2003 NISSAN TEANA lock

A/T TCC S/V FUNCTION (LOCK-UP)
AT-151
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A/T TCC S/V FUNCTION (LOCK-UP)PFP:31940
DescriptionBCS0013L

This malfunction is detected when A/T does not shift into fourth gear position or 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 ValueBCS0026O
On Board Diagnosis LogicBCS0013M

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 B stuck closed: 1, 2, 2 and 1 positions to each gear posi-
tion above

Diagnostic trouble code “A/T TCC S/V FNCTN” with CONSULT-II is detected when A/T cannot perform
lock-up even if electrical circuit is good.
Possible CauseBCS0013N

Line pressure solenoid valve

Torque converter clutch solenoid valve

Each clutch

Hydraulic control circuit
Item name Condition Display value (Approx.)
TCC S/V DUTY Lock-up OFF ⇔ Lock-up ON 4% ⇔ 94%
LINE PRES DTYSmall throttle opening (Low line pressure) ⇔ Large throttle opening
(High line pressure)0% ⇔ 92%

AT-152
A/T TCC S/V FUNCTION (LOCK-UP)

DTC Confirmation ProcedureBCS0013O
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 that the malfunction is eliminated.
WITH CONSULT-II
1. Start engine and select “DATA MONITOR” mode for “A/T” with
CONSULT-II.
2. Make sure that output voltage of A/T fluid temperature sensor is
within the range below.
FLUID TEMP SE: 0.4 - 1.5 V
If out of range, drive vehicle to decrease voltage (warm up the
fluid) or stop engine to increase voltage (cool down the fluid).
3. Select “TCC S/V FNCTN P0744” of “DTC WORK SUPPORT”
mode for “A/T” with CONSULT-II and touch “START”.
4. Accelerate vehicle to more than 80 km/h (50 MPH) and maintain
the following condition continuously until “TESTING” has turned
to “COMPLETE”. (It will take approximately 30 seconds after
“TESTING” shows.)
THROTTLE POSI: 1.0/8 - 2.0/8 (at all times during step 4)
SLCT LVR POSI: “D” position
TCC S/V DUTY: More than 94%
VEHICLE SPEED: Constant speed of more than 80 km/h (50 MPH)
–Make sure that “GEAR” shows “4”.
–For shift schedule, refer to AT- 5 4 , "Vehicle Speed Which Gear Shifting Occurs" .
–If “TESTING” does not appear on CONSULT-II for a long time, select “SELF-DIAG RESULTS” for
“A/T”. In case a 1st trip DTC other than “A/T TCC S/V FNCTN” is shown, refer to applicable “TROU-
BLE DIAGNOSIS FOR DTC”.
5. Make sure that “OK” is displayed. (If “NG” is displayed, refer to AT- 1 5 2 , "
Diagnostic Procedure" .)
Refer to AT- 5 4 , "
Vehicle Speed at When Lock-up Occurs/Releases" .
Diagnostic ProcedureBCS0013P
1. CHECK SHIFT-UP (D3 TO D4 )
During AT- 5 0 , "
Cruise Test — Part 1" .
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 AT- 4 6 , "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 6.
BCIA0031E

A/T TCC S/V FUNCTION (LOCK-UP)
AT-153
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3. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check to ensure that:
–Valve, sleeve and plug slide along valve bore under their own weight.
–Valve, sleeve and plug are free from burrs, dents and scratches.
–Control valve springs are free from damage, deformation and fatigue.
–Hydraulic line is free from obstacles.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace control valve.
4. CHECK SHIFT-UP (D3 TO D4 )
During AT- 5 0 , "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 5.
NO >> Check control valve again. Repair or replace control valve assembly.
5. CHECK DTC
Perform AT- 1 5 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11. Check for proper lock-up.
6. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT- 1 2 7 , "
Wiring Diagram
— AT — LPSV" .
OK or NG
OK >> GO TO 7.
NG >> Replace solenoid valve assembly.
7. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Line pressure solenoid valve
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
127, "Wiring Diagram — AT — LPSV" .
OK or NG
OK >> GO TO 8.
NG >> Replace solenoid valve assembly.
Solenoid valve Connector TerminalResistance
(Approx.)
Line pressure solenoid valve F43 4 - Ground 2.5 - 5Ω
SCIA4951E
SCIA3275E

AT-154
A/T TCC S/V FUNCTION (LOCK-UP)

8. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check line pressure circuit valves for sticking.
–Pressure regulator valve
–Pilot valve
–Pressure modifier valve
OK or NG
OK >> GO TO 9.
NG >> Repair or replace control valve.
9. CHECK SHIFT-UP (D3 TO D4 )
During AT- 5 0 , "
Cruise Test — Part 1" .
Does A/T shift from D
3 to D4 at the specified speed?
YES >> GO TO 10.
NO >> Check control valve again. Repair or replace control valve assembly.
10. CHECK DTC
Perform AT- 1 5 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11.
11 . CHECK LOCK-UP
During AT- 5 0 , "
Cruise Test — Part 1" .
A/T perform lock-up at the specified speed?
YES >> Perform AT- 5 0 , "Cruise Test — Part 1" again and return to the start point of this test group.
NO >> GO TO 12.
12. CHECK VALVE RESISTANCE
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Torque converter clutch solenoid valve
2. Check resistance between terminal cord assembly harness con-
nector terminal and ground. Refer to AT- 1 0 6 , "
Wiring Diagram
— AT — TCV" .
OK or NG
OK >> GO TO 13.
NG >> Replace solenoid valve assembly.
Solenoid valve Connector TerminalResistance
(Approx.)
Torque converter clutch solenoid valve F43 5 - Ground 5 - 20Ω
SCIA2063E

A/T TCC S/V FUNCTION (LOCK-UP)
AT-155
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13. CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT- 2 2 5 , "
Control Valve Assembly and Accumulators" .
–Torque converter clutch solenoid valve
2. Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground. Refer to AT-
106, "Wiring Diagram — AT — TCV" .
OK or NG
OK >> GO TO 14.
NG >> Replace solenoid valve assembly.
14. CHECK CONTROL VALVE
1. Disassemble control valve assembly. Refer to AT- 2 8 0 , "
Control Valve Assembly" .
2. Check control valves for sticking.
–Torque converter clutch control valve
–Torque converter clutch relief valve
OK or NG
OK >> GO TO 15.
NG >> Repair or replace control valve.
15. CHECK LOCK-UP
During AT- 5 0 , "
Cruise Test — Part 1" .
A/T perform lock-up at the specified speed?
YES >> GO TO 16.
NO >> Check control valve again. Repair or replace control valve assembly.
16. CHECK DTC
Perform AT- 1 5 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> Perform AT- 5 0 , "
Cruise Test — Part 1" again and return to the start point of this test group.
SCIA2066E

MAIN POWER SUPPLY AND GROUND CIRCUIT
AT-159
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Data are reference value and are measured between each terminal and ground.
Diagnostic ProcedureBCS0026M
1. CHECK TCM POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground.
3. Turn ignition switch OFF.
4. Check voltage between TCM connector terminals and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between ignition switch and TCM connector terminals 10, 19

Harness for short or open between battery and TCM connector terminal 28

10A fuse (No.17, located in the fuse block) and 10A fuse (No83, located in the IPDM E/R)

Ignition switch. Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
Te r m i -
nalWire color Item ConditionJudgement stan-
dard
(Approx.)
10 Y Power source
or When turning ignition switch ON. Battery voltage
When turning ignition switch OFF. 0 V
19 Y Power sourceWhen turning ignition switch ON. Battery voltage
When turning ignition switch OFF. 0 V
25 B Ground Always 0 V
28 Y/RPower source
(Memory back-up)Always Battery voltage
48 B Ground Always 0 V
ItemConnec-
torTerminal Judgement standard (Approx.)
TCM connectorF10410
Battery voltage 19
F105 28
SCIA2656E
ItemConnec-
torTerminal Judgement standard (Approx.)
TCM connectorF10410 0V
19 0V
F105 28 Battery voltage
SCIA2657E

PNP, 3RD POSITION SWITCH AND CLOSED THROTTLE, WIDE OPEN THROT-
TLE POSITION SIGNAL
AT-163
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3. CHECK PNP SWITCH CIRCUIT (WITHOUT CONSULT-II)
Without CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector F105 terminals and
ground while moving selector lever through each position. Refer
to AT- 1 6 8 , "
Wiring Diagram — AT — NONDTC" .
B: Battery voltage
0: 0V
OK or NG
OK >> GO TO 7.
NG >> GO TO 4.
4. CHECK PNP SWITCH
Check PNP switch. Refer to AT- 1 6 6 , "
PNP SWITCH" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between ignition switch and PNP switch.

Harness for short or open between PNP switch and TCM.

Harness for short or open between unified meter and A/C amp and PNP switch.

Harness for short or open between unified meter and A/C amp and TCM.

10A fuse (No.14, located in the fuse block)

Unified meter and A/C amp. Refer to DI-27, "UNIFIED METER AND A/C AMP" .

Ignition switch. Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
Lever positionTerminal
36 35 34 27 26
“P”, “N” B 0 0 0 0
“R” 0 B 0 0 0
“D”·“3” 0 0 B 0 0
“2” 0 0 0 B 0
“1” 0 0 0 0 B
SCIA4343E

BRAKE SIGNAL CIRCUIT
AT-167
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BRAKE SIGNAL CIRCUITPFP:25320
CONSULT-II Reference ValueBCS0026P
Diagnostic ProcedureBCS0026Q
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT- 6 9 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 7 6 , "Diagnostic Proce-
dure Without CONSULT-II" .
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer toAT- 1 3 3 , "CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK STOP LAMP SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3. Read out ON/OFF switching action of the “BRAKE SW”.
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
3. CHECK STOP LAMP SWITCH
Check continuity between stop lamp switch harness connector termi-
nals. Refer to AT- 1 6 8 , "
Wiring Diagram — AT — NONDTC" .
Check stop lamp switch after adjusting brake pedal — refer to
BR-6, "
BRAKE PEDAL" .
OK or NG
OK >> Check the following. If NG, repair or replace damaged
parts.

Harness for short or open between battery and stop lamp switch.

Harness for short or open between stop lamp switch and unified meter and A/C amp.

10A fuse (No.20, located in fuse block).
NG >> Repair or replace the stop lamp switch.
Item name Condition Display value
BRAKE SWDepressed brake pedal. ON
Released brake pedal. OFF
Item name Condition Display value
BRAKE SWDepressed brake pedal. ON
Released brake pedal. OFF
SCIA7913E
Condition Continuity
When brake pedal is depressed Yes
When brake pedal is released No
SCIA2126E