2004 DAEWOO LACETTI automatic transmission

5A2 – 20IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
1. Transaxle Housing
2. Oil Seal
3. Oil Reservoir Plate
4. Transaxle Oil Apply Pipe
5. Differential Gear Oil Apply Pipe
6. Transaxle Oil Apply Pipe Clamp
7. Spring
8. Check Valve Pipe Clamp
9. Apply Gasket
10. Brake Drun Gasket
11. Transaxle Wire
12. O–ring
13. Valve Body
14. Parking Lock Pawl
15. Parking Lock Pawl Shaft
16. Torsion Spring
17. Manual Valve lever Shaft
18. Manual Valve Lever
19. Parking Lock Rod
20. Parking Lock Pawl Bracket
21. Manual Detent Spring
22. Pin
23. Spacer24. Oil Seal
25. Transmission Range (TR) Switch
26. Lock Washer
27. Control Lever
28. Washer
29. Gasket
30. Oil Strainer
31. Oil Pan
32. Gasket
33. Magnet
34. Direct Clutch Accumulator Piston
35. O–ring
36. Spring
37. O–ring
38. Forward Clutch Accumulator Piston
39. O–ring
40. Spring
41. O–ring
42. Overdrive Brake Accumulator Piston
43. O–ring
44. O–ring
45. Spring

5A2 – 26IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
X–1 : TCM Vehicle Side Wiring Connector
A1GroundB1R
A2Pressure Control Solenoid GroundB3Clock
A4Pressure Control SolenoidB4Hold
A5Lock–Up SolenoidB6Input Speed Sensor
A6Ignition (+)B7D
A7CAN (Low)B8N
A11Transmission Fluid Temperature SensorB16Input Speed Sensor Ground
A12Transmission Fluid Temperature Sensor
GroundB18L
A14Timing SolenoidB192
A15Shift Solenoid No.2B20P
A16Shift Solenoid No.1B22Stop Lamp Switch
A17CAN (High)B23DLC
A23GroundB25Output Speed Sensor
A24B+––
X–2 : Transmission Range (TR) Switch Connector
1P
2R
3Ground
42
5N
6ST(–)
7D
81
9ST(+)
X–4 : Output Speed Sensor Connector
1Ignition
2Ground
3Output Speed Sensor
X–3 : Transaxle Wiring Connector
1Transmission Fluid Temperature Sensor
2Timing Solenoid
3Pressure Control Solenoid
4Lock–Up Solenoid
5Shift Solenoid No.1
6Transmission Fluid Temperature Sensor
Ground
8Pressure Control Solenoid Ground
10Shift Solenoid No.2
X–5 : Input Speed Sensor
1Input Speed Sensor Ground
2Input 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.

AISIN AUTOMATIC TRANSAXLE 5A2 – 43
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0601
INTERNAL CONTROL MODULE MEMORY CHECKSUM
ERROR
Conditions for Setting the DTC
S The Transmission Control Module (TCM) detects a
difference between the calculated checksum data
and rear checksum data.
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 con-
secutive ignition cycle.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 Harness or connector between TCM and ECM
S ECM
S TCM

5A2 – 44IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DTC P0601 Internal Control Module Memory Checksum 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 cycle.
Is the Malfunction Indicator Lamp (MIL) ON?–Go to Step 2Inspect Trans-
mission Control
Module (TCM)
wiring harness
and connector
for signs of an
intermittent
condition. Re-
pair as neces-
sary.
21. Select Request DTC by Status from the Diag-
nostic Trouble Codes Information menu.
2. Request DTC by Status.
Is DTC P0601 displayed?–Replace the
Transmission
Control Module
(TCM)Inspect Trans-
mission Control
Module (TCM)
wiring harness
and connector
for signs of an
intermittent
condition. Re-
pair as neces-
sary.

AISIN AUTOMATIC TRANSAXLE 5A2 – 45
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0604
INTERNAL TRANSMISSION CONTROL MODULE (TCM)
RANDOM ACCESS MEMORY (RAM) ERROR
Conditions for Setting the DTC
S The Transmission Control Module (TCM) cannot
carry out the four RAM initialization routines.
S TCM detects that the RAM cannot be written and
read correctly.
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 cycle.
Conditions for Clearing the DTCS 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 Harness or connector between TCM and ECM
S ECM
S TCM

5A2 – 46IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DTC P0604 Internal Transmission Control Module (TCM) Random
Access Memory (RAM) 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 two vehicle drive cycles.
Is the Malfunction Indicator Lamp (MIL) ON?–Go to Step 2Inspect Trans-
mission Control
Module (TCM)
wiring harness
and connector
for signs of an
intermittent
condition. Re-
pair as neces-
sary.
21. Select Request DTC by Status from the Diag-
nostic Trouble Codes Information menu.
2. Request DTC by Status.
Is DTC P0604 displayed?–Replace the
Transmission
Control module
(TCM)Inspect Trans-
mission Control
Module (TCM)
wiring harness
and connector
for signs of an
intermittent
condition. Re-
pair as neces-
sary.