Engine Control Module (ECM) C3
Courtesy of GENERAL MOTORS CORP. Engine Control Module (ECM) C3
| Pin |
Wire |
Circuit |
Function |
| 1-2 |
- |
- |
Not Available |
| 3 |
0.5 TN |
1667 |
HO2S Low Signal - Bank 2 Sensor 1 (5.3L, 6.0L) |
| 4 |
0.5 PU |
1666 |
HO2S High Signal - Bank 2 Sensor 1 (5.3L, 6.0L) |
| 5 |
0.5 PU |
1670 |
HO2S High Signal - Bank 2 Sensor 2 (5.3L, 6.0L) |
| 6 |
0.5 TN |
1671 |
HO2S Low Signal - Bank 2 Sensor 2 (5.3L, 6.0L) |
| 7 |
0.35 PU |
5428 |
Generator Regulator Control |
| 8 |
- |
- |
Not Available |
| 9 |
0.5 BN |
436 |
Air Pump Relay Control (4.2L) |
| 10 |
0.5 GY |
5493 |
Cylinder Shutoff Solenoid Control (3) (5.3L, 6.0L) |
| 11 |
0.5 D-BU |
5491 |
Cylinder Shutoff Solenoid Control (1) (5.3L, 6.0L) |
| 12 |
0.35 TN/BK |
464 |
Delivered Torque Signal |
| 13-14 |
- |
- |
Not Available |
| 15 |
0.5 L-GN |
3212 |
HO2S Heater Low Control - Bank 2 Sensor 1 (5.3L, 6.0L) |
| 16 |
- |
- |
Not Available |
| 17 |
0.35 OG/BK |
463 |
Requested Torque Signal |
| 18-20 |
- |
- |
Not Available |
| 21 |
0.35 BK |
2751 |
Low Reference |
| 22 |
- |
- |
Not Available |
| 23 |
0.35 OG/BK |
469 |
Low Reference |
| 24-25 |
- |
- |
Not Available |
| 26 |
0.5 D-BU/WH |
6785 |
Air Injection Reaction Control Valve 1 Low Reference (4.2L) |
| 27 |
- |
- |
Not Available |
| 28 |
- |
- |
Not Used |
| 29 |
0.35 GY |
23 |
Generator Field Duty Cycle Signal |
| 30-32 |
- |
- |
Not Available |
| 33 |
0.35 TN |
2501 |
High Speed GMLAN Serial Data Bus - |
| 34 |
- |
- |
Not Available |
| 35 |
0.35 BK |
2761 |
Low Reference |
| 36 |
- |
- |
Not Available |
| 37 |
0.35 GY |
2700 |
5-Volt Reference |
| 38 |
- |
- |
Not Available |
| 39 |
0.35 GY |
2704 |
5-Volt Reference |
| 40-41 |
- |
- |
Not Available |
| 42 |
0.5 BN/WH- |
6789 |
Air Injection Reaction Control Valve 1-Volt Reference (4.2L) |
| 43 |
- |
- |
Not Available |
| 44 |
- |
- |
Not Used |
| 45-46 |
- |
- |
Not Available |
| 47 |
0.35 OG/BK |
1786 |
PNP Switch Signal |
| 48 |
0.5 D-GN/WH |
428 |
EVAP Canister Purge Solenoid Control |
| 49 |
- |
- |
Not Used |
| 50 |
0.5 RD/WH |
3223 |
HO2S Heater Low Control - Bank 2 Sensor 2 (5.3L, 6.0L) |
| 51-52 |
- |
- |
Not Available |
| 53 |
0.35 TN/WH |
2500 |
High Speed GMLAN Serial Data Bus + |
| 54 |
- |
- |
Not Available |
| 55 |
0.35 YE |
410 |
ECT Sensor Signal |
| 56 |
- |
- |
Not Available |
| 57 |
0.35 RD/BK |
380 |
A/C Refrigerant Pressure Sensor |
| 58 |
- |
- |
Not Available |
| 59 |
0.35 L-GN |
432 |
MAP Sensor Signal |
| 60-61 |
- |
- |
Not Available |
| 62 |
0.5 YE |
6787 |
Secondary Air Injection Pressure Sensor Signal (4.2L) |
| 63 |
- |
- |
Not Available |
| 64 |
- |
- |
Not Used |
| 65 |
0.35 TN/BK |
231 |
Oil Pressure Switch Signal (4.2L) |
| 66 |
0.35 YE |
400 |
Signal High - Front |
| 67 |
- |
- |
Not Available |
| 68 |
0.5 L-GN |
5492 |
Cylinder Shutoff Solenoid Control (4) (5.3L, 6.0L) |
| 69 |
0.5 OG |
5494 |
Cylinder Shutoff Solenoid Control (2) (5.3L, 6.0L) |
| 70-72 |
- |
- |
Not Available |
| 73 |
- |
- |
Not Used |
Connector Part Information
- OEM: 13608385 (4.2L)/13574284 (5.3L/6.0L)
- Service: 88988372
- Description: 73-Way F Receptacle 0.64 2.8 Series Sealed (GY)
|
Terminal Part Information
- Pins: 3-6, 10-11, 15, 26, 42, 48, 50, 62, 68-69
- Terminal/Tray: 33467-0005/23
- Core/Insulation Crimp: J/J
- Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
- Pins: 7, 12, 17, 21, 23, 29, 33, 35, 37, 39, 47, 49, 53, 55, 57, 59, 65, 66
- Terminal/Tray: 33467-0003/23
- Core/Insulation Crimp: H/H
- Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
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