TRAP fault Class B hardware trap due to invalid memory access
|  | Description
|  | Effects on the driving operation
|  | Possible causes
|  | Place of action
|  | Troubleshooting
|  | Setting conditions of the event
|  | Test conditions of the event
|  | Final function check
|  | See also:
Description The internal logic of the microcontroller in the transmission control reports a so-called 'Class-B Hardware Trap'. Processing of the running program was interrupted. The hardware trap refers to an illegal word access on an odd address: -> Illegal Word Operand Access Flag - ILLOPA. Hardware traps are caused by errors or special system conditions within the microcontroller. There are 'Class A traps' and 'Class B traps'. Effects on the driving operation Reset of the transmission control unit The operating mode may switch to 'forced neutral'. It is no longer possible to engage a gear in that case. Possible causes The software attempts a word access to an odd address. Place of action No description available. Troubleshooting
|  | NOTE The following service work may only be performed by persons who are authorised by the vehicle manufacturer: Loading software and/or datasets into the transmission control unit. Service work at vehicle components which are not included in the VOITH delivery.
Load the latest software version approved for the vehicle. If the fault persists, please consult the VOITH customer service and state the type of fault and the system description of the fault location. Setting conditions of the event No description available. Test conditions of the event No description available. Final function check If the defective component cannot be clearly identified, you should try to reproduce the fault: Reinstall the component in the vehicle. Test the function. After the fault has been eliminated, the following steps have to be carried out: Conduct a test drive with function check. Read out the fault memory. Check the transmission for leaks. Perform a final visual inspection. These steps are necessary to ensure the entire vehicle functions. See also:
|  | Aftersales service index
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