Re: '89 100Q Fault code dump

[Andrew Duane USG/PE <duane@zk3.dec.com>]

Hairy green toads from Mars made Stadmeyer, Francis say:

> I hate to ask for the proceedure to dump the codes since I know it's in
> the archives,  but I have only saved bits and pieces of it in my
> personal files and the company has screwed with outside Internet access
> (again) so I can't search the archives from work.

Well, it just so happens that my Bentley is sitting next to me
on my desk (don't ask).  So, here's what section D2-230 has to say:

TIP: Before activating fault display, check ground connections for
     corrosion or broken wiring between the engine compartment and
     the intake amnifold and between the ignition coil power output
     stage and its components.

Also, check fuses 12, 24, and 28 are OK.

Fault codes are a series of blinks on the check engine light.
A fault code is 4 digits, each of which is 1, 2, 3, or 4. The
digit is how many blinks are 0.5 seconds apart, digits are
separated by a 2.5 second pause.


Start engine, test drive at least 5 minutes, greater than 3000 RPM,
momentarily press gas pedal to floor. Then let idle.

Dump the first code by inserting a spare fuse in the top of the fuel pump
relay (it's the one with the fuse slot in the top) for at least 4 seconds. 
The code will blink as long as the car is on, until the next code is dumped.

Advance to the next code (if any) by reinserting the fuse for 4 seconds.

4444 means no faults stored.

0000 means no more faults.

Fault codes:
1111 control unit defective.
1231 trans speed sender
2121 idle switch
2122 engine speed signal missing
2123 full throttle switch
2141 first knock regulator limit exceeded
2223 altitude sensor
2233 air flow sensor reference voltage
2312 coolant temperature sensor
2341 O2 sensor regulator limit exceeded
2342 O2 sensor no signal
4431 idle stabilizer valve

(california only):
2132 data wiring defective
2411 EGR system

-- 

Andrew L. Duane (JOT-7)			duane@zk3.dec.com
Digital Equipment Corporation		(603)-884-1294
110 Spit Brook Road
M/S ZKO3-3/U14
Nashua, NH    03062-2698

Only my cat shares my opinions, and she's too heavy to care.