3.2.310. SPN 520243, FMI 3, Main relay lamp short circuit to batteryΒΆ

Description

The EEM4 monitoring system has detected short circuit to battery on main relay lamp.

Possible causes are:

  • The main relay lamp wiring is defective. (Short circuit to battery.)
  • The main relay lamp is defective.

Reaction in EEM

The FC is stored and the warning lamp is activated. The CAN message indicates active fault.

Solution

First save the error log and then erase it. Restart the ECU after erasing the error log. If the fault occurs again during the next driving cycle, check the following paths:

  • Check the main relay lamp wiring, the connectors and the contact surfaces of the connector pins (possible oxidation).

The pin numbers at the ECU:

EDC17CV41+      1.83 Ground     (Optional lamp 1)
  • Check the operation with another main relay lamp to see if the lamp is defective.