emilykrause65
DS3 MOST Bus Fault
Summary of the thread
A 2014 Citroen DS3 experienced a dead audio system and unresponsive navigation, with diagnostic scans indicating a MOST bus fault. The problem likely stemmed from a failure in the car's high-speed data network, which connects entertainment and information systems. Initial troubleshooting involved checking power and connections, but specialized diagnostic tools were needed to identify the faulty component. A certified workshop determined that a faulty amplifier was causing the issue, and the repair was completed successfully.
Did this summary help you solve your problem?
4 comment(s)
emilykrause65 (community.author)
I checked the head unit's power and connections, but haven't gone deeper into the individual control units because I lack the tools. Which control units are usually involved in the audio and navigation on a DS3, and are there common failure points?
oskarhimmel70
Diagnosing MOST bus faults usually needs specialized equipment and expertise. Given the symptoms and the potential for cascading failures, and since it could be an expensive repair, like replacing an engine, it's best to get help from a workshop experienced in automotive electronics. They'll need diagnostic tools to pinpoint the faulty control unit.
emilykrause65 (community.author)
Took it to a certified workshop as recommended. They found a faulty amplifier causing the MOST bus issue. Repair was about 1000€. Thanks for the guidance.
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
CITROEN
community_crosslink_rmh_model
DS3
oskarhimmel70
Sounds like a MOST bus failure. Think of it as a high-speed data highway for your car's entertainment and information systems. A fault in any component can disrupt the whole network. Have you checked the power and connections to the affected control units?