Allison 1000 2000 Series Tcm Pinout

By | March 16, 2023

The Allison 1000 and 2000 Series TCMs are electronically controlled automatic transmissions that are used in a variety of heavy-duty vehicles, including trucks, buses, and construction equipment. The TCMs are responsible for shifting the transmission gears and providing the necessary torque to the wheels. The TCM pinout diagram provides a visual representation of the TCM's electrical connections. This diagram can be used to troubleshoot electrical problems with the TCM.

The TCM pinout diagram is typically located on the back of the TCM. The diagram is divided into two sections: the input side and the output side. The input side of the diagram shows the connections for the TCM's sensors and switches. The output side of the diagram shows the connections for the TCM's solenoids and actuators.

The following is a description of the TCM pinout diagram for the Allison 1000 and 2000 Series TCMs:

Input Side

* Pin 1: Battery positive (12 V) * Pin 2: Battery negative (12 V) * Pin 3: Engine speed signal (tachometer input) * Pin 4: Vehicle speed signal (VSS) * Pin 5: Transmission range switch (TRS) * Pin 6: Throttle position sensor (TPS) * Pin 7: Brake pedal switch (BPS) * Pin 8: Clutch pedal switch (CPS) * Pin 9: Neutral start switch (NSS) * Pin 10: Transmission fluid temperature sensor (TFTS) * Pin 11: Oil pressure switch (OPS) * Pin 12: Transmission cooler temperature sensor (TCTS)

Output Side

* Pin 13: Shift solenoid A (SA) * Pin 14: Shift solenoid B (SB) * Pin 15: Shift solenoid C (SC) * Pin 16: Shift solenoid D (SD) * Pin 17: Throttle valve control solenoid (TVCS) * Pin 18: Line pressure solenoid (LPS) * Pin 19: Lockup control solenoid (LCS) * Pin 20: Clutch apply solenoid (CAS) * Pin 21: Neutral safety switch (NSS) * Pin 22: Transmission control module (TCM) ground

The TCM pinout diagram can be used to troubleshoot electrical problems with the TCM. If a problem is suspected with the TCM, the first step is to check the wiring connections. The TCM pinout diagram can be used to identify which wires are connected to which terminals. If a wire is damaged or disconnected, it can be repaired or replaced.

If the wiring connections are all good, the next step is to check the TCM's input and output signals. The TCM pinout diagram can be used to identify which sensors and switches are connected to which terminals. A voltmeter can be used to check the voltage at each terminal. If the voltage is not within the specified range, the TCM may need to be replaced.

The TCM pinout diagram is a valuable tool for troubleshooting electrical problems with the Allison 1000 and 2000 Series TCMs. By understanding the TCM pinout diagram, you can quickly and easily identify and repair electrical problems.


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