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| Illustration 1 | g00279578 |
Electronic Control Module (Power Train) (1) Connector "J1" (2) Connector "J2" | |
The electronic control module (ECM) is the main component of the Power Train Electronic Control system. The ECM makes decisions based on input information and memory information. Then, the corresponding response is made through the outputs. The inputs of the ECM and the outputs of the ECM are connected to the machine harness by two connectors. Both connectors have 40 contacts. There are no visual indicators on the ECM. Information for the Power Train Electronic Control System is shown on the AVSpare Monitoring System. The ECM sends the information to the AVSpare Monitoring System via the AVS data link.
| Contact Description Of Connector J1 For The Electronic Control Module (Power Train) | ||
|---|---|---|
| Type | Function | No. |
| Power | +Battery | 1 |
| Ground | Ground | 2 |
| Input/Output | AVS Data Link (−) | 3 |
| Output | Transmission Solenoid (No. 1) | 4 |
| Ground | Ground | 5 |
| Power | +Battery | 6 |
| Ground | Solenoid Return (No. 1) | 7 |
| Output | Start Relay | 8 |
| Input/Output | AVS Data Link + | 9 |
| Output | Transmission Solenoid (No. 3) | 10 |
| Output | Transmission Solenoid (No. 8) | 11 |
| Output | Indicator (Automatic Shift) | 12 |
| Input | Eighth Gear | 13 |
| Ground | Return (Switch) | 15 |
| Ground | Return (Sensor) | 16 |
| Output | Transmission Solenoid (No. 2) | 17 |
| Input | Seventh Gear | 19 |
| Input | Third Gear | 20 |
| Input | Location Code 1 | 21 |
| Input | Location Code 0 | 22 |
| Input | Sixth Gear | 23 |
| Input | Second | 24 |
| Input | "PARK" | 25 |
| Input | Redundant "Neutral" | 26 |
| Input | Limit Switch (Clutch Pedal) (N/O) |
27 |
| Input | ECM Location Enable (+ Battery) | 28 |
| Input | Fourth Gear | 29 |
| Input | First Gear | 30 |
| Input | Reverse | 31 |
| Input | Autoshift Switch | 32 |
| Input | Bypass Switch (Transmission Filter) | 33 |
| Input | Fifth Gear | 35 |
| Input | Limit Switch (Clutch pedal) (N/C) | 36 |
| Input | Neutral | 37 |
| Input | Location Code 2 | 38 |
| Input | Forward | 39 |
| Input | Keyswitch | 40 |
| Contact Description Of Connector J2 For The Electronic Control Module (Power Train) | ||
|---|---|---|
| Output | Transmission Solenoid (No. 6) | 1 |
| Output | Transmission Solenoid (No. 7) | 2 |
| Ground | Solenoid Return (No. 2) | 3 |
| Input | Position Sensor (Clutch Pedal) | 4 |
| Output | Transmission Solenoid (No. 4) | 7 |
| Output | Transmission Solenoid (No. 5) | 8 |
| Input | Transmission Temperature Sensor | 10 |
| Input | − Transmission Output Speed Sensor (No. 1) | 14 |
| Output | Indicator (Filter Bypass) | 19 |
| Input | + Transmission Output Speed Sensor (No. 1) | 20 |
| Input | − Transmission Output Speed Sensor | 23 |
| Input | + Transmission INT Speed Sensor (No. 1) | 24 |
| Input | + Transmission Output Speed Sensor (No. 2) | 25 |
| Input | + Transmission Input Speed Sensor | 29 |
| Input | − Transmission INT Speed Sensor (No. 2) | 30 |
| Input | − Transmission Output Speed Sensor (No. 2) | 31 |
| Input | − Transmission INT Speed Sensor (No. 1) | 35 |
| Input | + Transmission INT Speed Sensor (No. 2) | 36 |
| Output | Backup Alarm | 37 |
Inputs
Numerous inputs inform the ECM of the status of the conditions of the machine. Two types of inputs exist. There are switch inputs and there are sensor inputs. Switches provide an open signal, a grounded signal, or a +battery signal to the inputs of the ECM. Sensors provide a signal to the ECM that changes in a proportional manner in order to reflect changing machine conditions. The inputs are listed in the tables of Contact Descriptions.
Outputs
The power train ECM responds to decisions by sending electrical signals through the various outputs. The outputs are pulse width modulated. The ECM operates the PWM outputs in an on/off manner or in a proportional manner. This depends on the requirements of the output device. The outputs create an action or the outputs provide information. The outputs are listed in the tables of Contact Descriptions.
Input/Output
The AVS data link is bidirectional. The ECM can receive information and the ECM can send information. The data link communicates with other electronic control modules on the machine. The data link also communicates with service tools. The communication permits information to be shared. The data link is not a visible component. The data link consists of internal ECM circuits and the connecting harness wiring. For more information, see System Operation, "AVS Data Link".