Volkswagen Workshop Service and Repair Manuals > Golf Mk3 > Power unit | Motronic injection and ignition system from 08.95 | Ignition system, glow plug system | Motronic injection and ignition system

Motronic injection and ignition system from 08.95

Motronic injection and ignition system

Checking misfire detection

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 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 1, 1 and 0 for "Display group number 110" and confirm entry with Q key.

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

Read measured value block 110 ⇒

1 2 3 4

	Display zones
	1	2	3	4
Display group 110: Misfire detection 1
Display	x.xx ms	xxx	xxx	xxxxxxxx
Indicated	Engine load	Misfiring impairing exhaust gas (total)	Misfiring impairing catalyst (total)	Misfiring detection status
Working range	0.00...25.00 ms	---	---	---
Specification	1.00...3.00 ms	0	0	00000000
	---	If the specification is not attained , evaluating display group 110

‒ Read-out the readiness code=> Page 01-35 .
‒ Press ⇒key.
‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.

Evaluating display group 110


Display group: 110
Display zone: 2 + 3	Possible fault cause	Fault elimination
More than 25	Ignition transformer defective Ignition cable defective Spark plug defective	- Check ignition transformer => Page 28-1
	Injector defective Fuel shortage	- Check injectors => Page 24-117 Check quantity of fuel in tank

Volkswagen Workshop Service and Repair Manuals