| Connector 1: | Automatic Transmission Input Shaft Speed (AT ISS) Sensor |
| Connector 2: | Automatic Transmission Shift Selector (Allison® MD) |
| Connector 3: | Overdrive Defeat Switch (Allison® LCT) |
| Connector 4: | Transmission Control Module (TCM) (Allison® LCT w/L18/LLY) |
| Connector 5: | Transmission Control Module (TCM) C1 (Allison® LCT w/LG4/LG5) |
| Connector 6: | Transmission Control Module (TCM) C2 (Allison® LCT w/LG4/LG5) |
| Connector 7: | Transmission Control Module (TCM) C1 (Allison® MD) |
| Connector 8: | Transmission Control Module (TCM) C2 (Allison® MD) |
| Connector 9: | Transmission Control Module (TCM) C3 (Allison® MD) |
| Connector 10: | Turbine Shaft Speed (TSS) Sensor (Allison® LCT) |
| Connector 11: | Vehicle Speed Sensor (VSS) |
Automatic Transmission Input Shaft Speed (AT ISS) Sensor
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
A | RD/BK | 1230 | AT ISS High Signal |
B | D-BU/WH | 1231 | AT ISS Low Signal |
Automatic Transmission Shift Selector (Allison® MD)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
1 | OG | 1940 | Battery Positive Voltage |
2 | L-BU | 553 | Tow/Haul Switch Signal |
3 | GY | 598 | 5-Volt Reference |
4 | BK/WH | 351 | Ground |
5 | GY | 8 | Instrument Panel Lamps Dimmer Switch Signal |
6 | -- | -- | Not Used |
7 | D-BU | 1378 | Transmission Shift Selector Display Signal |
8 | BK | 450 | Ground |
9 | D-GN | 1373 | Transmission Shift Selector Mode Signal |
10 | BK/WH | 771 | Transmission Range Switch Signal A |
11 | YE | 772 | Transmission Range Switch Signal B |
12 | L-GN | 1371 | Transmission Position Switch - Signal - Bit 4 |
13 | TN | 2654 | Transmission Position Switch - Signal - Bit 8 |
14 | WH | 776 | Transmission Range Switch Signal P |
Overdrive Defeat Switch (Allison® LCT)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
A | BK | 750 | Ground |
B | BK | 750 | Ground |
C | TN/WH | 2678 | Overdrive Defeat Switch Signal |
D | PK | 239 | Ignition 1 Voltage |
E | BN | 2509 | Left Rear Park Lamps Supply Voltage |
F | TN/WH | 2678 | Overdrive Defeat Switch Signal |
Transmission Control Module (TCM) (Allison® LCT w/L18/LLY)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
1 | TN | 1147 | Transmission Shift Inhibit Signal |
2 | -- | -- | Not Used |
3 | TN | 476 | Low Reference |
4 | L-BU | 1480 | Transmission Power Take-Off Enable Signal |
5 | OG/BK | 463 | Requested Torque Signal (L18) |
6 | D-BU | 6105 | High Speed GMLAN Serial Data Bus+ |
7-8 | -- | -- | Not Used |
9 | BK/WH | 351 | Ground |
10 | OG | 440 | Battery Positive Voltage |
11 | D-GN/WH | 2528 | 12-Volt Reference |
12-13 | -- | -- | Not Used |
14 | GY | 773 | Internal Mode Switch Signal C |
15-16 | -- | -- | Not Used |
17 | PK | 1224 | Transmission Fluid Pressure Switch Signal 1 |
18 | L-BU | 2221 | Signal High - Rear |
19 | -- | -- | Not Used |
20 | L-BU | 1984 | Transmission Turbine Speed Switch Low Reference |
21 | YE | 2522 | PTO Engaged Signal |
22 | WH | 2467 | Unmanaged Torque Signal (L18) |
23 | YE | 1479 | A/T Neutral Signal |
24-25 | -- | -- | Not Used |
26 | TN/WH | 6105 | High Speed GMLAN Serial Data Bus+ (L18) |
27 | TN | 6106 | High Speed GMLAN Serial Data Bus- |
28 | -- | -- | Not Used |
29 | GY | 1234 | Do Not Shift Indicator Control |
30-32 | -- | -- | Not Used |
33 | YE/BK | 2879 | Shift Solenoid 2 Valve Control |
34 | WH | 776 | Internal Mode Switch Signal P |
35 | -- | -- | Not Used |
36 | BN/WH | 2469 | PCS Valve 2 Control |
37-38 | -- | -- | Not Used |
39 | D-BU/WH | 1231 | AT ISS Low Signal |
40 | L-GN/BK | 822 | VSS Low Signal |
41-43 | -- | -- | Not Used |
44 | TN/BK | 464 | Delivered Torque Signal (L18) |
45 | PU | 1146 | Range Indicator |
46 | YE | 2470 | Class 2 Serial Data |
47 | TN | 6106 | High Speed GMLAN Serial Data Bus- (LLY) |
48-50 | -- | -- | Not Used |
51 | OG/WH | 2527 | Shift Solenoid 3 Valve Control |
52 | PU | 898 | Shift Solenoid 1 Valve Control |
53 | YE | 772 | Internal Mode Switch Signal B |
54 | YE/BK | 1227 | TFT Sensor Signal |
55 | L-BU/WH | 1229 | PCS Valve 1 Control |
56 | -- | -- | Not Used |
57 | RD | 1226 | Transmission Fluid Pressure Switch Signal 3 |
58 | BK | 407 | Low Reference |
59 | RD/BK | 1230 | AT ISS High Signal |
60 | PU/WH | 821 | VSS High Signal |
61 | TN/WH | 2678 | Overdrive Defeat Switch Signal |
62 | -- | -- | Not Used |
63 | PK | 1020 | Ignition 0 Voltage |
64 | -- | -- | Not Used |
65 | GY | 1524 | Backup Lamp Relay Control |
66 | D-BU | 6105 | High Speed GMLAN Serial Data Bus+ (LLY) |
67-68 | -- | -- | Not Used |
69 | BK/WH | 351 | Ground |
70 | OG | 440 | Battery Positive Voltage |
71 | BN | 323 | 12-Volt Reference |
72 | -- | -- | Not Used |
73 | BK/WH | 771 | Internal Mode Switch Signal A |
74 | D-BU | 1530 | Transmission Mainline Pressure Solenoid Control |
75 | -- | -- | Not Used |
76 | PU | 2471 | Trans ID |
77 | L-GN/BK | 2529 | Transmission Fluid Pressure Switch Signal 4 (Reverse) |
78 | WH | 1994 | TCC PWM Solenoid Valve Control |
79 | D-BU | 1225 | Transmission Fluid Pressure Switch Signal 2 |
80 | OG | 1983 | Transmission Turbine Speed Switch Signal |
Transmission Control Module (TCM) C1 (Allison® LCT w/LG4/LG5)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
1 | BK/WH | 351 | Ground |
2 | PK | 1020 | Ignition 0 Voltage |
3 | OG | 440 | Battery Positive Voltage |
4 | PK | 1020 | Ignition 0 Voltage |
5 | BK/WH | 351 | Ground |
6 | YE | 2522 | PTO Engaged Signal |
7 | PU | 420 | TCC Brake Switch/Cruise Control Release Signal |
8 | YE | 1479 | A/T Neutral Signal |
9 | -- | -- | Not Used |
10 | TN/WH | 2678 | Overdrive Defeat Switch Signal |
11 | TN | 1147 | Transmission Shift Inhibit Signal |
12 | GY/BK | 1694 | 4WD Low Signal (NP1) |
-- | -- | Not Used (w/o NP1) | |
13-18 | -- | -- | Not Used |
19 | L-BU | 1480 | Transmission Power Take-Off Enable Signal |
20 | -- | -- | Not Used |
21 | PU | 1146 | Range Indicator |
22-24 | -- | -- | Not Used |
25 | GY | 1234 | Do Not Shift Indicator Control |
26 | -- | -- | Not Used |
27 | L-BU | 2221 | Signal High - Rear (NP1) |
YE | 400 | VSS High Signal (w/o NP1) | |
28 | BK | 407 | Low Reference |
29 | YE | 2361 | SAE J1939 Serial Data Bus+ |
30 | YE | 2470 | Class 2 Serial Data |
31 | -- | -- | Not Used |
32 | D-GN | 2362 | SAE J1939 Serial Data Bus- |
Transmission Control Module (TCM) C2 (Allison® LCT w/LG4/LG5)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
1 | PK | 1224 | Transmission Fluid Pressure Switch Signal A |
2 | D-BU | 1225 | Transmission Fluid Pressure Switch Signal B |
3 | RD | 1226 | Transmission Fluid Pressure Switch Signal C |
4 | L-GN/BK | 2529 | Transmission Fluid Pressure Switch Signal R |
5 | BK/WH | 771 | Transmission Range Switch Signal A |
6 | YE | 772 | Transmission Range Switch Signal B |
7 | GY | 773 | Transmission Range Switch Signal C |
8 | WH | 776 | Transmission Range Switch Signal-Pariety Bit |
9 | -- | -- | Not Used |
10 | YE/BK | 1227 | TFT Sensor Signal |
11-12 | -- | -- | Not Used |
13 | OG | 1983 | Transmission Turbine Speed Switch Signal |
14 | L-BU | 1984 | Transmission Turbine Speed Switch Low Reference |
15 | PU/WH | 821 | VSS High Signal |
16 | L-GN/BK | 822 | VSS Low Signal |
17 | RD/BK | 1230 | AT ISS High Signal |
18 | D-BU/WH | 1231 | AT ISS Low Signal |
19 | GY | 1148 | Transmission Shift Inhibit Signal |
-- | -- | Not Used (LG4) | |
20 | BK | 2762 | Low Reference |
21 | PU | 2471 | Trans ID |
22 | L-BU/WH | 1229 | PC Solenoid Valve Low Control (Sol. A) |
23 | RD/BK | 1228 | PC Solenoid Valve High Control (Sol. A) |
24 | PK/BK | 2468 | PC Solenoid Valve High Control (Sol. B) |
25 | BN/WH | 2469 | PC Solenoid Valve Low Control (Sol. B) |
26 | L-GN | 1222 | Shift Solenoid A Valve Control |
27 | YE/BK | 1223 | Shift Solenoid B Valve Control |
28 | OG/WH | 2527 | Shift Solenoid C Valve Control |
29 | BN | 418 | TCC PWM Solenoid Valve Control |
30 | -- | -- | Not Used |
31 | BN | 323 | 12-Volt Reference |
32 | D-GN/WH | 2528 | Main Pressure Modulation |
Transmission Control Module (TCM) C1 (Allison® MD)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
1 | TN/BK | 1921 | SAE J1587 Serial Data Bus+ Primary |
2 | -- | -- | Not Used |
3 | GY | 598 | 5-Volt Reference |
4 | YE | 2655 | Ignition Sensor Signal |
5 | BK/WH | 771 | Transmission Range Switch Signal A |
6 | YE | 772 | Transmission Range Switch Signal B |
7 | L-GN | 1371 | Transmission Range Switch Signal C |
8 | TN | 2654 | Transmission Range Switch Signal P |
9 | WH | 776 | Transmission Range Switch Signal P |
10 | D-GN | 1373 | Transmission Shift Selector Mode Signal |
11-12 | -- | -- | Not Used |
13 | YE | 2361 | SAE J1939 Serial Data Bus+ |
14 | D-BU | 1378 | Transmission Shift Selector Display Signal |
15 | -- | -- | Not Used |
16 | RD/WH | 1940 | Battery Positive Voltage |
17 | WH/BK | 1922 | SAE J1708 Serial Data B |
18-28 | -- | -- | Not Used |
29 | D-GN | 2362 | SAE J1939 Serial Data Bus- |
30 | -- | -- | Not Used |
31 | GY | 1234 | Do Not Shift Indicator Control |
32 | L-BU | 553 | Tow/Haul Switch Signal |
Transmission Control Module (TCM) C2 (Allison® MD)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
1 | RD/WH | 440 | Battery Positive Voltage |
2 | PU | 1146 | Engine Brake Enable Signal |
3 | -- | -- | Not Used |
4 | GY | 1524 | Backup Lamp Relay Control |
5 | -- | -- | Not Used |
6 | YE | 1479 | A/T Neutral Signal |
7-10 | -- | -- | Not Used |
11 | TN | 1147 | Transmission Shift Inhibit Signal |
12 | YE | 1481 | Transmission Auxiliary Hold Signal |
13 | YE | 915 | PTO Engage Signal |
14-15 | -- | -- | Not Used |
16 | RD/WH | 440 | Battery Positive Voltage |
17 | BK/WH | 351 | Ground |
18 | -- | -- | Not Used |
19 | GY | 1148 | Transmission Shift Inhibit Signal |
20 | L-BU | 2221 | Signal High - Rear |
21 | -- | -- | Not Used |
22 | L-BU | 1480 | Transmission Power Take-Off Enable Signal |
23-25 | -- | -- | Not Used |
26 | PK | 1020 | Ignition 0 Voltage |
27-29 | -- | -- | Not Used |
30 | YE | 1479 | A/T Neutral Signal |
31 | TN | 476 | Low Reference |
32 | BK/WH | 351 | Ground |
Transmission Control Module (TCM) C3 (Allison® MD)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
1 | RD/BK | 1525 | 12-Volt Reference |
2 | WH | 1526 | 12-Volt Reference |
3 | D-GN | 1531 | 12-Volt Reference |
4 | OG | 1991 | Shift Solenoid A Valve Control |
5 | PU | 898 | Shift Solenoid C Valve Control |
6 | OG/WH | 2527 | Shift Solenoid E Valve Control |
7 | WH | 2880 | Shift Solenoid G Valve Control |
8 | -- | -- | Not Used |
9 | D-GN | 1313 | 5-Volt Reference |
10-11 | -- | -- | Not Used |
12 | RD | 1226 | Transmission Fluid Pressure Switch Signal C |
13 | PU | 2471 | Trans ID |
14 | RD/BK | 1230 | AT ISS High Signal |
15 | OG | 1983 | Transmission Turbine Speed Switch Signal |
16 | YE | 400 | Signal High - Front |
17 | L-GN | 1527 | 12-Volt Reference |
18-19 | -- | -- | Not Used |
20 | PU | 1992 | Shift Solenoid B Valve Control |
21 | YE/BK | 2879 | Shift Solenoid D Valve Control |
22 | WH | 1994 | Shift Solenoid F Valve Control |
23-24 | -- | -- | Not Used |
25 | BK | 407 | Low Reference |
26 | WH | 1971 | Transmission Oil Level Sensor Signal |
27 | YE/BK | 1227 | TFT Sensor Signal |
28-29 | -- | -- | Not Used |
30 | D-BU/WH | 1231 | AT ISS Low Signal |
31 | L-BU | 1984 | Transmission Turbine Speed Switch Low Reference |
32 | PU | 401 | Signal Low - Front |
Turbine Shaft Speed (TSS) Sensor (Allison® LCT)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
A | OG | 1983 | Transmission Turbine Speed Switch Signal |
B | L-BU | 1984 | Transmission Turbine Speed Switch Low Reference |
Vehicle Speed Sensor (VSS)
Connector Part Information
|
Terminal Part Information
|
Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
A | PU/WH | 821 | VSS High Signal (Allison® LCT) |
YE | 400 | VSS High Signal (Allison® MD) | |
B | L-GN/BK | 822 | VSS Low Signal (Allison® LCT) |
PU | 401 | VSS Low Signal (Allison® MD) |
