18265 / P1857 Lastsignal Error message from the motor-SG
The signal for 'motor-is-moment' is sent from the engine control unit to the control unit for automatic. Transmission - J217 - transmitted
-The exchange of information between the control units takes place via CAN-bus
-Condition for error detection: Engine speed and throttle signal are OK, but no load signal was detected for 245 ms.
Possible Cause
Motor control unit detects error in 'engine-is-moment'
Error Correction
Reading block 009: With hydraulic control 'E17'
Display Group 009 (Vehicles with CAN-Bus → Note)
Display Fields
1 … Nm Motor-is-moment during operation. A 2nd mechanic is required to read the values. During operation in a gear, the displayed torque remains constant and high, as no motor torque reduction is necessary. The transmission of engine torque from the engine control unit (ECU) to the transmission control unit (TCU) is done via CAN bus. If no or an implausible value is displayed: – Check and resolve the error in the engine control unit's (ECU) error memory.
–Identification of the control unit for automatic operation. Transmission - J217 - inspect
–Check CAN-Bus wires
2 … Nm Maximum torque in operation. To read the values, a 2. Mechanic Required: During the gear shifting process, the transmission control unit requires (reduced) engine torque.
3 …/min Motor speed, Measurement block 001, Display field 1
4 …% Throttle valve value, Measurement block 002, Display field 2
Throttle position or Gas pedal position when stationary, engine off – when increasing from idle to full throttle, the % value constantly increases.
-Target value at idle speed: 0 … 1 %
-Target value when the accelerator pedal is in full throttle position: 99 … 100 %
Possible Cause
Faulty or defective engine control unit
Mechanical engine failure
Error Correction
Check the engine control unit (ECU) for identification; query and clear the fault codes.
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