Engine Controls System: 138701

138701 - P304D

Information saved in
DME

Fault code
138701 - P304D

Fault text
Radiator shutter, top, upper stop: detected too early

Fault description
The diagnostic function monitors the radiator vent slats to
confirm freedom of motion.

Condition for fault identification
Test condition:
The fault is recognized when it is not possible to progress
through a specific rotational angle.
Potential problem source(s):
- Radiator vent slats physically seized (dirt, ice, snow, etc.)
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- 6 sec. over 30 km/h
Other conditions:
- None

Condition for fault memory entry
This fault is logged in the control module's fault memory
immediately.

Action in service
- Check radiator vent slat assembly for travel resistance
(perform system test)
- Examine the diagnostic fault code: If the temperature was
less than 0 °C when the fault was logged, ice may have been
present: Examine the diagnostic fault code: If the vehicle
speed was > 150 km/h, wind resistance may be the problem
source

Fault effect and breakdown warning
Breakdown notice:
Radiator vent slats can be opened by hand
Possible apparent symptoms:
- The engine may overheat.

Driver information
Warning light:
- ECE emissions warning lamp: off
- ECE electronic engine power reduction: off
- CC message: none
- US emissions warning lamp: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
None