Action in service

Precondition: Engine running

1st step: Read out frequency counter If fault is sporadic: => Delete fault

1st step: Case 1: Frequency <= 3, Fault not active 2nd step: => Delete diagnostic fault code

1st step: Case 2: Frequency > 3 or fault active continuously

2nd step: => Is diagnostic fault code 0x5A57 or 0x5A5B also logged?

2nd step: Case 1: Diagnostic fault code not logged 3rd step: => Delete diagnostic fault code

2nd step: Case 2: Diagnostic fault code logged 3rd step: Control valve PV7 sticks at 0 cooling

=> Replace mechatronic module

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