P1635

101A01 - P1635

Information saved in
DME

Fault code
101A01 - P1635

Fault text
Throttle valve, continuous adaptation: lower stop not
adapted

Fault description
The diagnostic function monitors whether the lower
mechanical travel stop is reached during the throttle valve
start test.

Condition for fault identification
Test condition:
The fault is recognized when the lower travel stop is not
reached during the start test.
Potential problem source(s):
- Throttle valve operation impaired by contamination
- Defect in wiring harness between throttle-valve actuator
motor and DME
- Defective throttle valve
Terminal condition: Terminal 15
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- Intake air temperature > -10 °C
- Coolant temperature > -10 °C
- Coolant temperature < 142 °C
Time condition:
- 5 sec.
Other conditions:
- Engine off, no convenience start, because start test is then
aborted

Condition for fault memory entry
none

Action in service
- Inspect throttle valve for contamination
- Use tester to reposition throttle valve to lower end of travel
range (0%) and determine whether it reaches the travel stop
(voltages S1:
- 0.5 V and S2: 4.5 V)
- Check wiring harness between DME and throttle valve
- Replace throttle valve

Fault effect and breakdown warning
Breakdown notice:
- The engine reverts to the limp-home mode, continued
driving possible but subject to severe restrictions, stop and
wait for service assistance as soon as possible.
Possible apparent symptoms:
- Power reduction
- Engine speed governed

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

Service instruction
- Diagnosis routine runs at each Terminal 15 status switch
without immediate engine start