Skoda Workshop Service and Repair Manuals

Measured value blocks, display groups 070...126 Display group 070 - Exhaust gas reduction, Activated charcoal filter system diagnosis (tank ventilation system): l  Engine idling l  Coolant temperature minimum 80°C l  Diagnostic device in function 04 “basic setting”

Read measured value block 70 →				⇐ Readout on display:
xx %	xx %	xxx mbar	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Result of the activated charcoal filter system diagnosis (Test OFF/ Test runs/ TVV O.K./ TVV N.O.K.)	TVV o.k.	—
			Intake manifold pressure		240…420 mbar	—
		Result of current diagnosis			> 25 %	—
	Opening level			AUA, AUB, BBY, BBZ, BKY	13…25 %
				BUD	12…38 %	—

Note TVV means Tank Vent Valve (activated charcoal filter solenoid valve 1).   Note t  Re display field 1: t  During diagnosis the display fluctuates in the range from 13...25% (or 12...38%) by approx. 6%. Display group 074 - Exhaust gas reduction, Exhaust gas recirculation valve adaptation: Not valid for engines with engine identification characters BUD and BKY as of 05.2005 l  Ignition on, engine stopped l  Diagnostic device in function 04 “basic setting”

Read measured value block 74 →				⇐ Readout on display:
x.x V	x.x V	x.xxx V	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Adaptation status (ADP runs, ADP O.K. or ADP N.O.K)	ADP O.K.	—
			Current pot voltage value		0.300…4.600 V	—
		100 %- Position			2.9…4.6 V	—
	0 - Position (basic setting)				0.3…1.3 V	—

Note t  To display group 074: t  The adaptation of the exhaust gas recirculation valve occurs with the ignition on. t  The engine control unit is adapted to the exhaust gas recirculation valve by selecting display group 074 under function 04 “Basic position”. This adaption must always be performed if another EGR valve (or completely different engine) or another engine control unit has been installed. Display group 075 - Exhaust gas recirculation: Not valid for engines with engine identification characters BUD and BKY as of 05.2005 l  Engine idling l  Diagnostic device in function 04 “basic setting” –  Briefly blip throttle 5 times up to max. speed.

Read measured value block 75 →				⇐ Readout on display:
xxxx rpm	xxx mbar	xxx mbar	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Result: Test runs / Test OFF / Syst. O.K. / Syst. N.O.K.	Syst. O.K.	—
			Intake manifold pressure difference		min. 50 mbar	—
		Intake manifold pressure			240…420 mbar	—
	Engine speed				1800…5600 rpm	—

Note t  Re display field 3: t  An error can already occur under 140 mbar. Display group 100 - readiness code: l  Engine idling

Read measured value block 100 →				⇐ Readout on display:
xxxxxxxx	xxx.x °C	xxx s	xxxxxxxx
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Diagnosis status	—	—
			Time since engine start		—	—
		Coolant temperature			80.0...110.0 °C	→ Chapter
	Readiness code				00000000	→ Anchor

Display field 1 - Readiness code - Meaning of the digits in the 8-digit numerical block

The readiness code is only generated if all the display positions show 0
1	2	3	4	5	6	7	8	Diagnosis function
							0	Catalytic converter
						0		Catalytic converter heating (no diagnosis at present/always “0”)
					0			Activated charcoal filter system (tank ventilation system)
				0				Secondary air injection system (not fitted/always “0”)
			0					Air conditioning system (currently no diagnosis/always “0”)
		0						Lambda probe
	0							Lambda probes-heating
0								Exhaust gas recirculation

Display group 120 - traction control system (TCS): l  Driving

Read measured value block 120 →				⇐ Readout on display:
xxxx rpm	xxx Nm	xxx Nm	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Status	TCS active / TCS n. active	—
			Actual engine load		—	—
		Nominal engine load			—	—
	Engine speed				xxxx rpm → Note	→ Chapter

1)  Display group 001, display field 1 → Chapter Display group 122 - Gearbox (only automatic): l  Driving

Read measured value block 122 →				⇐ Readout on display:
xxxx rpm	xxx Nm	xxx Nm	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Status	Engine ctl./ no ctl.	—
			Actual engine load		—	—
		Nominal engine load			—	—
	Engine speed				xxxx rpm → Note	→ Chapter

2)  Display group 001, display field 1 → Chapter Display group 125 - communication, databus messages For engines with engine identification characters AUA, AUB, BBY, BBZ, BKY l  Engine idling

Read measured value block 125 →				⇐ Readout on display:
Text	Text	Text	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Status airbag	Airbag 1	—
			Status of combiinstrument		Combi 1	—
		Status gearbox			Gearbox 1	—
	Status ABS				ABS 1	—

Display group 125 - communication, databus messages For engines with engine identification characters BUD l  Engine idling

Read measured value block 125 →				⇐ Readout on display:
Text	Text	Text	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Status of the air-conditioning system	Clima 1	—
			Status of combiinstrument		Combi 1	—
		Status ABS			ABS 1	—
	---				---	—

Display group 126 - communication, databus messages For engines with engine identification characters AUA, AUB, BBY, BBZ, BKY l  Engine idling

Read measured value block 126 →				⇐ Readout on display:
Text	Text	Text	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				---	---	—
			---		---	—
		Status of the onboard supply control unit			El. CU 1
	Status of the air-conditioning system				Clima 1

Display group 126 - communication, databus messages For engines with engine identification characters BUD l  Engine idling

Read measured value block 126 →				⇐ Readout on display:
Text	Text	Text	Text
1	2	3	4	⇐ Display field	Specified value	Analysis:
				Status of the onboard supply control unit	El. CU 1	—
			Status airbag		Airbag 1	—
		---			---
	---				---

Note t  Regarding display group 126 and 126: t  Nominal value = 1; the control units with active data bus are displayed.

Display -V.A.G 1552-	Possible cause of fault	Rectifying fault
if 0 displayed instead of 1	t  CAN databus connection defective	–  Test data bus → Chapter –  Perform the automatic test sequence for interrogation of all fault memories.
	t  CAN databus cables defective - control unit