P1631

107A81 - P1631

Information saved in
DME

Fault code
107A81 - P1631

Fault text
Throttle-valve actuator, closing 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 within the specified period.

Condition for fault identification
Test condition:
The fault is recognized when the throttle valve fails to
achieve an effective aperture of roughly 30% within 140 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