2004 DAEWOO LACETTI aisin automatic transaxle

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.

AISIN AUTOMATIC TRANSAXLE 5A2 – 47
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0705
TRANSMISSION RANGE (TR) SWITCH CIRCUIT
MALFUNCTION
Conditions for Setting the DTC
S TCM detects more than two equal signals from the
Park/Neutral Position switch circuit for 10 seconds
continuously.
S TCM detects the no signal of TR switch circuit for 2
seconds continuously.
S Vehicle speed is 30 km/h (19 mph) or greater.
S Engine revolution is 1500 rpm or greater.
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.
S TCM judges with the priority. (D>2>1>R>N>P)
S No timing solenoid control for N–D
S No self–learning control
S No lockupS 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 single ”D range” signal of the TR
switch.
Cause of Failure
S Wiring harness or connector between TR switch
and TCM
S TR switch
S TCM

5A2 – 48IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DTC P0705 Transmission Range (TR) Switch Circuit Malfunction
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 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 P0705 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 continuity between the vehicle har-
ness and the Transmission Range (TR) Switch.
3. Disconnect the TCM connector (X–1) of the
vehicle harness and inspect the continuity for
the each terminal according to the position of
the select lever.
P : B20
R : B1
N : B8
D : B7
2 : B19
1 : B18
Does the inspection OK?–Go 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
TCM connectors (C–1).
Is the connection condition OK?–Go to Step 6Repair the wir-
ing harness
connectors.
51. Estimate the failure of between the vehicle har-
ness and TR switch.
2. Disconnect the connector (X–2) of the vehicle
harness and inspect the continuity between the
terminals. Refer to ”Wiring Harness and Con-
nector Inspection” in this section.
Is the condition of TR switch OK?–Go to Step 7Replace the TR
switch.

AISIN AUTOMATIC TRANSAXLE 5A2 – 49
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
61. Replace the master TCM.
2. Perform the reproducing test under user condi-
tion after confirming no DTC.
Is DTC displayed?–Repair the tem-
porary connec-
tion failure of
connector (Re-
fer to ”Wiring
Harness and
Connector In-
spection” in this
section).Replace the
TCM.
71. Estimate the failure of the vehicle harness.
2. Inspect continuity and short circuit for the ve-
hicle harness and inspect the connection con-
dition between connectors (C–2). Refer to ”Wir-
ing Harness and Connector Inspection” in this
section.
Is the condition OK?–Repair the tem-
porary connec-
tion failure of
connectorReplace the ve-
hicle harness
or adjustment
between con-
nectors.

5A2 – 50IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P0712
TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR
CIRCUIT LOW INPUT
Conditions for Setting the DTC
S TCM detects that A/D value of Transmission Fluid
Temperature sensor (TFT) signal is less than 10 for
5 minutes continuously after 1 time of this detec-
tion. (A/D VALUE 10: 24mV)
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 TCM judges the temperature of the transmission
fluid is 200°C (392°F).
S No lockup control
S No 4th gear
S No self–learning control
S No timing solenoid control N–DConditions 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 temperature of the transmission
fluid is between 0°C (32°) and 150°C (302°F) for
10 seconds continuously.
Cause of Failure
S Wiring harness or connector between Transmission
Fluid Temperature (TFT) sensor and TCM
S TFT sensor
S TCM

AISIN AUTOMATIC TRANSAXLE 5A2 – 51
DAEWOO V–121 BL4
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit
Low Input
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 P0712 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 resistance between the vehicle har-
ness and Transmission Fluid Temperature
(TFT) sensor. Refer to ”Unit Inspection” in this
section.
3. Disconnect the TCM connector (X–1) and in-
spect the resistance between the terminal A11
and A12.
Is the measurement within the specified value?10°C (50°F):
5.80–7.09 kW
11 0°C (230°F):
0.231–0.263
kWGo 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 between the vehicle har-
ness and TFT sensor.
2. Disconnect the connector (X–3) of T/M wire
and inspect the resistance between TFT sen-
sor connector terminal 1 and 6.
Is the measurement within the specified value?10°C (50°F):
5.80–7.09 kW
11 0°C (230°F):
0.231–0.263
kWGo to Step 7Go to Step 8

5A2 – 52IAISIN AUTOMATIC TRANSAXLE
DAEWOO V–121 BL4
StepNo Yes Value(s) Action
61. Replace the master TCM.
2. Perform the reproducing test under user condi-
tion after confirming no DTC.
Is DTC displayed?–Repair the tem-
porary connec-
tion failure of
connector (Re-
fer to ”Wiring
Harness and
Connector In-
spection” in this
section).Replace the
TCM.
71. Estimate the failure of the vehicle wiring har-
ness or between connectors.
2. Inspect continuity and short circuit for the ve-
hicle wiring harness and inspect the connection
condition between connectors (C–3). Refer to
”Wiring Harness and Connector Inspection” in
this section.
Is the condition OK?–Repair the tem-
porary connec-
tion failure of
connectorReplace the ve-
hicle harness
or adjustment
between con-
nectors
81. Estimate the failure of T/M wire or between
connectors of TFT sensor.
2. Inspect fluid temperature. Refer to ”Unit In-
spection” in this section.
Is the problem found?–Replace TFT
sensorGo to Step 9
91. Estimate the failure of T/M wire.
Inspect continuity and short circuit for the T/M wire
and inspect the connection condition between con-
nectors (C–3). Refer to ”Wiring Harness and Con-
nector Inspection” in this section.
Is the condition OK?–Repair the tem-
porary connec-
tion failure of
connectorReplace the
T/M wire or ad-
justment be-
tween connec-
tors