VOLVO
ECM-A640 - Transmission control module (TCM). Signal missing
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
3 ModelleC30 (2007–2013), S40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (3)
Was bedeutet der Fehlercode?
The engine control module receives information on torque loss in the gearbox from the transmission control module (TCM) over CAN. If that signal is missing or faulty, the code is set. The fault may therefore lie in the transmission control module or in the communication with it, and the car's running can then be affected.
Mögliche Ursachen
- A fault in the transmission control module (TCM)
Was Sie tun können
- 1Read the fault codes in the transmission control module (TCM) first, then in the central electronic module (CEM)
- 2The faults in the transmission control module and the CAN-related codes in the CEM must be remedied before this code is cleared
- 3Check the connectors and CAN wiring to the transmission control module for open circuits, chafing and oxidation
- 4Clear the fault code after the repair and road test the car to see whether the symptoms return
Symptome, die Sie bemerken können2
- Poor performance
- Hesitation, surging or jerky running at a steady speed
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.