46C9 - P20C0 (DDE)

46C9 - P20C0

Information saved in
DDE

Fault code
46C9 - P20C0

Fault text
DDE: Reducing-agent pressure-line heating, activation:
Short circuit to positive

Fault description
The DDE recognizes short circuit to B+ error in the output
stage:
Reduction agent pressure line heating

Condition for fault identification
Test condition:
The check frequency depends on the process sequence
control.
Voltage condition:
The check frequency depends on the process sequence
control.

Condition for fault memory entry
Debounce (1000 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
3. Use diagnostic system to activate the heater.
4. Replace power switch.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
Heater circuit 2 is for the metering wire and delivery
module.