Fault Memory, Activating/Cancelling

Note

The fault memory must first be activated before it can be cancelled.

Recalling

Requirements
^ fuses 15, 18, and 21 OK
^ A/C switched OFF
^ engine ground connections OK, near ignition distributor, at engine block and the ground strap between the cylinder head and the ignition coil power output stage

^ test drive vehicle for at least 5 minutes

During test drive
^ coolant temperature must reach 80~C (176~F) minimum
^ engine speed must exceed 3000 RPM at least once
^ accelerator pedal must be fully depressed at least once


CAUTION

After test drive, allow engine to idle for at least 2 minutes before starting diagnosis.

If engine will NOT start

^ operate starter for about 6 seconds
^ switch OFF ignition





^ connect VAG 1551 with adaptor cable VAG 1551/1 as follows
^ connect black wire to black diagnostic connector 1
^ connect white wire to white diagnostic connector 2
^ blue wire not used

Following display appears:

VAG - SELF-DIAGNOSIS HELP

1 - Rapid data transmission*

2 - Flash code output*

*appears alternately

^ turn on VAG 1551 printer with "print" button
^ indicator lamp in button lights up

^ switch ON ignition
^ press button "1"
^ selects "rapid data transmission" operating mode

Following display appears:

Rapid data transmission HELP

Input address word XX

^ press buttons 0 and 1 to select function 01:
"engine electronics"


Following display appears:

Rapid data transmission Q

01 - engine electronics

^ acknowledge input by pressing "Q" button The control unit identification appears on the display, for example:

893907404 F ENGINE

coding 00

If following display appears:

Control unit does NOT respond!
HELP

^ press HELP button
^ list of possible fault causes will print


^ after eliminating possible fault causes, re-input function "engine electronics"
^ press -> button
Following display appears:

Rapid data transmission
HELP
Select function XX

^ press "O" and "2" buttons to input 02 function:
"fault memory activation"
Following display appears:

Rapid data transmission Q
02 - fault memory recall

^ acknowledge by pressing "Q" button
The number of stored faults or "no faults registered!" is displayed:

X Fault(s) registered!

^ press -> button
^ stored faults are displayed and printed consecutively


Cancelling fault memory

After display and print out of the last fault

^ press -> button

Note

If there is a complaint that has not been registered by self-diagnosis, perform further troubleshooting using the troubleshooting guide, section D2-60.

Following display appears:

Rapid Data Transmission HELP

Select Function XX

^ press "0" and "5" buttons
Following display appears:

Rapid Data Transmission Q
05 - cancel fault memory

^ acknowledge by pressing "Q" button Following display appears:


CAUTION

Faults were not recalled from fault memory.

^ follow work procedure sequentially, i.e., first recall faults from fault memory


CAUTION

If the ignition is switched off or the engine is run between fault memory activation and fault memory cancellation stages, FAULT MEMORY IS NOT CANCELLED.

If the fault memory is cancelled, the following display appears:

Rapid Data Transmission

Fault memory is cancelled!

^ eliminate any faults using fault table, see section D2-40
^ test drive vehicle
^ recall fault memory, verify that all faults have been corrected