Diagnostic trouble code (DTC) information
Condition
Diagnostic trouble code (DTC) PHM-0004 is stored if the keypad unit/carphone module registers that there is a short-circuit to ground in the MBUS signal.
Possible Source
- Short-circuit to ground in the MBUS signal between the carphone box and the keypad unit/carphone module.
Fault symptom[s]
- The carphone does not function.
- Combined instrument panel message that the carphone is not functioning.