1F5020

1F5020 - P0634

Information saved in
DME

Fault code
1F5020 - P0634

Fault text
DME, internal fault, interior-temperature sensor: value too
high

Fault description
The diagnostic function monitors control module
temperature for violation of an upper limit.

Condition for fault identification
Test condition:
The diagnostic fault code is logged when the voltage value
for ECU temperature > 4.9 V.
Potential problem source(s):
- DME defective
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
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
immediately.

Action in service
- Only replace the DME if the fault remains present
continuously or if the fault frequency is greater than 3

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- Loss of power

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: on
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: on

Service instruction
- none