VOLVO
ECM-902B - Communication with throttle unit. Signal too high
System
Motorsteuergerät (ECM)
Volvo-Modelle, für die dieser Fehlercode gilt
Dieser Fehlercode hat je nach Modell, Modelljahr oder Motor unterschiedliche Bedeutungen. Wählen Sie die Bedeutung, die für Ihr Fahrzeug gilt.
Gilt für folgende Modelle:
7 ModelleC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008)
Modelle nach Baujahr und Motor anzeigen (20)
- Volvo C70 Cabriolet (1998–2005)2000Nur Motor: B5244S
- Volvo C70 Coupé (1998–2002)1999Nur Motor: B5254S DENSO
- Volvo C70 Coupé (1998–2002)2000Nur Motor: B5244S
- Volvo S60 (2001–2009)2001Nur Motor: B5244S, B5244S2
- Volvo S60 (2001–2009)2002Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S60 (2001–2009)2003–2005Nur Motor: B5244SG, B5244SG2
- Volvo S60 (2001–2009)2006–2008Nur Motor: B5244SG
- Volvo S70 (1997–2000)1999Nur Motor: B5254S DENSO
- Volvo S70 (1997–2000)2000Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)2000Nur Motor: B5244S, B5244S2
- Volvo S80 (1999–2006)2001Nur Motor: B5244S, B5244S2, B5244SG
- Volvo S80 (1999–2006)2002Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo S80 (1999–2006)2003–2005Nur Motor: B5244SG, B5244SG2
- Volvo S80 (1999–2006)2006Nur Motor: B5244SG
- Volvo V70 (1997–2000)1999Nur Motor: B5254S DENSO
- Volvo V70 (1997–2000)2000Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2001Nur Motor: B5244S, B5244S2, B5244SG
- Volvo V70 (2000–2008)2002Nur Motor: B5244S, B5244S2, B5244SG, B5244SG2
- Volvo V70 (2000–2008)2003–2005Nur Motor: B5244SG, B5244SG2
- Volvo V70 (2000–2008)2006–2008Nur Motor: B5244SG
Was bedeutet der Fehlercode?
The ECM has not received any CAN signal from the throttle module after start, even though the engine runs at a sufficiently high speed. This variant therefore concerns communication after start. The code can be set together with other codes, which should then be read out at the same time.
Mögliche Ursachen
- Delayed engagement of the system relay when the ignition is switched on
- The voltage supply to the throttle module is too high when the ignition is switched on
- Interference on the CAN wiring
- Defective CAN wiring
- A damaged control module in the CAN network
Was Sie tun können
- 1Check that the system relay engages in time at start and that the throttle module gets the correct voltage, since a delayed engagement can cause this code
- 2Check the CAN wiring for damage and measure that it has no break or short to ground or voltage
- 3Check the CAN connectors for contact resistance and oxidation
- 4Read the CAN codes in the other control modules first and trace them; the reconfiguration does not show the root cause
- 5If you have diagnostic equipment, read the throttle signals in live data during start-up and a road test and see whether they drop out
- 6If the fault remains, have a workshop check the control modules in the CAN network
Symptome, die Sie bemerken können5
- The accelerator pedal is ignored when braking
- Cruise control cannot be engaged
- Uneven idle
- Jerking during engine braking
- The electronic throttle system warning lamp is on for the C70 and for the S/V70 up to the year 2000
Was der Fehler beeinflussen kann3
- The throttle and accelerator pedal behave as if they were mechanically linked
- Fuel cut-off always follows the pedal position during the reconfiguration
- Cruise control is switched off during the driving cycle in which the fault was detected, and it returns at the next start if the fault has gone
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.