Bus Messages, TRIONIC T7
For further description of the car's bus system, see BUS AND DIAGNOSTICS COMMUNICATION .
TRIONIC T7 BUS MESSAGES
| No control module | DTC |
|---|---|
| TCM | P1623 |
| MIU | P1622 |
| ESP | P1625 |
Trionic T7 uses the following information:
TRIONIC T7 USAGE INFORMATION
| Information | Unit | Sensor system | Description |
|---|---|---|---|
| Max. permissible torque | Nm | TCM | TCM sends the maximum permissible torque, unit Nm. The value is used in air mass control for engine torque limitation. |
| Sport position selected | ON/OFF | TCM | TCM transmits sport position, unit ON/OFF. This value is used in air mass control to correct the pedal position's conversion to the requested air mass/combustion. |
| Selector lever position, automatic gearbox | PRND321 | TCM | TCM transmits selector lever position, unit PRND321. This value is used in air mass control for idle speed control. |
| Vehicle speed, LH rear wheel | km/h | MIU | The MIU transmits speed information (in km/h). The value is used by the cruise control. |
| Reverse gear selected | ON/OFF | DICE | DICE transmits reverse gear selected, unit ON/OFF. This value is used to determine if first gear or reverse gear is engaged as the gear ratio does not sufficiently differentiate between these gears. |
| A/C request | ON/OFF | DICE | DICE transmits the A/C request, unit ON/OFF. This value is used in air mass regulation, compensation, to compensate for increased load. The control module also activates the A/C relay. |
| A/C pressure, highpressure side | bar | DICE | DICE transmits the pressure, unit bar. This value is used in air mass regulation, compensation, to calculate load increase before the A/C compressor is activated. |
| Current consumption | A | DICE | DICE transmits the estimated current consumption of the electrically heated rear window and radiator fan just before they are activated, unit A. This value is used in air mass regulation, compensation, to compensate for load increase. |
| Brake lights | ON/OFF | TWICE | TWICE transmits brake lights, unit ON/OFF. This value is used in air mass regulation for engine torque limitation. |
| Fuel level | Litres | MIU | MIU transmits fuel level, unit Litres. This value is used in on-board diagnostics to set special DTCs upon misfire in connection with low fuel level and for adaptation of fuel pressure sensor values. |
| CHECK ENGINE Request | ON/OFF | TCM | TCM transmits the request, unit ON/OFF. This value is used in onboard diagnostics to light CHECK ENGINE when ON is sent. DTC P1624 is set to indicate that the fault is in TCM. |
| Immobilization | ON/OFF | TWICE | TWICE transmits immobilization, unit ON/OFF. This value is used in fuel injection to activate fuel shut-off. |
| Ignition +50 | ON/OFF | DICE | DICE transmits +50, unit ON/OFF. This value is used for diagnosis of the crankshaft position sensor. |
| Vehicle speed, RH front wheel | km/h | ESP | The signal comes from the FR wheel speed sensor. This value is used for Traction Control. |
| Vehicle speed, output speed | km/h | TCM | Engine speed signal converted to vehicle speed. The engine speed signal is transmitted by a sensor in the gearbox. The output speed is the same as the vehicle speed. This value is used for engine torque limitation. |
| Diagnosis | DICE/diagnostic tool | The diagnostic tool sends a diagnostics request via DICE, no unit. This value is used to respond to the request in question. |
Trionic T7 transmits the following information:
TRIONIC T7 TRANSMITS INFORMATION
| Information | Unit | User system | Description |
|---|---|---|---|
| Engine torque | Nm | TCM, ESP | The air mass per combustion is converted to torque (Nm). This value is used by TCM and ESP. |
| Accelerator position | % | TCM, ESP | The highest requested value of air mass per combustion from the accelerator position or cruise control is selected. This value is converted to a corresponding accelerator position, unit percent. This value is used by TCM and ESP. |
| Kick-Down | ON/OFF | TCM, ESP | When voltage from pedal potentiometer 1 corresponds to the kickdown position (below 1.50 V), kickdown ON is sent (unit ON/OFF). This value is used by TCM and ESP. |
| Engine speed | RPM | MIU, TCM, ACC, ESP | Current engine speed is sent, unit RPM. This value is used by TCM, ACC and MIU. |
| Coolant temperature ( °C) | °C | MIU, DICE and ACC | Current temperature is sent, unit °C. This value is used by ACC, MIU and DICE. |
| Engine has started | ON/OFF | ACC, DICE, ESP | When engine speed exceeds 650 RPM, ON is sent (unit ON/OFF). This value is used by ACC, DICE and ESP. |
| Turbo measurement values | Missing | MIU | Current air mass/combustion is converted to a value between 0 and 255. This value is used by MIU. |
| CHECK ENGINE | ON/OFF | MIU | ON, unit ON/OFF, is sent when onboard diagnostics report that the lamp is to be turned on. The value is used by MIU. |
| SHIFT UP | ON/OFF | MIU | ON, unit ON/OFF, is sent when there is a light load and high engine speed or very high engine speed regardless of lead. This value is used by MIU. |
| CRUISE lamp | ON/OFF | MIU | ON, unit ON/OFF, is sent when cruise control is activated with the switch. This value is used by MIU. |
| Consumed fuel volume since start | ml | MIU | The value is 0 ml when the ignition is switched on and accumulates thereafter for each injection, unit ml. This value is used by MIU. |
| Diagnosis | DICE/diagnostic tool | Trionic T7 responds to the diagnostics request from the diagnostic tool via DICE, no unit. |