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LS1 ECU Pin outs

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LS1 ECU Pin outs

Post  Admin on Tue Jul 21, 2009 4:11 pm

Does anyone have a list of pin outs that show what the computer is suppose to see? I have the pin out for location. I just tried to fire up Kent's car and I get no ignition. I think. I have fuel. Just no fire.
Help! Shocked

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Re: LS1 ECU Pin outs

Post  Tetzuoe on Tue Jul 21, 2009 4:27 pm

oy, what year is it, Ill post up my pinout info in a sec (gotta go find it)

ah crap, ls1tech is down due to site maitenence, my starting point would be here: [You must be registered and logged in to see this link.]
then Id look for pinout info, theres a post that has all the pinouts in PDF for each year ls.
maybe just try googling the car the PCM came from, with the year its important if its pre or post 99 after that I think theres just subtle differences in the ecu pins.
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Re: LS1 ECU Pin outs

Post  gt1scca on Tue Jul 21, 2009 6:45 pm

2000 [CORVETTE] LSX PCM PINOUTS

PCM Connector C1 Assembly 12191489 / TPA (BLU) 12176408 / Connector Cover 12191108

Pin Wire Color Circuit No. Function

1 BLK/WHT 451 PCM Ground
2 LT GRN 1867 Crankshaft Position Sensor B+ Supply
3 PNK/BLK 1746 Injector 3 Control
4 LT GRN/BLK 1745 Injector 2 Control
5-6 -- -- Not Used
7 GRY 596 Engine Oil Pressure Sensor 5V Reference
8-10 -- -- Not Used
11 LT BLU 1876 Knock Sensor Signal Rear
12 DK BLU/WHT1869 Crankshaft Position Sensor Signal
13 ORN/BLK 463 Requested Torque Signal
14 TAN 800 Throttle Actuator Control Serial Data
15 ORN/BLK 1061 Throttle Actuator Control Serial Data
16 -- -- Not Used
17 DK BLU 1225 Transmission Range Signal B (Automatic Transmission Only)
18 RED 1226 Transmission Range Signal C (Automatic Transmission Only)
19 PNK 239 PCM Ignition Supply
20 ORN 340 PCM Battery Supply
21 YEL/BLK 1868 Crankshaft Position Sensor Ground
22 -- -- Not Used
23 GRY 720 Sensor Ground
24 -- -- Not Used
25 TAN 1671 HO2S Signal Low Bank 2 Sensor 2
26 TAN 1667 HO2S Signal Low Bank 2 Sensor 1
27 -- -- Not Used
28 TAN/WHT 1669 HO2S Signal Low Bank 1 Sensor 2
29 TAN/WHT 1653 HO2S Signal Low Bank 1 Sensor 1
30-31 -- -- Not Used
32 BLK/WHT 771 PRND A Input Signal (Automatic Transmission Only)
33 PPL 420 TCC Brake Switch (Automatic Transmission Only)
34 WHT 776 PRND P Input Signal (Automatic Transmission Only)
35 GRY 48 Clutch Switch (Manual Transmission Only)
36 BLK 1744 Injector 1 Control
37 YEL/BLK 846 Injector 6 Control
38 PNK/WHT 1101 Powertrain Induced Chassis Pitch Signal (if so equipped)
39 -- -- Not Used
40 BLK/WHT 451 PCM Ground
41 -- -- Not Used
42 DK GRN 335 Engine Cooling Fan Relay 1 Control
43 RED/BLK 877 Injector 7 Control
44 LT BLU/BLK 844 Injector 4 Control
45 GRY 474 A/C Refrigerant Pressure Sensor 5V Reference
46 GRY 598 Fuel Tank Pressure Sensor 5V Reference
47 -- -- Not Used
48 GRY 416 MAP Sensor 5V Reference
49-50 -- -- Not Used
51 DK BLU 496 Knock Sensor Signal Front
52 -- -- Not Used
53 ORN/BLK 1057 Transmission Temperature Sensor Ground
54 ORN/BLK 469 MAP Sensor Ground
55-56 -- -- Not Used
57 ORN 340 PCM Battery Supply
58 DK GRN 1049 Serial Data
59 -- -- Not Used
60 BLK 407 A/C Refrigerant Pressure Sensor Ground
61 PNK/BLK 632 Camshaft Position Sensor Ground
62 GRY 847 Extended Travel Brake Switch Signal
63 BLK 452 Engine Oil Pressure Sensor Ground
64 -- -- Not Used
65 PPL 1670 HO2S Signal High Bank 2 Sensor 2
66 PPL 1666 HO2S Signal High Bank 2 Sensor 1
67 -- -- Not Used
68 PPL/WHT 1668 HO2S Signal High Bank 1 Sensor 2
69 PPL/WHT 1665 HO2S Signal High Bank 1 Sensor 1
70 BRN 1174 Low Oil Level Switch
71 -- -- Not Used
72 YEL 772 PRND B Input Signal (Automatic Transmission Only)
73 BRN/WHT 633 Camshaft Position (CMP) Sensor Signal
74 YEL 410 Engine Coolant Temperature (ECT) Sensor Signal
75 -- -- Not Used
76 BLK/WHT 845 Injector 5 Control
77 DK BLU/WHT 878 Injector 8 Control
78 -- -- Not Used
79 GRY or WHT 587 or 687 2nd and 3rd Gear Block Out Solenoid Control (M/T) or 3-2 Shift Solenoid Control (A/T)
80 BRN 718 Engine Coolant Temperature (ECT) Sensor Ground

PCM Connector C2 Assembly 12191488 / TPA (RED) 12176410 / Connector Cover 12191108

Pin Wire Color Circuit No. Function

1 BLK/WHT 451 PCM Ground (Automatic Transmission Only)
2 BRN 418 TCC Control Solenoid (Automatic Transmission Only)
3 -- -- Not Used
4 PPL 421 AIR Solenoid Control
5 TAN/BLK 464 Torque Delivered
6 RED/BLK 1228 Transmission Fluid Pressure Control Solenoid High (Automatic Transmission Only)
7 -- -- Not Used
8 LT BLU/WHT 1229 Transmission Fluid Pressure Control Solenoid Low (Automatic Transmission Only)
9 DK GRN/WHT465 Fuel Pump Relay Control
10 WHT 121 Engine Speed (Tach) Output Signal
11-13 -- -- Not Used
14 RED/BLK 380 A/C Refrigerant Pressure Sensor Signal
15 RED 225 Alternator L Terminal
16 -- -- Not Used
17 DK GRN/WHT762 A/C Request Signal (C60 only)
18 DK GRN 59 A/C Status Signal
19 -- -- Not Used
20 PPL 401 Vehicle Speed Sensor (VSS) Reference Low
21 YEL 400 Vehicle Speed Sensor (VSS) Signal
22-24 -- -- Not Used
25 TAN 472 IAT Sensor Signal
26 PPL 2121 Ignition Control 1
27 RED 2127 Ignition Control 7
28 LT BLU/WHT 2126 Ignition Control 6
29 DK GRN/WHT 2124 Ignition Control 4
30 -- -- Not Used
31 YEL 492 MAF Sensor Signal
32 LT GRN 432 MAP Sensor Signal
33 DK BLU 473 Engine Cooling Fan Relay 2 and 3 Control
34 DK GRN/WHT 428 EVAP Canister Purge Valve Control
35 -- -- Not Used
36 BRN 436 AIR Pump Relay Control
37-38 -- -- Not Used
39 RED 631 Camshaft Position Sensor B+ Supply
40 BLK/WHT 451 PCM Ground
41 -- -- Not Used
42 TAN/BLK 422 TCC Enable Circuit (Automatic Transmission Only)
43 DK GRN/WHT 459 A/C Clutch Relay Control
44 LT GRN 1652 Reverse Inhibit Solenoid Control
45 WHT 1310 EVAP Canister Vent Valve Control
46 BRN/WHT 419 Malfunction Indicator Lamp (MIL) Control
47 WHT or YEL/BLK 375 or 1223 1 to 4 Up-shift Lamp Control or Transmission Shift Solenoid B
48 LT GRN 1222 Transmission Shift Solenoid A
49 -- -- Not Used
50 DK GRN/WHT 817 Vehicle Speed Output Circuit
51 YEL/BLK 1227 Transmission Temperature Sensor Signal
52 GRY 23 Alternator F Terminal
53 -- -- Not Used
54 DK BLU 1936 Fuel Level Sensor Signal
55-56 -- -- Not Used
57 PPL 719 IAT Sensor Ground
58 TAN/WHT 331 Engine Oil Pressure Sensor Signal
59 -- -- Not Used
60 BRN 2129 Ignition Control Reference Low Bank 1
61 BRN/WHT 2130 Ignition Control Reference Low Bank 2
62 GRY 773 PRND C Input Signal (Automatic Transmission Only)
63 PNK 1224 Transmission Range Signal A (Automatic Transmission Only)
64 DK GRN 890 Fuel Tank Pressure Sensor Signal
65 -- -- Not Used
66 PPL/WHT 2128 Ignition Control 8
67 RED/WHT 2122 Ignition Control 2
68 DK GRN 2125 Ignition Control 5
69 LT BLU 2123 Ignition Control 3
70-72 -- -- Not Used
73 LT BLU 1937 Fuel Level Sensor Signal (Secondary)
74-80 -- -- Not Used

Cooling Fans:

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Re: LS1 ECU Pin outs

Post  Admin on Tue Jul 21, 2009 7:11 pm

You already sent me that info, I need to know what the computer needs to see, Such as ground or 5 volt ref. Things like that. Hell' I wouldn't gotten this far without your other info.... Very Happy

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Re: LS1 ECU Pin outs

Post  gt1scca on Tue Jul 21, 2009 8:19 pm

Admin wrote:...I need to know what the computer needs to see, Such as ground or 5 volt ref. Things like that....
[from LS1TECH.com...]

This is based on the diagrams from LS7power.com, I think that the wiring is the same for all 99-02 f-bodies at least as far as the c220, 230, 100,101, and 105 connectors. Anyway this is how I would wire the motor in (this does not include wiring for traction control, cruise, or A/C.)

Connector C100

A. This is the power for the odd fuel injectors, route it to IGN 1 15A fuse
B. Not needed
C. Not needed
D. Not needed
E. Not needed
F. Not used
G. Engine control power, route to IGN 3 15A fuse
H. Cooling fan #2 / high speed relay, route to terminal 86 of cooling fan #2 relay
J. Cooling fan #1 / low speed relay, route to terminal 86 of cooling fan #1 relay
K. Not needed

Connector C101

A. Not needed
B. Power for even coils, route to IGN 2 15A fuse
C. Not needed
D. Output for fuel pump relay, route to terminal 85 of fuel pump relay
E. Computer power, route to IGN 4 15A fuse
F. Not used
G. Constant computer power, route to BAT 1 10A fuse
H. Ground this wire
J. Not used
K. Not needed

Connector C105


A. Not needed
B. Engine sensor power, route to IGN 5 20A fuse
C. Not needed
D. Not needed
E. Not needed
F. Not needed
G. Tachometer output (this is a 4 cylinder, two pulse per revolution output)
H. Not needed on 1999, note on a 2002 harness connector info sheet that I have it says that this pin is for the EGR valve, but I do not have any diagrams for on 02 so I cannot confirm this and have no idea what to hook it to on an 02.

Connector C220

A. Oil pressure output, if you are going to try using the LS1 oil pressure sender with your gauge then connect this wire to your oil pressure gauge. I just put the stock sender from my original motor in, and abandoned this wire.
B. Not used on an automatic, to Clutch pedal position switch on a 6spd.
C. Power supply to TCC stop lamp switch, not used in 6SPD or if your car already has a TCC stop switch. If your car does not have a stop lamp switch then use this to feed power to feed the switch.
D. To brake torque converter clutch switch. You need a switch that provides +12V power to this wire when the car is running and then cuts power when you press the brake pedal. You may have a cruise control switch that does this already there or you may have to add a switch. If you need a switch you can use a microswitch from radioshack, just make a bracket to hold the switch behind the arm of the brake pedal so that when the pedal is at rest the switch is depressed and when you push the brake pedal down the switch opens and loses contact. If you need to add a switch you can get the power from pin C of connector 220. This switch is not needed in a 6SPD conversion.
E. Ground this wire
F. Not used
G. Not used in an auto, reverse light switch in a 6SPD
H. AUTO: Park neutral position switch, You need a switch that will ground out this wire when the car is in park or neutral. There may already be a switch on the shifter for this or you may have to add one. Same as above you can use a microswitch, except that for this switch you wire it to a ground, not a power source. 6SPD is used for the reverse light switch.
J. Not needed
K. Vehicle speed sensor output from computer, this is a 4000 pulse per mile square wave output, it will work for GM speedometers and some aftermarket speedos, other aftermarket speedos need a direct signal from the VSS

Connector C 230

A. Not needed
B. To service engine soon light, (- output) Hook this to one side of a 12V light bulb and hook the other side of the bulb to an ignition hot fuse (IE: the fuse that used to provide power to your coil, or better yet to the IGN 5 20A fuse)
C. Not used
D. Not needed
E. VATS fuel enable, not needed if you delete the VATS in the computer, or you could keep it and run a VATS bypass box if you want the extra security.
F. Not needed
G. Not needed
H. Not needed
J. Not needed.
K. Serial data output to DLC connector terminal #2

Relays, This is based on the use of 30A bosch style automotive relays, relays # 1,2, and 3 could be combined into 1 relay if you could find one with a 80A rating.

Relay 1

Terminal 85 to conversion car wiring (a wire that is hot in run and start modes), I would use the wire that powered the original coil (remove the ballast resistor if it was a pre HEI car)
Terminal 86 To ground
Terminal 30 Direct to battery voltage
Terminal 87 to 2 15A fuses(IGN 1 and IGN 2) IGN 1 fuse to pin A of C100 connector, and IGN 2 fuse to pin B of C101 connector.

Relay 2

Terminal 85 to conversion car wiring (a wire that is hot in run and start modes), I would use the wire that powered the original coil (remove the ballast resistor if it was a pre HEI car)
Terminal 86 To ground
Terminal 30 Direct to battery voltage
Terminal 87 to 2 15A fuses(IGN 3 and IGN 4) IGN 3 fuse to pin G of C100 connector, and IGN 4 fuse to pin E of C101 connector.

Relay 3

Terminal 85 to conversion car wiring (a wire that is hot in run and start modes), I would use the wire that powered the original coil (remove the ballast resistor if it was a pre HEI car)
Terminal 86 To ground
Terminal 30 Direct to battery voltage
Terminal 87 to 1 20A fuse(IGN 5), IGN 5 to pin B of connector C105

Relay 4 fuel pump relay

Terminal 85 to pin D of connector C101
Terminal 86 To ground
Terminal 30 Direct to battery voltage
Terminal 87 to 1 20A fuse then to the fuel pump.
The cooling fans can use two relays or one, it looked like you had two fans so you could hook them up separately and have one fan kick on normally and then have the second fan kick on only if the engine keeps getting warmer. Or you could hook both fans to fan relay #1 (if they take less than 30A combined or if you get a 40A relay) and have them both turn on at the same time and just ignore the wiring for fan relay #2.

Relay 5 cooling fan #1 / slow speed fan

Terminal 85 to conversion car wiring (a wire that is hot in run and start modes), I would use the wire that powered the original coil (remove the ballast resistor)
Terminal 86 To pin J of connector C100
Terminal 30 Direct to battery voltage
Terminal 87 to a 20A fuse or larger, depends on your cooling fan requirements.

Relay 6
cooling fan #2 / high speed fan

Terminal 85 to conversion car wiring (a wire that is hot in run and start modes), I would use the wire that powered the original coil (remove the ballast resistor)
Terminal 86 To pin H of C100 connector
Terminal 30 Direct to battery voltage
Terminal 87 to a 20A fuse or larger, depends on your cooling fan requirements

The only other wiring to hook up should be the starter wire, I would take the wire that used to connect to the conversion cars starter solenoid (should be purple if it’s a GM) and connect it directly to the starter solenoid on the LS1 starter.

Also the DLC link in the car, the power wire for that needs to go to a battery constant fuse, you can either wire it to the stock lighter fuse in the conversion vehicle (preferred) or connect it to the BAT 1 fuse that supplies power to the computer. And you need both ground wires in the DLC connector.


Are we close yet?

Razz
.

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Re: LS1 ECU Pin outs

Post  Admin on Tue Jul 21, 2009 8:30 pm

That's great,
Embarassed

Don't be to pissed, But I tested everything and found that I had it all right. Now I have to deal with stuck injectors.
Anyone Have an idea how to fix this at home?

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Re: LS1 ECU Pin outs

Post  msmoorenburg on Wed Jul 22, 2009 8:24 am

Admin wrote:That's great,
Embarassed

Don't be to pissed, But I tested everything and found that I had it all right. Now I have to deal with stuck injectors.
Anyone Have an idea how to fix this at home?


I unstuck a caravan injectors with a 9v battery just do it quickly and stop when you hear the injector click. And if they are stubborn use the dewalt 18v Shocked that worked on the nissan that sat for 10 years
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Re: LS1 ECU Pin outs

Post  Admin on Wed Jul 22, 2009 11:31 am

Cool, I'll give it a try.

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