2004 DAEWOO NUBIRA fuel

ENGINE CONTROLS 1F – 549
DAEWOO V–121 BL4
DTC P1171 – Fuel Trim Supply System Lean During Power
Enrichment
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Install a scan tool to the Data Link Connector
(DLC).
2. Turn the ignition ON.
Are any component related Diagnostic Trouble
Codes (DTCs) set?–Go to
applicable DTC
tableGo to Step 3
31. Check the vehicle for an adequate amount of
fuel.
2. Add fuel to the vehicles fuel tank if the tank is
almost empty.
Did the fuel tank require fuel?–Go to Step 5Go to Step 4
41. Using a scan tool, observe the Front Heated
Oxygen Sensor (HO2S1) voltage while acceler-
ating the engine over 1200 rpm.
2. The HO2S1 voltage should vary from specified
voltage (100––900 mV) and occasionally toggle
above the specified voltage while accelerating.
Is the HO2S1 voltage toggle?3507 mVGo to
”Fuel System
Diagnosis”Go to
”DTC P0134
Oxygen Sensor
No Activity”
51. Using the scan tool, clear the Diagnostic
Trouble Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?–Go to Step 6Go to Step 2
6Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

1F – 550IENGINE CONTROLS
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1336
58X CRANK POSITION TOOTH ERROR NOT LEARNED
Circuit Description
In order to detect engine misfire at higher engine speeds,
the Engine Control Module (ECM) must know of any varia-
tion between the crankshaft sensor pulses. Most varia-
tions are due to the machining of the crankshaft reluctor
wheel. However, other sources of variation are also pos-
sible. A Crankshaft Position (CKP) system variation learn-
ing procedure must be performed any time a change is
made to the crankshaft sensor to crankshaft relationship
of if the ECM is replaced or reprogrammed. The ECM
measures the variations and then calculates compensa-
tion factors needed to enable the ECM to accurately de-
tect engine misfire at all speeds and loads. A scan tool
must be used to command the ECM to learn these varia-
tions. If for any reason the ECM is unable to learn these
variations or they are out of an acceptable range, the ECM
will set Diagnostic Trouble Code (DTC) P1336. An ECM
that has not had the CKP system variation learning proce-
dure performed due to replacement or reprogramming will
also set DTC P1336.
Conditions for Setting the DTC
S Tooth error not learned if the manufacture enable
counter is set to zero.
S DTCs P0106, P0107, P0108, P0117, P0118,
P0122, P0123, P0132, P0201, P0202, P0203,
P0204, P0325 , 0327, P0336, P0337, P0341,
P0342, P0351, P0352, P0402, P1404, P0404,
P0405, P0406 and P0502 are not set.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will illumi-
nate.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Freeze Frame and Failure Records
buffer.
S A history DTC is stored.
Conditions for Clearing the MIL/DTC
S The MIL will turn OFF after four consecutive igni-
tion cycles in which the diagnostic runs without a
fault.
S A history DTC will clear after 40 consecutive warm
up cycles without a fault.
S Disconnecting the ECM battery feed for more than
10 seconds.
S DTC(s) can be cleared by using the scan tool.Diagnostic Aids
CAUTION : To avoid personal injury when performing
the crankshaft position system variation learning
procedure, always set the vehice parking brake and
block the drive wheels. Release the throttle immedi-
ately when the engine starts to decelerate. Once the
learn procedure is completed, engine control will be
returned to the operator, and the engine will respond
to throttle position.
DTC P1336 will only set if the ECM has not learned the
CKP system variation. The ECM only needs to learn this
variation once per life cycle of the vehicle unless the crank
sensor to crankshaft relationship is disturbed. Removing
a part is considered a disturbance. A fully warmed engine
is critical to learning the variation correctly. If a valid learn
occurs, no other learns can be completed that ignition
cycle.
If the engine cuts out before the specified learn procedure
engine speed or at normal fuel cutoff rpm, the ECM is not
in the learn procedure mode.
Test Description
The number(s) below refer to step(s) on the diagnostic
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 fault occurred. The information is then stored on
the scan tool for later reference.
2. Engine temperature is critical to properly learn the
CKP system variation. Failure to properly warm the
engine before performing this procedure will result
in an inaccurate measurement of the CKP system
variation. The ECM learns this variation as the en-
gine is decelerating and then allows engine control
to be returned to the operator. All accessories must
be OFF when learning the CKP system angle varia-
tion. If the A/C is not disabled when the learn pro-
cedure is enabled, the ECM will disable the A/C.
3. If after the specified number attempts the ECM
cannot learn the CKP system variation, then the
variation is too large and no further attempts should
be made until the variation problem is corrected.
4. Being unable to learn the procedure indicates that
the variation is out of range.
5. After the CKP system variation has been learned,
wait above 10 seconds with ignition switch OFF to
prevent being cleared the learned value.

ENGINE CONTROLS 1F – 565
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1404
EXHAUST GAS RECIRCULATION CLOSED VALVE
PINTLE ERROR
Circuit Description
An Exhaust Gas Recirculation (EGR) system is used to
lower Oxides of Nitrogen (NOx) emission levels caused by
high combustion temperatures. It accomplishes this by
feeding small amounts of exhaust gases back into the
combustion chamber.When the air/fuelmixture is diluted
with the exhaust gases, combustion temperatures are re-
duced.
A linear EGR valve is used on this system. The linear EGR
valve is designed to accurately supply exhaust gases to
the engine without the use of intake manifold vacuum. The
valve controls exhaust flow going into the intake manifold
from the exhaust manifold through an orifice with an En-
gine Control Module (ECM) controlled pintle. The ECM
controls the pintle position using inputs from the Throttle
Position (TP) and Manifold Absolute Pressure (MAP) sen-
sors. The ECM then commands the EGR valve to operate
when necessary by controlling an ignition signal through
the ECM. This can be monitored on a scan tool as the De-
sired EGR Position.
The ECM monitors the results of its command through a
feedback signal. By sending a 5 volt reference and a
ground to the EGR valve, a voltage signal representing the
EGR valve pintle position is sent to the ECM. This feed-
back signal can also be monitored on a scan tool and is the
actual position of the EGR pintle. The Actual EGR Position
should always be near the commanded or Desired EGR
Position.
Conditions for Setting the DTC
S Difference between current and learned low posi-
tion is greater than 10%.S Desired EGR position is equal to 0.
S Engine is running.
S Ignition voltage is between 11.7 and 16 volts.
S Intake Air Temperature (IAT) is greater than 3°C
(37.4°F).
S DTCs P0112, P0113, P0405, P0406, and P0502
are not set.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will illuminate
after three consecutive trip with a fail.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Freeze Frame and Failure Records
buffers.
S A history Diagnostic Trouble Code (DTC) is stored.
S EGR is disabled.
Conditions for Clearing the MIL/DTC
S The MIL will turn off after three consecutive ignition
cycles in which the diagnostic runs without a fault.
S A history DTC will clear after 80 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
Due to moisture associated with exhaust systems, the
EGR valve may freeze and stick in cold weather. After the
vehicle is brought into a warm shop for repairs, the valve
warms and the problem disappears. By watching the Actu-
al EGR and Desired EGR Positions on a cold vehicle with
a scan tool, the fault can be easily verified. Check the

ENGINE CONTROLS 1F – 569
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1607
LOWER POWER COUNTER RESET
Circuit Description
The Engine Control Module (ECM) is the control center of
the fuel injection system. It constantly looks at the informa-
tion from various sensors, and controls the systems that
affect vehicle performance. The ECM also performs the
diagnostic function of the system. It can recognize opera-
tional problems, alert the driver through the Malfunction In-
dicator Lamp (MIL) (Check Engine), and store a Diagnos-
tic Trouble Code (DTC) or DTCs which identify the
problem areas to aid the technician in making repairs. An
Electrically Erasable Programmable Read Only Memory
(EEPROM) is used to house the program information and
the calibrations required for engine, transmission, and
powertrain diagnostics operation. The ECM monitors EE-
PROM reset flag and Lower Power Counter I/C overflow
bits. If the ECM detects if Lower Power Counter I/C has
been reset due to battery disconnect or Lower Power
Counter I/C malfunction, the Diagnostic Trouble Code
(DTC) will stored.Conditions for Setting the DTC
S Ignition switch is turned to ON.
S Engine is not running.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Freeze Frame and Failure Records
buffers.
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.
DTC P1607 – Lower Power Counter Reset
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the check performed?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?–Go to Step 3–
31. Using the scan tool, clear the Diagnostic
Trouble Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?–Go to Step 4Go to Step 2
4Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

1F – 570IENGINE CONTROLS
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1626
IMMOBILIZER NO RESPONSE
Circuit Description
The Engine Control Module (ECM) is the control center of
the fuel injection system. It constantly looks at the informa-
tion from various sensors, and controls the systems that
affect vehicle performance. The ECM also performs the
diagnostic function of the system. It can recognize opera-
tional problems, alert the driver through the Malfunction In-
dicator Lamp (MIL) (Check Engine), and store a Diagnos-
tic Trouble Code (DTC) or DTCs which identify the
problem areas to aid the technician in making repairs. The
ECM detects communication link failure with immobilizer
control unit.
Conditions for Setting the DTC
S No immobilizer message identification for ECM re-
lease time window (1.5 or 2.0 seconds).S Ignition switch is turned to ON.
S ECM release time window expired.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffers.
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.
DTC P1626 – Immobilizer No Response
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the check performed?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?–Go to Step 3–
31. Using the scan tool, clear the Diagnostic
Trouble Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?–Go to Step 4Go to Step 2
4Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

ENGINE CONTROLS 1F – 571
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1631
IMMOBILIZER INVALID RESPONSE
Circuit Description
The Engine Control Module (ECM) is the control center of
the fuel injection system. It constantly looks at the informa-
tion from various sensors, and controls the systems that
affect vehicle performance. The ECM also performs the
diagnostic function of the system. It can recognize opera-
tional problems, alert the driver through the Malfunction In-
dicator Lamp (MIL) (Check Engine), and store a Diagnos-
tic Trouble Code (DTC) or DTCs which identify the
problem areas to aid the technician in making repairs. The
ECM received incorrect message identification.
Conditions for Setting the DTC
S Wrong immobilizer message received.
S Ignition switch is turned to ON.
S Immobilizer option selected.S ECM release time window expired.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffers.
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.
DTC P1631 – Immobilizer Invalid Response
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the check performed?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?–Go to Step 3–
31. Using the scan tool, clear the Diagnostic
Trouble Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?–Go to Step 4Go to Step 2
4Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

1F – 572IENGINE CONTROLS
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1650
SPI COMMUNICATION BETWEEN ERROR WITH SIDM
CHIP
Circuit Description
The Engine Control Module (ECM) is the control center of
the fuel injection system. It constantly looks at the informa-
tion from various sensors, and controls the systems that
affect vehicle performance. The ECM also performs the
diagnostic function of the system. It can recognize opera-
tional problems, alert the driver through the Malfunction In-
dicator Lamp (MIL) (Check Engine), and store a Diagnos-
tic Trouble Code (DTC) or DTCs which identify the
problem areas to aid the technician in making repairs. An
Electrically Erasable Programmable Read Only Memory
(EEPROM) is used to house the program information and
the calibrations required for engine, transmission, and
powertrain diagnostics operation. The Diagnostic Trouble
Code (DTC) will stored, when the ECM detects SPI com-
munication between main CPU and output driver I/C is
corrupted.
Conditions for Setting the DTCS Ignition switch is turned to ON.
S Battery voltage is greater than 11 volts.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Freeze Frame and Failure Records
buffers.
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.
DTC P1650 – SPI Communication Between Error with SIDM Chip
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the check performed?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?–Go to Step 3–
31. Using the scan tool, clear the Diagnostic
Trouble Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?–Go to Step 4Go to Step 2
4Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

ENGINE CONTROLS 1F – 573
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1655
SPI COMMUNICATION BETWEEN ERROR WITH PSVI
CHIP
Circuit Description
The Engine Control Module (ECM) is the control center of
the fuel injection system. It constantly looks at the informa-
tion from various sensors, and controls the systems that
affect vehicle performance. The ECM also performs the
diagnostic function of the system. It can recognize opera-
tional problems, alert the driver through the Malfunction In-
dicator Lamp (MIL) (Check Engine), and store a Diagnos-
tic Trouble Code (DTC) or DTCs which identify the
problem areas to aid the technician in making repairs. An
Electrically Erasable Programmable Read Only Memory
(EEPROM) is used to house the program information and
the calibrations required for engine, transmission, and
powertrain diagnostics operation. The Diagnostic Trouble
Code (DTC) will stored, when the ECM detects corrupted
serial peripheral interface (SPI) comunication between
main CPU and output driver I/C.
Conditions for Setting the DTCS Ignition switch is turned to ON.
S Battery voltage is greater than 11 volts.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will illuminate
after three consecutive trip with a fail.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Freeze Frame and Failure Records
buffers.
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.
DTC P1655 – SPI Communication Between Error with PSVI Chip
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the check performed?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?–Go to Step 3–
31. Using the scan tool, clear the Diagnostic
Trouble Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?–Go to Step 4Go to Step 2
4Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK