mechanical groups	–  Raise revs a bit for a few minutes and switch off supplementary consumers.
	t  Contact resistance in voltage supply, or in the engine control unit earth connection.	–  Test the control unit voltage supply → Chapter.
	t  Current consumption when the ignition is off	–  Suppress the current consumption.
Above 15.000 V	t  Alternator voltage regulator faulty	–  Test the voltage regulator, if necessary replace: → Electrical system; Rep. Gr.27.
	t  Excess voltage due to jump start or rapid charger	–  Consult the fault memory → Chapter.

Analysis display group 4, display field 3 - coolant temperature

The display reads	Possible cause of the fault	Elimination of the fault
Below 80.0 °C	t  Engine very cold	–  If necessary, do a road test
	t  Coolant temperature sender or engine control unit wiring	–  Test the coolant temperature sender → Chapter.
Above 110.0 °C	t  Radiator dirty	–  Clean the radiator.
	t  Radiator fan does not work	–  Test the radiator fan: → Rep. Gr.19.
	t  Thermostat faulty	–  Test the thermostat: → Rep. Gr.19.
	t  Coolant temperature sender or engine control unit wiring	–  Test the coolant temperature sender → Chapter.
Constant -40.0 °C	t  Open circuit or short circuit to positive	–  Test the coolant temperature sender → Chapter.
Constant 129.0 °C	t  Short circuit to earth

Analysis display group 4, display field 4 - intake air temperature

The display reads	Possible cause of the fault	Elimination of the fault
Constant -40.0 °C	t  Open circuit or short circuit to positive	–  Test the intake air temperature sender → Chapter.
Constant 129.0 °C	t  Short circuit to earth

Display group 5 -basic functions-
l  Engine idling
Read measurement value block 5			→	← The display reads
xxxx rpm	xxx.x %	xxx km/h	text
1	2	3	4	← Display fields	Target value	Analysis
				Engine load state: idling, half load, enriching, deceleration, full load	idling	---
			Driving speed		0 km/h	---
		Engine load			15.0...30.0 %	→ Anchor
	Engine revs (idling revs)				810...890 rpm	→ Anchor

Display group 6 -basic functions-
l  Engine idling
Read measurement value block 6			→	← The display reads
xxxx rpm	xxx.x %	xxx.x °C	xx.x %
1	2	3	4	← Display fields	Target value	Analysis
				Correction factor in function of the altitude	-50.0...20.0 %	---
			Intake air temperature		-30.0...120.0 °C	→ Anchor
		Engine load			15.0...30.0 %	→ Anchor
	Engine revs (idling revs)				810...890 rpm	→ Anchor

Note on display field 3: t  The whole temperature range is displayed as target value. The value displayed should be higher than ambient temperature.