Transmission Control Module (TCM) (MT1)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Transmission Control Module (TCM) (MT1)
| Pin | Wire Color | Circuit | Function |
|---|---|---|---|
| 1 | 0.5 BN | 418 | Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve Control |
| 2 | 0.5 L-GN | 1222 | 1-2 Shift Solenoid Valve Control |
| 3 | 0.35 OG/BK | 1230 | Automatic Transmission Input Speed Sensor (AT ISS) High Signal |
| 4 | - | - | Not Used |
| 5 | 0.35 OG/BK | 6399 | Replicated TOS Signal |
| 6 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus - (CAN) |
| 7 | 0.5 TN/WH | 2500 | High Speed GMLAN Serial Data Bus + (CAN) |
| 8-10 | - | - | Not Used |
| 11 | 0.35 D-BU | 5985 | Accessory Wake Up Serial Data |
| 12-14 | - | - | Not Used |
| 15 | 0.35 TN/BK | 2500 | High Speed GMLAN Serial Data Bus + (CAN) |
| 16 | 0.5 L-GN/BK | 822 | Vehicle Speed Sensor (VSS) Low Signal |
| 17 | 0.5 L-BU/WH | 1229 | Pressure Control (PC) Solenoid Valve Low Control |
| 18 | - | - | Not Used |
| 19 | 0.35 TN | 2501 | High Speed GMLAN Serial Data Bus - (CAN) |
| 20 | 0.5 YE/BK | 1223 | 2-3 Shift Solenoid Valve Control |
| 21-22 | - | - | Not Used |
| 23 | 0.35 GY | 773 | Transmission Range (TR) Switch Signal C |
| 24 | 0.35 PK | 1224 | Transmission Fluid Pressure (TFP) Switch Signal A |
| 25 | - | - | Not Used |
| 26 | D-BU/WH | 1231 | Automatic Transmission Input Speed Sensor (AT ISS) Low Signal |
| 27-28 | - | - | Not Used |
| 29 | 0.35 TN/WH | 771 | Transmission Range (TR) Switch Signal A |
| 30 | 0.35 TN | 2762 | Low Reference |
| 31 | 0.5 PK | 2139 | Ignition Voltage |
| 32 | 0.5 RD/WH | 1840 | Battery Positive Voltage |
| 33 | 0.35 OG | 1226 | Transmission Fluid Pressure (TFP) Switch Signal C |
| 34 | - | - | Not Used |
| 35 | 0.5 YE/BK | 1227 | Transmission Fluid Temperature (TFT) Sensor Signal |
| 36 | - | - | Not Used |
| 37 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus - (CAN) |
| 38 | 0.5 TN/WH | 2500 | High Speed GMLAN Serial Data Bus + (CAN) |
| 39 | 0.35 WH | 776 | Transmission Range (TR) Switch Signal P |
| 40 | 0.5 OG/BK | 1228 | Pressure Control (PC) Solenoid Valve High Control |
| 41 | 0.5 PU/WH | 821 | Vehicle Speed Sensor (VSS) High Signal |
| 42 | 0.5 L-BU/WH | 6311 | Brake Switch Signal |
| 43 | - | - | Not Used |
| 44 | D-BU | 1225 | Transmission Fluid Pressure (TFP) Switch Signal B |
| 45 | - | - | Not Used |
| 46 | 0.35 YE | 772 | Transmission Range (TR) Switch Signal B |
| 47-48 | - | - | Not Used |
| 49 | 0.8 BK/WH | 451 | Ground |
Connector Part Information
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