Engine Control Module (ECM) X1 (LF1) Connector End View
Courtesy of GENERAL MOTORS CORP. Engine Control Module (ECM) X1 (LF1)
| Pin |
Wire |
Circuit |
Function |
| 1-3 |
- |
- |
Not Used |
| 4 |
0.5 YE/WH |
3200 |
Air Inlet Absolute Pressure Sensor |
| 5 |
0.5 GY/WH |
3201 |
5-Volt Reference 1 |
| 6 |
0.5 OG/BK |
380 |
A/C Refrigerant Pressure Sensor Signal |
| 7-8 |
- |
- |
Not Used |
| 9 |
0.5 D-GN |
890 |
Fuel Tank Pressure Sensor Signal |
| 10 |
0.5 GY |
2709 |
5-Volt Reference 1 |
| 11-13 |
- |
- |
Not Used |
| 14 |
0.5 WH/BK |
1164 |
5-Volt Reference 4 |
| 15 |
0.5 D-BU |
1161 |
APP Sensor 1 Signal |
| 16-19 |
- |
- |
Not Used |
| 20 |
0.5 TN/WH |
3202 |
Low Reference |
| 21 |
0.5 GY |
2700 |
5-Volt Reference 1 |
| 22 |
0.5 TN |
5514 |
Low Reference |
| 23-24 |
- |
- |
Not Used |
| 25 |
0.5 D-BU |
1936 |
Primary Fuel Level Sensor Signal |
| 26 |
0.5 TN |
2759 |
Low Reference |
| 27 |
0.5 L-BU |
1937 |
Secondary Fuel Level Sensor Signal |
| 28-29 |
- |
- |
Not Used |
| 30 |
0.5 BN |
1271 |
Low Reference |
| 31 |
- |
- |
Not Used |
| 32 |
0.5 D-GN/WH |
459 |
A/C Compressor Clutch Relay Control |
| 33 |
0.5 TN |
1274 |
5-Volt Reference 3 |
| 34 |
0.5 L-BU |
1162 |
APP Sensor 2 Signal |
| 35-38 |
- |
- |
Not Used |
| 39 |
0.5 TN/BK |
2500 |
High Speed GMLAN Serial Data Bus+ |
| 40 |
0.5 TN |
2501 |
High Speed GMLAN Serial Data Bus- |
| 41 |
- |
- |
Not Used |
| 42 |
0.5 D-BU |
473 |
High Speed Cooling Fan Relay Control |
| 43 |
- |
- |
Not Used |
| 44 |
0.5 D-GN/WH |
465 |
Fuel Pump Relay Control - Primary |
| 45 |
- |
- |
Not Used |
| 46 |
0.5 BN/WH |
419 |
MIL Control |
| 47 |
0.5 D-BU/WH |
7361 |
5-Volt Reference 2 - Manual Transmission Clutch Position Sensor (MV7) |
| 48 |
0.5 TN |
6338 |
Manual Transmission Clutch Position Sensor Signal Position (MV7) |
| 49-50 |
- |
- |
Not Used |
| 51 |
0.5 PK |
339 |
Ignition 1 Voltage |
| 52 |
0.5 RD/WH |
340 |
Battery Positive Voltage |
| 53 |
0.5 PU |
1272 |
Low Reference |
| 54-56 |
- |
- |
Not Used |
| 57 |
0.5 WH |
17 |
Stop Lamp Switch Signal (MYA) |
| 58 |
- |
- |
Not Used |
| 59 |
0.5 D-GN |
335 |
Low Speed Cooling Fan Relay Control |
| 60-61 |
- |
- |
Not Used |
| 62 |
0.5 PK/BK |
5291 |
Ignition 1 Voltage |
| 63 |
0.5 YE |
447 |
Starter Relay Coil Control |
| 64-65 |
- |
- |
Not Used |
| 66 |
0.75 WH |
1310 |
EVAP Canister Vent Solenoid Control |
| 67 |
0.5 PK/BK |
5292 |
Ignition 1 Voltage |
| 68 |
0.5 OG/GN |
7360 |
Manual Transmission Clutch Position Sensor Return (MV7) |
| 69 |
- |
- |
Not Used |
| 70 |
0.5 D-BU |
5985 |
Accessory Wakeup Serial Data |
| 71 |
- |
- |
Not Used |
| 72 |
0.5 BN |
5069 |
PWR/TRN Relay Control |
| 73 |
2 PK/BK |
5290 |
PWR/TRN Relay Voltage |
Connector Part Information
- Harness Type: Engine
- OEM Connector: 34566-0303
- Service Connector: 13574782
- Description: 73-Way F 0.64 2.8 Series, Sealed (BK with BU Terminal Position Assurance Lock)
|
Terminal Part Information
- Pins: 1-72
- Terminated Lead: 13575575
- Release Tool: J-38125-213
- Diagnostic Test Probe: J-35616-64B (L-BU)
- Terminal/Tray: 33467-0005/23
- Core/Insulation Crimp: J/J
- Pin: 73
- Terminated Lead: SEALED: 13576392 UNSEALED: 13575797
- Release Tool: J-38125-11A
- Diagnostic Test Probe: J-35616-35 (VT)
- Terminal/Tray: 7116-4152-02/9
- Core/Insulation Crimp: 2/5
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