The driver assistance system button malfunction in a 2012 Volkswagen Passat can be a frustrating issue. This guide provides a potential solution based on user experience, focusing on a workaround that involves manipulating the instrument cluster and the car’s electrical system. This problem often surfaces after a battery disconnect.
Instrument Cluster Manipulation Workaround
One effective solution involves a specific procedure with the instrument cluster:
- Turn on electrics: Turn the ignition key to the “on” position without starting the engine. This activates the car’s electrical system.
- Disconnect instrument cluster: Carefully disconnect the instrument cluster connector while the electrical system is on.
- Power cycle: Turn the ignition key to the “off” position and then back to the “on” position, leaving the instrument cluster disconnected.
- Reconnect instrument cluster: Reconnect the instrument cluster connector while the electrical system remains on.
- Turn off and start: Turn the ignition key to the “off” position, then attempt to start the car normally.
This process often resolves the driver assistance button error. However, it’s important to note that this issue may reoccur if the battery is disconnected again, requiring a repeat of the procedure.
Temperature Sensitivity and Additional Observations
Users have reported that the issue seems more prevalent on cooler days or during early morning/late night starts. On warmer days, the car often starts without problems. Furthermore, repeating the workaround multiple times (4-5 attempts) might be necessary in some cases.
Interestingly, warming the Canbus gateway module, potentially by keeping it in a warm place like a pocket for a period, before performing the instrument cluster workaround has also been reported as a helpful step. This suggests a possible temperature-related component malfunction.
Canbus Gateway Replacement
While the workaround provides a temporary fix, replacing the Canbus gateway with a second-hand unit is a potential long-term solution. Although disconnecting the gateway with the battery connected has been done, it’s generally recommended to disconnect the battery first as a safety precaution before disconnecting any modules.
Disclaimer:
This information is based on user experience and should be used for informational purposes only. Consulting a qualified mechanic for diagnosis and repair is always recommended. Disconnecting and reconnecting car parts carries inherent risks, and should be performed with caution and at your own discretion. carw.store is not responsible for any damages or injuries resulting from the application of this information.
