Daewoo CIELO EURO III Manual page 320

1F – 151 ENGINE CONTROLS
Circuit Description
The engine control
module (ECM) supplies a voltage of about 0.45 volts be-
tween terminals M12 and M29 (if mea-
sured with a 10 M : digital voltmeter, this may read as
low as 0.32 volts). The Oxygen Sensor (O2S 1) varies
the voltage within a range of about 1 volt if the exhaust is
rich, down through about 0.10 volts if the exhaust is
lean.
The sensor is like an open circuit and produces no volt-
age when it is below 315 q C (600 q F). An open sensor cir-
cuit or cold sensor causes Open Loop operation.
If the O2S 1 pigtail wiring, connector, or terminal is dam-
aged, the entire O2S 1 assembly must be replaced. Do
not attempt to repair the wiring, connector, or terminals.
In order for the sensor to function properly, it must have
a clean air reference provided to it. This clean air refer-
ence is obtained by way of the O2S 1 wire(s). Any at-
tempt to repair the wires, connector, or terminals could
result in the obstruction of the air reference and degrade
the O2S 1 performance. Refer to "Oxygen Sensor" in
this section.
Conditions for Setting the DTC
O2 sensor voltage is greater than 0.952 volts.
Closed loop stoichometry.
The Engine Coolant Temperature (ECT) is greater
than 60 q C (140 q F).
No related malfunctions. (See P0131)
1.5L SOHC
System volage is greater than 10 volts.
A 3 seconds delay after conditions met.
DIAGNOSTIC TROUBLE CODE (DTC) P0132
OXYGEN SENSOR (O2S 1) HIGH VOLTAGE
Action Taken When the DTC Sets
The Malfunction Indicator Lamp (MIL) will illuminate.
The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Freeze Frame and Failure Records buff-
ers.
A history DTC is stored.
The vehicle will operate in Open Loop.
Conditions for Clearing the MIL/DTC
The MIL will turn off after three (four –
1.5L SOHC) consecutive ignition cycles in which the
diagnostic runs without a fault.
A history DTC will clear after 40 consecutive warm up
cycles without a fault.
DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
The DTC P0132 or rich exhaust is most likely caused by
one of the following items:
Fuel pressure – System will go rich if fuel pressure is too
high. The ECM can compensate for some in-
crease, but if it gets too high, a DTC P0132 will be set.
Leaking injector – A leaking or malfunctioning injector
can cause the system to go rich causing a DTC P0132.
TAA1F180
DAEWOO T-154 BL2,3