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ECU pinouts for '93-'95 PGT's (OBD-1)

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  • ECU pinouts for '93-'95 PGT's (OBD-1)

    Ok, this is just a reference post. I arranged the pinouts by row left to right and in order of connector while looking at the ECU and wires as it is installed while in the car.

    (PS-I posted this about 8 mos ago but I made an error on the pinout order...oops )

    Here's the text file link . Also, here are the pics that this pinout is based off (this is looking at the harnesses from the pinout side not the wire side):
    '93 ECU pinout harness #1
    '93 ECU pinout harness #2
    '93 ECU pinout harness #3
    '94 ECU pinout harness #1
    '94 ECU pinout harness #2
    '94 ECU pinout harness #3
    '95 ECU pinout scan #1
    '95 ECU pinout scan #2

    I used Mike Palmer's website (this section of his site is now deleted) as the comparison between the '94's and '95's. The '93 pin additions and corrections to the '94 pinouts courtesy of the scans initially from TakimanPGT, but have now been replaced by pics from KevinD. Also, the '94, '96, '97 ECU's (OBD-II in a seperate post) are also courtesy of KevinD. Thanks Kevin!

    ECU pinout '94 vs '95 pin differences [in brackets]/'93 differences in double asterisk (**) {Omaha95PGT-Marc M.}

    Connector C246 (the left connector with 26 pins)
    this pinout is facing the ECU/harnesses while it's still plugged in the car with the wires coming out at you.

    1 2 3 4 5 6 7 8 9 10 11 12 13
    14 15 16 17 18 19 20 21 22 23 24 25 26

    1) #5 fuel injector
    2) #3 fuel injector
    3) #1 fuel injector
    4) not used
    5) Idle Air Control (IAC) solenoid output
    6) Exhaust Gas Recirculation (EGR) vent solenoid
    7) Fuel Pressure Regulator Control (FPRC) solenoid output
    8) not used
    9) VRIS #1 output
    10) Ground Signal (Cylinder Identification [CID]) input
    11) NE1 CKPS input (probably the camshaft position sensor in the distributor) ['95 not used]
    12) Ground (CPU)
    13) Ground (out)
    14) #6 fuel injector
    15) #4 fuel injector
    16) #2 fuel injector
    17) Fuel Pump Relay output
    18) not used ['95 Crankshaft Position Signal (CPKs)]
    19) EGR vacuum solenoid
    20) High condenser-fan ['95 low speed condenser fan control-I think it's the same]
    21) Low cooling-fan
    22) VRIS #2 output
    23) Cylinder Identification (CID) signal
    24) NE2 CKPS ground ['95 Crankshaft Position Signal (CKPS) ?ground]
    25) Ground (input)
    26) Ground (out)

    Connector C247 (middle connector with 16 pins)

    1 2 3 4 5 6 7 8
    9 10 11 12 13 14 15 16

    1) Canister purge solenoid output
    2) Knock sensor input
    3) IAT input
    4) +5V reference out
    5) not used **'93 Engine Coolant Temp (Fan) [ECTF]**
    6) Engine Coolant Temp Sensor (ECTS) input
    7) Right Heated O2 Sensor (RHO2S) input <front head>
    8) BARO sensor output (ATX)
    9) High coolant fan (aka high speed condenser fan control)
    10) not used
    11) DRL load (Canadian only) (Daytime Running Lights)
    12) Exhaust Gas Recirculation (EGR) valve position input
    13) A/C High pressure input
    14) Throttle Position Sensor (TPS) input
    15) Left Heated O2 Sensor (LHO2S) input <rear head>
    16) Volumetric Air Flow (VAF) sensor input

    Connector C248 (the right connector with 22 pins)

    1 2 3 4 5 6 7 8 9 10 11
    12 13 14 15 16 17 18 19 20 21 22

    1) Module ground
    2) Reduce Torque Signal 1 input (ATX)
    3) Brakelamp load input (ATX)
    4) A/C dash switch [on/off] and Low Pressure input
    5) VSS input (Vehicle Speed Sensor [+])
    6) Torque reduced signal output
    7) TEN DLC pin (Test ENgine Data Link Connector) (ATX)
    8) Ignitor output (aka Distributor Ignition)
    9) Check Engine Lamp (CEL) Output
    10) START signal input
    11) Memory Backup Power/Keep Alive Power
    12) Torque Reduce Signal 2 Input (ATX)
    13) Idle switch input (closed Throttle input)
    14) Neut./Clutch switch input
    15) Blower load (motor on) input
    16) Power Steering Pressure input
    17) A/C & low condenser fan [95 A/C relay Output ?same]
    18) Rear Window Defrost Load input
    19) Headlamp load input
    20) FEN DLC pin (Data Link Connector)
    21) MEN DLC pin (Data Link Connector)
    22) Main PCM Power

    keywords: PCM ECU pinout computer wires wire harness pin out
    Last edited by Omaha95PGT; April 11, 2004, 05:59 PM.
    Marc M.
    Black '95 PGT with mods 177.4 whp/159.6 wtq (probably way less now as the car has been partially de-modded)
    2000 BMW M-Roadster

  • #2
    With regards to ECU compatibility between the years. I've actually tested a few ECU's in different cars.

    I've tried a KL50 ECU ('94 MTX PGT) in my '95 MTX PGT (KL89) car. It will not start on the first few cranks of the starter. It also will have multiple CELs (02 ['NE2' crankshaft position sensor] and 04 ['NE1' camshaft/crankshaft position sensor]) IIRC. If you look at the pinouts in the post above, the '95's change the arragement of the pinouts for some key sensors. I'm actually surprised it worked at all since the ECU seems to be lacking all sensors regarding crank/camshaft positioning. I'll have to look at the pinouts more closely to see what signals the car is using to sequence ignition and injection patterns.

    I've also tried the same KL50 ECU ('94 MTX) in a '93 MTX PGT (KL07). It works perfectly. The only difference is that the '94 ECU lacks the programming and pinout of the extra coolant sensor found in the '93 cars. The good thing is that the '94 ECU doesn't care that it's not there since that coolant sensor was redundant anyway.

    I have not tried ATX ECU's in MTX cars and I don't know how they would react to the lack of the ATX sensors. I know that when doing an ATX-->MTX swap, some pins need to be jumped on the disconnected tranny harnesses. But, I don't have details.

    So basic rundown of MTX ECU's:
    -'95 ECU's will only work perfectly on '95 PGT's
    -'94 ECU's will work perfectly on '93 and '94 PGT's. They will sort of work on '95's with error as noted
    -'93 ECU's will work perfectly on '93 PGT's. They should also work perfectly on '94 PGT's but the cooling fan will always be on due to the lack of the extra coolant sensor. It should work with errors and with the cooling fan permanently on in '95 PGT's.

    Please add any more info you can.


    I'll keep a log of ECU part numbers:

    OBD-I:

    PGT ECU's:
    '93 MTX: KL07 (CA=KL07 18 881C)
    '94 MTX: KL48, KL50 (CA),
    '95 MTX: KL89, KL90 (CA) [dark gray connectors], I also found some evidence of early model '95's with ECU's labeled KL48-18881-C

    '93 ATX: KL07
    '94 ATX: KL48

    MX-6 ECU's:
    '93: KL01, KL03 (CA)
    '94: KL57 (CA MX6) [bright yellow connectors], also KL55 18 881B (Federal)
    '95: KL86, KL85 (no distinction between ATX and MTX, no consistency between A or B suffix)

    KLZE ECU's (must be used in combination with JE50 VAF):
    MTX=KL31
    ATX=KL36

    OBD-II

    '96 ATX=KLD1
    Last edited by Omaha95PGT; April 5, 2004, 12:46 PM.
    Marc M.
    Black '95 PGT with mods 177.4 whp/159.6 wtq (probably way less now as the car has been partially de-modded)
    2000 BMW M-Roadster

    Comment


    • #3
      Could you post the starting behavior of the '95 with the '94 ECU. I have suspected I might have bought a '94 ECU with the corksport chip, I swapped it at the same time I installed my ZE. I did try a '94 disty with no luck, I don't think I reset the ECU though. Also do the ECU's have different colored harnesses between years? I think I remember seeing one ECU with black plastic around the pins, and another with yellow.
      Bill's '95 PGT died 11/21/03
      Don't drink and drive

      Comment


      • #4
        Basically, I swapped in the '94 ECU. Turned the key to the starting position and it immediately the CEL light turned on. I pulled the codes as noted, and tried to start the car anyway. The car required 2-3 tries at which point it started and seemed to idle smoothly. I didn't drive it around tho' since the CELs were kind of unnerving.

        My KL89 ('95 ECU) has dark gray plastic surrounding the pins. The KL50 ('94 ECU) has bright yellow plastic surrounding the pins.
        Marc M.
        Black '95 PGT with mods 177.4 whp/159.6 wtq (probably way less now as the car has been partially de-modded)
        2000 BMW M-Roadster

        Comment


        • #5
          Let me run my scenerio by you again, to see if you have any new ideas. I know I already owe you a few beers, you can just start a tab. When I swapped my ZE in, I put in the corksport ZE ECU. The ECU has '94 GT MTX written on it, but I thought what the hell, they're both ODBI, it should work. After my install my car needs to turn over for about 5 seconds before it creates spark. So first thing I try is bending the harness pins for better contact, and reseting the ECU. I also tried cleaning the battery posts, and putting new terminal ends on. Neither of which worked. I then replaced the crank sensor with one from Napa, no luck. I then tried a '93 ECU, which caused my car not to start at all.
          My computer had to reboot itself, so I saved half way through
          I then tried another 1995 disty, same problem. Next I tried another crank sensor from Napa, same problem. Next I tried KL48C ECU (with black plastic around the pins), same problem. I put the ZE ECU back in. I then tried a '94 disty, resulting in a no start. Now what do you think?
          Bill's '95 PGT died 11/21/03
          Don't drink and drive

          Comment


          • #6
            Actually, if you look at the pinouts, you might be able to re-route some of the wires to the correct locations. I'm working on a guy's '93 PGT to make a '95 ECU work on it. (it's a custom burned '95 ECU to work with Millenia S injectors) We'll be cutting some wires on the harness inserting bullet connectors (so that it's reversible) and seeing what will happen.
            Marc M.
            Black '95 PGT with mods 177.4 whp/159.6 wtq (probably way less now as the car has been partially de-modded)
            2000 BMW M-Roadster

            Comment


            • #7
              Okay, I was having some issues with my PC restarting so I had to save half way through. Basically I believe I have the 94 ECU with a 95 disty, causing a hard start. BUT, when I tried a 93 and a 94 disty I got a no start. I AM SO CONFUSED! I might just have to drive to Illinois some weekend to figure this crap out. Let me know next time you guys are having a meet, and I'll try to round up some IPOCers to bring along.
              Bill's '95 PGT died 11/21/03
              Don't drink and drive

              Comment


              • #8
                Can anyone confirm if a KL90 is also for a 95 PGT MTX?
                Cobra Commander was robbed. He should have been our 44th president.
                http://www.somethingawful.com/articles.php?a=2463

                Comment


                • #9
                  Originally posted by EvilDave
                  Can anyone confirm if a KL90 is also for a 95 PGT MTX?
                  It probably is. Probably a variant (Cali ECU or maybe ATX). Plug it in see what happens. What car do you have?
                  Marc M.
                  Black '95 PGT with mods 177.4 whp/159.6 wtq (probably way less now as the car has been partially de-modded)
                  2000 BMW M-Roadster

                  Comment


                  • #10
                    Well KL90 is the original ECU for my 95 MTX. I'd been having some screwy problems and tried a KL89 from another 95 MTX at a junkyard. My PGT is a California car so I suppose that is the difference. Wasn't sure though. Doesn't run any differently (crappy) either way as best I can tell.
                    Cobra Commander was robbed. He should have been our 44th president.
                    http://www.somethingawful.com/articles.php?a=2463

                    Comment


                    • #11
                      Well, I'm going to buy a used '95 ECU, I suspect this will cure all my problems. If so I'll be selling my stock '94 ECU and my corksport ZE burn '94 ECU, so let me know if you're interested.
                      Bill's '95 PGT died 11/21/03
                      Don't drink and drive

                      Comment


                      • #12
                        Out of curiosity, what will happen if you cut wire 12 at the 16 pin connector, wire being the EGR sensor input? I was thinking of finding a way to get rid of code 16. With the wire being cut off and the ECU not getting a signal from the EGR what will be the output from it?
                        Rio Red 94PGT, Turbo T360trim,T3T4E 50 trim,T3T4E57 trim Parted out!
                        1998 Volvo S70, The Brick
                        1999 Red Volvo S70 T5 The Red Devil, modded
                        1998 Black V70R AWD, The Waggo with mods

                        Comment


                        • #13
                          Originally posted by RigsPGT
                          Out of curiosity, what will happen if you cut wire 12 at the 16 pin connector, wire being the EGR sensor input? I was thinking of finding a way to get rid of code 16. With the wire being cut off and the ECU not getting a signal from the EGR what will be the output from it?
                          Try it Just leave a good amount of wire so you can either solder it back together or use bullet connectors. I would think that a sensor that does not repond to command would cause the ECU to throw a CEL. But it's worth a try.
                          Marc M.
                          Black '95 PGT with mods 177.4 whp/159.6 wtq (probably way less now as the car has been partially de-modded)
                          2000 BMW M-Roadster

                          Comment


                          • #14
                            Does anyone know where the pin for the 2nd Coolant Temp Sensor in the '93 harness is? I'd like to make assumption that it's the #4 in the middle connector, simply because it's "not used" and it's right next to the CTS wire that is used.


                            I'd be curious to find out if I bridged that wire to that pin, could I make my cooling fans stop running in my '94 while running my KL31 ECU.




                            Hmmmmmmmmmmmmmmmm..............................
                            Greg Martin
                            2009 BMW 328i
                            2017 BMW X3
                            1990 Probe LX

                            Comment


                            • #15
                              Marc,

                              Add a KL07 ECU as for a 93 ATX in the list. I had junked my other GT and saved the ECU and yes its a KL07 that ran on an ATX.
                              Rio Red 94PGT, Turbo T360trim,T3T4E 50 trim,T3T4E57 trim Parted out!
                              1998 Volvo S70, The Brick
                              1999 Red Volvo S70 T5 The Red Devil, modded
                              1998 Black V70R AWD, The Waggo with mods

                              Comment

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