Scania MBS DTC 902 A/C compressor relief valve, short circuited

MBS MBS control unit · Scania

Code 902 (decimal). Some diagnostic tools show it in hexadecimal as 0386.

In short

The MBS control unit has detected that the A/C compressor relief valve is short-circuited to earth or battery voltage. The voltage for the pin is outside the permitted value.

Applies to: MBS3 (MBS)

What does Scania MBS fault code 902 mean?

The MBS control unit has detected that the A/C compressor relief valve is short-circuited to earth or battery voltage. The voltage for the pin is outside the permitted value.

What causes Scania DTC 902?

Fault in the cable harness or harness-to-component connector to the valve.

How does the system react?

- The relief valve cannot be controlled. - A yellow warning indication is displayed.

What are the symptoms?

The vehicle performance could be adversely affected on start-up.

How to fix Scania MBS fault code 902?

  1. Check the A/C compressor relief valve.
  2. Check the cable harness and harness-to-component connector for the A/C compressor relief valve.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 902 in other Scania systems

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