P1628

107A91 - P1628

Information saved in
DME

Fault code
107A91 - P1628

Fault text
Throttle-valve actuator, opening spring check: error during
spring check

Fault description
During the spring test the diagnostic function monitors the
throttle valve to determine whether it reaches the specified
position below the emergency-air point within the specified
time.

Condition for fault identification
Test condition:
The diagnostic fault code is logged when the throttle valve
fails to reach a position of less than 2.5 % and more than 0.4
% opening within 300 ms.
Potential problem source(s):
- Stiction in throttle valve
- Return spring defective
- Defect in wiring harness between throttle-valve actuator
motor and DME
- Defective throttle-valve actuator motor
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- Engine on
- Vehicle velocity = 0 km/h

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

Action in service
- Check wiring harness between DME and throttle valve
- Use tester to activate throttle valve and observe its reaction
- Check throttle valve for contamination and foreign objects
- Move throttle valve by hand, checking for resistance to
motion and noting how quickly it closes when released
- Replace throttle-valve actuator motor

Fault effect and breakdown warning
Breakdown notice:
- It is possible to continue driving the vehicle, but passing
maneuvers should not be attempted owing to the reduction
in engine output.
Possible apparent symptoms:
- Reduced power

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

Service instruction
none