2004 DAEWOO NUBIRA Service Repair Manual

rear entertainment sunroof trunk release sat nav cooling transmission oil

Page 777 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual ENGINE CONTROLS 1F – 531
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1114
ENGINE COOLANT TEMPERATURE INTERMITTENT LOW
VOLTAGE
Circuit Description
The Engine Coolant Temperature sensor (ECT) i

ENGINE CONTROLS 1F – 531
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1114
ENGINE COOLANT TEMPERATURE INTERMITTENT LOW
VOLTAGE
Circuit Description
The Engine Coolant Temperature sensor (ECT) is a
thermistor mounted in the engine coolant stream. The En-
gine control Module (ECM) applies 5 volt reference volt-
age through a pull–up resistor to the ECT signal circuit.
When the engine coolant is cold, the sensor resistance is
high, and the ECM will monitor a high signal voltage. As
the engine coolant warms, the sensor resistance is less,
and the ECT signal voltage measured at the ECM drops.
With a fully warmed engine, the ECT signal voltage should
measure about 1.5 to 2.0 volts. If the ECM detects an ECT
signal that is intermittently below the range of the ECT
sensor, Diagnostic Trouble Code (DTC) P1114 will set.
Conditions for Setting the DTC
S ECT is less than 149°C (300°F).
S Engine has been running for over 60 seconds.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will store conditions which were present
when the DTC set as Failure Records data only.
This information will not be stored as Freeze Frame
data.
S A history DTC is stored.
Conditions for Clearing the MIL/DTC
S A history DTC will clear after 40 consecutive warm–
up cycles without a fault.
S DTC(s) can be cleared by using the scan tool.
S Disconnecting the ECM battery feed for more than
10 seconds.Diagnostic Aids
Check for the following conditions:
S Poor connection at the ECM. Inspect harness con-
nectors for backed–out terminals, improper mating,
broken locks, improperly formed or damaged termi-
nals, and poor terminal–to–wire connection.
S Damaged harness. Inspect the wiring harness for
damage. If the harness appears to be OK, observe
the ECT display on the scan tool while moving con-
nectors and wiring harnesses related to the ECT
sensor. A change in the ECT display will indicate
the location of the fault.
S Reviewing the Fail Records vehicle mileage since
the diagnostic test last failed may help determine
how often the condition that caused the DTC to be
set occurs. This may assist in diagnosing the condi-
tion.
S Use the Temperature vs. Resistance Values table
to evaluate the possibility of a skewed sensor. Re-
fer to ”Temperature vs. Resistance” in this section.
Test Description
Number(s) below refer to the step number(s) on the Diag-
nostic Table.
1. The On–Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure re-
cords data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference

Page 778 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 1F – 532IENGINE CONTROLS
DAEWOO V–121 BL4
Engine Coolant Temperature Sensor (Temperature Vs. Resistance
Value)
°C°FOHMS°C°FOHMS
10021217715594450
801763325417280
60140667–52312300
4511 31188

Page 779 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual ENGINE CONTROLS 1F – 533
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1115
ENGINE COOLANT TEMPERATURE INTERMITTENT HIGH
VOLTAGE
Circuit Description
The Engine Coolant Temperature sensor (ECT)

ENGINE CONTROLS 1F – 533
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1115
ENGINE COOLANT TEMPERATURE INTERMITTENT HIGH
VOLTAGE
Circuit Description
The Engine Coolant Temperature sensor (ECT) is a
thermistor mounted in the engine coolant stream. The En-
gine control Module (ECM) applies 5 volt reference volt-
age through a pull–up resistor to the ECT signal circuit.
When the engine coolant is cold, the sensor resistance is
high, and the ECM will monitor a high signal voltage. As
the engine coolant warms, the sensor resistance is less,
and the ECT signal voltage measured at the ECM drops.
With a fully warmed engine, the ECT signal voltage should
measure about 1.5 to 2.0 volts. If the ECM detects an ECT
signal that is intermittently above the range of the ECT
sensor, Diagnostic Trouble Code (DTC) P1115 will set.
Conditions for Setting the DTC
S ECT is less than –38°C (–36°F).
S Engine has been running for over 90 seconds.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will store conditions which were present
when the DTC set as Failure Records data only.
This information will not be stored as Freeze Frame
data.
S A history DTC is stored.
Conditions for Clearing the MIL/DTC
S A history DTC will clear after 40 consecutive warm–
up cycles without a fault.
S DTC(s) can be cleared by using the scan tool.
S Disconnecting the ECM battery feed for more than
10 seconds.Diagnostic Aids
Check for the following conditions:
S Poor connection at the ECM. Inspect harness con-
nectors for backed–out terminals, improper mating,
broken locks, improperly formed or damaged termi-
nals, and poor terminal–to–wire connection.
S Damaged harness. Inspect the wiring harness for
damage. If the harness appears to be OK, observe
the ECT display on the scan tool while moving con-
nectors and wiring harnesses related to the ECT
sensor. A change in the ECT display will indicate
the location of the fault.
S Reviewing the Fail Records vehicle mileage since
the diagnostic test last failed may help determine
how often the condition that caused the DTC to be
set occurs. This may assist in diagnosing the condi-
tion.
S Use the Temperature vs. Resistance Values table
to evaluate the possibility of a skewed sensor. Re-
fer to ”Temperature vs. Resistance” in this section.
Test Description
Number(s) below refer to the step number(s) on the Diag-
nostic Table.
1. The On–Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure re-
cords data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.

Page 780 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 1F – 534IENGINE CONTROLS
DAEWOO V–121 BL4
DTC P1115 – Engine Coolant Temperature Intermittent High
Voltage
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the

Page 781 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual ENGINE CONTROLS 1F – 535
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1121
THROTTLE POSITION SENSOR INTERMITTENT HIGH
VOLTAGE
Circuit Description
The Throttle Position (TP) sensor circuit prov

ENGINE CONTROLS 1F – 535
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1121
THROTTLE POSITION SENSOR INTERMITTENT HIGH
VOLTAGE
Circuit Description
The Throttle Position (TP) sensor circuit provides a volt-
age signal that changes relative to throttle blade angle.
The TP sensor sends a voltage signal back to the Engine
Control Module (ECM) relative to the throttle plate open-
ing. 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 con-
trol and most of the ECM controlled outputs. If the ECM
detects a TP signal that is intermittently above the range
of the TP sensor, Diagnostic Trouble Code (DTC) P1121
will be set.
Conditions for Setting the DTC
S TP sensor voltage indicates a throttle voltage inter-
mittently greater than 4.9 volts.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will store conditions which were present
when the DTC set as Failure Records data only.
This information will not be stored as Freeze Frame
data.
S A history DTC is stored.
Conditions for Clearing the MIL/DTC
S A history will clear after 40 consecutive warm–up
cycles in which the diagnostic runs without a fault.S DTC(s) can be cleared by using the scan tool.
S Disconnecting the ECM battery feed for more than
10 seconds.
Diagnostic Aids
Check for the following conditions:
S Poor connection at the ECM. Inspect harness con-
nectors for backed–out terminals, improper mating,
broken locks, improperly formed or damaged termi-
nals, and poor terminal–to–wire connection.
S Damaged harness. Inspect the wiring harness for
damage. If the harness appears OK, observe the
throttle position display on the scan tool while mov-
ing connectors and wiring harnesses related to the
TP sensor. A change in the display will indicate the
location of the fault.
If DTC P1121 cannot be duplicated, reviewing the Fail Re-
cords vehicle mileage since the diagnostic test last failed
may help determine how often the condition that caused
the DTC to be set occurs. This may assist in diagnosing
the condition.
Test Description
Number(s) below refer to the step number(s) on the Diag-
nostic Table.
1. The On–Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure re-
cords data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.

Page 782 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 1F – 536IENGINE CONTROLS
DAEWOO V–121 BL4
DTC P1121 – Throttle Position Sensor Intermittent High Voltage
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the ch

Page 783 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual ENGINE CONTROLS 1F – 537
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1122
THROTTLE POSITION SENSOR INTERMITTENT LOW
VOLTAGE
Circuit Description
The Throttle Position (TP) sensor circuit provi

ENGINE CONTROLS 1F – 537
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1122
THROTTLE POSITION SENSOR INTERMITTENT LOW
VOLTAGE
Circuit Description
The Throttle Position (TP) sensor circuit provides a volt-
age signal that changes relative to throttle blade angle.
The TP sensor sends a voltage signal back to the Engine
Control Module (ECM) relative to the throttle plate open-
ing. 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 con-
trol and most of the ECM controlled outputs. If the ECM
detects a TP signal that is intermittently above the range
of the TP sensor, Diagnostic Trouble Code (DTC) P1122
will be set.
Conditions for Setting the DTC
S TP sensor voltage indicates a throttle voltage inter-
mittently less than 0.14 volts.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will store conditions which were present
when the DTC set as Failure Records data only.
This information will not be stored as Freeze Frame
data.
S A history DTC is stored.
Conditions for Clearing the MIL/DTC
S A history will clear after 40 consecutive warm–up
cycles in which the diagnostic runs without a fault.S DTC(s) can be cleared by using the scan tool.
S Disconnecting the ECM battery feed for more than
10 seconds.
Diagnostic Aids
Check for the following conditions:
S Poor connection at the ECM. Inspect harness con-
nectors for backed–out terminals, improper mating,
broken locks, improperly formed or damaged termi-
nals, and poor terminal–to–wire connection.
S Damaged harness. Inspect the wiring harness for
damage. If the harness appears OK, observe the
throttle position display on the scan tool while mov-
ing connectors and wiring harnesses related to the
TP sensor. A change in the display will indicate the
location of the fault.
If DTC P1122 cannot be duplicated, reviewing the Fail Re-
cords vehicle mileage since the diagnostic test last failed
may help determine how often the condition that caused
the DTC to be set occurs. This may assist in diagnosing
the condition.
Test Description
Number(s) below refer to the step number(s) on the Diag-
nostic Table.
1. The On–Board Diagnostic (EOBD) System Check
prompts the technician to complete some basic
checks and store the freeze frame and failure re-
cords data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.

Page 784 of 2643

DAEWOO NUBIRA 2004 Service Repair Manual 1F – 538IENGINE CONTROLS
DAEWOO V–121 BL4
DTC P1122 – Throttle Position Sensor Intermittent Low Voltage
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the che

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