TPI TBI CCC troubleshooting, data (codes, wiring, swaps etc)

[dyeager535]

11-11-05
Updated with ALDL cable links

OK, finally got the time/inclination to do something for those that don't have service manuals, or those that do and just don't want to scan this stuff in, or want to read it at work, etc.

As you will see, Trickster over on thirdgen.org has been nice enough to scan all of these charts in. Be forewarned, these are F-body diagrams, so you TBI/CCC folks should be careful, but you will find most things are identical I'm sure.

Not complete of course, but at least everything I could find is now in one post. I will update as I find more. PM me (if you can) and have more charts to add, that way the thread doesn't get bogged down with responses unnecessarily.

Chevythunder code/troubleshooting list

I can't vouch for those. Not factory scans, but look to be the same info in a slightly different format.

1990 R/V truck wiring diagrams

ALDL pinout

ALDL cable scematics

Ignition system test This is for TPI, but should be pretty close to TBI as well. Some of the tests I guarantee are.

Identifying TPI system differences

Vehicle repair guides Check these out for wiring diagrams, etc. Can't vouch for how good the quality is, but I see that our trucks are listed.


TBI

O2 Open circuit

Codes 15/23/32 CTS coolant temp low/MAT sensor low temp/EGR

Code 24 VSS

Code 42 EST

Code 43 EST

TPI

MAF wiring diagram

MAP interior harness connector pinout

Codes 15/45 coolant temp/O2 sensor 2.8L port

Code 23 Inlet Air Temp (IAT) low temp indicated

Code 24 VSS

Code 32 EGR

Codes 33/36 MAF gm/sec high and MAF burnoff

Code 34 MAF gm/sec low

Code 41 Cylinder Select Error

Code 42 EST

Code 44 O2 lean

Code 54 Fuel pump circuit low voltage



CCC

Code 23 M/C Solenoid volts low to ECM

Code 24 VSS

Code 32 Baro sensor

Injection specific:
crank no run 1

crank no run 2

External coil, pickup testing

MAP voltage/baro/vacuum chart

C100 (fuse panel) connector '85/89 Camaro

I also have the entire GM TBI/TPI troubleshooting sections, '89 Camaro, in .pdf (about 2MB each) if someone is interested in hosting those somewhere that I can point people to, PM if so. The TBI Camaro stuff is identical to truck in almost every regard.

 

[southernspeed]

Good work fella. Interesting info source for the future

 

[uglyangelracing]

I am trying to install a 1987 z28 TPI onto my 1985 K5. Has anyone on here done this? I am trying to find instructions on it. I have the intake, entire wireing harness from engine compartment, computer, sensors.

What can I eliminate from the stock harness?

Do I need the harness from inside the car?

Is there a book thats any good on this?

 

[dyeager535]

Since I can't PM you:

Please delete your post in this thread, and create a new one with a title reflecting your goal. I (and others I'm sure) will be happy to post my experiences/opinions installing '87/88 TPI into my '86. Of course, search will answer a lot of specifics as well, a few of us have done the TPI conversion.

 

[y5mgisi]

very nice!