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RMS Auto-electrics/Diagnostics

73 members • $34/month

2 contributions to RMS Auto-electrics/Diagnostics
A class can bus issue
Hi everybody looking some advice on this w176 a class. So on the dashboard it says airbag light fault and active bonnet malfunction (safety device for a crash). Diagnostic scan done with genuine xentry, scan tool showed no faults for active bonnet malfunction and in the airbag ecu showed a fault for internal fault in airbag ecu. All can bus block connectors show 2.3v and 2.7v apart from this black and white can bus block connector. It shows 2.4v and 2.5v. Scoped the can bus via breakout box at 16 pin obd and it shows in my opinion a bad waveform pattern. Also the carpet was heavily soaked and removed from the car, this canbus connector earth had some green corrosion but cut out and replaced but still no difference. Any ideas where to go next?
0 likes • 2d
@Huw Jenkins I will mate my next step is I’m gonna take front bumper off and check loom round it, it’s all just confusing me about the airbag light also
0 likes • 1d
@Robert Shervill thanks mate strange tho the way active bonnet malfunction on dash but no faults logged on scan tool
0 likes • Mar 16
Daisy chain mate
0 likes • Mar 16
@Robert Shervill used pico and seemed a good Lin signal to me
1-2 of 2
Jonathan Murray
1
5points to level up
@jonathan-murray-2722
work at murray motors, northern ireland for 10 years

Active 11h ago
Joined Jul 1, 2026
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