low oil pressure NISSAN TEANA 2003 Service Manual

AT-3
D
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B
AT
CONSULT-II Reference Value .............................. 167
Diagnostic Procedure ........................................... 167
TROUBLE DIAGNOSIS FOR SYMPTOMS ............ 168
Wiring Diagram — AT — NONDTC ...................... 168
A/T CHECK Indicator Lamp Does Not Come On . 173
Engine Cannot Be Started in “P” and “N” Position . 175
In “P” Position, Vehicle Moves Forward or Backward
When Pushed ....................................................... 176
In “N” Position, Vehicle Moves ............................. 176
Large Shock. “N” → “R” Position .......................... 177
Vehicle Does Not Creep Backward in “R” Position . 179
Vehicle Does Not Creep Forward in “D”, “3”, “2” or
“1” Position ........................................................... 181
Vehicle Cannot Be Started From D
1 ..................... 182
A/T Does Not Shift: D
1 → D2 or Does Not Kickdown:
D
4 → D2 ............................................................... 184
A/T Does Not Shift: D
2 → D3 ............................... 186
A/T Does Not Shift: D
3 → D4 ............................... 188
A/T Does Not Perform Lock-up ............................ 191
A/T Does Not Hold Lock-up Condition ................. 193
Lock-up Is Not Released ...................................... 195
Engine Speed Does Not Return To Idle (Light Brak-
ing D
4 → D3 ) ....................................................... 195
A/T Does Not Shift: D
4 → 33 , When A/T Selector
Lever “D” → “3” .................................................... 197
A/T Does Not Shift: 3
3 → 22 , When Selector Lever
“3” → “2” Position ................................................. 198
A/T Does Not Shift: 2
2 → 11 , When Selector Lever
“2” → “1” Position ................................................. 200
Vehicle Does Not Decelerate By Engine Brake (D
4
→ 3
3 ) ................................................................... 203
Vehicle Does Not Decelerate By Engine Brake (3
3
→ 2
2 ) ................................................................... 205
Vehicle Does Not Decelerate By Engine Brake (2
2
→ 1
1 ) ................................................................... 208
TCM Self-diagnosis Does Not Activate ................ 210
TRANSMISSION CONTROL MODULE ..................211
Removal and Installation ....................................... 211
SHIFT CONTROL SYSTEM ................................... 213
Control Device Removal and Installation ............. 213
Adjustment of A/T Position ................................... 215
Checking of A/T Position ...................................... 215
A/T SHIFT LOCK SYSTEM .................................... 216
Description ........................................................... 216
Shift Lock System Electrical Parts Location ......... 216
Wiring Diagram — AT — SHIFT ........................... 217
Shift Lock Control Unit Reference Values ............ 221
Component Inspection ......................................... 222
ON-VEHICLE SERVICE ......................................... 225
Control Valve Assembly and Accumulators .......... 225
Park/Neutral Position (PNP) Switch ..................... 230
Differential Side Oil Seal Replacement ................ 231
Revolution Sensor Replacement .......................... 233
Turbine Revolution Sensor (Power Train Revolution
Sensor) Replacement .......................................... 234
AIR BREATHER HOSE .......................................... 236
Removal and Installation [Air Breather Hose (Oil
Catch Tank to Air Duct)] ....................................... 236
Removal and Installation [Oil Catch Tank and Air Breather Hose (A/T assembly to Oil catch tank)] . 239
TRANSAXLE ASSEMBLY ......................................241
Removal and Installation ......................................241
OVERHAUL ............................................................246
Components .........................................................246
Oil Channel ...........................................................252
Locations of Adjusting Shims, Needle Bearings and
Thrust Washers ....................................................253
Locations of Snap Rings .......................................254
DISASSEMBLY .......................................................255
Disassembly .........................................................255
REPAIR FOR COMPONENT PARTS .....................272
Manual Shaft ........................................................272
Oil Pump ...............................................................275
Control Valve Assembly ........................................280
Control Valve Upper Body ....................................289
Control Valve Lower Body ....................................293
Reverse Clutch .....................................................296
High Clutch ...........................................................301
Forward and Overrun Clutches ............................307
Low & Reverse Brake ...........................................315
Rear Internal Gear, Forward Clutch Hub and Over-
run Clutch Hub ......................................................319
Output Shaft, Idler Gear, Reduction Pinion Gear and
Bearing Retainer ...................................................323
Band Servo Piston Assembly ...............................329
Final Drive ............................................................335
ASSEMBLY .............................................................339
Assembly (1) .........................................................339
Adjustment (1) ......................................................340
Assembly (2) .........................................................345
Adjustment (2) ......................................................352
Assembly (3) .........................................................355
SERVICE DATA AND SPECIFICATIONS (SDS) ....362
General Specifications ..........................................362
Vehicle Speed Which Gear Shifting Occurs .........362
Vehicle Speed at When Lock-up Occurs/Releases .362
Stall Revolution .....................................................363
Line Pressure .......................................................363
Adjusting shims, Needle Bearings, Thrust Washers
and Snap Rings ....................................................363
Control Valves ......................................................364
Accumulator ..........................................................365
Clutch and Brakes ................................................366
Final Drive ............................................................367
Planetary Carrier and Oil Pump ............................367
Input Shaft ............................................................367
Reduction Pinion Gear .........................................367
Band Servo ...........................................................368
Output Shaft .........................................................368
Bearing Retainer ...................................................368
Total End Play .......................................................368
Reverse Clutch End Play ......................................368
Removal and Installation ......................................368
Shift Solenoid Valves ............................................368
Solenoid Valves ....................................................368
A/T Fluid Temperature Sensor ..............................368
Revolution Sensor ................................................369

A/T CONTROL SYSTEM
AT-33
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Control ValveBCS000ZW
FUNCTION OF CONTROL VALVES
Valve name Function
Pressure regulator valve, plug and sleeve
plugRegulates oil discharged from the oil pump to provide optimum line pressure for all driv-
ing conditions.
Pressure modifier valve and sleeve Used as a signal supplementary valve to the pressure regulator valve. Regulates pres-
sure-modifier pressure (signal pressure) which controls optimum line pressure for all
driving conditions.
Pilot valve Regulates line pressure to maintain a constant pilot pressure level which controls lock-up
mechanism, overrun clutch, shift timing.
Accumulator control valve Regulates accumulator back-pressure to pressure suited to driving conditions.
Manual valve Directs line pressure to oil circuits corresponding to select positions.
Hydraulic pressure drains when the shift lever is in Neutral.
Shift valve A Simultaneously switches three oil circuits using output pressure of shift solenoid valve A
to meet driving conditions (vehicle speed, throttle opening, etc.).
Provides automatic downshifting and upshifting (1st → 2nd → 3rd → 4th gears/4th →
3rd → 2nd → 1st gears) in combination with shift valve B.
Shift valve B Simultaneously switches two oil circuits using output pressure of shift solenoid valve B in
relation to driving conditions (vehicle speed, throttle opening, etc.).
Provides automatic downshifting and upshifting (1st → 2nd → 3rd → 4th gears/4th →
3rd → 2nd → 1st gears) in combination with shift valve A.
Overrun clutch control valve Switches hydraulic circuits to prevent engagement of the overrun clutch simultaneously
with application of the brake band in D
4 . (Interlocking occurs if the overrun clutch
engages during D
4 .)
1st reducing valve Reduces low & reverse brake pressure to dampen engine-brake shock when downshift-
ing from the 1st position 1
2 to 11 .
Overrun clutch reducing valve Reduces oil pressure directed to the overrun clutch and prevents engine-brake shock.
In the 1st and 2nd positions, line pressure acts on the overrun clutch reducing valve to
increase the pressure-regulating point, with resultant engine brake capability.
Torque converter relief valve Prevents an excessive rise in torque converter pressure.
Torque converter clutch control valve, plug
and sleeveActivates or inactivates the lock-up function.
Also provides smooth lock-up through transient application and release of the lock-up
system.
1-2 accumulator valve and piston Lessens the shock find when the 2nd gear band servo contracts, and provides smooth
shifting.
3-2 timing valve Switches the pace that oil pressure is released depending on vehicle speed; maximizes
the high clutch release timing, and allows for soft downshifting.
Shuttle valve Determines if the overrun clutch solenoid valve should control the 3-2 timing valve or the
overrun clutch control valve and switches between the two.
Cooler check valve At low speeds and with a small load when a little heat is generated, saves the volume of
cooler flow, and stores the oil pressure for lock-up.

TROUBLE DIAGNOSIS
AT-35
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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
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.
Shift positionNormalMalfunction in solenoid
valve AMalfunction in solenoid
valve BMalfunction in solenoid
valves A and B
A B Gear A B Gear A B Gear A B Gear
“D” position

1st –
→×
3rd
→×–
3rd ––
3rd ×
2nd –
→× ×–––
××3rd – x×–––

×4th – x
→×–––
“3” position

1st –
→×
→×–––
×
2nd –
→× ×–––
××3rd – x×–––
“2” position

1st –
→×
→×–––
×
2nd –
→× ×–––
××3rd – x×–––
“1” position

1st –
→×
→×–––
×
2nd –
→× ×–––
××3rd – x×–––

TROUBLE DIAGNOSIS
AT-47
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5. Start engine and measure line pressure at idle and stall speed.
CAUTION:

Keep the brake pedal pressed all the way down during
measurement.

When measuring line pressure at stall speed, refer to AT-
43, "STALL TEST" .
Line Pressure
Judgement of Line Pressure Test
SAT493G
Engine speed rpmLine pressure kPa (bar, kg/cm2 , psi)
“D”, “3”, “2” and “1” positions “R” position
Idle 500 (5.00, 5.1, 73) 778 (7.78, 7.9, 113)
Stall 1,233 (12.33, 12.6, 179) 1,918 (19.18, 19.6, 278)
Judgement Suspected parts
At idleLine pressure is low in all positions.

Oil pump wear

Control piston damage

Pressure regulator valve or plug sticking

Spring for pressure regulator valve damaged

Fluid pressure leakage between oil strainer and pressure regulator valve

Clogged strainer
Line pressure is low in particular posi-
tion.

Fluid pressure leakage between manual valve and particular clutch

For example, line pressure is:
− Low in “R” and “1” positions, but
− Normal in “D”, “3” and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to AT-18, "
CLUTCH AND BAND CHART" .
Line pressure is high.

Accelerator pedal position signal malfunction

A/T fluid temperature sensor damaged

Line pressure solenoid valve sticking

Short circuit of line pressure solenoid valve circuit

Pressure modifier valve sticking

Pressure regulator valve or plug sticking

Open in dropping resistor circuit
At stall
speedLine pressure is low.

Accelerator pedal position signal malfunction

Line pressure solenoid valve sticking

Short circuit of line pressure solenoid valve circuit

Pressure regulator valve or plug sticking

Pressure modifier valve sticking

Pilot valve sticking

TROUBLE DIAGNOSIS
AT-59
D
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Slips/Will Not
EngageVehicle will not
run in “R” position
(but runs in “D”,
“3”, “2” and “1”
positions). Clutch
slips.
Very poor accel-
eration.ON vehicle1. A/T positionAT- 2 1 5
2. Stall testAT- 4 3
3. Line pressure testAT- 4 6
4. Line pressure solenoid valveAT- 1 2 6
5. Control valve assemblyAT- 2 2 5
OFF vehicle6. Reverse clutchAT- 2 9 6
7. High clutchAT- 3 0 1
8. Forward clutchAT- 3 0 7
9. Overrun clutchAT- 3 0 7
10. Low & reverse brakeAT- 3 1 5
Vehicle will not
run in “D”, “3” and
“2” positions (but
runs in “1” and
“R” positions).ON vehicle 1. A/T positionAT- 2 1 5
OFF vehicle 2. Low one-way clutchAT- 2 5 5
Vehicle will not
run in “D”, “3”, “2”
and “1” positions
(but runs in “R”
position). Clutch
slips.
Very poor accel-
eration.ON vehicle1. A/T fluid levelAT- 1 4
2. Stall testAT- 4 3
3. Line pressure testAT- 4 6
4. Line pressure solenoid valveAT- 1 2 6
5. Control valve assemblyAT- 2 2 5
6. N-D accumulatorAT- 2 2 5
OFF vehicle7. Reverse clutchAT- 2 9 6
8. High clutchAT- 3 0 1
9. Forward clutchAT- 3 0 7
10. Forward one-way clutchAT- 3 1 9
11. Low one-way clutchAT- 2 5 5
Clutches or
brakes slip some-
what in starting.ON vehicle1. A/T fluid levelAT- 1 4
2. A/T positionAT- 2 1 5
3. Accelerator pedal position sensor
EC-272*1, EC-652*2
4. Line pressure testAT- 4 6
5. Line pressure solenoid valveAT- 1 2 6
6. Control valve assemblyAT- 2 2 5
7. N-D accumulatorAT- 2 2 5
OFF vehicle8. Forward clutchAT- 3 0 7
9. Reverse clutchAT- 2 9 6
10. Low & reverse brakeAT- 3 1 5
11. Oil pumpAT- 2 7 5
12. Torque converterAT- 2 5 5
Items Symptom Condition Diagnostic item Reference page

TROUBLE DIAGNOSIS
AT-61
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Slips/Will Not
EngageRaces extremely
fast or slips in
changing from D
3
to D
2 when
depressing pedal. ON vehicle1. A/T fluid levelAT- 1 4
2. Accelerator pedal position sensor
EC-272*1, EC-652*2
3. Line pressure testAT- 4 6
4. Line pressure solenoid valveAT- 1 2 6
5. Shift solenoid valve BAT- 9 5
6. Control valve assemblyAT- 2 2 5
OFF vehicle7. Brake bandAT- 3 2 98. High clutchAT- 3 0 1
Races extremely
fast or slips in
changing from D
4
or D
3 to D 1
when depressing
pedal.ON vehicle1. A/T fluid levelAT- 1 4
2. Accelerator pedal position sensor
EC-272*1, EC-652*2
3. Line pressure testAT- 4 6
4. Line pressure solenoid valveAT- 1 2 6
5. Shift solenoid valve AAT- 9 0
6. Shift solenoid valve BAT- 9 5
7. Control valve assemblyAT- 2 2 5
OFF vehicle8. Forward clutchAT- 3 0 79. Forward one-way clutchAT- 3 1 9
10. Low one-way clutchAT- 2 5 5
Vehicle will not
run in any posi-
tion.ON vehicle1. A/T fluid levelAT- 1 4
2. A/T positionAT- 2 1 5
3. Line pressure testAT- 4 6
4. Line pressure solenoid valveAT- 1 2 6
OFF vehicle5. Oil pumpAT- 2 7 5
6. High clutchAT- 3 0 1
7. Brake bandAT- 3 2 9
8. Low & reverse brakeAT- 3 1 5
9. Torque converterAT- 2 5 5
10. Parking componentsAT- 2 4 6
OthersEngine cannot be
started in “P” and
“N” positions.
AT-175
ON vehicle1. Ignition switch and starterPG-3
, SC-14 .
2. A/T positionAT- 2 1 5
3. PNP switchAT- 1 6 1
Engine starts in
positions other
than “P” and “N”.ON vehicle1. A/T positionAT- 2 1 5
2. PNP switchAT- 1 6 1
Transaxle noise
in “P” and “N”
positions.ON vehicle1. A/T fluid levelAT- 1 4
2. Line pressure testAT- 4 6
3. Accelerator pedal position sensor
EC-272*1, EC-652*2
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT- 8 0, AT- 8 6
OFF vehicle5. Oil pumpAT- 2 7 56. Torque converterAT- 2 5 5
Items Symptom Condition Diagnostic item Reference page

TROUBLE DIAGNOSIS
AT-63
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OthersMaximum speed
not attained.
Acceleration
poor.ON vehicle1. A/T fluid levelAT- 1 4
2. PNP switchAT- 1 6 1
3. 3rd position switchAT- 1 6 1
4. Accelerator pedal position sensor
EC-272*1, EC-652*2
5. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT- 8 0, AT- 8 6
6. Shift solenoid valve AAT- 9 0
7. Shift solenoid valve BAT- 9 5
8. Control valve assemblyAT- 2 2 5
OFF vehicle9. Reverse clutchAT- 2 9 6
10. High clutchAT- 3 0 1
11. Brake bandAT- 3 2 9
12. Low & reverse brakeAT- 3 1 5
13. Oil pumpAT- 2 7 5
14. Torque converterAT- 2 5 5
Transaxle noise
in “D”, “3”, “2”, “1”
and “R” positions.ON vehicle 1. A/T fluid levelAT- 1 4
OFF vehicle 2. Torque converterAT- 2 5 5
Engine brake
does not operate
in “1” position.ON vehicle1. PNP switchAT- 1 6 1
2. A/T positionAT- 2 1 5
3. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT- 8 0, AT- 8 6
4. Control valve assemblyAT- 2 2 5
5. Overrun clutch solenoid valveAT- 1 0 0
OFF vehicle6. Overrun clutchAT- 3 0 77. Low & reverse brakeAT- 3 1 5
Transaxle over-
heats.ON vehicle1. A/T fluid levelAT- 1 4
2. Engine idle speed
EC-45*1, EC-387*2
3. Accelerator pedal position sensor
EC-272*1, EC-652*2
4. Line pressure testAT- 4 6
5. Line pressure solenoid valveAT- 1 2 6
6. Control valve assemblyAT- 2 2 5
OFF vehicle7. Oil pumpAT- 2 7 5
8. Reverse clutchAT- 2 9 6
9. High clutchAT- 3 0 1
10. Brake bandAT- 3 2 9
11. Forward clutchAT- 3 0 7
12. Overrun clutchAT- 3 0 7
13. Low & reverse brakeAT- 3 1 5
14. Torque converterAT- 2 5 5
Items Symptom Condition Diagnostic item Reference page

AT-64
TROUBLE DIAGNOSIS

*1: QR engine
*2: VQ engine
TCM Terminals and Reference ValueBCS0010C
TCM CONNECTOR TERMINAL LAYOUT
TCM INSPECTION TABLE
Data are reference value and are measured between each terminal and ground.
OthersATF shoots out
during operation.
White smoke
emitted from
exhaust pipe dur-
ing operation.ON vehicle 1. A/T fluid levelAT- 1 4
OFF vehicle2. Reverse clutchAT-296
3. High clutchAT-301
4. Brake bandAT-329
5. Forward clutchAT-307
6. Overrun clutchAT-307
7. Low & reverse brakeAT-315
Offensive smell at
fluid charging
pipe.ON vehicle 1. A/T fluid levelAT- 1 4
OFF vehicle2. Torque converterAT-255
3. Oil pumpAT-275
4. Reverse clutchAT-296
5. High clutchAT-301
6. Brake bandAT-329
7. Forward clutchAT-307
8. Overrun clutchAT-307
9. Low & reverse brakeAT-315
Items Symptom Condition Diagnostic item Reference page
SCIA0495E
Terminal Wire color Item ConditionJudgement stan-
dard (Approx.)
1 G/RLine pressure sole-
noid valveWhen releasing accelerator pedal
after warming up engine.1.5 - 3.0 V
When depressing accelerator pedal
fully after warming up engine.0V
2W/BLine pressure sole-
noid valve (with drop-
ping resistor)When releasing accelerator pedal
after warming up engine.4 - 14 V
When depressing accelerator pedal
fully after warming up engine.0V
3 G/BTorque converter
clutch solenoid valveWhen A/T performs lock-up. 8 - 15 V
When A/T does not perform lock-up. 0 V
5 L CAN-H — —
6P CAN-L — —

AT-126
LINE PRESSURE SOLENOID VALVE

LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionBCS0012I
Line pressure solenoid valve regulates oil pump discharge pressure to suit the driving condition in response to
a signal sent from TCM.
The line pressure duty cycle value is not consistent when the closed throttle position switch is ON. To
confirm the line pressure duty cycle at low-pressure, accelerator (throttle) should be open until the
closed throttle position switch is “OFF”.
CONSULT-II Reference ValveBCS0026L
On Board Diagnosis LogicBCS0012J
Diagnostic trouble code “LINE PRESSURE S/V” with CONSULT-II or 11th judgement flicker without CON-
SULT-II is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Possible CauseBCS0012K

Harness or connector
(Solenoid circuit is open or shorted.)

Line pressure solenoid valve
DTC Confirmation ProcedureBCS0012L
CAUTION:
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 that the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Depress accelerator pedal completely and wait at least 1 sec-
ond.
4. If DTC is detected, go to AT- 1 2 9 , "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine.
2. With brake pedal depressed, shift the lever from “P” → “N” → “D” → “N” → “P” positions.
3. Perform self-diagnosis. Refer to AT- 7 6 , "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT- 1 2 9 , "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
LINE PRES DTYSmall throttle opening (Low line pressure) ⇔ Large throttle opening
(High line pressure)0% ⇔ 92%
BCIA0031E

AT-146
A/T 4TH GEAR FUNCTION

A/T 4TH GEAR FUNCTIONPFP:31940
DescriptionBCS0013G

This malfunction will not be detected while A/T CHECK indicator lamp is indicating another self-diagnosis
malfunction.

This malfunction is detected when A/T does not shift into fourth gear position or the torque converter
clutch does not lock up as instructed by 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-II Reference Value BCS0026N
On Board Diagnosis LogicBCS0013H

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
malfunction.
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 A stuck open: 2, 2, 3 and 3* position
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 4TH GR FNCTN” is detected.

Diagnostic trouble code “A/T 4TH GR FNCTN” with CONSULT-II is detected when A/T cannot be shifted
to the 4th gear position even if electrical circuit is good.
Possible CauseBCS0013I

Shift solenoid valve A

Shift solenoid valve B

Line pressure solenoid valve

Each clutch

Hydraulic control circuit
Gear position 1 2 3 4
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open)
Item name Condition Display value (Approx.)
LINE PRES DTYSmall throttle opening (Low line pressure) ⇔ Large throttle opening
(High line pressure)0% ⇔ 92%