PUMP GP-GOV & FUEL INJ 2Y8994 - Caterpillar

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.
Table 1
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    
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