TROUBLE DIAGNOSIS
AT-75
< SERVICE INFORMATION >
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SELF-DIAGNOSTIC RESULT MODE
After performing AT-78, "Diagnosis Procedure without CONSULT-III" , place check marks for results on the AT-
40, "How to Perform Trouble Diagnosis for Quick and Accurate Repair" . Reference pages are provided follow-
ing the items.
Display Items List
LINE PRES DTY Line pressure low ⇔ Line pressure high 0 % ⇔ 94 %
TCC S/V DUTY Lock-up OFF ⇔ Lock-up ON 4 % ⇔ 94 % Item name Condition Display value (Approx.)
Items (CONSULT-III
screen terms)Malfunction is detected when...OBD-II (DTC)
Reference
page MIL indicator
lamp*1, “EN-
GINE” with
CONSULT-III
or GST
CAN COMM CIRCUIT• When TCM is not transmitting or receiving CAN communication signal
for 2 seconds or more.U1000AT- 8 3
PNP SW/CIRC• TCM does not receive the correct voltage signal (based on the gear
position) from the switch.P0705AT- 8 6
ATF TEMP SEN/CIRC • TCM receives an excessively low or high voltage from the sensor. P0710AT- 9 1
VHCL SPEED SEN-A/T • TCM does not receive the proper voltage signal from the sensor. P0720AT- 9 6
ENGINE SPEED SIG • TCM does not receive the proper voltage signal from the ECM. P0725AT- 1 0 1
A/T 1ST GR FNCTN• A/T cannot be shifted to the 1st gear position even if electrical circuit
is good.P0731*2AT- 1 0 5
A/T 2ND GR FNCTN• A/T cannot be shifted to the 2nd gear position even if electrical circuit
is good.P0732*2AT- 1 0 8
A/T 3RD GR FNCTN• A/T cannot be shifted to the 3rd gear position even if electrical circuit
is good.P0733*2AT- 111
A/T 4TH GR FNCTN• A/T cannot be shifted to the 4th gear position even if electrical circuit
is good.P0734*2AT- 11 4
T/C CLUTCH SOL/V• TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve.P0740AT- 11 9
A/T TCC S/V FNCTN • A/T cannot perform lock-up even if electrical circuit is good.
P0744*2AT- 1 2 4
LINE PRESSURE S/V• TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve.P0745AT- 1 2 9
SHIFT SOLENOID/V A• TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve.P0750AT- 1 3 4
SHIFT SOLENOID/V B• TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve.P0755 AT- 1 3 9
OVERRUN CLUTCH S/
V• TCM detects an improper voltage drop when it tries to operate the so-
lenoid valve.P1760AT- 1 4 4
VHCL SPEED SEN-
MTR• TCM does not receive the proper voltage signal from the sensor. —AT- 1 4 9
BATT/FLUID TEMP
SEN• TCM receives an excessively low or high voltage from the sensor. —AT- 1 5 2
TURBINE SENSOR • TCM does not receive proper voltage signal from sensor. —AT- 1 5 8
CONTROL UNIT (RAM) • TCM memory (RAM) is malfunctioning. —AT- 1 6 3
AT-76
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*1: Refer to AT- 3 8 , "Malfunction Indicator Lamp (MIL)" .
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
DATA MONITOR MODE
Display Items List
X: Standard, —: Not applicable, : Option
CONTROL UNIT (ROM) • TCM memory (ROM) is malfunctioning. —AT- 1 6 3
No failure
(NO SELF DIAGNOS-
TIC FAILURE INDICAT-
ED FURTHER
TESTING MAY BE RE-
QUIRED)• No failure has been detected. — — Items (CONSULT-III
screen terms)Malfunction is detected when...OBD-II (DTC)
Reference
page MIL indicator
lamp*1, “EN-
GINE” with
CONSULT-III
or GST
Monitored item (Unit)Monitor Item Selection
Remarks
TCM INPUT
SIGNALSMAIN SIG-
NALSSELEC-
TION FROM
MENU
VHCL/S SE-A/T (km/h)X — Revolution sensor
VHCL/S SE-MTR (km/h) X —Vehicle speed display may not be accu-
rate under approx. 10 km/h (6 mph). It
may not indicate 0 km/h (0 mph) when
vehicle is stationary.
THRTL POS SEN (V) X —
FLUID TEMP SE (V) X —
BATTERY VOLT (V) X —
ENGINE SPEED (rpm) X X
TURBINE REV (rpm) X —
OVERDRIVE SW (ON/OFF) X —
PN POSI SW (ON/OFF) X —
R POSITION SW (ON/OFF) X —
D POSITION SW (ON/OFF) X —
2 POSITION SW (ON/OFF) X —
1 POSITION SW (ON/OFF) X —
ASCD-CRUISE (ON/OFF) X —
Signal input with CAN communication.
ASCD-OD CUT (ON/OFF) X —
KICKDOWN SW (ON/OFF) X —
Not mounted but displayed.
POWERSHIFT SW (ON/OFF) X —
CLOSED THL/SW (ON/OFF) X —
Signal input with CAN communication.
W/O THRL/P-SW (ON/OFF) X —
TROUBLE DIAGNOSIS
AT-77
< SERVICE INFORMATION >
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CAN DIAGNOSTIC SUPPORT MONITOR MODE
Refer to LAN-12, "CAN Diagnostic Support Monitor".
DTC WORK SUPPORT MODE
Display Items List
*SHIFT S/V A (ON/OFF) — —
Displays status of check signal (reinput
signal) for TCM control signal output. Re-
mains unchanged when solenoid valves
are open or shorted. *SHIFT S/V B (ON/OFF) — —
*OVRRUN/C S/V (ON/OFF) — —
HOLD SW (ON/OFF) X — Not mounted but displayed.
BRAKE SW (ON/OFF) X —Stop lamp switch (Signal input with CAN
communication)
GEAR — XGear position recognized by the TCM up-
dated after gear-shifting
SLCT LVR POSI — XSelector lever position is recognized by
the TCM.
For fail-safe operation, the specific value
used for control is displayed.
VEHICLE SPEED (km/h) — X Vehicle speed recognized by the TCM.
THROTTLE POSI (0.0/8) — XDegree of opening for accelerator recog-
nized by the TCM
For fail-safe operation, the specific value
used for control is displayed.
LINE PRES DTY (%) — X
TCC S/V DUTY (%) — X
SHIFT S/V A (ON/OFF) — X
SHIFT S/V B (ON/OFF) — X
OVERRUN/C S/V (ON/OFF) — X
SELF-D DP LMP (ON/OFF) — X
TC SLIP RATIO (0.000) — —
TC SLIP SPEED (rpm) — —Difference between engine speed and
torque converter input shaft speed
Voltage (V) — —Displays the value measured by the volt-
age probe.
Frequency (Hz) — —
The value measured by the pulse probe
is displayed. DUTY-HI (high) (%) — —
DUTY-LOW (low) (%) — —
PLS WIDTH-HI (ms) — —
PLS WIDTH-LOW (ms) — —Monitored item (Unit)Monitor Item Selection
Remarks
TCM INPUT
SIGNALSMAIN SIG-
NALSSELEC-
TION FROM
MENU
AT-86
< SERVICE INFORMATION >
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH
DescriptionINFOID:0000000001703201
• The PNP switch assembly includes a transaxle range switch.
• The transaxle range switch detects the selector lever position and sends a signal to the TCM.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703202
On Board Diagnosis LogicINFOID:0000000001703203
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0705 PNP SW/CIRC” with CONSULT-III is detected when TCM does not receive
the correct voltage signal from the switch based on the gear position.
Possible CauseINFOID:0000000001703204
• Harness or connectors
[The PNP switch circuit is open or shorted.]
• PNP switch
DTC Confirmation ProcedureINFOID:0000000001703205
CAUTION:
• Always drive vehicle at a safe speed.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-III.
3. Touch “START”.
4. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VEHICLE SPEED: 10 km/h (6 MPH) or more
THROTTLE POSI: More than 1.0/8
SLCT LVR POSI: “D” position
5. If the check result is NG, go to AT-88, "
Diagnosis Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value
PN POSI SWWhen setting selector lever to “N” or “P” position. ON
When setting selector lever to other positions. OFF
R POSITION SWWhen setting selector lever to “R” position. ON
When setting selector lever to other positions. OFF
D POSITION SWWhen setting selector lever to “D” position. ON
When setting selector lever to other positions. OFF
2 POSITION SWWhen setting selector lever to “2” position. ON
When setting selector lever to other positions. OFF
1 POSITION SWWhen setting selector lever to “1” position. ON
When setting selector lever to other positions. OFF
AT-88
< SERVICE INFORMATION >
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH
Diagnosis Procedure
INFOID:0000000001703207
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-III.
3. Read out “P·N”, “R”, “D”, “2” and “1” position switches moving selector lever to each position.
OK or NG
OK >> GO TO 6.
NG >> GO TO 3.
2.CHECK INPUT SIGNAL
Without CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground
while moving selector lever through each position.
B: Battery voltage
0: 0V
OK or NG
OK >> GO TO 6.
Item name Condition Display value
PN POSI SWWhen setting selector lever to “N” or “P” posi-
tion.ON
When setting selector lever to other positions. OFF
R POSITION SWWhen setting selector lever to “R” position. ON
When setting selector lever to other positions. OFF
D POSITION SWWhen setting selector lever to “D” positions. ON
When setting selector lever to other positions. OFF
2 POSITION SWWhen setting selector lever to “2” position. ON
When setting selector lever to other positions. OFF
1 POSITION SWWhen setting selector lever to “1” position. ON
When setting selector lever to other positions. OFF
Selector lever positionTe r m i n a l
36 35 34 27 26
P, N B0000
R 0B000
D00B00
20 00B0
1 0000B
SCIA7162E
DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
AT-91
< SERVICE INFORMATION >
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DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
DescriptionINFOID:0000000001703209
The A/T fluid temperature sensor detects the A/T fluid temperature and sends a signal to the TCM.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703210
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703211
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0710 ATF TEMP SEN/CIRC” with CONSULT-III is detected when TCM receives
an excessively low or high voltage from the sensor.
Possible CauseINFOID:0000000001703212
• Harness or connector
(The sensor circuit is open or shorted.)
• A/T fluid temperature sensor
DTC Confirmation ProcedureINFOID:0000000001703213
CAUTION:
• Always drive vehicle at a safe speed.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode for “A/T” with CONSULT-III.
2. Touch “START”.
3. Start engine and maintain the following conditions for at least 10 minutes (Total). (It is not necessary to
maintain continuously.)
ENGINE SPEED: 450 rpm or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
THROTTLE POSI: More than 1.0/8
SLCT LVR POSI: “D” position
4. If the check result is NG, go to AT-92, "
Diagnosis Procedure".
WITH GST
Follow the procedure “With CONSULT-III”.
Item name Condition Display value (Approx.)
FLUID TEMP SEWhen A/T fluid temperature is 20°C (68°F). 1.5 V
When A/T fluid temperature is 80°C (176°F). 0.5 V
DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
AT-93
< SERVICE INFORMATION >
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With CONSULT-III
1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-III.
3. Read out the value of “FLUID TEMP SE”.
Without CONSULT-III
1. Start engine.
2. Check voltage TCM connector terminals while warming up A/T.
OK or NG
OK >> GO TO 7.
NG >> GO TO 2.
2.DETECT MALFUNCTIONING ITEMS
Check the following.
• Harness for short or open between TCM, ECM and terminal cord assembly
• Ground circuit for ECM, Refer to EC-137
.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK FLUID TEMPERATURE SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the TCM connector.
3. Check resistance between TCM connector terminals.
OK or NG
OK >> GO TO 7.
NG >> GO TO 4.
4. CHECK HARNESS BETWEEN TCM AND TERMINAL CORD ASSEMBLY HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly harness connector and TCM connector.
Item name ConditionDisplay value
(Approx.)
FLUID TEMP
SEWhen A/T fluid temperature is 20°C (68°F). 1.5 V
When A/T fluid temperature is 80°C (176°F). 0.5 V
ItemConnec-
torTerminal ConditionJudge-
ment stan-
dard
(Approx.)
A/T fluid
temperature
sensorE32 47 - 42When A/T fluid tempera-
ture is 20°C (68°F).1.5 V
When A/T fluid tempera-
ture is 80°C (176°F).0.5 V
SCIA2658E
Item Connector Terminal Te m p e r a -
ture [°C (°F)]Resistance
(Approx.)
A/T fluid
temperature
sensorE32 47 - 4220 (68) 2.5 kΩ
80 (176) 0.3 kΩ
SCIA2338E
AT-96
< SERVICE INFORMATION >
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
DescriptionINFOID:0000000001703217
The revolution sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal.
The pulse signal is sent to the TCM which converts it into vehicle speed.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703218
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703219
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0720 VHCL SPEED SEN-AT” with CONSULT-III or 1st judgement flicker without
CONSULT-III is detected when TCM does not receive the proper voltage signal from the sensor.
Possible CauseINFOID:0000000001703220
• Harness or connector
(The sensor circuit is open or shorted.)
• Revolution sensor
DTC Confirmation ProcedureINFOID:0000000001703221
CAUTION:
• Always drive vehicle at a safe speed.
• Be careful not to rev engine into the red zone on the tachometer.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode for “A/T” with CONSULT-III.
2. Touch “START”.
3. Drive vehicle and check for an increase of “VHCL/S SE-MTR” value.
If the check result is NG, go to AT-98, "
Diagnosis Procedure" .
If the check result is OK, go to following step.
4. Select “DATA MONITOR” mode for “A/T” with CONSULT-III.
5. Touch “START”.
6. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VEHICLE SPEED: 30 km/h (19 MPH) or more
THROTTLE POSI: More than 1.0/8
SLCT LVR POSI: “D” position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
If the check result is NG, go to AT-98, "
Diagnosis Procedure" .
If the check result is OK, go to following step.
7. Maintain the following conditions for at least 5 consecutive seconds.
ENGINE SPEED: 3,500 rpm or more
THROTTLE POSI: More than 1.0/8
SLCT LVR POSI: “D” position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
WITH GST
Follow the procedure “WITH CONSULT-III”.
WITHOUT CONSULT-III
1. Start engine.
Item name Condition Display value
VHCL/S SE-A/T During driving Approximately matches the speedometer reading.