Engine Data Display Table Definitions - Daewoo CIELO EURO III Manual

1F – 6 ENGINE CONTROLS
Parameter
Fuel Pump Command
Closed Loop
Throttle At Idle
O2 Ready (B1–S1)
Knock Present
Fan Low
Fan High
Park/Neutral (Only AT)
Fuel Level Input
Fuel Level Output
Fuel Trim Cell
G–Sensor
Engine Runtime
* Condition: Warmed up, idle, park or neutral, A/C off
ENGINE DATA DISPLAY TABLE
DEFINITIONS
ECM Data Description
The following information will assist in diagnosing emis-
sion or driveability problems. A first technician can view
the displays while the vehicle is being driven by second
technician. Refer to Powertrain On-Board Diagnostic
(EOBD) System Check for addition information.
A/C Clutch
The A/C Relay represents the commanded state of the
A/C clutch control relay. The A/C clutch should be en-
gaged when the scan tool displays ON.
A/C Pressure
The A/C High Side displays the pressure value of the
A/C refrigerant pressure sensor. The A/C High Side
helps to diagnose the diagnostic trouble code (DTC)
P0533.
A/C Request
The A/C Request represents whether the air condition-
ing is being requested from the HVAC selector. The in-
put is received by the instrument panel cluster and then
sent serial data to the ECM and finally to the scan
tool over KWP 2000 serial data.
Air Fuel Ratio
The Air Fuel Ration indicates the air to fuel ratio based
on the Oxygen Sensor (O2S 1) inputs. The ECM
uses the fuel trims to adjust fueling in order to attempt to
maintain an air fuel ratio of 14.7:1.
SCAN TOOL DATA TABLE (Cont'd)
Scaling
On/Off
Yes/No
Yes/No
Yes/No
Yes/No
On/Off
On/Off
P/N and R/N/D
V
%
–
V
HH:MM:SS
1.1 – 3.7 V (Non–ABS Only)
Hours:Minutes:Seconds
BARO
The Barometric Pressure (BARO) sensor measures the
change in the intake manifold pressure which results
from altitude changes. This value is updated at ignition
ON and also at Wide Open Throttle (WOT).
Base Injection PWM
Indicates the base Pulse Width Modulation (PWM) or
ON time of the indicated cylinder injector in milliseconds.
When the engine load is increased, the injector pulse
width will increase.
Calculated Air Flow
The calculated air flow is a calculation based on man-
ifold absolute pressure. The calculation is used in sever-
al diagnostics to determine when to run the diagnostics.
Desired Idle Speed
The ECM commands the idle speed. The
ECM compensates for various engine loads in order to
maintain the desired idle speed. The actual engine
speed should remain close to the desired idle under the
various engine loads with the engine idling.
Engine Coolant Temperature
The Engine Coolant Temperature (ECT) sensor sends
engine temperature information to the ECM. The
ECM supplies 5 volts to the engine coolant tem-
perature sensor circuit. The sensor is a thermistor which
changes internal resistance as temperature changes.
When the sensor is cold (internal resistance high), the
ECM monitors a high voltage which it interprets as
a cold engine. As the sensor warms (internal resistance
Value
On
Yes
No
Yes
No
On/Off
On/Off
P/N
varies
varies
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DAEWOO T-154 BL2,3