Guest Anonymous Posted March 17, 2003 Share Posted March 17, 2003 Somehow the wiring delete thread got swallowed up by the forum..?! Anyway, I have the info archived since it is pretty important to anyone doing a late LT1 swap, so here it is: --------------------------------------------------------------------------------- Hey LT1 guys. I think I have gotten my wiring for the PCM figured. Can anyone confirm that the input/ouput wires that I have determined are unnecessary, can actually be deleted. I just to make sure that I'm on the right track. It is from a 94 Z28 with T56. Here goes (these are the wires that I think are unnecessary): RED Connector : 7,9,10,11,12,14,15,23,25,31,32 BLACK Connector : 1,7,8,12,13,21 (28, 29 I can't figure out what they do?) CLEAR Connector : 11,13,15,16,28,29,30 BLUE Connector : 2,6,8,11,12,15,24,20,28 These numbers are PCM plug numbers. Thanks, Tim -------------------------------------------------------------------------------- here's the wires you do need. On your Black PCM connector you need to add constant battery power to pin outs 15 and 31. They should be orange wires. Ignition power (switched 12V) will be on the same black connector in pin out 30, should be a pink wire. For the Red connector you will need to add grounds for pin 2, which is Black with white tracer. Also ground pin 18, this is Tan with white tracer. Also ground pin 31. For the clear connector just ground pin 32, Black with white tracer. For the blue connector ground pin 1, Tan with white tracer. Pin 3 needs switched 12V power, it's pink in color. this is from Terry over at TPIS. he got is for me from one of their universal street rod harnesses. he also said: Just add power where it needs it and grounds where they need it. Plug everything in and it will fire. Also make sure your switched 12V power leads have 12Volts while cranking not just in key on position. hope this helps, super280z --------------------------------------------------------------------------------- Red 31 VSS ground and 32 VSS sig will help drivability. Black 28 and 29 are 5V reference voltages sent to your sensors you need them. Blue 20 service enable is part of the ALDL link and you need it to reprogram your computer.If your not using a charcoal canister you dont need Blue 10. I'm keeping red 7,10,11 black 8 and blue 6 on my car but you dont need them. - Tim240Z --------------------------------------------------------------------------------- Thanks for the info, I am working on a 95 lt1/4l60 in a 72 240z. I was going to spend the $$ and buy the wiring, but I am going to do it now. Is the wiring the same for the Corvette computer? Any web sites that mite help. Mike(mas280) --------------------------------------------------------------------------------- Looking at Tunercat.com I find that there are two seperate PCMs, I think RevB was a late 95 thing? 16181333 or 16188051 94 - 95 Y, F & B CAR 5.7L, LT1 (FLASH) (incl. 'Rev B') My 94 Camaro has 8051, I dont know for sure what the 1333 is, maybe thats the Vette. If you need a for sure answer, http://www.lt1edit.com/ is a good place to ask, as best I seem to recall though that LT1 Edit would not work with the LT1 Vettes because of the master computer issue, but I could be wrong, I appologize for my poor memory. -Mudge --------------------------------------------------------------------------------- Is there any one else that knows if the Lt1 edit will work with the 94-95 Vettes computer. I only got the main computer with my swap. Thanks Mike (mas280) --------------------------------------------------------------------------------- Go to this site for a further explanation of the different PCM's used. http://www.fuelinjection.com/portinj.html Powertrain Control Module (PCM) The PCM is a programmable computer and does not contain a EPROM or calibrator as did its predecessor. The PCM contains a Electronically Eraseable Programmable Read Only Memory (EEPROM). This unit must be programed before being placed in service. These Units can be re- programed for any engine / transmission combination. All of these units are Sequential Port Fuel Injection (SEFI). PCM Model Year GMpartNo Engine BF 1994-1995 16188051 5.7L LT1 Y 1994-1995 16181333 5.7L LT1/LT4 F,Y 1996 16214399 5.7L LT1 F 1997 16242921 5.7L LT1 F,Y 1997-1998 16238212 5.7L LS1 The Y model is your vette and 16181333 is the PCM# With the correct cable you "should" be able to program the unit just like the Camaro (F) body PCM (16188051) that I have. I also found this poking around: "The 1333 is the corvette variant. It is actually a 16188051 with an extra chip to run the OBD-II bus for a link to the corvette Central control module. It can be reprogrammed for the F and B body's." In addition, write to Andrew at AKM as he can most likely answer all your questions on programming the PCM and the different flavors that GM used. andrew@akmcables.com Danno74Z --------------------------------------------------------------------------------- Hope that helps. Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted March 18, 2003 Share Posted March 18, 2003 The PCM (Computer) on the 95 LT1 engine part # 16188051 has four 32-pin connectors - Red, Black, Grey (Clear), and Blue. Below is a description of use, the wire color used by GM and pin locations. Not all of the pins “cavities†are used on each connector ("OMIT" by GM) and not all are needed to run the LT1 engine in a Datsun. Super280z and Tim240Z indicated the pinouts they are using to operate their engines and I can only assume all is fine with their advise. I have not gotten to this point yet in my conversion but gathering data at this point. Danno74Z RED CONNECTOR PIN # WIRE COLOR,,CKT,,,,,,,,,,,,,DESCRIPTION 2,,,,,,,,,blk/wht,,,,,,,,,,,,,,,,451,,,,,,,,,,,,,PCM Ground 3,,,,,,,,,blk,,,,,,,,,,,,,,,,,,,,,,1744,,,,,,,,,,,,Fuel Injector #1 Control 4,,,,,,,,,lt blue/blk,,,,,,,,,,,844,,,,,,,,,,,,,,Fuel Injector #4 Control 5,,,,,,,,,yel/blk,,,,,,,,,,,,,,,,846,,,,,,,,,,,,,,Fuel Injector #6 Control 6,,,,,,,,,red/blk,,,,,,,,,,,,,,,,877,,,,,,,,,,,,,,Fuel Injector #7 Control 7,,,,,,,,,dk grn/wht, ,,,,,,,,465,,,,,,,,,,,,,,Fuel Pump Relay Control 8,OMIT 9,,,,,,,,,gry,,,,,,,,,,,,,,,,,,,,,,435,,,,,,,,,,,,,,EGR Vacuum Control Signal Solenoid Valve Control 10,,,,,,,,dk blu,,,,,,,,,,,,,,,,473,,,,,,,,,,,,,,Coolant Fan Relay #2 and #3 Control 11,,,,,,,,dk grn,,,,,,,,,,,,,,,,335,,,,,,,,,,,,,,Coolant Fan Relay #1 Control 12,,,,,,,,tan/blk,,,,,,,,,,,,,,,464,,,,,,,,,,,,,,EBTCM TP Sensor Signal 13,,,,,,,,wht,,,,,,,,,,,,,,,,,,,,121,,,,,,,,,,,,,,Tach Output 14,,,,,,,,brn,,,,,,,,,,,,,,,,,,,,436,,,,,,,,,,,,,,,Air Pump Relay Control 15,,,,,,,,dk blu,,,,,,,,,,,,,,,1493,,,,,,,,,,,,,Performance Indicator Control 16,OMIT 17,OMIT 18,,,,,,,,,tan/wht,,,,,,,,,,,,,,551,,,,,,,,,,,,,PCM Ground 19,,,,,,,,,lt grn/blk,,,,,,,,,,,1745,,,,,,,,,,,Fuel Injector #2 Control 20,,,,,,,,,blk/wht ,,,,,,,,,,,,,845,,,,,,,,,,,,Fuel Injector #5 Control 21,,,,,,,,,pnk/blk,,,,,,,,,,,,,,1746,,,,,,,,,,Fuel Injector #3 Control 22,,,,,,,,,dk blu/wht,,,,,,,,,878,,,,,,,,,,,,Fuel Injector #8 Control 23 ,,,,,,,,orn/blk,,,,,,,,,,,,,,,463,,,,,,,,,,,,Traction Control System Spark Retard Request 24,OMIT 25,,,,,,,,,dk blu,,,,,,,,,,,,,,,,229,,,,,,,,,,,,Fuel Enable Signal 26-30,OMIT 31,,,,,,,,ppl,,,,,,,,,,,,,,,,,,,,,,,401,,,,,,,,,,,VSS Ground 32,,,,,,,,yel,,,,,,,,,,,,,,,,,,,,,,,400,,,,,,,,,,,VSS Signal BLACK CONNECTOR PIN # WIRE COLOR,,CKT,,,,,,,,,,,,,DESCRIPTION 1,,,,,,,,,dk grn/wht ,,,,,,,,,,762,,,,,,,,,,,,,,A/C Request 2,,,,,,,,,red/blk,,,,,,,,,,,,,,,,,453,,,,,,,,,,,,,,Low Resolution Siginal 3,,,,,,,,,pnk/blk,,,,,,,,,,,,,,,,632,,,,,,,,,,,,,,Distributor Ref. Low Signal 4,OMIT 5,,,,,,,,,wht,,,,,,,,, ,,,,,,,,,,,,423,,,,,,,,,,,,,,Ignition Control(IC) 6,,,,,,,,,blk,,,,,,,,, ,,,,,,,,,,,,,470,,,,,,,,,,,,,,TP Sensor, ECT Ground Reference 7,,,,,,,,,lt grn,,,,,,,,, ,,,,,,,,,1222,,,,,,,,,,,,1-2 Shift Solenoid Control 8,,,,,,,,,dk grn/wht,,,,,,,,,,817,,,,,,,,, ,,,,VSS Output (4000PPM) 9-11,OMIT 12,,,,,,,yel/blk,,,,,,,,, ,,,,,,1223,,,,,,,,,,,,2-3 Shift Solenoid Control 13,,,,,,,gry,wht,,,,,,,,,,,,,,,587,687,,,,,,,Skip Shift Sol. Control, 3-2 Shift Sol. Ctrol. 14,,,,,,,red,,,,,,,,,,,,,,,,,,,,,,631,,,,,,,,,,,,,,Distributor Ignition Feed 15,,,,,,,orn,,,,,,,,,,,,,,,,,,,,,340,,,,,,,,,,,,,,,Battery Feed 16,,,,,,,blk,,,,,,,,,,,,,,,,,,,,,452,,,,,,,,,,,,,,,IAT,MAP,A/C Refrig, A/C Evap Temp. Ground Ref. 17-18, OMIT 19,,,,,,,yel,,,,,,,,,,,,,,,,,,,,,492,,,,,,,,,,,,,,,,MAF Signal 20,,,,,,,ppl/wht,,,,,,,,,,,,,,430,,,,,,,,,,,,,,,,High Resolution Signal 21,,,,,,,dk grn,,,,,,,,,,,,,,,,59,,,,,,,,,,,,,,,,,,A/C Clutch Status 22-27,OMIT 28,,,,,,,gry,,,,,,,,,,,,,,,,,,,,,474,,,,,,,,,,,,,,,,,+5 Volts Reference 29,,,,,,,gry,,,,,,,,,,,,,,,,,,,,,416,,,,,,,,,,,,,,,,,+5 Volts Reference 30,,,,,,,pnk,,,,,,,,,,,,,,,,,,,,439,,,,,,,,,,,,,,,,,Ignition Feed 31,,,,,,,orn,,,,,,,,,,,,,,,,,,,,340,,,,,,,,,,,,,,,,,Battery Feed 32,OMIT GREY/CLR CONNECTOR PIN # WIRE COLOR,,CKT,,,,,,,,,,,,,DESCRIPTION 1,,,,,,,,,lt blu/wht,,,,,,,,,,,1747,,,,,,,,,,,,,IAC Coil “A†High 2,,,,,,,,,lt blu/blk,,,,,,,,,,,,1748,,,,,,,,,,,,,IAC Coil “A†Low 3,4,OMIT 5,,,,,,,,,lt grn/blk,,,,,,,,,,,,444,,,,,,,,,,,,,,,IAC Coil “B†Low 6,,,,,,,,,lt grn/wht,,,,,,,,,,1749,,,,,,,,,,,,,,IAC Coil “B†High 7,,,,,,,,,tan,,,,,,,,,,,,,,,,,,,,,1667,,,,,,,,,,,,,,Bank #2 HO2S Low 8,,,,,,,,,ppl,,,,,,,,,,,,,,,,,,,,,1666,,,,,,,,,,,,,,Bank #2 HO2S High 9-10, OMIT 11,,,,,,,lt blu,,,,,,,,,,,,,,,,,,832,,,,,,,,,,,,,,,,Traction Control System Active 12, OMIT 13,,,,,,,lt blu,,,,,,,,,,,,,,,,,,553,,,,,,,,,,,,,,,,Performance Mode Input 14,,,,,,,lt blu/blk,,,,,,,,,,,,583,,,,,,,,,,,,,,,,Brake Signal 15,,,,,,,orn/blk,,,,,,,,,,,,,,,434,,,,,,,,,,,,,,,,PNP Signal 16,,,,,,,red/blk,,,,,,,,,,,,,,,1228,,,,,,,,,,,,,,Pressure Control Solenoid 17-18,OMIT 19,,,,,,,tan/wht,,,,,,,,,,,,,,1653,,,,,,,,,,,,,,,Bank #1 HO2S Low 20,,,,,,,ppl/wht,,,,,,,,,,,,,,1665,,,,,,,,,,,,,,,Bank #1 HO2S High 21,,,,,,,tan,,,,,,,,,,,,,,,,,,,,,472,,,,,,,,,,,,,,,,,IAT Signal 22,,,,,,,dk blu,,,,,,,,,,,,,,,,417,,,,,,,,,,,,,,,,,TP Sensor Signal 23,,,,,,,lt grn,,,,,,,,,,,,,,,,,,432,,,,,,,,,,,,,,,,,MAP Signal 24,OMIT 25,,,,,,,yel,,,,,,,,,,,,,,,,,,,,,,410,,,,,,,,,,,,,,,,,ECT Signal 26-27,OMIT 28,,,,,,,pnk,,,,,,,,,,,,,,,,,,,,,1224,,,,,,,,,,,,,,,Range Signal “A†29,,,,,,,dk blu,,,,,,,,,,,,,,,,,1225,,,,,,,,,,,,,,,Range Signal “B†30,,,,,,,red,,,,,,,,,,,,,,,,,,,,,,1226,,,,,,,,,,,,,,,Range Signal “C†31,OMIT 32,,,,,,,blk/wht,,,,,,,,,,,,,,,451,,,,,,,,,,,,,,,,,PCM Ground BLUE CONNECTOR PIN # WIRE COLOR,,CKT,,,,,,,,,,,,,DESCRIPTION 1,,,,,,,,,tan/wht,,,,,,,,,,,,,,,551,,,,,,,,,,,,,,,PCM Ground 2,,,,,,,,,lt blu/wht,,,,,,,,,,,1229,,,,,,,,,,,,,,Pressure Control Solenoid Low 3,,,,,,,,,pnk,,,,,,,,,,,,,,,,,,,,,439,,,,,,,,,,,,,,,Ignition Feed 4-5,OMIT 6,,,,,,,,,lt grn, brn,,,,,,,,,,,1652,418,,,,,,Rev. Lockout Solenoid Contr., TCC PWN Sole. Cont. 7,OMIT8,,,,,,,,,dk grn/wht,,,,,,,,,459,,,,,,,,,,,,,,,,A/C Clutch Relay Control 9,,,,,,,,,brn/wht,,,,,,,,,,,,,,419,,,,,,,,,,,,,,,,MIL (Service Engine Lignt) Indicator Control 10,,,,,,,dk grn/wht,,,,,,,,,428,,,,,,,,,,,,,,,,EVAP Canister Purge Solenoid Valve Control 11,,,,,,,tan,,,,,,,,,,,,,,,,,,,,,422,,,,,,,,,,,,,,,,TCC Solenoid Control 12,,,,,,,red/blk,,,,,,,,,,,,,,380,,,,,,,,,,,,,,,,,A/C Refrigerant Pressure Sensor Signal 13-14,OMIT 15,,,,,,,wht,,,,,,,,,,,,,,,,,,,,375,,,,,,,,,,,,,,,,,Skip Shift Indicator Control 16-19,OMIT 20,,,,,,,wht/blk,,,,,,,,,,,,,,448,,,,,,,,,,,,,,,,,,Output/Field Service Enable Terminal 21,OMIT 22,,,,,,,dk blu,,,,,,,,,,,,,,,,496,,,,,,,,,,,,,,,,,,Knock Sensor Signal 23,OMIT 24,,,,,,,dk blue,,,,,,,,,,,,,,732,,,,,,,,,,,,,,,,,,A/C Temperature Sensor Signal 25-27,OMIT 28,,,,,,,yel/blk,,,,,,,,,,,,,,,1227,,,,,,,,,,,,,,,,Transmission Fluid Temp. Sensor Signal 29,OMIT 30,,,,,,,tan,,,,,,,,,,,,,,,,,,,,,,800,,,,,,,,,,,,,,,,,,Serial Data 31-32,OMIT Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted March 18, 2003 Share Posted March 18, 2003 Just an FYI, here is a scan of the repair manual pages for the PCM wiring... 95 camaro wiring Hopefully I'm not violating any copyrights, but if I am, I will certainly take them down. Quote Link to comment Share on other sites More sharing options...
mas28O Posted March 18, 2003 Share Posted March 18, 2003 does anyone have any info on what wires that they took out? Mike Quote Link to comment Share on other sites More sharing options...
flibuoy Posted April 1, 2003 Share Posted April 1, 2003 thanks to tim240z, dewzenol(?) and others I may have missed, the posts on wire deletes have been informative AND useable. I am a weenie, have my 94 5 speed TA 051 and harness out,stripped and marked and side cutters at ready....has anyone actually tested the wire delete suggestions? They look right and I have looked at several times. Is blue 21 the one that idles up when A/C clutch is engaged? Or which? I think this is a good feature IF it can stand alone since remainder of system will be installed after engine is done. Any suggestions from others on wire selection? My early 260Z is alris already wired per JTR so alternator, fuel pump and air should stand alone. I am not using air pump, evap cannister or egr. Where someone said "constant" battery power this meant always hot 12V ? Feel free to email me directly if you have response that grup will not benefit from....thanks....like I said I am weenie...last chev if carb was wet then it was bad spark and if shocked at plug then problem was fuel. john Quote Link to comment Share on other sites More sharing options...
Tim240z Posted April 1, 2003 Share Posted April 1, 2003 Yes I have tested it. There are 4 wires that have ign. hot, and one that has constant hot. Apart from starter juice, and gauges, that will start the car. Tim Quote Link to comment Share on other sites More sharing options...
Danno74Z Posted April 1, 2003 Share Posted April 1, 2003 Tim, FYI - One must also delete VATS (vehicle anti-theft system) from the PCM (or know the key resistor value) before the engine will run for longer then about 30 seconds. I've read it's about a 30 second run duration, but I don't have first hand experience on this. Danno74Z Quote Link to comment Share on other sites More sharing options...
Tim240z Posted April 2, 2003 Share Posted April 2, 2003 Tim' date=' FYI - One must also delete VATS (vehicle anti-theft system) from the PCM (or know the key resistor value) before the engine will run for longer then about 30 seconds. I've read it's about a 30 second run duration, but I don't have first hand experience on this. Danno74Z[/quote'] Dan, That was a wierd thing with mine, it started and ran fine before I even had my TunerCat software. Tim Quote Link to comment Share on other sites More sharing options...
flibuoy Posted April 2, 2003 Share Posted April 2, 2003 makes sense to me that car ran in spite of VATS not bypassed since it diables fuel pump I believe and if car is wired per jtr then fuel pump is independent of PCM. I am warm if not hot with this answer? john Quote Link to comment Share on other sites More sharing options...
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