RE: [alfa] Late Model Spider Airbag Light Reset Procedure Requested

["J. Hutson Hart" <hutsonhart@xxxxxxxxxxx>]

I myself wrote, in part:

>>Subject: [alfa] Late Model Spider Airbag Light Reset Procedure Requested
>>Can anyone please outline the complete procedure for reading and
>>resetting airbag light error codes on a late model Spider?

Well, as is often the case, the system will out in the end, with
persistence.  I was able to find Ferdinando Di Matteo's fine
procedural description posted back in 1997, culled for the ARDONA
service bulletins with his additional comments.  Included here for
others' reference, slightly edited for formatting and clarity.  Enjoy!

From: FERDINANDO DI MATTEO < fredalfa@domain.elided
<mailto:fredalfa@domain.elided> >
Date: Tue, 15 Apr 1997 17:39:07 -0400
Subject: Re: Air Bag Light

Subject: Series 4 Spider Air Bag Codes Reset Procedure

[Note: This procedure applies to 91-93 164s as well]

When you pull the 4 connector test connector from under the square hole
behind the passenger's seat, you will see the connector is marked ABCD -
A being the LT Blue/black
B being the Black
C being the Green/White
D being Pink.

TO RETRIEVE [DISPLAY] FAULT CODES
Note: Since the connectors are the round female type, you'll need to
fashion a short jumper wire to use in the following steps.
1. Remove the square panel cover on the parcle shelf behind the
passenger's seat.
2. With the ignition key OFF, attach the jumper wire to the test
connector described above, bridging terminals A & B.
3. Turn on the ignition key.
4. Observe the AIRBAG warning light;  it will flash once, followed by
a short pause, then flash twice.  This represents code 12, which is an
indication that the trouble shooting procedure is "running".  Code 12
will be repeated 3 times. (Example: 12-12-12)
5. If fault codes are stored, they will follow the code 12 sequence
and the AIRBAG warning light will flash a 2-digit fault code 3 times
for each fault indication stored in the memory.  (Example: 26-26-26)
6. When the fault memory is empty, the AIRBAG warning light will again
flash 12-12-12 to indicate all of the stored fault codes have been
displayed.

(Example for one code: 12-12-12-26-26-26-12-12-12)
(Example for two codes:  12-12-12-25-25-25-26-26-26-12-12-12)

TO CLEAR FAULT CODES AFTER REPAIR
1. Carry out the procedure outlined above to view all stored fault codes.
2. When the fault memory is empty, and the AIRBAG warning light is
flashing 12-12-12 again (indicating "end of codes") disconnect the
jumper wire at the test connector for EXACTLY 3 seconds.
3. Re-connect the jumper wire at the test connector for EXACTLY 3 seconds.
4. Remove the jumper wire from the test connector, and quickly turn
off the ignition key.
5. Wait 10 seconds, then turn on the ignition key to allow the AIRBAG
ECU to test the system.  If there are no faults present, the AIRBAG
warning light will come on with the key, then go off after 5 to 8
seconds, then remain off.  If there are still faults present in the
system, the AIRBAG warning light will come on with the key, go off
after 5-8 seconds, then begin flashing again.  If the AIRBAG warning
light begins to flash immediately after turning on the ignition key,
the previous fault codes HAVE NOT BEEN CLEARED
6. If the AIRBAG warning light flashes again indicating that there are
one or more faults present in the system, extract the fault code(s),
repair the fault(s), and clear the fault memory again.

YOU ARE REMINDED THAT ALL AIRBAG DIAGNOSTIC PROCEDURES OUTLINED IN
THIS BULLETIN AND IN THE WORKSHOP MANUAL SHOULD BE FOLLOWED EXACTLY AS
STATED TO PREVENT THE POSSIBILITY OF ACCIDENTAL AIRBAG DEPLOYMENT.

Code    Malfunction

14      Forward LH Sensor grounded the chassis
15      Open circuit on forward LH sensor
16      Failure to forward LH sensor
24      Forward RH sensor grounded to chassis.
25      Open circuit on forward RH sensor
26      Failure to forward RH sensor
31      Current leakage to battery
32      Current shorted to battery voltage
33      Current leakage to ground
34      Current shorted to ground
35      Open circuit
36      Faulty squib
41      Short to ground/battery-warning lamp
42      Failure of AIRBAG warning lamp
51      Faulty diagnostic unit
52      Firing sequence confirmation set
54      Squib current has flowed

That is all I have for AIRBAG faults and procedures.  Do not ask me
what a squib is or some of the other nomenclature.  The same test
procedure goes for 164s too.  You'd have a fit trying to find the test
connector so I'll be kind and tell you where to find it in 164s.  On
the passenger side, below the glove box and behind the carpet up high.

If there are any faults, there almost is never a problem with a
component, loose, dirty or corroded conections are to blame.  This is
an ideal set of circumstances to use Stabilant 22, the miracle remedy
on all contacts.

Thanks to the Master - Ferdinando Di Matteo - RIP
Cheers!
Hutson - 1991 Spider

Petaluma, CA  94954-8530
ping: hutsonhart@domain.elided <mailto:hutsonhart@domain.elided>
SEE YOU AT CONCORSO ITALIANO IN AUGUST !!!
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