P16BC

101408 - P16BC

Information saved in
DME

Fault code
101408 - P16BC

Fault text
Throttle valve, adaptation: Initial adaptation, lower limit
position not taught in

Fault description
The diagnostic function monitors the throttle valve to
determine whether it reaches the lower mechanical travel
stop (UMA) during a repeat throttle-valve adaptation routine
(after roughly 30 sec. Terminal 15 without engine start).

Condition for fault identification
Test condition:
The fault is recognized when the limits specified for the
signal voltages (sensor 1 signal voltage < 0.27 V, sensor 2 >
4.73 V) are violated during the repeat adaptation routine
(roughly 30 sec. at Terminal 15 without engine start) or the
mutual deviation between the sum voltages for sensors 1 and
2 of 5 V is more than X V.
Potential problem source(s):
- Fault during repeat initialization attempt; lower mechanical
travel limit range violation:; 1.a. Travel stop dirty,
1.b. Foreign object/matter
1.c. Sporadic contact resistance
1.d. Defective throttle valve
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
1. Clear ECU fault memory? Ignition off? Ignition on for at
least 1 minute
2. If fault remains:
2.a. Check wiring harness DME - throttle valve (sum of
throttle-valve voltages must equal 5 V)
2.b. Check to determine whether foreign objects/matter in
the intake manifold or at the throttle valve are preventing the
throttle valve from closing
2.c. Completely close the throttle valve by hand and
measures the voltages on the two sensors (S1: 0.5 V +/-
tolerance, S2: 4.5 V +/- tolerance)
3. Replace throttle valve

Fault effect and breakdown warning
Breakdown notice:
Ability to continue driving is restricted because engine
speed is limited to roughly 1300 rpm.
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