2003 DAEWOO MATIZ Service Repair Manual

ENGINE CONTROLS 1F–63
DAEWOO M-150 BL2
DTC P0108 – Manifold Absolute Pressure Sensor High Voltage
StepActionValue(s)YesNo
1
Perform an Euro On-Board Diagnostic (EOBD)
System Check.
Is the system check complete?
–
Go to Step 2
Go to
“On-Board
Diagnostic
System Check”
2
1. Connect the scan tool to the data link connector
(DLC).
2. Turn the ignition switch to ON.
Does the scan tool show the manifold absolute
pressure (MAP) sensor voltage above the value
specified?
4VGo to Step 3Go to Step 4
3
1. Disconnect the vacuum line from the MAP
sensor.
2. Apply 66kPA (20in.of Hg) of vacuum to the MAP
sensor.
Does the scan tool show the MAP sensor voltage
within the value specified?
1.0–1.5V
Go to
“Diagnostic
Aids”
Go to Step 4
4
1. Turn the ignition switch to LOCK.
2. Disconnect the MAP sensor connector.
3. Turn the ignition switch to ON.
4. Measure the voltage between the MAP sensor
connector terminals A and C.
Does the voltage measure within the value
specified?
4.5–5.0VGo to Step 5Go to Step 6
5
Connect a fused jumper between the MAP sensor
connector terminals B and C.
Does the scan tool show the MAP sensor voltage
above the value specified?
4VGo to Step 11Go to Step 9
6
Measure the voltage between the MAP sensor
connector terminal A and ground.
Does the voltage measure within the value
specified?
4.5–5.0VGo to Step 7Go to Step 8
7
1. Turn the ignition switch to LOCK.
2. Check for open wires between the MAP sensor
connector terminal A and the ECM connector
terminal 78.
Is the problem found?
–
Go to Step 10Go to Step 12
8
1. Turn the ignition switch to LOCK.
2. Check for an open or short to ground in the wire
between the MAP sensor connector terminal C
and the ECM connector terminal 12.
Is the problem found ?
–
Go to Step 10Go to Step 12
9
1. Turn the ignition switch to LOCK.
2. Check for an open or short to ground in the wire
between the MAP sensor connector terminal B
and the ECM connector terminal 73.
Is the problem found ?
–
Go to Step 10Go to Step 12
10
1. Repair the wire or the connector terminal as
needed.
2. Clear any DTCs from the ECM.
3. Perform the diagnostic system check.
Is the repair complete?
–
System OK
–

1F–64 ENGINE CONTROLS
DAEWOO M-150 BL2
DTC P0108 – Manifold Absolute Pressure Sensor High Voltage (Cont’d)
StepActionValue(s)YesNo
11
1. Replace the manifold absolute pressure sensor.
2. Clear any DTCs from the ECM.
3. Perform the diagnostic system check.
Is the replacement complete?
–
System OK
–
12Replace the ECM.
Is the replacement complete?–Go to Step 13Go to Step 2
13
Check if any additional DTCs are set.
Are any DTCs displaced that have not been
diagnosed?
–
Go to
applicable DTC
table
System OK

ENGINE CONTROLS 1F–65
DAEWOO M-150 BL2
BLANK

1F–66 ENGINE CONTROLS
DAEWOO M-150 BL2
MAA1F100
DIAGNOSTIC TROUBLE CODE (DTC) – P0112 INTAKE AIR TEMPERATURE
SENSOR LOW VOLTAGE
Circuit Description
The Intake Air Temperature (IAT) Sensor uses a therm-
istor to control the signal voltage to the engine control
module (ECM). The ECM supplies a 5 volt reference
voltage and a ground to the sensor. When the air is cold,
the resistance is high ; therefore IAT sensor signal volt-
age will be high. If the intake air is warm, resistance is
low ; therefore the IAT sensor signal voltage will be low.
Conditions for Setting the DTC

The engine rum time is greater than 3 seconds.

IAT voltage is less than 0.01V
Action Taken when the DTC Sets

Emission related.

“Armed” after two trip with a fail.

“Disarmed” after one trip with a pass.

MIL on if failure is detected in three consecutive trips.

Stores a History DTC on the third consecutive with a
fail (The DTC will be armed after the second fail).
Stores a Freeze Frame on the third consecutive trip
with a fail (if empty).

The ECM will default to 60°C(140°F)for intake air
temperature. The scan tool will not show the de-
faulted value.
Conditions for Clearing the MIL/DTC

The MIL will turn off after four consecutive ignition
cycles in which the diagnostic runs without a fault.

A history DTC will clear after 40 consecutive warm up
cycles without a fault.

DTC(s) can be cleared by using the scan tool.
Diagnostic aids
If the vehicle is at ambient temperature, compare the
IAT sensor to the engine coolant temperature(ECT) sen-
sor. The IAT sensor and the ECT sensor should be rela-
tively close to each other. Use the temperature vs.
Resistance Values table to evaluate the possibility of a
skewed sensor. Refer to “Temperature vs. Resistance”
in this Section.

ENGINE CONTROLS 1F–67
DAEWOO M-150 BL2
DTC P0112 – Intake Air Temperature Sensor Low Voltage
StepActionValue(s)YesNo
1
Perform an Euro On-Board Diagnostic (EOBD)
System Check.
Is the system check complete?
–
Go to Step 2
Go to
“On-Board
Diagnostic
System Check”
2
1. Connect the scan tool to the data link
connector(DLC).
2. Run the engine until it reaches operating
temperature.
Does the scan tool show the IAT sensor reading
within the value specified?
15–80°C
Go to
“Diagnostic
Aids”
Go to Step 3
3
1. Turn the ignition switch to LOCK.
2. Disconnect the IAT sensor connector.
3. Turn the ignition switch to ON.
Does the scan tool show the IAT sensor reading
within the value specified?
≤-30°CGo to Step 4Go to Step 5
4
Check for a faulty connector or terminals at the IAT
sensor connector.
Is the problem found?
–
Go to Step 7Go to Step 6
5
Check for wire for a short to ground between the IAT
connector terminal 1 and the ECM connector
terminal 79.
Is the problem found?
–
Go to Step 7Go to Step 6
6
Check for wire for a short to ECM reference voltage
between the IAT sensor connector terminal 2 and
the ECM connector terminal 47.
Is the problem found?
4.5–5.0VGo to Step 7Go to Step 9
7
1. Turn the ignition switch to LOCK.
2. Repair the wire or the connector terminal as
needed.
3. Clear any DTCs from the ECM.
4. Run the engine until it reaches operating
temperature.
5. Perform the diagnostic system check.
Is the repair complete?
–
System OK
–
8
1. Turn the ignition switch to LOCK.
2. Replace the IAT sensor.
3. Clear any DTCs from the ECM.
4. Run the engine until it reaches operating
temperature.
5. Perform the diagnostic system check.
Is the repair complete?
–
System OK
–
9
1. Turn the ignition switch to LOCK.
2. Replace the engine control module(ECM).
3. Run the engine until it reaches operating
temperature.
4. Perform the diagnostic system check.
Is the repair complete?
–
Go to Step 10
–
10
Check if any additional DTCs are set.
Are any DTCs displaced that have not been
diagnosed?
–
Go to
applicable DTC
table
System OK

1F–68 ENGINE CONTROLS
DAEWOO M-150 BL2
MAA1F100
DIAGNOSTIC TROUBLE CODE (DTC) – P0113 INTAKE AIR TEMPERATURE
SENSOR HIGH VOLTAGE
Circuit Description
The Intake Air Temperature (IAT) Sensor uses a therm-
istor to control the signal voltage to the engine control
module (ECM). The ECM supplies a 5 volt reference
voltage and a ground to the sensor . when the air is cold,
the resistance is high ; therefore IAT sensor signal volt-
age will be high. If the intake air is warm, resistance is
low ; therefore the IAT sensor signal voltage will be low.
Conditions for Setting the DTC

The engine rum time is greater than 3 seconds.

IAT voltage is greater than 4.99V.
Action Taken when the DTC Sets

Emission related.

“Armed” after two trip with a fail.

“Disarmed” after one trip with a pass.

MIL on if failure is detected in three consecutive trips.

Stores a History DTC on the third consecutive with a
fail (The DTC will be armed after the second fail).
Stores a Freeze Frame on the third consecutive trip
with a fail (if empty).

The ECM will default to last valid value for intake air
temperature. The scan tool will not show the de-
faulted value.
Conditions for Clearing the MIL/DTC

The MIL will turn off after four consecutive ignition
cycles in which the diagnostic runs without a fault.

A history DTC will clear after 40 consecutive warm up
cycles without a fault.

DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
If the vehicle is at ambient temperature, compare the
IAT sensor to the engine coolant temperature (ECT)
sensor. The IAT sensor and the ECT sensor should be
relatively close to each other.
Use the temperature vs. Resistance Values table to
evaluate the possibility of a skewed sensor. Refer to
“Temperature vs. Resistance” in this Section.

ENGINE CONTROLS 1F–69
DAEWOO M-150 BL2
DTC P0113 – Intake Air Temperature Sensor High Voltage
StepActionValue(s)YesNo
1
Perform an Euro On-Board Diagnostic (EOBD)
System Check.
Is the system check complete?
–
Go to Step 2
Go to
“On-Board
Diagnostic
System Check”
2
1. Connect the scan tool to the data link connector
(DLC).
2. Run the engine unit it reaches operating
temperature.
Does the scan tool show the intake air temperature
(IAT) sensor reading within the value specified?
15~80°C
(10~176°F)
Go to
“Diagnostic
Aids”
Go to Step 3
3
1. Turn the ignition switch to LOCK.
2. Disconnect the IAT sensor connector.
3. Jumper to IAT sensor connector terminals.
4. Turn the ignition switch to ON.
Does the scan tool show the IAT sensor reading the
value specified?
180°C
(356°F)
Go to Step 4Go to Step 5
4
Check for a faulty connector or terminals 1 and 2 of
the IAT sensor connector.
Is the problem found?
–
Go to Step 10Go to Step 9
5
Measure the voltage between terminals 1 and 2 of
IAT sensor connector.
Does the voltage measure within the value
specified?
4.5~5.5VGo to Step 11Go to Step 6
6
Measure the voltage between the IAT sensor
connector terminal 2 and the battery
ground(negative) post.
Does the voltage measure within the value
specified?
4.5~5.5VGo to Step 7Go to Step 8
7
1. Turn the ignition switch to LOCK.
2. Check for an open or short to battery voltage in
the wire between the IAT sensor connector
terminal 2 and the engine control module(ECM)
connector terminal 47.
Is the problem found?
–
Go to Step 10Go to Step 11
8
1. Turn the ignition switch to LOCK.
2. Check for an open or short to battery voltage in
the wire between the IAT sensor connector
terminal 1 and the ECM connector terminal 79.
Is the problem found?
–
Go to Step 10Go to Step 11
9
1. Turn the ignition switch to LOCK
2. Replace the IAT sensor.
3. Clear any DTCs from the ECM.
4. Perform the diagnostic system check.
Is the repair complete?
–
System OK
–
10
1. Turn the ignition switch to LOCK.
2.Repair the wire of the connector terminals as
needed.
3. Clear any DTCs from the ECM.
4. Perform the diagnostic system check.
Is the repair complete?
–
System OK
–

1F–70 ENGINE CONTROLS
DAEWOO M-150 BL2
DTC P0113 – Intake Air Temperature Sensor High Voltage (Cont’d)
StepActionValue(s)YesNo
11
1. Replace the ECM
2. Perform the diagnostic system check.
Is the repair complete?
–
Go to Step 12
–
12
Check if any additional DTCs are set.
Are any DTCs displaced that have not been
diagnosed?
–Go to applicable
DTC table
System OK