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| Illustration 1 | g00918434 |
(1) Connector J1 (2) Connector J2 (3) In order to remove the harness from the ECM, use screw (3) in the center of the harness connector. | |
The Power Train ECM makes decisions based on the information from inputs and information from memory. After the Power Train ECM receives the information from inputs and information from memory, the Power Train ECM will send a corresponding response through the outputs. The inputs and outputs of the Power Train ECM connect to the machine harness by two 40-pin connectors (J1 and J2).
Inputs
The machine has several input devices. The Power Train ECM receives information from components about machine operations. The machine has switch-type inputs and sensor-type inputs. Switches provide signals to the switch inputs of the ECM. The possible outputs of a switch are listed: an open signal, a grounded signal and + battery signal. Sensors provide a signal to the ECM that constantly changes. The inputs to the Power Train ECM are listed in the two tables for the 40-pin connector.
Outputs
The Power Train ECM sends electrical signals through the outputs. The outputs can create an action or the outputs can provide information to the Power Train ECM. The outputs for the Power Train ECM are listed in the two tables for the 40-pin connector.
Input/Output
The engine ECM and the Power Train ECM use the CAT data link in order to communicate with each other. The data link is bidirectional. The data link allows the ECM to receive information. The data link allows the ECM to send information. The data link allows the sharing of information with other electronic control modules.
The Power Train ECM and the instrument panel use the CAN data link to communicate with each other. The data link is bidirectional. The data link allows the ECM to receive information. The data link allows the ECM to send information. Engine information that needs to be displayed on the instrument panel is transmitted to the Power Train ECM on the CAT data link. Then, the Powertrain ECM sends the information to the instrument panel on the CAN data link.
For more information on the data links, see Systems Operation, "Data Link".
A module identifier (MID) is assigned to each ECM. The MID for the Power Train ECM is the number 081.
| Contact Description for the Power Train ECM J1 | ||
|---|---|---|
| No. (1) | Function | Type |
| 1 | +Battery | +Battery |
| 2 | Ground | Ground |
| 3 | CAT Data Link - | CAT Data Link - |
| 4 | Clutch 3 (Reverse) | Solenoid Output |
| 5 | Ground | Ground |
| 6 | +Battery | +Battery |
| 7 | Solenoid Return | Solenoid Return |
| 8 | Start Relay | Solenoid Output |
| 9 | CAT Data Link + | CAT Data Link + |
| 11 | Clutch 1 (FWD Low) | Solenoid Output |
| 12 | Ride Control Solenoid #2 | Solenoid Output |
| 13 | Direction Switch (Neutral) | Switch To Ground |
| 14 | Direction Switch (Reverse) | Switch To Ground |
| 15 | Switch/Sensor Return | Switch/Sensor Return |
| 16 | Switch/Sensor Return | Switch/Sensor Return |
| 17 | Clutch 2 (FWD High) | Solenoid Output |
| 18 | Ride Control Solenoid #1 | Solenoid Output |
| 19 | 1st Gear Switch) | Switch To Ground |
| 20 | VSC #1 (Minimum) | Switch To Ground |
| 21 | Ride Control Switch #1 | Switch To Ground |
| 22 | Ride Control Switch #2 | Switch To Ground |
| 23 | 2nd Gear Switch | Switch To Ground |
| 24 | VSC #2 (Medium) | Switch To Ground |
| 25 | 3rd Gear Switch | Switch To Ground |
| 26 | 4th Gear Switch | Switch To Ground |
| 27 | Park Brake Switch (N/C) | Switch To Ground |
| 29 | Auto/Man Switch (Manual) | Switch To Ground |
| 30 | Direction Switch (Forward) | Switch To Ground |
| 31 | Auto/Man Switch (Auto 4) | Switch To Ground |
| 32 | Implement Kickout Switch | Switch To Ground |
| 34 | Neutralizer Disable Switch | Switch To Battery 2 |
| 35 | Auto/Man Switch (Auto 1-4) | Switch To Ground |
| 36 | Park Brake Switch (N/O) | Switch To Ground |
| 37 | Secondary Steer Test Switch | Switch To Ground |
| 38 | Secondary Steer Pressure Switch (N/C) | Switch To Ground |
| 39 | VSC #3 (Maximum) | Switch To Ground |
| 40 | Key Start Switch To B+ | Switch To Battery 1 |
| ( 1 ) | The connector contacts that are not listed are not used. The connector has 40 contacts. |
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| Contact Description for the Power Train ECM J2 | ||
|---|---|---|
| No. (1) | Function | Type |
| 1 | Clutch 5 (Speed 3) | Solenoid Output |
| 2 | Clutch 6 (Speed 1) | Solenoid Output |
| 3 | Solenoid Return | Solenoid Return |
| 4 | Left Brake Pedal Sensor | Switch To Ground/PWM |
| 5 | Downshift (N/O) | Switch To Ground/PWM |
| 6 | Primary Steer Pressure Switch (N/C) | Switch To Ground/PWM |
| 7 | Secondary Steering Relay) | Solenoid Output |
| 8 | Clutch 4 (Speed 2) | Solenoid Output |
| 10 | Primary Steer Pressure Switch (N/O) | Switch To Ground/PWM |
| 11 | Secondary Steer Pressure Switch (N/O) | Switch To Ground/PWM |
| 12 | Sensor Supply +8 Volts | Sensor Supply +8 Volts |
| 13 | Implement Aux/Float Detent | Solenoid Output |
| 14 | Output Speed - | Frequency Input - |
| 18 | Transmission Oil Temperature | Switch To Ground/PWM |
| 19 | Implement Lift/Tilt Detent | Solenoid Output |
| 20 | Output Speed + | Frequency Input + |
| 23 | Input Speed - | Frequency Input - |
| 24 | Intermediate Speed + | Frequency Input + |
| 25 | Output Speed Q+ | Frequency Input Q+ |
| 29 | Input Speed + | Frequency Input + |
| 30 | Intermediate Speed Q- | Frequency Input Q- |
| 31 | Output Speed Q- | Frequency Input Q- |
| ( 1 ) | The connector contacts that are not listed are not used. The connector has 40 contacts. |