Skoda Workshop Service and Repair Manuals

Display groups 001 to 022, engine idling Display group 001 in idle (engine warm, coolant temperature not below 75°C)

Read measured value block 1 →				[lt ] Readout on display
xxx rpm	xx.x mg/s	x.xx °KW	xxx.x °C
1	2	3	4	[lt ] Display field	Specification	Analysis
				Coolant temperature	75.0 … 110.0 °C	---
			Fuel delivery duration (set value)		4...7 °KW 1) 5...8 °KW 2)	---
		Injection rate			3.0…9.0 mg/H	→ Anchor
	Idling speed				800…970 rpm	---

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Analysis: Display group 001, display field 2 - Injection rate

Display -V.A.G 1552-	Rectifying fault
below 3.0 mg/s	–  Testing unit injector valve → Chapter.
above 9.0 mg/s	–  Warm up engine by running at high revs and repeat test. –  Testing unit injector valve → Chapter.

Display group 002 in idle (engine warm, coolant temperature not below 75°C)

Read measured value block 2 →				[lt ] Readout on display
xxx rpm	xxx.x %	x x x	xxx.x °C
1	2	3	4	[lt ] Display field	Specification	Analysis
				Coolant temperature	75.0 …110.0 °C	---
			Operating position		1 1 0	→ Anchor
		Accelerator pedal position			0,0 %	→ Anchor
	Idling speed				---	→ Anchor

Analysis: Display group 002, display field 2 - Accelerator pedal position

Display -V.A.G 1552-	Rectifying fault
1…100,0 %	–  Test accelerator pedal position sender -G79- → Current flow diagrams and Fitting locations.

Analysis: Display group 002, display field 3 - Operating position

Meaning, if display positions = 1
X	X	X	Operating position
		1	Air conditioning switched on
	1		Idling switch closed (accelerator pedal not pressed)
1			Ignore

Display group 003 in idle (engine warm, coolant temperature not below 75°C)

Read measured value block 3 →				[lt ] Readout on display
xxx rpm	xxx mg/s	xxx mg/s	xxx %
1	2	3	4	[lt ] Display field	Specification	Analysis
				On/off ratio (actuation) of exhaust gas recirculation valve	30…80 %	---
			drawn in air mass (actual)		258...410 mg/H 1) 230...370 mg/H 2)	→ Anchor
		drawn in air mass (nominal)			278...390 mg/H 1) 230...360 mg/H 2)	→ Anchor
	Idling speed				---	→ Anchor

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Display group 003, display field 2 - inducted air mass (set value)

Display -V.A.G 1552-	Rectifying fault
above 390 mg/H 1) above 360 mg/H 2)	–  Warm up engine by running at high revs and repeat test.

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Display group 003, display field 3 - inducted air mass (actual value)

Display -V.A.G 1552-	Rectifying fault
above 258 mg/H 1) above 230 mg/H 2)	–  Testing exhaust gas recirculation → Chapter –  Inspect intake system for leaks.
above 410 mg/H 1) above 370 mg/H 2)	–  Warm up engine by running at high revs and repeat test. –  Engine idles for too long, briefly blip throttle. –  Test air mass meter -G70- → Current flow diagrams and Fitting locations.

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Display group 004 in idle (engine warm, coolant temperature not below 75°C)

Read measured value block 4 →				[lt ] Readout on display
xxx rpm	xx.x ° b. TDC	xx.x °KW	xx.x °KW
1	2	3	4	[lt ] Display field	Specification	Analysis
				Synchronizing angle	-3...+3 °CA	→ Anchor
			Fuel delivery duration (set value)		4,0...7,0 °CA 1) 5...8 °CA 2)	---
		Commencement of injection (set value)			3…9° BTDC 1) 0…4° v. BTDC 2)	→ Anchor
	Idling speed				---	→ Anchor

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Analysis: Display group 004, display field 2 - commencement of injection (set value)

Display -V.A.G 1552-	Rectifying fault
less than 3° BTDC 1) less than 0° BTDC 2)	–  Engine too cold, warm up engine by running at high revs and repeat test.

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Analysis: Display group 004, display field 4 - Synchronizing angle

Display -V.A.G 1552-	Rectifying fault
above 3°KW or under -3°KW	–  Test camshaft position sensor -G40- → Current flow diagrams and Fitting locations. –  Inspect position of camshaft and rotor → 1.4/51; 55; 59 TDI Engine, Mechanics; Rep. Gr.15.

Display group 005 in idle (engine warm, coolant temperature not below 75 °C)

Read measured value block 5 →				[lt ] Readout on display
xxx rpm	xx.x mg/s	xx.x ° b. (n.) TDC	xxx.x °C
1	2	3	4	[lt ] Display field	Specification	Analysis
				Coolant temperature	75…110 °C	---
			Synchronisation when starting		1	---
		drawn in air mass when starting			9…15 mg/H	---
	Idling speed				---	→ Anchor

Display group 006 in idle (engine warm, coolant temperature not below 75°C)

Read measured value block 6 →				[lt ] Readout on display
xxx km/h	xxx	xx.x %	xxx
1	2	3	4	[lt ] Display field	Specification	Analysis
				Operating condition of the cruise control system	xxx	→ Anchor
			Accelerator pedal position		0 %	→ Anchor
		Status of the brake and clutch pedal switch			000	→ Anchor
	Vehicle speed				0 km/h	---

Analysis: Display group 006, display field 2 - Brake pedal or clutch pedal monitoring

Meaning, if display positions = 1
X	X	X	Operating position
		1	Brake light switch -F- closed (brake pedal operated)
	1		Brake pedal switch -F47- opened (brake pedal operated)
1			Clutch pedal switch -F36- opened (clutch pedal operated)

Analysis: Display group 006, display field 4 - Operating condition of cruise control system

Display	Operating position
0	Vehicles with activated cruise control system, switch in position “OFF”
1	Vehicles with activated cruise control system, switch in position “ON”
255	Vehicle without cruise control system or cruise control system function in engine control unit not activated

Display group 007 with ignition switched on (engine cool and standing)

Read measured value block 7 →				[lt ] Readout on display
xxx.x °C	xxx %	xxx.x °C	xxx.x °C
1	2	3	4	[lt ] Display field	Specification	Analysis
				Coolant temperature	approx. ambient temperature 1)	→ Anchor
			Intake manifold temperature		approx. ambient temperature 1)	→ Anchor
		Status of the fuel cooling			0 %	---
	Fuel temperature				approx. ambient temperature 1)	→ Anchor

1) It is not possible to give a nominal value indication for temperatures. Once the engine has cooled down the temperatures of the fuel, intake manifold and coolant must approximately correspond with the ambient temperature. If there is a marked value difference check the relevant sender.

Analysis: Display group 007, display field 1 - Fuel temperature

Display -V.A.G 1552-	Rectifying fault
40.5 °C	–  Testing Fuel temperature sender -G81- → Chapter.

Analysis: Display group 007, display field 3 - Intake manifold temperature

Display -V.A.G 1552-	Rectifying fault
approx. 135.9 °C	–  Testing Intake manifold temperature sender -G72 - → Chapter.

Analysis: Display group 007, display field 4 - Coolant temperature

Display -V.A.G 1552-	Rectifying fault
-5.4 °C	–  Check sender for coolant temperature -G62- → Chapter. In the event of a fault the fuel temperature is displayed instead.

Display group 010 in idle (engine warm, coolant temperature not below 75 °C)

Read measured value block 10 →				[lt ] Readout on display
xxx mg/s	xxxx mbar	xxxx mbar	xxx %
1	2	3	4	[lt ] Display field	Specification	Analysis
				Accelerator pedal position	0,0 %	→ Anchor
			Charge pressure (actual)		900...1150 mbar	---
		Atmospheric pressure			900...1100 mbar	---
	drawn in air mass (actual)				258...410 mg/H 1) 230...360 mg/H 2)	→ Anchor

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Display group 011 in idle (engine warm, coolant temperature not below 75°C)

Read measured value block 11 →				[lt ] Readout on display
xxx rpm	xxxx mbar	xxxx mbar	xx %
1	2	3	4	[lt ] Display field	Specification	Analysis
				On/off ratio (actuation) of solenoid valve for charge pressure control -N75-	25…95 %	---
			Charge pressure (actual)		900…1150 mbar	---
		Charge pressure (nominal)			900…1100 mbar	---
	Idling speed				---	→ Anchor

Display group 013 in idle (engine warm, coolant temperature not below 75°C)

Read measured value block 13 →				[lt ] Readout on display
x.xx mg/s	x.xx mg/s	x.xx mg/s
1	2	3	4	[lt ] Display field	Specification	Analysis
			Smooth running control - injected quantity cylinder 3		-3…+3 mg/H 1) -2.8…+2.8 mg/H 2)	→ Anchor
		Smooth running control - injected quantity cylinder 2			-3…+3 mg/H 1) -2.8…+2.8 mg/H 2)	→ Anchor
	Smooth running control - injected quantity cylinder 1				-3…+3 mg/H 1) -2.8…+2.8 mg/H 2)	→ Anchor

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Analysis: Display field 013, display field 1 through 3 - Idle smoothness regulator t  The injection system has an idle smoothness regulator. It is possible to detect differences in performance between individual cylinders (part tolerances, injector flow, compression etc.) and to compensate for these by selectively metering the quantity injected in the idling speed range. t  Differences are detected in the idling speed range on the basis of the signal supplied by the engine speed sender which supplies three signals to the control unit for each crankshaft revolution. If the signals have the same rhythm, the cylinder have the same output. If a cylinder has a lower output, the crankshaft will need more time for the next half crankshaft rotation. As opposed to this a high output cylinder will accelerate the crankshaft to such an extent that it will need less time. t  Once the control unit has identified a deviation, the corresponding cylinder will immediately be supplied with a greater or smaller injection rate until the engine again runs “smoothly”. t  +… mg/s: The relevant cylinder has less output and is therefore supplied with more fuel. t  -… mg/s: The relevant cylinder has more output and is therefore supplied with less fuel. Display group 016 in idle

Read measured value block 16 →				[lt ] Readout on display
xxx %	xxxxxxxx	xx	xx.x V
1	2	3	4	[lt ] Display field	Specification	Analysis
				Supply voltage of the engine control unit	13.5…14.5 V	→ Anchor
			Heating element control		xx	→ Anchor
		Auxiliary heating			1x000001	→ Anchor
	Generator capacity				5…95 %	---

Analysis: Display group 016, display field 2 - Auxiliary heating

Meaning, if display positions = 1
X	X	X	X	X	X	X	X	Additional heating deactivated, because:
							1	Coolant temperature greater than 70...80°C or intake air temperature greater than +5°C
						1		Generator defective
					1			Battery voltage below 9 V
				1				Engine speed less than 800 rpm
			1					Engine start within the last 10 seconds
		1						Coolant temperature sender -G62- or Intake manifold temperature sender -G72- defective
	1							do not observe 1) / additional heating Zusatzbeheizungsforderung 2)
1								Ignore

1) for engine with identification characters AMF

2) for engine with identification characters BNM, BNV

Analysis: Display group 016, display field 3 - Control of the heating elements

Meaning, if display positions = 1
X	X	Operating position
	1	Low heat output relay -J359- on
1		High heat output relay -J360- on

Analysis: Display group 016, display field 4 - supply voltage of engine control unit

Display -V.A.G 1552-	Rectifying fault
below 13.5 V	–  Test generator and battery voltage, charge battery → Electrical System; Rep. Gr.27. –  Increase engine speed slightly for a few minutes and switch off additional consumers. –  Check the supply voltage of the engine control unit → Chapter. –  Rectify any current drain.
above 14.5 V	–  Test voltage regulator, replace if necessary → Electrical System; Rep. Gr. 27. –  Remove start aid cable or quick charger.

Display group 018 in idle

Read measured value block 18 →				[lt ] Readout on display
xx	xx	xx	xx
1	2	3	4	[lt ] Display field	Specification	Analysis
				Ignore
			Unit injector solenoid valve cyl. 3		0	→ Anchor
		Unit injector solenoid valve cyl. 2			0	→ Anchor
	Unit injector solenoid valve cyl. 1				0	→ Anchor

Analysis: Display group 018, display field 1 through 3 - Display of the conditon of the unit injectors

Display -V.A.G 1552-	Rectifying fault
If number instead of zero	–  Testing unit injector valve → Chapter. –  Inspecting fuel supply → 1.4/51; 55; 59 TDI Engine, Mechanics; Rep. Gr.20.

Display group 022, engine idling

Read measured value block 22 →				[lt ] Readout on display
x	xxxxxx	x	x
1	2	3	4	[lt ] Display fields	Specification	Analysis
				Operating state of air conditioning	0	—
			Operating state of charge pressure control		0	—
		Operating state of cruise control			xxxxxx	→ Anchor
	Operating condition of the cruise control system				x	→ Anchor

Analysis: Display group 022, display field 1 - Operating condition of cruise control system

Operating condition of the cruise control system
0				Vehicle without CCS, or CCS function in engine control unit not activated
1				Vehicles with activated CCS, switch in position “OFF”
9				Vehicles with activated CCS, switch in position “ON”

Analysis: Display group 002, display field 2 - Operating condition of cruise control system

Cruise control	Display field 2
Switch B on “ON”	000011
Switch B on “RES”	001011
Switch A operated	000111
Switch B to “OFF” before operating point	000001
Switch B to “OFF” locked	000000