torque DAEWOO LACETTI 2004 Service Repair Manual

5A2 – 82IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0758
SHIFT SOLENOID 2 (SS2) ELECTRICAL
Conditions for Setting the DTC
S TCM detects that the ON signal of the Shift Sole-
noid 2 (SS2) monitor during 0.5 seconds when SS2
driver outputs the OFF signal.(When the SS2 circuit
is open or short to battery).
S TCM detects that the OFF signal of the Shift Sole-
noid 2 (SS2) monitor during 0.3 seconds when SS2
driver outputs the ON signal.(When the SS2 circuit
is short to ground).
S The above detection 2 times at shifting continuous-
ly.
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 control
S No timing solenoid control for N–D
S No self–learning control
S After failure decision : emergency modeTCM Shifting Pattern (Range : D)
Normal
SS2 FAIL
GearSS1SS2GearSS1SS2
1 stONON2 ndONFAIL
2 ndONOFF2 ndONFAIL
3 rdOFFOFF3 rdOFFFAIL
4 thOFFON3 rdOFFFAIL
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 the ON signal of the SS2 monitor dur-
ing 160 ms when SS2 driver outputs the ON signal
and TCM detects the OFF signal of the SS2 moni-
tor during 160 ms when SS2 driver outputs the
OFF signal.

5A2 – 88IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1781
ENGINE TORQUE SIGNAL ERROR
Conditions for Setting the DTC
S TCM detects that malfunction of engine speed sig-
nal for 2 seconds.
S No DTC U2105
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 engine torque reduction control
S No engagement pressure control
S No 4th gear
S No self–learning controlConditions 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 Wiring harness or connector between ECM and
TCM
S ECM
S TCM

AISIN AUTOMATIC TRANSAXLE 5A2 – 89
DAEWOO V–121 BL4
DTC P1781 Engine Torque Signal Error
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 cycles.
Is the Malfunction Indicator Lamp (MIL) ON?–Go to Step 2Repair the tem-
porary connec-
tion failure of
connector.
21. Select Request DTC by Status from the Diag-
nostic Trouble Codes Information menu.
2. Request DTC by Status.
Is DTC P1781 displayed?–Go to Step 3Repair the tem-
porary connec-
tion failure of
connector.
31. Turn the ignition OFF.
2. Disconnect the TCM wiring connector and
ECM wiring connector.
3. Measure the resistance between terminal A17
of the TCM wiring connector and terminal 88 of
the ECM wiring connector.
4. Measure the resistance between terminal A7 of
the TCM wiring connector and terminal 57 of
the ECM wiring connector.
Is the resistance within the values shown?0 WGo to Step 5Go to Step 4
4Repair the malfunctioning terminals as necessary.
Is the action complete?–System OK–
51. Turn the ignition ON.
2. Measure the voltage of terminal A17.
3. Measure the voltage of terminal A7.
Is the voltage within the values shown?11–14 vGo to Step 6Go to Step 7
6Repair the malfunctioning terminals as necessary.
Is the action complete?–System OK–
71. Inspect the ”Engine Speed”. Refer to Section
1F, Diagnosis.
Was a problem found?–Refer to Sec-
tion 1F, Diagno-
sis.Go to Step 8
81. Replace the TCM.
2. Turn the ignition OFF.
3. Turn the ignition ON.
4. Check if P1781 DTC is set.
Is the DTC set?–Go to Step 9Go to Step 10

AISIN AUTOMATIC TRANSAXLE 5A2 – 97
DAEWOO V–121 BL4
MAINTENANCE AND REPAIR
ON–VEHICLE SERVICE
TRANSAXLE FLUID LEVEL
CHECKING PROCEDURE
Notice : Check the fluid level when the transaxle tempera-
ture is 70°C~80°C (158°F~176°F).
Notice : During the fluid level check, the selector lever
must be in position P.
Notice : When adding fluid or making a complete fluid
change, always use ISU DEXRON III. Failure to use the
proper fluid will cause hose and seal damage and fluid
leaks.
1. Make sure the vehicle is level.
2. Shift into all range from ”P” to ”1” and return to ”P”
with engine idling.
3. Remove the transaxle fluid dipstick and check the
transaxle fluid level.
4. The correct fluid level must be between the HOT
MIN and the HOT MAX notches on the dipstick.
5. If the fluid level is below the MIN notch, add trans-
axle fluid through the fluid filler tube and check for
leaks in the transaxle.
6. If the fluid above the MAX notch, the transaxle is
overfilled. Drain some of the fluid through the fluid
pan drain plug. Check the transaxle fluid level.
FLUID DRAIN PROCEDURE
Draining Procedure
1. Raise and support the vehicle. Refer to ”Vehicle
Lifting Procedures,” Section 0B, General Informa-
tion.
2. Place a suitable fluid drainage container under the
transaxle.
3. Remove the fluid drain plug. allow the fluid to drain
completely.
4. Clean the drain plug threads.
5. Install the fluid drain plug.
Tighten
Torque the fluid drain plug to 17 NSm (13 Ib–ft).

5A2 – 112IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
7. Disconnect the input shaft speed (ISS) sensor elec-
trical connector.
8. Disconnect the output shaft speed (OSS) sensor
electrical connector.
9. Disconnect the Transmission Range (TR) Switch
electrical connector.
10. Disconnect the transaxle electrical connector.
11. Remove the service hall cover.
12. Remove the three torque converter bolts.
13. Remove the damping block connection nut and
bolt.
14. Remove the rear mounting bracket bolts and rear
mounting bracket.
15. Remove the three upper transaxle mounting brack-
et bolts.

AISIN AUTOMATIC TRANSAXLE 5A2 – 115
DAEWOO V–121 BL4
5. Install the rear mounting bracket bolts and the
bracket.
Tighten
Tighten the rear mounting bracket bolts to 60 NSm (44
Ib–ft).
6. Install the damping block connection nut and bolt.
Tighten
Tighten the damping block connection nut and bolt to
80 NSm (59 Ib–ft).
7. Install the torque converter bolts.
Tighten
Tighten the torque converter bolts to 45 NSm (33 Ib–
ft).
8. Install the service hall cover.
9. Connect the transaxle electrical connector.
10. Connect the TR switch electrical connector.
11. Connect the OSS sensor electrical connector.
12. Connect the ISS sensor electrical connector.
13. Remove engine support fixture DW110–060.
14. Connect the shift control cable into the transaxle.
Refer to ”Shift Control Cable” in this section.

AISIN AUTOMATIC TRANSAXLE 5A2 – 141
DAEWOO V–121 BL4
20. Install the differential gear to the transaxle case.
21. Install the transaxle housing and tighten the 16
bolts of the transaxle housing temporarily.
22. Tighten 8 or 9 bolts out of 16 bolts of the transaxle
housing completely.
Tighten
Tighten the bolt to 29 NSm (22 lb–ft).
23. Using differential preload adapter DW240–130, turn
the differential gear assembly right and left 2 or 3
times to allow the bearing settle.
24. Using differential preload adapter DW240–130 and
small torque wrench, measure the preload of the
differential gear.
Notice : Note down the measured valve.

5A2 – 142IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
25. Remove the transaxle housing and install the
counter driven gear.
26. Install the transaxle housing and tighten the 16
bolts of the transaxle housing temporarily.
27. Tighten the bolts of the transaxle housing in the
same manner as in step 22.
Tighten
Tighten the bolts to 29 NSm (22 lb–in).
28. Using differential preload adapter DW240–130, turn
the differential gear assembly right and left 2 or 3
times to allow the bearing settle.
29. Using differential preload adapter DW240–130 and
a small torque wrench, measure the preload of the
differential gear. From this valve deduct the valve
measured in step 23. This is the preload of the
counter driven gear.
S Preload:
New bearing: 0.33–0.76 NSm (3.21–6.77 lb–in)
Used bearing: 0.17–0.38 NSm (1.48–3.39 lb–in)

AISIN AUTOMATIC TRANSAXLE 5A2 – 149
DAEWOO V–121 BL4
54. Using a small torque wrench, while turning to count-
er drive gear 100 turn per minute and measure the
preload.
Notice : When the preload is smaller than the specifica-
tion, tighten the nut more and adjust the preload. Preload:
0.05–0.35 NSm (0.43–3.12 lb–in)
Tighten
Tighten the nut to 29 NSm (22 lb–ft) or less.
55. Stake the nut.
56. Install the planetary gear to the transaxle case.
57. Coat the planetary carrier thrust washer with petro-
leum jelly and install it onto the planetary gear.
58. Install the No.2 one–way clutch to the transaxle
case.

5A2 – 166IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
138. Install the control lever, washer and nut.
Tighten
Tighten the nut to 12 NSm (106 lb–in).
139. Install the torque converter to the transaxle.
140. Measure the installation depth of the torque
converter. Standard value: 11.1 mm
If the measured value is beyond the standard
value, readjust the torque converter within the
specified value.