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The Porsche Cayenne(old type with KESSY box J518 Type) usually have problems like that: when turn on the key, car not start, or show steering column lock failure, or ELV internal fault, as a common fault, here we offer the repair solution as below.
Via measurement, the two relays breakdown, change the two relays, the problems will be solved. The ELV motor also need pay attention, if it’s aging, it will lead to electric current change, finally will damage the circuit board or other components, the following items you may need to repair this problem and test it on bench