Manufacturer Code Charts: 200504

200504 - P1603

Information saved in
DME

Fault code
200504 - P1603

Fault text
DME, internal fault, monitoring external torque request:
transmit signals implausible

Fault description
The diagnostic function monitors internal operations within
the control module to confirm that they are executed
correctly, here the focus is on CAN signals transmitted by
the DME.

Condition for fault identification
Test condition:
The fault is recognized when an internal comparison detects
excessively high deviations.
Potential problem source(s):
- Collateral fault from CAN
- Defective DME
Terminal condition: Terminal 15
Voltage condition:
- None
Temperature condition:
- None
Time condition:
- None
Other conditions:
- none

Condition for fault memory entry
This fault is logged in the control module's fault memory if
it remains present for longer than 0.5 sec.

Action in service
- If diagnostic fault codes related to the CAN are logged,
repair these faults first
- If the diagnostic fault code has been entered with a
frequency > 3, then replace the DME

Fault effect and breakdown warning
Breakdown notice:
- Allow vehicle to enter sleep mode, then restart may resolve
the problem, although the remedy may only be temporary
Possible apparent symptoms:
- DSC lamps light up, etc., cruise control/DSC are not
operational

Driver information
Warning light:
- ECE emissions warning lamp: off
- US emissions warning lamp: off
- ECE electronic engine power reduction: off
- US electronic engine power reduction: off
- CC message: MIL OFF EML OFF CC: ???

Service instruction
- Wait for bus activity to subside and restart as indicated.