Engine Controls System: 101402

101402 - P1633

Information saved in
DME

Fault code
101402 - P1633

Fault text
Throttle valve, adaptation: emergency running position not
adapted

Fault description
The diagnostic function monitors the throttle valve to
determine whether it is at the emergency air position (open
at angle of roughly 7.6�) when no voltage is applied.

Condition for fault identification
Test condition:
The fault is recognized when the values for the emergency
air point are determined to be less than 1.8% or larger than
16% during the adaptation process.
Potential problem source(s):
- Defect in wiring harness between throttle-valve actuator
motor and DME
- Dirt/contamination on throttle valve
- Throttle valve seized in open or fully-closed position
- Defective throttle-valve actuator motor
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- Engine warmed to normal temp, above 80 °C
Time condition:
- 30 sec. after Terminal 15 on
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
- Determine whether throttle valve is open to an aperture of
roughly 8� (almost closed) when no voltage is applied,
check measured data in tester (sensor 1 and 2 voltage,
throttle-valve angle)
- Visual inspection of throttle valve and air-induction system
for contamination
- Check wiring harness between DME and throttle valve
- 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