Volkswagen Workshop Service and Repair Manuals > Golf Mk3 > Power unit | Motronic injection and ignition system from 08.95 | Mixture preparation system, electronic inj.,Gas | Motronic injection and ignition system

Motronic injection and ignition system from 08.95

Motronic injection and ignition system

Checking engine operating mode

Note:

Check establishes whether Motronic control unit (J220) recognises the engine operating condition.

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

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, 0 and 5 for "Display group number 5" and confirm entry with Q key.

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

Read measured value block 5 ⇒

1 2 3 4

‒ Check whether the control unit recognises the operating mode (display zone 4):


	Display zones
	1	2	3	4
Display group 5: General engine data
Display	xxx rpm	xx.xx ms	xxx km/h	Idling
Indicated	Engine speed	Engine load	Vehicle speed	Operating mode
Working range	800...6000 rpm	0.00...25.00 ms	---	---
Specification	800...880 rpm	---	0 km/h	Idling = Idling Part load = Throttle valve slightly open Enrich. = Rev-up above 3000 rpm, then overrun = Close throttle valve abruptly Full load = Only possible when driving

If the specifications are not attained:

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