49DC - P202C (DDE)

49DC - P202C

Information saved in
DDE

Fault code
49DC - P202C

Fault text
DDE: Reducing-agent active-tank heating: maximum heat
output too high

Fault description
Active tank heater power peak monitoring. A short circuit is
recognized when the peak heater power is above a limit
value defined based on operating point, and after the peak
power test has been completed.
The peak power test is terminated when one of the following
conditions is met:
- An activation signal has been transmitted to the heater for
at least 10000 ms.
- When the peak power test has been recognized as
terminated based on the output shift of the heater.

Condition for fault identification
Test condition:
The error check runs once the peak power test has been
completed.
Voltage condition:
The error check runs once the peak power test has been
completed.

Condition for fault memory entry
Event debounced (1)

Action in service
1. Check resistance of heater elements.
2. Check heater wires for short circuits to ground.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
Measure the resistance of the active tank's heating system at
the power switch: Specified readings: 1.5 - 2.4 ohms