speed sensor DAEWOO LACETTI 2004 Service Repair Manual

5A2 – 30IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
Manual Shifting Test
Manual shifting test is to determine whether failure symp-
tom is within electrical failure or mechanical failure.
1. Disconnect wire harness of shift solenoid, check
the range and gear positions correspond with below
table when driving by manual shifting.
Range
Gear
D3rd gear
RReverse
Notice : Make sure to disconnect only wire harness of shift
solenoid.
UNIT INSPECTION
Drive Plate Deflection
S Inspect drive plate deflection if within standard
value.
Standard Value
within 0.2mm (0.008 in)
Action :
Standard value is not within the specified value, replace
drive plate.
When ”abnormal wear” or ”stick” on torque converter
sleeve or oil pump is found, replace torque converter and
A/T.
Notice :
S When assembling torque converter and drive plate.
Be sure to use correct bolt with correct length. The
bolt pushes up torque converter front cover, and it
damages lock–up clutch lining. As a result, it cause
major failure ”No move”.
S Do not tighten the bolts by using impact wrench.
Cooler Pipe Bending and Choke
S Inspect it whether there is abnormal pipe bending in
the cooler pipe, pipe deformation and small cross–
section area of pipe line.
Action : Replace failure parts.S Apply compressed air of 2kg/cm
2 from cooler pipe
inlet side, inspect whether there is not cooler pipe
choke by confirming air flow smooth.
Action : Remove foreign particles and clean inside of pipe
line.
Normal
Vehicle Speed Sensor
1. Remove the connector of vehicle speed sensor,
connect 12V power supply and voltmeter to the ter-
minal.(Do not mistake polarity)
2. Check voltage change from approx. 0V to 12V with
vehicle speed sensor driven gear rotated.
Notice : The voltage change should be 4 times for 1 revo-
lution of the vehicle speed sensor driven gear.
Action : If the result of inspection is bad, replace the ve-
hicle speed sensor.

AISIN AUTOMATIC TRANSAXLE 5A2 – 31
DAEWOO V–121 BL4
Input Speed Sensor
S Inspect resistance of each input speed senor be-
tween terminals.
Notice :
S Make sure to inspect resistance again at 20°C
(68°F) when resistance differ from standards ex-
cept 20°C (68°F).
S It might become infinity ohm when inspect resist-
ance at higher temperature.
Action : If the result of inspection is bad, replace ISS.
Transmission Range (TR) Switch
S Remove TR switch connector and inspect continuty
each range according to the conection chart.
Action : If the result of inspection is bad, replace the TR
switch.
Transmission Fluid Temperature Sensor
S Inspect the resistance between the terminals of
TFT sensor at 10°C (50°F) and 110°C (230°F).
Standard Value
10°C (50°F)11 0°C (230°F)
5.80~7.09 kΩ0.23~0.263 kΩ
Action : If the result of inspection is bad, replace the TFT
sensor.

5A2 – 36IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE DIAGNOSIS
DIAGNOSTIC TROUBLE CODE CHART
DTCDESCRIPTIONTYPEIlluminate
MILBlink
Hold
Lamp
P0562System Voltage LowBYe sNo
P0563System Voltage HighBYe sNo
P0601Internal Control Module Memory Checksum ErrorAYe sNo
P0604Internal Transmission Control Module (TCM) Random Access
Memory (RAM) ErrorBYe sNo
P0705Transmission Range (TR) Switch Circuit MalfunctionBYe sNo
P0712Transmission Fluid Temperature Sensor Circuit Low InputAYe sNo
P0713Transmission Fluid Temperature Sensor Circuit High InputAYe sNo
P0717Input Shaft Speed (ISS) Sensor Circuit No SignalAYe sNo
P0722Output Shaft Speed (OSS) sensor Circuit No SignalAYe sNo
P0727Engine Speed Input Circuit No SignalAYe sNo
P0741Torque Converter Clutch (TCC) Circuit Stuck OffBYe sNo
P0742Torque Converter Clutch (TCC) Circuit Stuck OnBYe sNo
P0743Torque Converter Clutch (TCC) ElectricalBYe sNo
P0748Pressure Control Solenoid (PCS) ElectricalAYe sNo
P0751Shift Solenoid 1 (SS1) Stuck OffBYe sNo
P0753Shift Solenoid 1 (SS1) ElectricalAYe sNo
P0756Shift Solenoid 2 (SS2) Stuck OffBYe sNo
P0758Shift Solenoid 2 (SS2) ElectricalAYe sNo
P0785Timing Solenoid (ST) ElectricalAYe sNo
P1781Engine Torque Signal ErrorAYe sNo
P1791Throttle Position Signal ErrorAYe sNo
P1792Engine Coolant Temperature (ECT) Signal ErrorDNoNo
U2105CAN ErrorAYe sNo
* Description of Type
S Type A : TCM will request the illumination of MIL and store DTC when TCM detects a failure on the first ignition
cycle.
S Type B : TCM will request the illumination of MIL and store DTC when TCM detects failures on two consecutive
ignition cycle.
S Type D : TCM will not request the illumination of MIL or hold lamp, but will store DTC when TCM detects a failure
on the first ignition cycle.

5A2 – 56IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0717
INPUT SHAFT SPEED (ISS) SENSOR CIRCUIT NO
SIGNAL
Conditions for Setting the DTC
S This DTC detects no signal of Input Shaft Speed
(ISS) sensor circuit for a long period of time. ( Rev-
olution : 0 rpm
10000 rpm).
S TCM detects no pulse of ISS sensor while TCM
detects 4 pulses of Output Speed Sensor. This
detection 1000 times continuously.
S D,2,L range selected
S Engine revolution is 400 rpm or greater.
S DTCs P0751, P0753, P0756, P0758, and P0705
are not set.
S Output revolution is 775 rpm or greater.
S 25 seconds later after Neutral to Drive shift.
S 10 seconds later after changing the gear.
Action Taken When the DTC Sets
S TCM will request the illumination of MIL and store
DTC when TCM detects a failure on the first ignition
cycle.
S No lockup control
S No engine torque reduction controlS No engagement pressure control
S No 4th gear
S No self–learning control
S No timing solenoid control N–D
Conditions for Clearing the DTC
S The TCM turns off the MIL when no further failures
detected for three consecutive ignition cycles.
S The scan tool can clear the DTC from the TCM his-
tory.
S The TCM clears the DTC from the TCM history
memory after forty consecutive warm up cycles
without fault.
S TCM detects 250 pulses of ISS while failure detec-
tion is not achieved.
Cause of Failure
S Wiring harness or connector between Input Shaft
Speed (ISS) sensor and TCM
S ISS sensor
S TCM

AISIN AUTOMATIC TRANSAXLE 5A2 – 57
DAEWOO V–121 BL4
DTC P0717 Input Shaft Speed (ISS) Sensor Circuit No Signal
StepActionValue(s)YesNo
11. Turn the ignition OFF.
2. Install the Scan tool.
3. With the engine OFF, turn the ignition switch to
the ON position.
4. Select Store Freeze Frame/Failure Records
from the Diagnostic Trouble Codes Information
menu.
5. Store Freeze Frame/Failure Records.
6. Select Clear DTC Information from the Diag-
nostic Trouble Codes Information menu.
7. Clear DTC Information.
8. Perform one vehicle drive cycle.
Is the Malfunction Indicator Lamp (MIL) ON?–Go to Step 2Repair the tem-
porary connec-
tion failure of
connector (Re-
fer to ”Wiring
Harness and
Connector” in
this section.)
21. Select Request DTC by Status from the Diag-
nostic Trouble Codes Information menu.
2. Request DTC by Status.
Is DTC P0717 displayed?–Go to Step 3Repair the tem-
porary connec-
tion failure of
connector (Re-
fer to ”Wiring
Harness and
Connector” in
this section.)
31. Turn the ignition OFF.
2. Inspect the resistance between the vehicle har-
ness and Input Shaft Speed (ISS) sensor. Re-
fer to”Unit Inspection” in this section.
3. Disconnect the TCM connector (X–1) and in-
spect the resistance between the terminal B6
and B16.
Is the measurement within the specified value?20°C (68°F):
560–680 WGo to Step 4Go to Step 5
41. Estimate the failure of between the vehicle wir-
ing harness connector and TCM.
2. Inspect the connector. Refer to ”Wiring Har-
ness and Connector Inspection” in this section.
3. Inspect the connection condition between the
connectors (C–1).
Is the connection condition OK?–Go to Step 6Repair the wir-
ing harness
connectors.
51. Estimate the failure of T/M wire or between the
connectors of ISS sensor.
2. Disconnect the ISS sensor connector (X–5)
and inspect the resistance between terminals 1
and 2.
Is the measurement within the specified value?20°C (68°F):
560–680WGo to Step 7Replace the
ISS sensor

AISIN AUTOMATIC TRANSAXLE 5A2 – 59
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0722
OUPUT SHAFT SPEED (OSS) SENSOR CIRCUIT NO
SIGNAL
Conditions for Setting the DTC
S This DTC detects no signal of Output Shaft Speed
(OSS) sensor circuit for a long period of time. (
Revolution : 0 rpm
10000 rpm).
S TCM detects no pulse of Output Shaft Speed
(OSS) sensor while TCM detects 178 pulses of In-
put Shaft Speed sensor. This detection 500 times
continuously.
S D,2,L range selected
S Input speed is 5 km/h (3 mph) or greater.
S DTCs P0751, P0753, P0756, P0758, P0717 and
P0705 are not set.
S 25 seconds later after Neutral to Drive shift.
Action Taken When the DTC Sets
S TCM will request the illumination of MIL and store
DTC when TCM detects a failure on the first ignition
cycle.
S No lockup control
S No engine torque reduction control
S No engagement pressure controlS No 4th gear
S No self–learning control
S No prevent reverse gear control
Conditions for Clearing the DTC
S The TCM turns off the MIL when no further failures
detected for three consecutive ignition cycles.
S The scan tool can clear the DTC from the TCM his-
tory.
S The TCM clears the DTC from the TCM history
memory after forty consecutive warm up cycles
without fault.
S TCM detects 250 pulses of Output Shaft Speed
(OSS) sensor while failure detection is not
achieved.
Cause of Failure
S Wiring harness or connector between Output Shaft
Speed (OSS) sensor and TCM
S OSS sensor
S TCM

5A2 – 60IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DTC P0722 Output Shaft Speed (OSS) sensor Circuit No Signal
StepActionValue(s)YesNo
11. Turn the ignition OFF.
2. Install the Scan tool.
3. With the engine OFF, turn the ignition switch to
the ON position.
4. Select Store Freeze Frame/Failure Records
from the Diagnostic Trouble Codes Information
menu.
5. Store Freeze Frame/Failure Records.
6. Select Clear DTC Information from the Diag-
nostic Trouble Codes Information menu.
7. Clear DTC Information.
8. Perform one vehicle drive cycle.
Is the Malfunction Indicator Lamp (MIL) ON?–Go to Step 2Repair the tem-
porary connec-
tion failure of
connector (Re-
fer to ”Wiring
Harness and
Connector In-
spection” in this
section.)
21. Select Request DTC by Status from the Diag-
nostic Trouble Codes Information menu.
2. Request DTC by Status.
Is DTC P0722 displayed?–Go to Step 3Repair the tem-
porary connec-
tion failure of
connector (Re-
fer to ”Wiring
Harness and
Connector In-
spection” in this
section.)
31. Turn the ignition OFF.
2. Inspect the voltage between vehicle harness
and the Output Shaft Speed (OSS) sensor.
3. Disconnect the connector (X–1) of the vehicle
harness.
4. Connect the voltmeter to monitor the voltage
between terminal B25 and ground.
5. Turn ignition ON and lift up the vehicle.
6. Check the voltage change from approximately
0 v to 12 v when the wheel is turned slowly.
Does the measurement change within the specified
value?0–12 vGo to Step 4Go to Step 5
41. Estimate the failure of between the vehicle wir-
ing harness connector and TCM.
2. Inspect the connector. Refer to ”Wiring Har-
ness and Connector Inspection” in this section.
3. Inspect the connection condition between the
connectors (C–1).
Is the connection condition OK?–Go to Step 6Repair the wir-
ing harness
connectors.
51. Estimate the failure of T/M wire or between the
connectors of OSS sensor.
2. Inspect the OSS sensor. Refer to ”Unit Inspec-
tion” in this section
Is the condition of OSS sensor OK?–Go to Step 7Replace the
OSS sensor

AISIN AUTOMATIC TRANSAXLE 5A2 – 65
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0741
TORQUE CONVERTER CLUTCH (TCC) CIRCUIT STUCK
OFF
Conditions for Setting the DTC
S Lockup solenoid is stuck OFF.
S D range selected
S Engine water normal temperature
S 20 seconds have passed since the transaxle was
placed in D.
S Engine revolution is 600 rpm or greater.
S No failure of input speed sensor / engine revolution
/ water temperature signal / solenoid electrical /
ranger sensor / throttle signal
Action Taken When the DTC Sets
S TCM will request the illumination of MIL and store
DTC when TCM detects failures on two consecu-
tive ignition cycles.Conditions for Clearing the DTC
S The TCM turns off the MIL when no further failures
detected for three consecutive ignition cycles.
S The scan tool can clear the DTC from the TCM his-
tory.
S The TCM clears the DTC from the TCM history
memory after forty consecutive warm up cycles
without fault.
Cause of Failure
S Lockup solenoid
S Inside A/T
S Inside valve body
S TCM

AISIN AUTOMATIC TRANSAXLE 5A2 – 67
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0742
TORQUE CONVERTER CLUTCH (TCC) CIRCUIT STUCK
ON
Conditions for Setting the DTC
S Lockup solenoid is stuck ON.
S D range selected
S Engine water normal temperature
S 20 seconds have passed since the transaxle was
placed in D.
S Engine revolution is 600 rpm or greater.
S No failure of input speed sensor / engine revolution
/ water temperature signal / solenoid electrical /
ranger sensor / throttle signal
Action Taken When the DTC Sets
S TCM will request the illumination of MIL and store
DTC when TCM detects failures on two consecu-
tive ignition cycles.Conditions for Clearing the DTC
S The TCM turns off the MIL when no further failures
detected for three consecutive ignition cycles.
S The scan tool can clear the DTC from the TCM his-
tory.
S The TCM clears the DTC from the TCM history
memory after forty consecutive warm up cycles
without fault.
Cause of Failure
S Lockup solenoid
S Inside A/T
S Inside valve body
S TCM

AISIN AUTOMATIC TRANSAXLE 5A2 – 75
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0751
SHIFT SOLENOID 1 (SS1) STUCK OFF
Conditions for Setting the DTC
S Shift Solenoid 1 (SS1) is stuck ON/OFF.
S D range selected
S Engine water normal temperature
S 20 seconds have passed since the transaxle was
placed in D.
S Engine revolution is 600 rpm or greater.
S No failure of output speed sensor / input speed
sensor / engine revolution / water temperature sig-
nal / solenoid electrical / ranger sensor / throttle
signal
Action Taken When the DTC SetsS TCM will request the illumination of MIL and store
DTC when TCM detects failures on two consecu-
tive ignition cycles.
Conditions for Clearing the DTC
S The TCM turns off the MIL when no further failures
detected for three consecutive ignition cycles.
S The scan tool can clear the DTC from the TCM his-
tory.
S The TCM clears the DTC from the TCM history
memory after forty consecutive warm up cycles
without fault.
Cause of Failure
S Shift Solenoid 1 (SS1)
S Inside Valve Body
S TCM