display DAEWOO LACETTI 2004 Service Owner's Guide

ENGINE CONTROLS 1F – 211
DAEWOO V–121 BL4
DTC P0341 – Camshaft Position Sensor Rationality
StepActionValue(s)YesNo
1Perform an Euro On–Board Diagnostic (EOBD)
System Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition switch to LOCK.
2. Disconnect the CMP sensor connector.
3. Check for a faulty connector or terminals.
Is the problem found?–Go to Step 4Go to Step 3
31. Turn the Turn the ignition switch to ON.
2. Disconnect the ECM connector.
3. Inspect the ECM pins and connector for bent or
damaged terminals.
4. Check the wire between the CMP sensor termi-
nal 2 and ECM connector 17 for an open or
short to ground or short to battery voltage while
related connectors and wiring harness.
5. Check the wires between the CMP sensor ter-
minal 3 and ECM connector 22 for an open
while moving related connectors and wiring
harness.
Is the problem found?–Go to Step 4Go to Step 5
41. Turn the ignition switch to LOCK.
2. Repair or replace the wire or the connector.
3. Clear any DTCs from the ECM.
4. Run the engine.
5. Perform the diagnostic system check.
Is the repair complete?–System OK–
51. Turn the ignition switch to LOCK.
2. Replace the CMP sensor.
3. Clear any DTCs from the ECM.
4. Run the engine.
5. Perform the diagnostic system check.
Does DTC P0341 reset?–System OKGo to Step 6
61. Replace the ECM.
2. Run the engine.
3. Perform the Diagnostic system check.
Is the replacement complete?–Go to Step 7–
71. Using the scan tool, clear the 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 run
and passed?–Go to Step 8–
8Check 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 – 213
DAEWOO V–121 BL4
DTC P0342 – Camshaft Position Sensor Signal
StepActionValue(s)YesNo
1Perform an Euro On–Board Diagnostic (EOBD)
System Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition switch to LOCK.
2. Disconnect the CMP sensor connector.
3. Check for a faulty connector or terminals.
Is the problem found?–Go to Step 4Go to Step 3
31. Turn the Turn the ignition switch to ON.
2. Disconnect the ECM connector.
3. Inspect the ECM pins and connector for bent or
damaged terminals.
4. Check the wire between the CMP sensor termi-
nal 2 and ECM connector 17 for an open or
short to ground or short to battery voltage while
related connectors and wiring harness.
5. Check the wires between the CMP sensor ter-
minal 3 and ECM connector 22 for an open
while moving related connectors and wiring
harness.
Is the problem found?–Go to Step 4Go to Step 5
41. Turn the ignition switch to LOCK.
2. Repair or replace the wire or the connector.
3. Clear any DTCs from the ECM.
4. Run the engine.
5. Perform the diagnostic system check.
Is the repair complete?–System OK–
51. Turn the ignition switch to LOCK.
2. Replace the CMP sensor.
3. Clear any DTCs from the ECM.
4. Run the engine.
5. Perform the diagnostic system check.
Does DTC P0342 reset?–System OKGo to Step 6
61. Replace the ECM.
2. Run the engine.
3. Perform the Diagnostic system check.
Is the replacement complete?–Go to Step 7–
71. Using the scan tool, clear the 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 run
and passed?–Go to Step 8–
8Check 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 – 215
DAEWOO V–121 BL4
DTC P0351 – Ignition Signal Coil A Fault
StepActionValue(s)YesNo
1Perform an Euro On–Board Diagnostic (EOBD)
System Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
2Check for a faulty connection or a damaged terminal
A at the ignition coil.
Is a problem found?–Go to Step 8Go to Step 3
3Check for a faulty connection or a damaged terminal
32 at the engine control module(ECM) connector.
Is the problem found?–Go to Step 8Go to Step 4
41. Turn the ignition switch to LOCK.
2. Disconnect the ECM.
3. Check the ignition control circuit for a short to
ground.
Is the problem found?–Go to Step 8Go to Step 5
5Check the ignition control circuit for a short to battery
voltage.
Is the problem found?–Go to Step 8Go to Step 6
6Check for an open in the ignition control.
Is the problem found?–Go to Step 8Go to Step 7
7Replace the ECM.
Is the replacement complete?–Go to Step 8–
81. Using the scan tool, clear the Diagnostic
Trouble Codes(DTCs).
S Start the engine and Idle at normal operat-
ing temperature.
S Operate the vehicle within the conditions
for setting this DTC as specified in the sup-
porting text.
Does the scan tool indicate that this diagnostic ran
and passed?–Go to Step 9–
9Check 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 – 217
DAEWOO V–121 BL4
DTC P0352 – Ignition Signal Coil B Fault
StepActionValue(s)YesNo
1Perform an Euro On–Board Diagnostic (EOBD)
System Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
2Check for a faulty connection or a damaged terminal
C at the ignition coil.
Is a problem found?–Go to Step 8Go to Step 3
3Check for a faulty connection or a damaged terminal
31 at the engine control module(ECM) connector.
Is the problem found?–Go to Step 8Go to Step 4
41. Turn the ignition switch to LOCK.
2. Disconnect the ECM.
3. Check the ignition control circuit for a short to
ground.
Is the problem found?–Go to Step 8Go to Step 5
5Check the ignition control circuit for a short to battery
voltage.
Is the problem found?–Go to Step 8Go to Step 6
6Check for an open in the ignition control.
Is the problem found?–Go to Step 8Go to Step 7
7Replace the ECM.
Is the replacement complete?–Go to Step 8–
81. Using the scan tool, clear the Diagnostic
Trouble Codes(DTCs).
S Start the engine and Idle at normal operat-
ing temperature.
S Operate the vehicle within the conditions
for setting this DTC as specified in the sup-
porting text.
Does the scan tool indicate that this diagnostic ran
and passed?–Go to Step 9–
9Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

1F – 220IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
10Check the control circuit for a short to battery voltage
and repair as necessary.
Is a repair necessary?–Go to Step 19Go to Step 12
11Connect the test light to B+ and again probe the con-
trol circuit at terminal 4.
Does the test light illuminate?–Go to Step 15Go to Step 16
12Replace the engine control module (ECM).
Is the replacement complete?–Go to Step 19–
13Check the EGR ground circuit for a poor connection
or proper terminal tension at the ECM and repair as
necessary.
Is a repair necessary?–Go to Step 19Go to Step 17
14Check the 5V reference circuit for a shortage to bat-
tery voltage and repair as necessary.
Is a repair necessary?–Go to Step 19Go to Step 12
15Check the control circuit for a shortage to ground
and repair as necessary.
Is a repair necessary?–Go to Step 19Go to Step 12
16Check the control circuit for an open or poor connec-
tion at the EGR valve electrical connector and repair
as necessary.
Is a repair necessary?–Go to Step 19Go to Step 18
17Replace the EGR valve.
Is the replacement complete?–Go to Step 19–
18Check the ECM electrical connector for a poor con-
nection and repair as necessary.
Is a repair necessary?–Go to Step 19Go to Step 12
191. 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 the DTC as specifiec in the supporting
text.
Does the scan tool indicate that this diagnostic ran
and passed?–Go to Step 20Go to Step 2
20Check 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 – 223
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
12Replace the engine control module (ECM).
Is the replacement complete?–Go to Step 19–
13Check the EGR ground circuit for a poor connection
or proper terminal tension at the ECM and repair as
necessary.
Is a repair necessary?–Go to Step 19Go to Step 17
14Check the 5V reference circuit for a shortage to bat-
tery voltage and repair as necessary.
Is a repair necessary?–Go to Step 19Go to Step 12
15Check the control circuit for a shortage to ground
and repair as necessary.
Is a repair necessary?–Go to Step 19Go to Step 12
16Check the control circuit for an open or poor connec-
tion at the EGR valve electrical connector and repair
as necessary.
Is a repair necessary?–Go to Step 19Go to Step 18
17Replace the EGR valve.
Is the replacement complete?–Go to Step 19–
18Check the ECM electrical connector for a poor con-
nection and repair as necessary.
Is a repair necessary?–Go to Step 19Go to Step 12
191. 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 the DTC as specifiec in the supporting
text.
Does the scan tool indicate that this diagnostic ran
and passed?–Go to Step 20Go to Step 2
20Check 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 – 225
DAEWOO V–121 BL4
Diagnostic Aids
Due to moisture associated with exhaust systems, the
EGR valve may freeze and stick in cold weather at times.
After the vehicle is brought into a warm shop for repairs,
the valve warms and the problem disappears. By watchingthe Actual EGR and desired EGR positions on a cold ve-
hicle with a scan tool, the fault can be easily verified.
Check the Freeze Frame data to determine if the DTC set
when the vehicle was cold by viewing the Engine Coolant
Temperature (ECT).
DTC P0405 – EGR Pintle Position Sensor Low Voltage
StepActionValue(s)YesNo
1Perform an Euro On–Board Diagnostic (EOBD)
System Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition switch ON with the engine
OFF.
2. Install the scan tool.
3. Command the Exhaust Gas Recirculation
(EGR) valve to the specified values.
Does the Actual EGR Position follow the desired
EGR position?25%, 50%
75%, 100%Go to Step 15Go to Step 3
31. Turn the ignition switch ON with the engine
OFF.
2. Disconnect the EGR valve electrical connector.
3. With a Digital Voltmeter (DVM) connected to
ground, probe the 5 volt reference circuit at
terminal 1 to the EGR valve.
Does the DVM read near the specified value?5VGo to Step 4Go to Step 5
4Jumper the 5 volt reference circuit to the signal cir-
cuit at terminals 1 and 3.
Does the actual EGR position display the specified
value ?100%Go to Step 6Go to Step 7
51. Connect the test light to B+.
2. robe the 5 volt reference circuit to the EGR
valve.
Does the test light illuminate?–Go to Step 8Go to Step 9
6Check the 5 volt reference and signal circuit for a
poor connection or proper terminal tension and re-
pair as necessary.
Is a repair necessary?–Go to Step 15Go to Step 10
71. Connect the test light to B+.
2. Probe the signal circuit at terminal 3 to the
EGR valve.
Does the test light illuminate?–Go to Step 11Go to Step 12
8Check for a short to ground in the EGR valve 5 volt
reference circuit and repair as necessary.
Is a repair necessary?–Go to Step 15Go to Step 13
9Check for an open in the EGR valve 5 volt reference
circuit and repair as necessary.
Is a repair necessary?–Go to Step 15Go to Step 14
10Replace the EGR valve.
Is the action complete?–Go to Step 15–
11Check for a short to ground in the EGR valve signal
circuit and repair as necessary.
Is a repair necessary?–Go to Step 15Go to Step 13

1F – 226IENGINE CONTROLS
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
12Check for an open in the EGR valve signal circuit
and repair as necessary.
Is a repair necessary?–Go to Step 15Go to Step 14
131. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the action complete?–Go to Step 15–
14Check the affected circuit for a poor connection or
proper terminal at the ECM and repair as necessary.
Is a repair necessary?–Go to Step 15Go to Step 13
151. 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 the DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic ran
and passed?–Go to Step 16Go to Step 2
16Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

1F – 228IENGINE CONTROLS
DAEWOO V–121 BL4
Diagnostic Aids
Due to moisture associated with exhaust systems, the
EGR valve may freeze and stick in cold weather at times.
After the vehicle is brought into a warm shop for repairs,
the valve warms and the problem disappears. By watchingthe Actual EGR and desired EGR positions on a cold ve-
hicle with a scan tool, the fault can be easily verified.
Check the Freeze Frame data to determine if the DTC set
when the vehicle was cold by viewing the Engine Coolant
Temperature (ECT).
DTC P0406 – EGR Pintle Position Sensor High Voltage
StepActionValue(s)YesNo
1Perform an Euro On–Board Diagnostic (EOBD)
System Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition switch ON with the engine
OFF.
2. Install the scan tool.
3. Command the Exhaust Gas Recirculation
(EGR) valve to the specified values.
Does the Actual EGR Position follow the desired
EGR position?25%, 50%
75%, 100%Go to Step 14Go to Step 3
31. Turn the ignition switch ON with the engine
OFF.
2. Disconnect the EGR valve electrical connector.
3. With a Digital Voltmeter (DVM) connected to
ground, probe the 5 volt reference circuit at
terminal 1 to the EGR valve.
Does the DVM read near the specified value?5VGo to Step 4Go to Step 5
4Jumper the 5 volt reference circuit to the signal cir-
cuit at terminals 1 and 3.
Does the actual EGR position display the specified
value ?100%Go to Step 6Go to Step 7
51. Connect the test light to B+.
2. robe the 5 volt reference circuit to the EGR
valve.
Does the test light illuminate?–Go to Step 8Go to Step 9
6Check the 5 volt reference and signal circuit for a
poor connection or proper terminal tension and re-
pair as necessary.
Is a repair necessary?–Go to Step 14Go to Step 10
71. Connect the test light to ground.
2. Probe the signal circuit at terminal 3 to the
EGR valve.
Does the test light illuminate?–Go to Step 11Go to Step 13
8Check for a short to ground in the EGR valve 5 volt
reference circuit and repair as necessary.
Is a repair necessary?–Go to Step 14Go to Step 12
9Check for an open in the EGR valve 5 volt reference
circuit and repair as necessary.
Is a repair necessary?–Go to Step 14Go to Step 13
10Replace the EGR valve.
Is the action complete?–Go to Step 14–
11Check for a short to voltage in the EGR valve signal
circuit and repair as necessary.
Is a repair necessary?–Go to Step 14Go to Step 12

ENGINE CONTROLS 1F – 229
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
121. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the action complete?–Go to Step 14–
13Check the affected circuit for a poor connection or
proper terminal at the ECM and repair as necessary.
Is a repair necessary?–Go to Step 14Go to Step 12
141. 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 the DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic ran
and passed?–Go to Step 15Go to Step 2
15Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK