1F – 10IENGINE CONTROLS
DAEWOO V–121 BL4
TEC Display Table
At idle / Upper Radiator / Closed Throttle / Park or Neutral / Closed loop / Acc. OFF
Scan Tool Parameter Units Displayed Typical Data
Engine Speed RPM µ100 rpm from the Desired RPM
TP Angle % 0 (up to 100% at wide open throttle)
Engine Coolant Temperature C,F 85³–115³C (185³–239³F) Varies
with the coolant temperature
Intake Air Temperature C,F 10³–80³C(50³–176³F) Varies with
the underhood temperature
Cam Active Counter Counts 0–255
Spark Degrees Varies
MAP kPa 25–35 kPa
Vehicle Speed mph 0
Decel Fuel Mode Yes/No –
Power Enrichment Mode Yes/No –
Injector Pulse Bank 1 mS Varies
Crank Error Latched Yes/No –
Sum Out Of Range Yes/No –
Opposing Factor Out Of Range Yes/No –
Factor Out Of Range Yes/No –
Enable Criteria Not Met Yes/No –
Cat Damaging Misfire Yes/No –
Test is Running Yes/No –
Learned This Key Cycle Yes/No –
Attempts to Learn Counts
ENGINE DATA DISPLAY TABLE
DEFINITIONS
PCM/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
(OBD II) System Check for additional 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 conditioning
is being requested from the HVAC selector. The input is re-
ceived by the instrument panel cluster and then sent over
universal asynchronous receiver transmitter (UART) seri-
al data to the powertrain control module (PCM)/engine
control module (ECM) and finally to the scan tool over
class 2 serial data.
Air Fuel Ratio
The Air Fuel Ration indicates the air to fuel ratio based on
the Oxygen Sensor (O2S 1) inputs. The PCM/ECM uses
the fuel trims to adjust fueling in order to attempt to main-
tain an air fuel ratio of 14.7:1.
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).
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