2.4 ECU Pinout sheet, anyone?
#1
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2.4 ECU Pinout sheet, anyone?
Does anyone have a list of the pinouts for the 2006 2.4 ECU connector? We need it to work up a tune with the piggy-back computer for turbocharging (it needs to tie in to specific signals in the existing ECU).
I'm sure one of the GM manuals for the 2.4 has this, but I don't have access to a GM mechanic these days.
I'm sure one of the GM manuals for the 2.4 has this, but I don't have access to a GM mechanic these days.
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Same with fuel - since a turbo can make full boost at less than WOT and less than redline, the only way to make the stock computer produce safe fuel curves is to run it too rich off boost.
Could you get by with the stock computer and HPTune? Yes. Would it be optimal? No. A turbo requires some engine management that the stock computer cannot provide (namely, a boost sensor and fuel/spark adjusted accordingly).
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I think this is what you want?
Document ID# 1597180
2006 Chevrolet Cobalt
--------------------------------------------------------------------------------
Engine Control Module Connector End Views
Connector 1: Engine Control Module (ECM) C1
Connector 2: Engine Control Module (ECM) C2
Connector 3: Engine Control Module (ECM) C3
Engine Control Module (ECM) C1
Connector Part Information
OEM: 15492320
Service: 88988821
Description: 56-Way F Micro 64 Series Sealed (BU)
Terminal Part Information
Pins: 16, 35, 37, 41
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit
Pins: 2, 6, 19, 20, 55
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 7, 9, 12, 13, 18, 33, 34, 36, 40, 44, 47, 48, 49, 53, 54, 56
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C1 Pin
Wire Color
Circuit No.
Function
1
--
--
Not Used
2
PU
420
TCC Brake Switch/Cruise Control Release Signal
3-5
--
--
Not Used
6
BN/WH
379
CPP Switch Signal
7
L-BU
20
Stop Lamp Switch Signal
8
--
--
Not Used
9
TN
2759
Low Reference
10-11
--
--
Not Used
12
BN/WH
419
MIL Control
13
D-GN/WH
465
Fuel Pump Relay Control
14-15
--
--
Not Used
16
PU
16
VSS Low Signal
17
--
--
Not Used
18
BN
4
Accessory Voltage
19
PK/BK
1039
Ignition 1 Voltage
20
RD/WH
840
Battery Positive Voltage
21-32
--
--
Not Used
33
WH/BK
1164
5-Volt Reference-1
34
GY
2709
5-Volt Reference-1
35
PU
1272
5-Volt Reference-1
36
BN
1271
Low Reference
37
tn
1274
Low Reference
38-39
--
--
Not Used
40
BN
5069
Powertrain relay Control
41
YE
400
VSS High Signal
42-43
--
--
Not Used
44
PU
1589
Fuel Level Sensor Signal
44-46
--
--
Not Used
47
D-BU
1161
APP Sensor 1 Signal
48
D-GN
890
Fuel Tank Pressure Sensor Signal
49
L-BU
1162
APP Sensor 2 Signal
50-52
--
--
Not Used
53
D-GN/WH
459
A/C Compressor Clutch Relay Control
54
D-BU
473
High Speed Cooling Fan Relay Control
55
WH
1310
EVAP Canister Vent Solenoid Control
56
YE
447
Starter Relay Coil Control
Engine Control Module (ECM) C2
Connector Part Information
OEM: 15492322
Service: 88988360
Description: 73-Way F GT 280 Series Micro 64 Sealed (BK)
Terminal Part Information
Pins: 18, 19
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit
Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: 2/5
Release Tool/Test Probe: 12094430/J-35616-35 (VT)
Pins: 1, 8, 9, 14, 17, 20, 23, 30, 33, 35, 36, 39, 42, 46, 50, 53, 56, 59, 62, 67
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 2 -- 5, 11, 12, 13, 27, 29, 32, 43, 44, 48, 63, 64, 66, 68, 69, 71, 72,
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 2 -- 5, 27, 29, 32, 43, 44, 48, 63, 64, 66, 68, 69, 71, 72: J/J
Core/Insulation Crimp: Pins 11 -- 13: K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C2 Pin
Wire Color
Circuit No.
Function
1
PU
2121
IC 1 Control
2
TN/WH
3111
HO2S Low Reference Bank 1 Sensor 1
3
PU/WH
3110
HO2S Reference Voltage Bank 1 Sensor 1
4
PU/WH
1668
HO2S High Signal - Bank 1 Sensor 1
5
TN/WH
1669
HO2S Low Signal - Bank 1 Sensor 2
6-7
--
--
Not Used
8
D-BU
496
Knock Sensor Signal
9
GY
1716
Low Reference
10
--
--
Not Used
11
YE
581
TAC Motor Control (1)
12
BN
582
TAC Motor Control (2)
13
PK/BK
5293
Ignition 1 Voltage
14
PK/BK
6395
CMP Actuator Solenoid Control Intake
15-16
--
--
Not Used
17
L-BU
2123
IC 3 Control
18
YE
400
VSS High Signal (w/M86)
19
PU
401
VSS Low Signal (w/M86)
20
GY
5296
Low Reference
21-22
--
--
Not Used
23
TN
5301
Low Reference
24-26
--
--
Not Used
27
PU
574
Low Reference
28
--
--
Not Used
29
TN
2752
Low Reference
30
L-GN
5282
Low Reference
31
--
--
Not Used
32
L-GN/BK
1745
Fuel Injector (2) Control
33
D-GN/WH
2124
IC 4 Control
34
--
--
Not Used
35
BN
2129
Low Reference
36
YE/BK
5297
5-Volt Reference-1
37-38
--
--
Not Used
39
D-BU
5300
5-Volt Reference-1
40-41
--
--
Not Used
42
TN
2760
Low Reference
43
L-GN
2867
5-Volt Reference-2
44
GY
2701
5-Volt Reference-2
45
--
--
Not Used
46
PU
5284
Low Reference
47
--
--
Not Used
48
PK/BK
1746
Fuel Injector (3) Control
49
--
--
Not Used
50
WH/BK
6396
CMP Actuator Solenoid Control Exhaust
51-52
--
--
Not Used
53
OG/WH
2122
IC 2 Control
54-55
--
--
Not Used
56
D-GN
5273
CMP Sensor Signal
57-58
--
--
Not Used
59
OG
5275
CMP Sensor Signal
60-61
--
--
Not Used
62
TN
472
IAT Sensor Signal
63
YE
573
CKP Sensor Signal
64
D-GN
485
TP Sensor 1 Signal
65
--
--
Not Used
66
PU
486
TP Sensor 2 Signal
67
YE
492
MAF Sensor Signal
68
BK/WH
3113
HO2S Heater Low Control - Bank 1 Sensor 1
69
BK/WH
3122
HO2S Heater Low Control - Bank 2 Sensor 1
70
--
--
Not Used
71
L-BU/BK
844
Fuel Injector (4) Control
72
TN
1744
Fuel Injector (1) Control
73
BK/WH
451
Ground
Engine Control Module (ECM) C3
Connector Part Information
OEM: 15492321
Service: 88988361
Description: 73-Way F GT 280 Series Micro 64 Sealed (GY)
Terminal Part Information
Pins: 7, 21, 23, 29, 33, 35, 37, 39, 47, 48, 49, 53, 55, 57, 59, 65
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 28, 44
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C3 Pin
Wire Color
Circuit No.
Function
1-6
--
--
Not Used
7
OG
225
Generator Turn On Signal
8-20
--
--
Not Used
21
BK/WH
2751
Low Reference
22
--
--
Not Used
23
OG/BK
469
Low Reference
24-27
--
--
Not Used
28
TN/WH
1704
Low Reference
29
GY/WH
23
Generator Field Duty Cycle Signal
30-32
--
--
Not Used
33
TN
2501
High Speed GMLAN Serial Data (-)
34
--
--
Not Used
35
TN
2761
Low Reference
36
--
--
Not Used
37
GY
2700
5-Volt Reference-1
38
--
--
Not Used
39
GY
2704
5-Volt Reference-1
40-43
--
--
Not Used
44
L-BU/BK
1688
5-Volt Reference-2
45-46
--
--
Not Used
47
D-GN
1433
PNP/Clutch Start Switch Signal (M86)
48
D-GN/WH
428
EVAP Canister Purge Solenoid Control
49
D-GN
335
Low Speed Cooling Fan Relay Control
50-52
--
--
Not Used
53
TN/BK
2500
High Speed GMLAN Serial Data (+)
54
--
--
Not Used
55
YE
410
ECT Sensor Signal
56
--
--
Not Used
57
OG/BK
380
A/C Refrigerant Pressure Sensor Signal
58
--
--
Not Used
59
L-GN
432
MAP Sensor Signal
60-64
--
--
Not Used
65
TN/BK
231
Oil Pressure Switch Signal
66-73
--
--
Not Used
2006 Chevrolet Cobalt
--------------------------------------------------------------------------------
Engine Control Module Connector End Views
Connector 1: Engine Control Module (ECM) C1
Connector 2: Engine Control Module (ECM) C2
Connector 3: Engine Control Module (ECM) C3
Engine Control Module (ECM) C1
Connector Part Information
OEM: 15492320
Service: 88988821
Description: 56-Way F Micro 64 Series Sealed (BU)
Terminal Part Information
Pins: 16, 35, 37, 41
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit
Pins: 2, 6, 19, 20, 55
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 7, 9, 12, 13, 18, 33, 34, 36, 40, 44, 47, 48, 49, 53, 54, 56
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C1 Pin
Wire Color
Circuit No.
Function
1
--
--
Not Used
2
PU
420
TCC Brake Switch/Cruise Control Release Signal
3-5
--
--
Not Used
6
BN/WH
379
CPP Switch Signal
7
L-BU
20
Stop Lamp Switch Signal
8
--
--
Not Used
9
TN
2759
Low Reference
10-11
--
--
Not Used
12
BN/WH
419
MIL Control
13
D-GN/WH
465
Fuel Pump Relay Control
14-15
--
--
Not Used
16
PU
16
VSS Low Signal
17
--
--
Not Used
18
BN
4
Accessory Voltage
19
PK/BK
1039
Ignition 1 Voltage
20
RD/WH
840
Battery Positive Voltage
21-32
--
--
Not Used
33
WH/BK
1164
5-Volt Reference-1
34
GY
2709
5-Volt Reference-1
35
PU
1272
5-Volt Reference-1
36
BN
1271
Low Reference
37
tn
1274
Low Reference
38-39
--
--
Not Used
40
BN
5069
Powertrain relay Control
41
YE
400
VSS High Signal
42-43
--
--
Not Used
44
PU
1589
Fuel Level Sensor Signal
44-46
--
--
Not Used
47
D-BU
1161
APP Sensor 1 Signal
48
D-GN
890
Fuel Tank Pressure Sensor Signal
49
L-BU
1162
APP Sensor 2 Signal
50-52
--
--
Not Used
53
D-GN/WH
459
A/C Compressor Clutch Relay Control
54
D-BU
473
High Speed Cooling Fan Relay Control
55
WH
1310
EVAP Canister Vent Solenoid Control
56
YE
447
Starter Relay Coil Control
Engine Control Module (ECM) C2
Connector Part Information
OEM: 15492322
Service: 88988360
Description: 73-Way F GT 280 Series Micro 64 Sealed (BK)
Terminal Part Information
Pins: 18, 19
Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit
Pins: 73
Terminal/Tray: 7116-4152-02/9
Core/Insulation Crimp: 2/5
Release Tool/Test Probe: 12094430/J-35616-35 (VT)
Pins: 1, 8, 9, 14, 17, 20, 23, 30, 33, 35, 36, 39, 42, 46, 50, 53, 56, 59, 62, 67
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 2 -- 5, 11, 12, 13, 27, 29, 32, 43, 44, 48, 63, 64, 66, 68, 69, 71, 72,
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 2 -- 5, 27, 29, 32, 43, 44, 48, 63, 64, 66, 68, 69, 71, 72: J/J
Core/Insulation Crimp: Pins 11 -- 13: K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C2 Pin
Wire Color
Circuit No.
Function
1
PU
2121
IC 1 Control
2
TN/WH
3111
HO2S Low Reference Bank 1 Sensor 1
3
PU/WH
3110
HO2S Reference Voltage Bank 1 Sensor 1
4
PU/WH
1668
HO2S High Signal - Bank 1 Sensor 1
5
TN/WH
1669
HO2S Low Signal - Bank 1 Sensor 2
6-7
--
--
Not Used
8
D-BU
496
Knock Sensor Signal
9
GY
1716
Low Reference
10
--
--
Not Used
11
YE
581
TAC Motor Control (1)
12
BN
582
TAC Motor Control (2)
13
PK/BK
5293
Ignition 1 Voltage
14
PK/BK
6395
CMP Actuator Solenoid Control Intake
15-16
--
--
Not Used
17
L-BU
2123
IC 3 Control
18
YE
400
VSS High Signal (w/M86)
19
PU
401
VSS Low Signal (w/M86)
20
GY
5296
Low Reference
21-22
--
--
Not Used
23
TN
5301
Low Reference
24-26
--
--
Not Used
27
PU
574
Low Reference
28
--
--
Not Used
29
TN
2752
Low Reference
30
L-GN
5282
Low Reference
31
--
--
Not Used
32
L-GN/BK
1745
Fuel Injector (2) Control
33
D-GN/WH
2124
IC 4 Control
34
--
--
Not Used
35
BN
2129
Low Reference
36
YE/BK
5297
5-Volt Reference-1
37-38
--
--
Not Used
39
D-BU
5300
5-Volt Reference-1
40-41
--
--
Not Used
42
TN
2760
Low Reference
43
L-GN
2867
5-Volt Reference-2
44
GY
2701
5-Volt Reference-2
45
--
--
Not Used
46
PU
5284
Low Reference
47
--
--
Not Used
48
PK/BK
1746
Fuel Injector (3) Control
49
--
--
Not Used
50
WH/BK
6396
CMP Actuator Solenoid Control Exhaust
51-52
--
--
Not Used
53
OG/WH
2122
IC 2 Control
54-55
--
--
Not Used
56
D-GN
5273
CMP Sensor Signal
57-58
--
--
Not Used
59
OG
5275
CMP Sensor Signal
60-61
--
--
Not Used
62
TN
472
IAT Sensor Signal
63
YE
573
CKP Sensor Signal
64
D-GN
485
TP Sensor 1 Signal
65
--
--
Not Used
66
PU
486
TP Sensor 2 Signal
67
YE
492
MAF Sensor Signal
68
BK/WH
3113
HO2S Heater Low Control - Bank 1 Sensor 1
69
BK/WH
3122
HO2S Heater Low Control - Bank 2 Sensor 1
70
--
--
Not Used
71
L-BU/BK
844
Fuel Injector (4) Control
72
TN
1744
Fuel Injector (1) Control
73
BK/WH
451
Ground
Engine Control Module (ECM) C3
Connector Part Information
OEM: 15492321
Service: 88988361
Description: 73-Way F GT 280 Series Micro 64 Sealed (GY)
Terminal Part Information
Pins: 7, 21, 23, 29, 33, 35, 37, 39, 47, 48, 49, 53, 55, 57, 59, 65
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Pins: 28, 44
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C3 Pin
Wire Color
Circuit No.
Function
1-6
--
--
Not Used
7
OG
225
Generator Turn On Signal
8-20
--
--
Not Used
21
BK/WH
2751
Low Reference
22
--
--
Not Used
23
OG/BK
469
Low Reference
24-27
--
--
Not Used
28
TN/WH
1704
Low Reference
29
GY/WH
23
Generator Field Duty Cycle Signal
30-32
--
--
Not Used
33
TN
2501
High Speed GMLAN Serial Data (-)
34
--
--
Not Used
35
TN
2761
Low Reference
36
--
--
Not Used
37
GY
2700
5-Volt Reference-1
38
--
--
Not Used
39
GY
2704
5-Volt Reference-1
40-43
--
--
Not Used
44
L-BU/BK
1688
5-Volt Reference-2
45-46
--
--
Not Used
47
D-GN
1433
PNP/Clutch Start Switch Signal (M86)
48
D-GN/WH
428
EVAP Canister Purge Solenoid Control
49
D-GN
335
Low Speed Cooling Fan Relay Control
50-52
--
--
Not Used
53
TN/BK
2500
High Speed GMLAN Serial Data (+)
54
--
--
Not Used
55
YE
410
ECT Sensor Signal
56
--
--
Not Used
57
OG/BK
380
A/C Refrigerant Pressure Sensor Signal
58
--
--
Not Used
59
L-GN
432
MAP Sensor Signal
60-64
--
--
Not Used
65
TN/BK
231
Oil Pressure Switch Signal
66-73
--
--
Not Used
#6
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Im not saying your doing it wrong, the way your doing will work just fine if not better, but its really not that big of a deal to tune it correctly in hp tuners.
#7
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Thread Starter
Join Date: 05-17-06
Location: Denver Metro
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DeniSS!! You're the MAN!
THANKS!!! PM sent.
I'm not sure where the FA ratio goes before WOT, but I know from my dyno time that the 2.4 runs WAY rich under open loop. I thought about tuning first with HPTune for best performance under non-boost, then tuning the piggy-back to provide boost compensation.
I think what we might do is install the turbo, set up the piggy-back, run on the dyno under all throttle conditions, and see what the FA ratio and ignition looks like. We might actually use the overly rich condition to our advantage, and might not need additional fuel. However, I believe we'll still need to back off timing slightly under boost. Won't know until we get it on the dyno and log some things.
But I appreciate your input. It makes more sense than just expecting a tuned stock ECU to be able to deal with boost at part throttle (below WOT) and mid-RPM situations. This is one reason GM picked a supercharger, IMHO, because they're actually much easier to tune. But I LOVE that mid-range kick a turbo has over a supercharger, especially on the street.
THANKS!!! PM sent.
even with partial throttle boost, you tune your MAF for 14.7:1 without any WOT up until you click over to open loop... then tune your spark normally for where you want it. THEN you adjust your WOT and PE spark adder.
Im not saying your doing it wrong, the way your doing will work just fine if not better, but its really not that big of a deal to tune it correctly in hp tuners.
Im not saying your doing it wrong, the way your doing will work just fine if not better, but its really not that big of a deal to tune it correctly in hp tuners.
I think what we might do is install the turbo, set up the piggy-back, run on the dyno under all throttle conditions, and see what the FA ratio and ignition looks like. We might actually use the overly rich condition to our advantage, and might not need additional fuel. However, I believe we'll still need to back off timing slightly under boost. Won't know until we get it on the dyno and log some things.
But I appreciate your input. It makes more sense than just expecting a tuned stock ECU to be able to deal with boost at part throttle (below WOT) and mid-RPM situations. This is one reason GM picked a supercharger, IMHO, because they're actually much easier to tune. But I LOVE that mid-range kick a turbo has over a supercharger, especially on the street.
Last edited by LewiSS; 03-10-2007 at 11:43 PM. Reason: Automerged Doublepost
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