Daewoo MATIZ Service Manual page 174

1F – 76 ENGINE CONTROLS
THROTTLE POSITION SENSOR LOW VOLTAGE
Circuit Description
The Engine Control Module (ECM) supplies a 5 volt ref-
erence voltage signal and a ground to the Throttle Posi-
tion (TP) sensor. The TP sensor sends a voltage signal
back to the ECM relative to the throttle plate opening.
The voltage signal will vary from approximately 0.33
volts at closed throttle, to over 4.3 volts at Wide Open
Throttle (WOT).
The TP signal is used by the ECM for fuel control and for
most of the ECM controlled outputs. The TP signal is
one of the most important inputs used by the ECM for
fuel control and most of the ECM controlled outputs.
Conditions for Setting the DTC
D TP sensor voltage indicates a throttle voltage less
than 0.14 volts.
Action Taken When the DTC Sets
D The Malfunction Indicator Lamp (MIL) will illuminate.
D The ECM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and Failure Records buffers.
DIAGNOSTIC TROUBLE CODE (DTC) P0122
D A history DTC is stored.
D The TP angle will default to 0% when the vehicle
speed is less than 3 km/h (2 mph) and 10% when the
vehicle speed is greater than 3 km/h (2 mph). The
scan tool will not display the default value.
Conditions for Clearing the MIL/DTC
D The MIL will turn off after four consecutive ignition
cycles in which the diagnostic runs without a fault.
D A history DTC will clear after 40 consecutive warm-up
cycles without a fault.
D DTC(s) can be cleared by using the scan tool.
D Disconnecting the ECM battery feed for more than 10
seconds.
Diagnostic Aids
If the DTC P0122 cannot be duplicated, the information
included in the Freeze Frame data can be useful. Use a
scan tool information data to determine the status of the
DTC. If the dc occurs intermittently, using the Diagnostic
table may help isolate the problem.
MAA1F120
DAEWOO M-150 BL2