4120 - P0685 (DDE)

4120 - P0685

Information saved in
DDE

Fault code
4120 - P0685

Fault text
DDE: DDE main relay: Relay deactivates too late

Fault description
Error opening main relay. Response is monitored to
determine whether the main relay is sticking.
The relay is recognized as sticking when the battery voltage
following the command to open the main relay and the
elapsed lag time 100 ms are greater than the threshold
MRly_uStkRlyBattThr_C.

Condition for fault identification
Test condition:
The main relay diagnosis to check for a sticking relay is
executed when a command to open the relay is present.
Voltage condition:
The main relay diagnosis to check for a sticking relay is
executed when a command to open the relay is present.

Condition for fault memory entry
-None.

Action in service
Replace the DDE main relay.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none