P10DA

4603 - P10DA

Information saved in
DDE

Fault code
4603 - P10DA

Fault text
DDE: Reducing agent, output of feed line heater too low:
Open circuit, heater circuit

Fault description
Starting with 03/2010 the heating units for the delivery
module and the heating systems are activated consecutively
with a 500 ms delay. This results in two spikes in the lead
value. The error is recognized when the second spike in the
lead value is below the limit 0 1/Ohm.

Condition for fault identification
Test condition:
This error is checked once in each heating cycle when a lead
value stroke has been detected or 2 seconds have elapsed
since initial heater activation.
Voltage condition:
This error is checked once in each heating cycle when a lead
value stroke has been detected or 2 seconds have elapsed
since initial heater activation.

Condition for fault memory entry
Event debounced (1)

Action in service
1. If the DTC 45F1 also appears: Replace power switch.
2. Repair sources of electrical tracking and arcing (moisture
in the wiring or plug connections).
3. Check the resistance in the metering line heating system.
4. Replace power switch.
5. Replace the metering line.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
Resistance in the metering line heating system:
E70: 3.8 - 4.4 ohms
E90: 1.5 - 1.7 ohms