SAE J1939
A SAE J1939 compliant data link is required for communication with service tool (Cat ET), engines, anti-lock brake (ABS), and traction control systems (TCS), as well as instrument clusters, electronic control units and other devices that use this communications protocol.
The messages detailed below are supported.
| J1939 (PGN) | Parameter Name | Receive/Broadcast | From | To |
|---|---|---|---|---|
| 0 | Torque Speed Control 1:TSC1 | Broadcast | Trans | Engine |
| 0 | Torque Speed Control 1:TSC1 | Receive | ABS | Trans |
| 256 | Transmission Control 1 | Receive | Shift Selector | Trans |
| 256 | Transmission Control 1 | Receive | ABS | Trans |
| 57344 | Cab Message 1 : CM1 | Broadcast | Trans | Engine |
| 61440 | Electronic Retarder Control : ERC1 | Receive | Retarder | |
| 61440 | Electronic Retarder Control : ERC1 | Broadcast | Trans | |
| 61441 | Electronic Brake Controller 1 - EBC1 | Receive | Brake | |
| 61442 | Electronic Transmission Controller 1 : ETC1 | Broadcast | Trans | |
| 61443 | Electronic Engine Controller 2 - EEC2 | Receive | Engine | |
| 61444 | Electronic Engine Controller 1 - EEC1 | Receive | Engine | |
| 61445 | Electronic Transmission Controller 2: ETC2 | Broadcast | Trans | |
| 65098 | Electronic Transmission Controller 7: ETC7 | Broadcast | Trans | |
| 65135 | Adaptive Cruise Control ACC1 | Receive | Body Control | |
| 65226 | Diagnostic Message 1 - DM1 | Broadcast | Trans | |
| 65247 | Electronic Engine Controller 3 - EEC3 | Receive | Engine | |
| 65250 | Transmission Configuration : TCFG | Broadcast | Trans | |
| 65251 | Engine Configuration : EC | Receive | Engine | |
| 65261 | Cruise Control/Vehicle Speed Setup - CCSS | Request/Receive | Engine | |
| 65265 | Cruise Control/Vehicle Speed - CCVS | Receive | Engine | |
| 65265 | Cruise Control/Vehicle Speed - CCVS | Receive | Body Control | |
| 65265 | Cruise Control/Vehicle Speed - CCVS | Receive | Cab Control | |
| 65265 | Cruise Control/Vehicle Speed - CCVS | Receive | Instrument Cluster | |
| 65272 | Transmission Fluids : TF | Broadcast | Trans |
The SAE J1939 data link provides a method by which the transmission can limit speed/torque of engine or do a speed override of the engine.
Using the SAE J1939 data link, the transmission can send TSC1 messages to the engine to limit the torque output of the engine during a shift. This may be needed for protecting the transmission mechanical parts or it could be used just to improve the shift quality. There are two different needs for torque/speed limiting. One is during the shifts, the second type of torque limiting is needed by the transmission when the transmission is at stall condition. The engine speed will be limited to keep too high of a torque from being transmitted through the transmission.
SAE J1587
The SAE J1587 data link is supported for instrument cluster communication. The J1587 data link is not used in order to broadcast any diagnostic information.
| PID | MID | Description |
|---|---|---|
| 120 | 222 | Hydraulic Retarder Oil Temperature |
| 124 | 130 | Transmission Oil Level |
| 125 | 130 | Transmission Oil Level (Hi/Low) |
| 126 | 130 | Transmission Filter Differential Pressure |
| 161 | 130 | Input Shaft Speed |
| 162 | 130 | Transmission Range Selected |
| 163 | 130 | Transmission Range Attained |
| 177 | 130 | Transmission Oil Temperature |
| 191 | 130 | Transmission Output Shaft Speed |
| 44 | 130 | Warning Lamp Indicator |