TM-404
< COMPONENT DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
A/T 4TH GEAR FUNCTION
3. Make sure that output voltage of A/T fluid temperature sensor is within the range below.
FLUID TEMP SE: 0.4 - 1.5V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the
voltage (cool down the fluid).
4. Select “4TH GR FNCTN P0734” of “DTC WORK SUPPORT” mode for “TRANSMISSION” with CON-
SULT-III and touch “START”.
5. Accelerate vehicle to 55 to 65 km/h (34 to 40 MPH) under the following conditions and release the accel-
erator pedal completely.
THROTTLE POSI: Less than 5.5/8 (at all times during step 4)
SLCT LVR POSI: “D” position
-Make sure that “GEAR” shows “3” after releasing pedal.
6. Depress accelerator pedal steadily with 1.0/8 - 2.0/8 of “THROTTLE POSI” from a speed of 55 to 65 km/h
(34 to 40 MPH) until “TESTING” has turned to “STOP VEHICLE” or “COMPLETED”. (It will take approxi-
mately 3 seconds.)
If the check result NG appears on CONSULT-III screen, go to TM-404, "
Diagnosis Procedure".
If “STOP VEHICLE” appears on CONSULT-III screen, go to following step.
-Make sure that “GEAR” shows “4” when depressing accelerator pedal with 1.0/8 - 2.0/8 of
“THROTTLE POSI”.
-If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS” for
“A/T”. In case a DTC other than “A/T 4TH GR FNCTN” is shown, refer to XX-XX, "*****"
.
7. Stop vehicle.
8. Follow the instruction displayed. (Check for normal shifting referring to the table below.)
9. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “Diagnostic Procedure”.)
Refer to TM-404, "
Diagnosis Procedure".
Refer to XX-XX, "*****"
.
Diagnosis ProcedureINFOID:0000000001713095
1.CHECK SHIFT-UP (D3 TO D4)
During XX-XX, "*****"
.
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 11.
NO >> GO TO 2.
2.CHECK LINE PRESSURE
Perform line pressure test. Refer to XX-XX, "*****"
.
OK or NG
OK >> GO TO 3.
NG >> GO TO 7.
3.CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to XX-XX, "*****"
.
- Shift solenoid valve A
- Shift solenoid valve B
Vehicle condition Gear on actual transmission shift pattern when screen is changed to 1 → 2 → 3 → 4
No malfunction exists 1 → 2 → 3 → 4
Malfunction for “A/T 4TH GR FNCTN” exists.2 → 2 → 3 → 3
1 → 2 → 2 → 1
SCIA7190E
TM-408
< COMPONENT DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
A/T TCC S/V FUNCTION (LOCK-UP)
A/T TCC S/V FUNCTION (LOCK-UP)
DescriptionINFOID:0000000001713096
This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosis
malfunction.
This malfunction is detected when the A/T does not shift into fourth gear position or the torque converter
clutch does not lock-up as instructed by the TCM. This is not caused by electrical malfunction (circuits open
or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation,
malfunctioning oil pump or torque converter clutch, etc.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001713097
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001713098
Diagnostic trouble code “A/T TCC S/V FNCTN” with CONSULT-III is detected when A/T cannot perform
lock-up even if electrical circuit is good.
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM
as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is much lower than the position (4th) supposed by TCM, the slip ratio will be much
less than normal. In case the ratio does not reach the specified value, TCM judges this diagnosis malfunc-
tion.
This malfunction will be caused when shift solenoid valve B is stuck closed.
Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve B stuck closed: 1, 2, 2 and 1* positions to each gear position
above
*: “A/T TCC S/V FNCTN” is detected.
Possible CauseINFOID:0000000001713099
Line pressure solenoid valve
Torque converter clutch solenoid valve
Each clutch
Hydraulic control circuit
DTC Confirmation ProcedureINFOID:0000000001713100
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. Start engine and select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Touch “START”.
3. Make sure that output voltage of A/T fluid temperature sensor is within the range below.
FLUID TEMP SE: 0.4 - 1.5V
If out of range, drive vehicle to decrease voltage (warm up the fluid) or stop engine to increase voltage
(cool down the fluid).
4. Select “TCC S/V FNCTN P0744” of “DTC WORK SUPPORT” mode for “TRANSMISSION” with CON-
SULT-III and touch “START”.
Item name Condition Display value (Approx.)
TCC S/V DUTY Lock-up OFF ⇔ Lock-up ON 4% ⇔ 94%
PNP, OD SWITCH AND CLOSED THROTTLE, WIDE OPEN THROTTLE POSI-
TION SIGNAL CIRCUIT
TM-417
< COMPONENT DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
C
E
F
G
H
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K
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MA
B
TM
N
O
P
2. Check voltage between A/T device harness connector terminal
and ground.
OK or NG
OK >> GO TO 10.
NG >> GO TO 8.
8.CHECK OVERDRIVE CONTROL SWITCH
1. Turn ignition switch OFF.
2. Disconnect A/T device harness connector.
3. Check continuity between A/T device harness connector termi-
nals.
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9.DETECT MALFUNCTIONING ITEM
Check the following.
Harness for short or open between combination meter and A/T device harness connector
Harness for short or open between A/T device harness connector and ground
Combination meter.
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
10.CHECK CLOSED THROTTLE POSITION AND WIDE OPEN THROTTLE POSITION SIGNAL CIRCUIT
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for TRANSMISSION with CONSULT-III.
3. Read out “CLOSED THL/SW” and “W/O THRL/P-SW” depressing and releasing accelerator pedal.
Check that the signals of throttle position are indicated properly.
OK or NG
OK >> GO TO 11.
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
Accelerator pedal position sensor. Refer to XX-XX, "*****"
.
Item Connector TerminalOverdrive
control switch
ConditionJudge-
ment
standard
(Approx.)
A/T device harness
connector (Overdrive
control switch)M38 1 - GroundReleasedBattery
voltage
Depressed 0V
SCIA5336E
Item Connector TerminalOverdrive control
switch conditionContinuity
A/T device harness con-
nector (Overdrive con-
trol switch)M38 1 - 2Released No
Depressed Yes
SCIA5330E
Accelerator pedal conditionData monitor
CLOSED THL/SW W/O THRL/P-SW
Released ON OFF
Fully depressed OFF ON
TM-422
< ECU DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
TCM
ECU DIAGNOSIS
TCM
Reference ValueINFOID:0000000001714339
REFERENCE VALUES
NOTICE:
1. The CONSULT-III electrically displays shift timing and lock-up timing (that is, operation timing of each
solenoid).
Check for time difference between actual shift timing and the CONSULT-III display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) displayed on CONSULT-III and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:
- Actual shift schedule has more or less tolerance or allowance,
- Shift schedule indicated in Service Manual refers to the point where shifts start, and
- Gear position displayed on CONSULT-III indicates the point where shifts are completed.
3. Shift solenoid valve “A” or “B” is displayed on CONSULT-III at the start of shifting. Gear position is dis-
played upon completion of shifting (which is computed by TCM).
Item name Condition Display value (Approx.)
VHCL/S SE-A/T
During drivingApproximately matches the speedometer
reading.
VHCL/S SE-MTR
THROTTLE POSIReleased accelerator pedal. 0.0/8
Fully depressed accelerator pedal. 8.0/8
FLUID TEMP SE When A/T fluid temperature is 20°C (68°F). 1.5V
When A/T fluid temperature is 80°C (176°F). 0.5V
BATTERY VOLT When turning ignition switch to “ON”. Battery voltage
ENGINE SPEED Engine runningApproximately matches the tachometer
reading.
TURBINE REV During driving (lock-up ON) Approximately matches the engine speed.
OVERDRIVE SWWhen overdrive control switch is depressed. ON
When overdrive control switch is released. OFF
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
CLOSED THL/SWReleased accelerator pedal. ON
Depressed accelerator pedal. OFF
W/O THRL/P-SWFully depressed accelerator pedal. ON
Released accelerator pedal. OFF
TM-424
< ECU DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
TCM
3GRTorque converter clutch
solenoid valveWhen A/T performs lock-up. 8 - 15V
When A/T does not perform lock-up. 0V
5 L CAN H — —
6 P CAN L — —
10 R Power supplyWhen turning ignition switch to “ON”. Battery voltage
When turning ignition switch to “OFF”. 0V
11 O Shift solenoid valve AWhen shift solenoid valve A operates.
(When driving in “D
1” or “D4”.)Battery voltage
When shift solenoid valve A does not
operate.
(When driving in “D
2” or “D3”.)0V
12 G Shift solenoid valve BWhen shift solenoid valve B operates.
(When driving in “D
1” or “D2”.)Battery voltage
When shift solenoid valve B does not
operate.
(When driving in “D
3” or “D4”.)0V
19 R Power supplyWhen turning ignition switch to “ON”. Battery voltage
When turning ignition switch to “OFF”. 0V
20 VOverrun clutch solenoid
valveWhen overrun clutch solenoid valve op-
erates. (When overrun clutch disen-
gaged. Refer to TM-330
.)Battery voltage
When overrun clutch solenoid valve
does not operate. (When overrun clutch
engaged. Refer to TM-330
.)0V
25 B Ground Always 0V
26 Y PNP switch “1” position
and When setting selector lever to “1” posi-
tion.Battery voltage
When setting selector lever to other po-
sitions.0V
27 G PNP switch “2” positionWhen setting selector lever to “2” posi-
tion.Battery voltage
When setting selector lever to other po-
sitions.0V
28 GRPower supply
(memory back-up)Always Battery voltage
29 V Revolution sensor When driving at 20 km/h (12 MPH) 150 Hz
30
*1BR CONSULT- II (RX) — —
31
*1Y CONSULT- II (TX) — — Te r m i n a lWire
colorItem ConditionJudgement stan-
dard (Approx.)
TCM
TM-425
< ECU DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
C
E
F
G
H
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K
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MA
B
TM
N
O
P
*1: These terminals are connected to the data link connector.
*2: These terminals are connected to the ECM.34 LG PNP switch “D” position
and When setting selector lever to “D” posi-
tion.Battery voltage
When setting selector lever to other po-
sitions.0V
35 SB PNP switch “R” positionWhen setting selector lever to “R” posi-
tion.Battery voltage
When setting selector lever to other po-
sitions.0V
36 RPNP switch “N” or “P”
positionWhen setting selector lever to “N” or “P”
position.Battery voltage
When setting selector lever to other po-
sitions.0V
38 GTurbine revolution sen-
sor (power train revolu-
tion sensor)When driving at 20 km/h (12 MPH) 360 Hz
39
*2L Engine speed signal
and Refer to XX-XX, "*****".
40 O Vehicle speed sensorWhen driving vehicle at 2 to 3 km/h (1 to
2 MPH) for 1 m (3 ft) or more.Voltage varies
between less
than 0V and
more than 4.5V
42 B Sensor ground Always 0V
47 BRA/T fluid temperature
sensor
and When A/T fluid temperature is 20°C
(68°F).1.5V
When A/T fluid temperature is 80°C
(176°F).0.5V
48 B Ground Always 0V Te r m i n a lWire
colorItem ConditionJudgement stan-
dard (Approx.)
TCM
TM-427
< ECU DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
C
E
F
G
H
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MA
B
TM
N
O
P
The SELF-DIAGNOSIS results will be as follows:
The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor.
During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indicated.
FAIL-SAFE FUNCTION
The following fail-safe functions allow vehicles to be driven even when sensor, switch or solenoid malfunction
occurs.
Vehicle Speed Sensor·A/T (Revolution Sensor)
Vehicle speed sensor·MTR signal is input from combination meter.
Accelerator Pedal Position Sensor Signal and Throttle Position Sensor Signal
TCM controls the throttle opening angle to a predetermined fixed position to enable driving if a malfunctioning
signal is input to TCM.
PNP Switch
When the multiple PNP switch signals are input to TCM, the priority of selector lever position becomes “D”,
“N”, “R”, “2” and “1” in order by internal TCM determination.
The use of 4th gear is inhibited until normal operation resumes. Because the hydraulic circuit of the control
valve is switched by manual valve according to the selector lever position, however, actual operating condition
of vehicle becomes as follows.
Shift Solenoid Valve A and B
If non-standard solenoid signal is sent to TCM, use of certain gears is limited. Refer to chart shown below.
●: Solenoid ON
×: Solenoid OFF
–: Non-standard condition
Line Pressure Solenoid Valve
If non-standard solenoid signal is sent to TCM, line pressure solenoid valve is turned OFF to achieve maxi-
mum oil pressure.
Torque Converter Clutch Solenoid Valve
Actual lever position PNP switch input signal Running status
“P” “P” position and other position signals P
“R” “R” position and other position signals R
“N” “N” position and other position signals N
“D” “D” position and other position signals D
1⇔D2⇔D3⇔D4
“2”“2” position and other position signals (Except “1” position) 21⇔22⇔23
“2” position and “1” position signals 21⇔22
“1”“1” position and other position signals (Except “2” position) 11⇔12⇔13
“1” position and “2” position signals 11⇔12
Shift positionNormalMalfunction in solenoid
valve AMalfunction in solenoid
valve BMalfunction in solenoid
valves A and B
A BGearABGearABGearABGear
“D” position●●1st –●→×
3rd ●→×–
3rd ––
3rd ×●2nd –●→× ×–––
××3rd – x×–––
●×4th – x●→×–––
“2” position●●1st –●→×●→×–––
×●2nd –●→× ×–––
××3rd – x×–––
“1” position●●1st –●→×●→×–––
×●2nd –●→× ×–––
××3rd – x×–––
TM-428
< ECU DIAGNOSIS >[TYPE 2 (4AT: RE4F03B)]
TCM
If non-standard solenoid signal is sent to TCM, torque converter clutch solenoid valve is turned OFF to release
lock-up.
Overrun Clutch Solenoid Valve
If non-standard solenoid signal is sent to TCM, overrun clutch solenoid valve is turned OFF to engage overrun
clutch. This will result in more effective engine brake during deceleration.
Alphabetical IndexINFOID:0000000001714344
NOTE:
If DTC “CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis for
DTC “CAN COMM CIRCUIT”. Refer to XX-XX, "*****"
.
X: Applicable, —: Not applicable
Items (CONSULT-II screen terms)TCM self-diagnosis
Reference
page OD OFF indi-
cator lamp“A/T” with
CONSULT-II
A/T 1ST GR FNCTN — XXX-XX, "*****"
A/T 2ND GR FNCTN — XXX-XX, "*****"
A/T 3RD GR FNCTN — XXX-XX, "*****"
A/T 4TH GR FNCTN — XXX-XX, "*****"
A/T TCC S/V FNCTN — XXX-XX, "*****"
BATT/FLUID TEMP SEN X XXX-XX, "*****"
CAN COMM CIRCUIT X XXX-XX, "*****"
CONTROL UNIT (RAM) — XXX-XX, "*****"
CONTROL UNIT (ROM) — XXX-XX, "*****"
ENGINE SPEED SIG X XXX-XX, "*****"
LINE PRESSURE S/V X XXX-XX, "*****"
OVERRUN CLUTCH S/V X XXX-XX, "*****"
SHIFT SOLENOID/V A X XXX-XX, "*****"
SHIFT SOLENOID/V B X XXX-XX, "*****"
T/C CLUTCH SOL/V X XXX-XX, "*****"
THROTTLE POSI SEN X XXX-XX, "*****"
TURBINE SENSOR X XXX-XX, "*****"
VHCL SPEED SEN-A/T X XXX-XX, "*****"
VHCL SPEED SEN-MTR X XXX-XX, "*****"