Volkswagen Workshop Service and Repair Manuals > Passat (B3) > Power unit | Motronic fuel injection and ignition system 08.95 | Ignition system, glow plug system | Motronic injection and ignition system

Motronic fuel injection and ignition system 08.95 ä

Motronic injection and ignition system

Checking ignition timing

Special tools, testers and auxiliary items

◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3

Test conditions

● Electrical consumers switched off (radiator fan must not run during the check)
● Air conditioner switched off

Test sequence

‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select engine electronics control unit with the "Address word" 01. When doing this the engine must be running at idling speed.
(Connecting fault reader and selecting engine electronics control unit .)

→ Indicated on display:

Rapid data transfer HELP

Select function XX

‒ Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

→ Indicated on display:

Read measured value block HELP

Input display group number XXX

‒ Press keys 0, 1 and 0 for "Display group number 10" and confirm entry with Q key.

→ Indicated on display:
(1...4 = Display zones)

Read measured value block 10 ⇒

1 2 3 4

	Display zones
	1	2	3	4
Display group 10: Ignition 1
Display	xxx rpm	xx.x ms	xx.x <°	xx.x <°
Indicated	Engine speed	Engine load	Ignition angle (mapped value)	Ignition angle
Working range	800...6000 rpm	0.0...25.0 ms	0.0...50.0 <°BTDC	0.0...40.0 <°BTDC
Specification	800...880 rpm	1.5...2.5 ms	11.0...13.0 <°BTDC	Max. ±2.0<°deviation from display zone 3
	---	---	Test condition: ▪ Intake manifold temperature max. 50°C If specification is not attained , checking throttle valve control part

‒ Read-out the readiness code=> Page 01-34 .
‒ Press ⇒key.
‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.

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