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DTC › MCC3 MCC3 / A029

12V supply to LIN nodes (C8063) is short circuit to battery or open load.

â–¶ How to fix

Check the cable harness.

What you'll see

No driver-visible symptom recorded.

System reaction

If the cable harness is open load, components connected to the LIN bus (C8061) will not function.

Diagnostic depth

Detection

The supply voltage is measured by the climate control system (E17). Open load is only detected when the supply is activated. Short circuit to battery might or might not be detected when the supply is activated, but will always be detected when the supply is inactivated.The DTC can also be set if there is a short dip in the general supply.

Possible cause

1. The supply cable harness is open, or 2. The supply cable harness is short circuit to battery.

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