Hei, og du har slettet de gamle feilkodene?
Tipper på at det er kabelfeil inne i bilen eventuelt gjennomføring til/i motorrom, om det ikke er feil på den nye sensoren. (glem B-tema, ta like godt en brukt sensor fra huggeriet om du ikke vil betale nypris hos Volvo)
Normalt sett er det jo hjullageret som skaper trøbbel (9 av 10).
Prøv en annen original-sensor, og det er selvfølgelig kjekt å ha mulighet til å sjekke hjulhastighet med tilpasset diagnoseutstyr.
(den gamle sensoren kan kanskje testes på andre siden av bilen?)
Måle kabelsløyfe fra
BCM
til kontakten under baksete,
(kortslutt en ende, mål motstand i sløyfen, ohm også mot pluss og jord, med batteriet bortkoblet selvfølgelig)
Deretter vurder å kryssbytt sensorkablene fra hvert bakhjul på kontakten til
BCM
(eventuelt gjør krysskoblinger under baksetene, om kabelsløyfen var ok) for å se om feilen flytter seg til andre siden, eller fremdeles registreres på samme hjul. (Misstanken rettes mot
BCM
)
Litt mer info på feilkodene:
BCM
-0040:
The brake control module (
BCM
) receives information about wheel speed from the wheel sensors. The wheel sensors, which are on the wheel mounting, read off a magnetic pulse wheel on the wheel spindle. Diagnostic trouble code (DTC)
BCM
-0010,
BCM
-0020,
BCM
-0030 or
BCM
-0040 is stored, depending on the wheel sensor, if the brake control module (
BCM
) registers that the signal from any wheel sensor is below 4.5 mA ± 10% or above 20 mA ± 10%.
BCM
-0010: Wheel sensor, left front
BCM
-0020: Wheel sensor, right front
BCM
-0030: Wheel sensor, left rear
BCM
-0040: Wheel sensor, right rear. The diagnostic trouble codes (DTCs) can be diagnosed when the ignition is switched on.
Årsak:
Contact resistance in the terminals
Open-circuit, short-circuit to ground or supply voltage in the power supply to the wheel sensor
The signal cables are short-circuited to each other
Short-circuit to supply voltage or ground in the signal cable
Open-circuit in the signal cable
A wheel sensor is not working
Internal fault in the brake control module (
BCM
).
BCM
-0041:
For the diagnostic trouble codes (DTCs)
BCM
-0011 (wheel sensor left front),
BCM
-0021 (wheel sensor right front),
BCM
-0031 (wheel sensor left rear) and
BCM
-0041 (wheel sensor right rear), the brake control module (
BCM
) can register mechanical faults as follows: Feasibility assessment by comparing the difference in speed between the wheel with the lowest speed and the wheel with the highest speed Feasibility assessment by comparing the difference in speed between the wheel with the lowest speed and the wheel with the next lowest speed Feasibility assessment by comparing the appearance of the signals from each wheel sensor in order to detect implausible rises in the signal value Feasibility assessment by comparing the reduction in pressure on each wheel during
ABS
control. The diagnostic trouble codes (DTCs) can be diagnosed to varying degrees depending on which assessment method is being employed. In general, you must drive at more than 20 km/h for approximately 2 minutes and perform a number of
ABS
controls.
Årsak:
One of the wheels has been blocked while the car has being driven
Loose wheel sensor
The gap between the wheel sensor and the pulse wheel is too large or too small
Hub vibrations or play in the wheel bearings
Defect in the pulse wheel
A wheel sensor is not working.
Dirt between wheel sensor and pulse wheel.