Jan
The tools needed consist of a simple test light and a
small jumper wire with alligator clip ends. (Jumper wires
are normally sold in pairs. One can be used to construct the
test light below.)
The test light can be constructed with an LED, a 330
ohm 1/4 watt resistor and a jumper wire with alligator clips
at each end.
1) Solder the resistor to the ground (-) side of the
LED.
2) Cut the jumper wire into 2 pieces (make one slightly
longer than the other).
3) Solder the shorter of the 2 wires to the resistor
and the other to the Positive side of the LED.
4) Insulate between the LED leads and at the solder
joints with some electrical tape or shrink wrap tubing.
**CAUTION**: If the car is equiped with an Anti-Theft radio
do not do any tests on the electrical system without knowing
the radio codes.
1988-90 / 4 cylinder / 50 state models - These models have a
test connection near the fire wall and directly behind the
air sensor plate.
1988 / 5 cylinder / California models - Records permanent
faults.
1988 / 5 cylinder / 49 state models - Does not record
permanent faults.
The test light should be connected to the POSITIVE (+)
side of the battery and this test plug. The light should now
be on, if not reverse the wires. California models will
flash the CHECK ENGINE LIGHT for this test.
Turn the igniton to ON but do not start the engine.
Insert a spare fuse into the fuel pump relay for at
least 4 seconds, thenremove.
The beginning of the fault code sequence is a single
flash followed by a 2.5 second pause. The next flash series
is the first fault code.
Fault codes consist of 4 digits
-1st digit evenly spaced flashes, 2.5sec OFF
-2nd digit evenly spaced flashes, 2.5sec OFF
-3rd digit evenly spaced flashes, 2.5sec OFF
-4th digit evenly spaced flashes, 2.5sec OFF
Each 4 digit code will keep repeating until the fuse is
inserted in the fuel pump relay again. When you remove the
fuse the second time the next fault code will flash, this
will continue until you insert the fuse again.
The end-of-fault display is signaled by a 2.5 second ON
light then 2.5 seconds OFF. This is known as code 0000 and
will continue until the ignition is turned off.
1989-March 1990 / 5 cylinder / 49 state and California
models - These models have the two (2) test connectors in
the drivers side footwell. One connector is dark colored and
one is light.
_____
______
Dark
/ \
Light |
\
Connector | ||
| <== + 12VOLTS Connector | || |
<== Not Used
| |
| |
| || | <== GROUND
| || | <== ENGINE
|_______|
|_____/ CONTROL
Connect the test light between the +12VOLTS and the ENGINE
CONTROL.
Using the jumper wire connect the the - ground to the
ENGINE CONTROL for at least 4 seconds then disconnect.
The beginning of the fault code sequence is a single
flash followed by a 2.5 second pause. The next flash series
is the first fault code.
Fault codes consist of 4 digits
-1st digit evenly spaced flashes, 2.5sec OFF
-2nd digit evenly spaced flashes, 2.5sec OFF
-3rd digit evenly spaced flashes, 2.5sec OFF
-4th digit evenly spaced flashes, 2.5sec OFF
Each 4 digit code will keep repeating until the fuse is
inserted in the fuel pump relay again. When you remove the
fuse the second time the next fault code will flash, this
will continue until you insert the fuse again.
The end-of-fault display is signaled by a 2.5 second ON
light then 2.5 seconds OFF. This is known as code 0000 and
will continue until the ignition is turned off.
From March 1990 / 4,5,6 and 8 cylinder - These models have
the three (3) test connectors under the shift column boot or
above the pedals on the drivers side footwell. One connector
is black, one is brown and one is blue.The BLACK connector
is power, the BROWN connector is for the factory fault code
reader #1551 and the BLUE connector is for blink code
output.
_____
______
BLACK /
\
BLUE |
\
Connector | || | <== + 12VOLTS
Connector | || | <= ENGINE
|
|
| | CONTROL
|
|| | <== GROUND
| || | <== not used
|_______|
|_____/
Connect the test light between the +12VOLTS and the ENGINE
CONTROL.
Using the jumper wire connect the the - ground to the
ENGINE CONTROL for at least 4 seconds then disconnect.
The beginning of the fault code sequence is a single flash
followed by a 2.5 second pause. The next flash series is the
first fault code.
Fault codes consist of 4 digits
-1st digit evenly spaced flashes, 2.5sec OFF
-2nd digit evenly spaced flashes, 2.5sec OFF
-3rd digit evenly spaced flashes, 2.5sec OFF
-4th digit evenly spaced flashes, 2.5sec OFF
Each 4 digit code will keep repeating until the fuse is
inserted in the fuel pump relay again. When you remove the
fuse the second time the next fault code will flash, this
will continue until you insert the fuse again.
The end-of-fault display is signaled by a 2.5 second ON
light then 2.5 seconds OFF. This is known as code 0000 and
will continue until the ignition is turned off.
CODE
FAULT
0000 End of fault sequence
1111 Bad ground to Electronic Control Unit (ECU) or ECU
failure-check grounds or replace ECU
1231 Transmission speed sender error. Check wiring of
instrument cluster
2111 Engine speed sender.
2112 Ignition reference sender
2113 Hall sender - No speed signal from distributor; check
Hall sensor and circuits or the Air-flow sensor plate is
not moving freely; adjust potentiometer or lever.
2114 Hall sender not on reference point
2121 Idle switch - check switch,circuit.
2123 Full throttle switch;check switch, circuit.
2141 Knock sensor 1 control at maximum retard - test
compression, change octane, adjust timing, check
knock-sensor wires.
2142 Knock sensor 1 signal; test sensor.
2143 Knock sensor 2 control at maximum retard - test
compression, change octane, adjust timing, check
knock-sensor wires.
2144 Knock sensor 2 signal; test sensor.
2212 Throttle Potentiometer
2231 Idle-speed stabilizer adjustment limits exceeded;
too-fast idle. Adjust throttle for full closing, check for
vacuum leak, check ignition timing
2232 Air mass/flow sensor
2233 Air mass/flow sensor reference voltage open or short
circuit
2234 Supply voltage
2242 CO-potentiometer
2312 Coolant-temperature sensor; check wiring, check
resistance.
2341 Oxygen sensor (O2) at control limit; check CO,
lambda-sensor wire, lambda-sensor control, start valve,
evaporative system and check for vacuum leaks.
2342 Oxygen sensor control; check wire, check sensor.
2343 Rich limit; the pressure regulator has exceeded +10 mA
for more than 5 minutes, closed-loop;check for vacuum leaks.
2344 Lean limit; the pressure actuator has exceeded -5mA for
more than 5 minutes, closed loop; check idle.
2411 EGR system
4312 EGR frequency valve
4331 Carbon canister solenoid valve 2
4343 Carbon canister solenoid valve 1
4411 Fuel injector cylinder 1
4412 Fuel injector cylinder 2
4413 Fuel injector cylinder 3
4414 Fuel injector cylinder 4
4421 Fuel injector cylinder 5
4422 Fuel injector cylinder 6
4423 Fuel injector cylinder 7
4424 Fuel injector cylinder 8
4431 Idle-speed stabilizer valve
4444 No fault in system.
To erase KE-Motronic permanent faults
1) Turn ignition OFF
2) Insert fuse
3) Turn ignition ON
4) After 4 seconds remove fuse, end-of-fault should
display
5) Insert fuse, after 10 seconds, remove fuse.
To erase KE3-Jetronic permanent faults 1) Turn
ignition OFF
2) Insert fuse
3) Turn ignition ON
4) After 4 seconds remove fuse,
5) Insert, remove fuse 3 times until light flashes
4443
6) Insert fuse
7) After 4 seconds, remove fuse, end-of-fault should be
displayed.
8) Insert fuse, after 10 seconds, remove fuse.
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We specialize in German automotive tools for VW, Audi, Mercedes, BMW,
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1-941-927-1414 International
1-941-927-1612 Fax
Baum Tools Unlimited - West
1523 38Th Avenue
San Francisco CA 94122-3011
1-415-566-9229 Tech
1-415-566-0694 Fax
Dana J. Baum - VP R&D
Email: danabaum@crl.com
CIS:71073,270
I am forwarding this from Mike Bigus(gtivr6r@chicagonet.net), the
instructions apply
to a 1995 Golf VR6 but if you look at the diagram in the bottom of
the
page. You
would see the Motronic pin connector for 93 and earlier VR6 car.
Hope that help!
Vincent Shek <vincent@algorithmics.com>
Date: Thu, 19 Dec 1996 23:37:29 -0400
Bryan Robert Schmidt wrote:
>
> I don't have a Bently's manual yet. Planning on getting one
though! How
> do you get the computer to flash the code through the check engine
light,
> or is that in the manual? On my way to get one now!
>
> Bryan Schmidt
> 95 GTI VR6
O.K. here we go, lets take it one step at a time.
Bently Repair Manual page 24a-5
Note: The Motronic systems are equiped with built-in fault
diagnostics. Some of the faults will illuminate the check
engine light, but many will not.
Bently Repair Manual page 24a-6
TO DISPLAY DTCs (Diagnostic Trouble Codes)
1) With the ignition key ON, use a jumper wire or the OBD
adapter to connect terminal 4(ground) to terminal 15(L-wire)
for 2.5 SECONDS and remove the jumper wire or adapter.
See drawing below (1994 and later).
Caution: Use care when connecting the jumper wire. Positive (+)
battery voltage is present in the connector. A wrong connection
can result in damage to ECM (Engine Control Module) or the vehicle's
wiring.
2) After (1) one blink of the check engine light, the first 4-digit
DTC will be displayed. Approximately one second later, the check
engine light will blink the first digit, the npause, blink the second
digit, then pause and so on.
Note: A blink code of 4-4-4-4 indicates that NO malfunctions
have been stored in permanent memory.
3) Once the first DTC has been displayed, reconnect the jumper
wire or the adapter for 2.5 SECONDS and then remove it. The second
DTC code (if present) will be displayed.
4) Repaet step 3 until no more codes are displayed. (DTC 4-4-4-4
displayed)
Note: The 4-4-4-4 code will be represented by four long blinks.
5) Turn the ignition key OFF. Erase the DTC codes once all testing
and repairs have been made.
Bently Repair Manual page 24a-5
Note: On 1996 models cars, a specaial OBD adapter is stored
under the back seat and should be used to access the DTCs.
To Erase DTC Memory
1) With iginition key OFF, connect the jumper wire or the
adapter to the diagnostoc connector.
2) Turn key ON, wait at least 5 SECONDS and then disconnect the wire
or the adapter.
3) Reconnect the jumper wire or adpater for 2.5 SECONDS and then
remove it. The first DTC codes (if present) will be displayed.
4) Repaeat step 3 untill no more codes are displayed. (DTC 4-4-4-4
displayed).
Note: The 4-4-4-4 code will be prepresented by four long blinks.
5) Reconnect the jumper wire or adapter for 2.5 SECONDS and remove it.
The DTC memory is now erased. Turn iginition key OFF.
Note: To confirm the memory has been erased, repeat step 3. There
should be only a 4-4-4-4 code (four long continuous blinks) present.
Your data link connector is located right beside the ashtry. To gain
access to it:
1) remove ashtry (small knob underneath, depress to release from
dashboard).
2) slide cover left to open (right hand side, beside ashtry receptical)
You should see a purple 16 pin connector.
Insert wire one end of wire in (top row) 4th in from left
and the other end (bottom row) 2nd from right
See diagram below (1994 and later)
Hope this helps, and good luck.
Please keep us posted on your progress.
--
Mike
MIke Bigus => GTiVR6r@ix.netcom.com >>Plate No. GTi NUT
1<<
'96 GTi VR6 Tornado Red "Group Six" Many mods!
Abe Getchell is a bad influence on me & my wallet! ;-)
It's very easy to extract fault code on my 94 Canadian spec Corrado.
The earlier(< 94) Corrado has a different motoronic system and I
will
explain that in my next email.
I learned this(work on for 94 C) from Steve Cockwell. Thanks Steve!
Here is his earlier post:
=======================================================================
DISCLAMER:
I've got a 1994 Corrado VR6 (Canadian). I take no responsibility
for this
information beyond that it works for my vehicle.
INFO:
The connecter under the boot of your SLC has 16 holes consisting of
two
rows of 8. It looks like this:
oooooooo
oooooooo
To get the DTCs from your C you simply jumper the second hole from the
left
on the top row (closest to your vehicle's engine) to the 5th hole from
the
left on the second row (closest to you (unless you're sitting on the
dash
:-))
In ascii:
|---|
| o+oooooo <- connector front (engine side)
| oooo+ooo <- connector back (passenger side)
|------|
^
|
Jumper Wire
With the car running (make sure you START the car - In my experience
if you
try to get DTC info from the car without fully starting it it reports
that
your injectors are malfunctioning! :-)
Small aside there... With the car running jumper these two connectors
for
3 to 5 seconds. Remove the jumper and watch your engine light.
First the engine light will flash, then pause, and then it will begin
giving you the codes. Right now my O2 Sensor is dead, so it does
this:
ON - PAUSE - OFF -
FLASH FLASH - OFF (code #2)
PAUSE - FLASH FLASH FLASH - OFF (code #3)
PAUSE - FLASH FLASH FLASH FLASH - OFF (code #4)
PAUSE - FLASH FLASH - OFF (code #2)
ON - PAUSE (long)
So the total code is 2,3,4,2 which means "Spend $219 on a new O2 sensor!"
The car will continue to flash the same code. When it is finished
with a
code it will turn the engine light on for about 5 seconds. Then
it will do
it all over again giving you the SAME code. To get the next code
you have
to jumper the connectors again.
Eventuallly, you will have seen all of the stored codes. The computer
will
give you four long flashes of the engine light to indicate this.
If you
jumper the connector ONE more time, it will go black and not come on
again.
At this point the codes are cleared.
If you have any questions about this, let me know.