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| Illustration 1 | g00848026 |
The implement electronic control module (ECM) is located inside the operator platform on the right side of the machine. The implement ECM can be accessed by removing the cover plate on the platform.
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| Illustration 2 | g00330892 |
Implement ECM (1) Connector J1. (2) Connector J2. | |
The implement ECM makes decisions based on information that is input to the ECM and information in memory. The implement ECM then sends a corresponding response through the outputs. The input signals and the output signals of the implement ECM are sent via the machine harness. The signals use contact connector J1 and contact connector J2.
ECM Input
The machine has several input devices. Input devices inform the implement ECM of the operating conditions of the machine. The machine has ECM input from switches and sensors. Switches provide an open to the ECM. Switches provide a ground to the ECM. Switches provide the +battery to the ECM. Sensors provide a constantly changing signal to the implement ECM. The input signals for the implement ECM are listed in the tables that follow.
ECM Output
The implement ECM responds to decisions by sending electrical signals through the outputs. The outputs can create an action or the outputs can provide information to the implement ECM. The outputs for the implement ECM are listed in the tables that follow.
Input/Output
The CATdata link is used to communicate with other electronic control modules on the machine. 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. A sample of the information that is passed between electronic control modules through the data link is shown below.
The implement ECM receives engine speed information from the power train ECM. The implement ECM uses this information to perform calibrations. The implement ECM receives information on the key start switch from the power train ECM. The implement ECM uses this information to deactivate during engine cranking. The implement ECM exchanges diagnostic information with the Caterpillar Monitoring System. A module identifier (MID) is assigned to all electronic control modules that use the data link. The MID for the Implement ECM is 082. The Caterpillar Monitoring System displays the diagnostic codes. The MID identifies the system that has a failed component.
| 40-Pin Connector J1 | ||
|---|---|---|
| No. (1) | Function | Type |
| 1 | +Battery | Power |
| 2 | Ground | Ground |
| 3 | Cat Data Link (-) | Input/Output |
| 4 | Lower Proportional Solenoid | Pulse Width Modulation |
| 5 | Ground | Ground |
| 6 | +Battery | Power |
| 7 | Solenoid Return | Output Return |
| 8 | Pilot ON/OFF Solenoid Valve | Solenoid Output (on/off) |
| 9 | CAT Data Link (+) | Input/Output |
| 10 | Lift Proportional Solenoid | Pulse Width Modulation |
| 11 | Tip Forward Proportional Solenoid | Pulse Width Modulation |
| 12 | Implement Pump Indicator | |
| 13 | Implement Lockout Switch (N/O) | Switch Input (open/ground) |
| 14 | Implement Lockout Switch (N/C) | Switch Input (open/ground) |
| 15 | Digital Return | Output Return |
| 16 | Digital Return | Output Return |
| 17 | Tip Back Proportional Solenoid | Solenoid Output (prop) |
| 18 | Lift Lever Raise Detent Coil | Solenoid Output (ON/OFF) |
| 23 | Hydraulic Function Selector Switch (N/O) | Switch Input (open/ground) |
| 24 | Hydraulic Function Selector Switch (N/C) | Switch Input (open/ground) |
| 30 | Option Code 1 | Switch Input (open/ground) |
| 31 | Option Code 2 | Switch Input (open/ground) |
| 40 | +Battery | Power |
| ( 1 ) | The connector contacts that are not listed are not used. |
| 40-Pin Connector J2 | ||
|---|---|---|
| No. (1) | Function | Type |
| 1 | Tilt Function (head end) | Solenoid Output (prop) |
| 3 | Solenoid Return | Output Return |
| 4 | Lift Lever Position Sensor | Sensor Input (PWM) |
| 5 | Tip Lever Position Sensor | Sensor Input (PWM) |
| 7 | Axle Oil Cooler Solenoid | Solenoid Output |
| 8 | Tilt Function (rod end) | Solenoid Output (prop) |
| 35 | Rotary Position Sensor for Lift Linkage | Sensor Input (PWM) |
| 37 | Lower Kickout Detent Solenoid | Solenoid Output (ON or OFF) |
| ( 1 ) | The connector contacts that are not listed are not used. |