Was bedeutet der Fehlercode ECM-911A?

Diagnose und Fehlercodedefinition für ECM-911A (Volvo C70 Cabriolet (1998–2005), Volvo C70 Coupé (1998–2002), Volvo S60 (2001–2009)). Steuergerätereparatur bei OBD Tuning.

VOLVO

ECM-911A - Throttle unit communication. Faulty communication

System

Motorsteuergerät (ECM)

Volvo-Modelle, für die dieser Fehlercode gilt

Gilt für folgende Modelle:

9 Modelle

C70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008), V70 XC (1998–2000), V70 XC / XC70 (2001–2007)

Modelle nach Baujahr und Motor anzeigen (22)

Was bedeutet der Fehlercode?

The throttle unit module (ETM) and the engine control module (ECM) communicate over the CAN network. If the throttle module registers a serious disturbance, meaning the CAN communication is blocked, the code is saved in the throttle module. If the network does not work until the next driving cycle, the information may be missing in the ECM. The code can be set together with other fault codes.

Mögliche Ursachen

Loose connections or contact resistance in the connectors to the CAN network
Open circuit in one or both CAN signal cables
One or both CAN signal cables are short-circuited to ground, voltage or each other
Interference on the CAN signal cables
A defective node in the CAN network

Was Sie tun können

1First remedy the CAN network fault codes in the central electronic module (CEM) and the driver information module (DIM), as this code can follow from them
2Check the connectors on the CAN network for loose connections and oxidation, and check the wiring for chafing and damage
3Use a multimeter to check that the two CAN cables are not open-circuit or short-circuited to ground or voltage
4Check the battery condition and charge, as low voltage can make the system relay switch on late. For longer troubleshooting, a battery charger intended for car batteries can keep the voltage stable
5Erase the codes, then reset: ignition off for three minutes, on and off again, then three more minutes. Add two minutes if the electric cooling fan has been running.
6Test drive the car. If the fault returns, ask the workshop whether upgraded software is available for the car, as it has adjustments that make it more tolerant of brief CAN interference

Symptome, die Sie bemerken können5

The accelerator pedal is ignored when the brake pedal is pressed
The cruise control cannot be activated
The idle is uneven and the car jerks during engine braking
The electronic throttle system (ETS) warning lamp lights, on C70 and S/V70 -2000 only
Throttle response is very poor and top speed is reduced, but only together with ECM-9180 or ECM-918F

Was der Fehler beeinflussen kann3

Engine speed is regulated by fuel cut-off, with the injectors switched off one at a time, and the throttle follows the accelerator pedal position
The cruise control is switched off during the driving cycle when the fault was detected, and it works again the next time the car starts if the fault is gone
Together with ECM-9180 or ECM-918F, the throttle module disables throttle motor control, the throttle goes to its mechanical stop position and engine speed is limited

Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.