Daewoo CIELO EURO III Manual page 498

1F – 328 ENGINE CONTROLS
Circuit Description
Vehicle speed information is provided to the
engine control module (ECM) by
the Vehicle Speed Sensor (VSS). The VSS is a perma-
nent magnet generator that is mounted in the transaxle
and produces a pulsing voltage whenever vehicle speed
is over 3 mph (5 km/h). The A/C voltage level and the
number of pulses increases with vehicle speed. The
ECM converts the pulsing voltage into mph (km/h)
and than supplies the necessary signal to the instrument
panel for speedometer/ odometer operation and to the
cruise control module and multi-function alarm module
operation. This Diagnostic Trouble Code (DTC) will de-
tect if vehicle speed is reasonable according to engine
rpm and load.
DIAGNOSTIC TROUBLE CODE (DTC) P0502
VEHICLE SPEED NO SIGNAL (M/T ONLY)
Conditions for Setting the DTC
D DTC(s) P0106, P0107, P0108, P0117, P0118,
P0122, P0123,
S P0123, P0201, P0202, P0203,
P0204, P0300, P0351, P0352, P0402, P0404,
P0405, P0406 are not set.
D Engine running.
D Ignition voltage is between 11 and 16 volts.
D Coolant temperature is greater than 60_C (140_F).
1.5L SOHC
Power Test
D Indicated vehicle speed is less than 3.1 mph (5 km/h).
D Engine load is greater than 60 kPa.
TAA1F370
P0125
DAEWOO T-154 BL2,3