2003 NISSAN TEANA engine

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

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-173
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A/T CHECK Indicator Lamp Does Not Come OnBCS00149
SYMPTOM:
A/T CHECK indicator lamp does not come on for about 2 seconds when turning ignition switch ON.
DIAGNOSTIC PROCEDURE
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT- 6 9 , "
SELF-DIAGNOSTIC RESULT MODE" .
Is a malfunction in CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 1 3 3 , "CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK TCM POWER SOURCE
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector terminals and ground.
Refer to AT- 1 5 8 , "
Wiring Diagram — AT — MAIN" .
3. Turn ignition switch OFF.
4. Check voltage between TCM connector terminals and ground.
Refer to AT- 1 5 8 , "
Wiring Diagram — AT — MAIN" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between ignition switch and TCM connector terminals 10, 19
Refer to AT- 1 5 8 , "
Wiring Diagram — AT — MAIN" .

Harness for short or open between battery and TCM connector terminal 28
Refer to AT- 1 5 8 , "
Wiring Diagram — AT — MAIN" .

15A fuse (No.17, located in the fuse block) and 10A fuse (No.83, located in the IPDM E/R)

Ignition switch. Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
Item Connector Terminal Judgement standard (Approx.)
TCM connectorF10410
Battery voltage 19
F105 28
SCIA2656E
ItemConnec-
torTerminal Judgement standard (Approx.)
TCM connectorF10410 0 V
19 0 V
F105 28 Battery voltage
SCIA2657E

AT-174
TROUBLE DIAGNOSIS FOR SYMPTOMS

4. CHECK TCM GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between TCM connector terminals and ground.
Refer to AT- 1 5 8 , "
Wiring Diagram — AT — MAIN" .
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
5. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness and fuse for short or open between ignition switch and A/T CHECK indicator lamp
Refer to PG-3, "
POWER SUPPLY ROUTING CIRCUIT" .

Harness for short or open between A/T CHECK indicator lamp and TCM
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6. SYMPTOM CHECK
Check again. Refer to AT- 4 8 , "
Check Before Engine Is Started" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 7.
7. CHECK TCM
1. Check TCM input/output. Refer to AT- 6 4 , "
TCM Terminals and Reference Value" .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Item Connector Terminal Continuity
TCM connector F10525
Ye s
48
SCIA2671E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-175
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Engine Cannot Be Started in “P” and “N” PositionBCS0014A
SYMPTOM:

Engine cannot be started with selector lever in “P” or “N” position.

Engine can be started with selector lever in “D”, “3”, “2”, “1” or “R” position.
DIAGNOSTIC PROCEDURE
1. CHECK PARK/NEUTRAL POSITION (PNP) SWITCH
Check for short or open of park/neutral position (PNP) switch har-
ness connector terminals. Refer to AT- 1 6 8 , "
Wiring Diagram — AT
— NONDTC" .
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. CHECK CONTROL CABLE ADJUSTMENT
Check PNP switch again with control cable disconnected from manual shaft of A/T assembly. Refer to test
group 1.
OK or NG
OK >> Adjust control cable. Refer to AT- 2 1 5 , "Adjustment of A/T Position" .
NG >> 1. Check PNP switch (Refer to test group 1.) again after adjusting PNP switch (Refer to AT- 2 3 1
Refer to AT- 2 3 0 ).
–If OK, INSPECTION END
–If NG, repair or replace PNP switch. Refer to AT- 2 3 0 , "Park/Neutral Position (PNP) Switch" .
3. CHECK STARTING SYSTEM
Check starting system. Refer to SC-14, "
STARTING SYSTEM" .
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Lever position Connector Terminal Continuity
“P”, “N”
F24 1 - 2Ye s
Other position No
SCIA5606E

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-177
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4. DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT- 2 5 5 , "
Disassembly" .
2. Check the following items:
–Forward clutch assembly. Refer to AT- 3 0 7 , "Forward and Overrun Clutches" .
–Overrun clutch assembly. Refer to AT- 3 0 7 , "Forward and Overrun Clutches" .
–Reverse clutch assembly. Refer to AT- 2 9 6 , "Reverse Clutch" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. SYMPTOM CHECK
Check again. Refer to AT- 4 8 , "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6. CHECK TCM
1. Check TCM input/output signals. Refer to AT- 6 4 , "
TCM Terminals and Reference Value" .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Large Shock. “N” → “R” PositionBCS0014D
SYMPTOM:
Large shock when shifting from “N” to “R” position.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS (ECM)
Perform self-diagnosis. Refer to EC-82, "
SELF-DIAG RESULTS MODE" (QR engine) or EC-427, "SELF-
DIAG RESULTS MODE" (VQ engine).
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to EC-82, "SELF-DIAG RESULTS MODE" (QR engine)
or EC-427, "
SELF-DIAG RESULTS MODE" (VQ engine).
NO >> GO TO 2.
2. CHECK SELF-DIAGNOSTIC RESULTS (TCM)
Perform self-diagnosis. Refer to AT- 6 9 , "
SELF-DIAGNOSTIC RESULT MODE" or AT- 7 6 , "Diagnostic Proce-
dure Without CONSULT-II" .
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning systems. Refer to AT- 6 9 , "SELF-DIAGNOSTIC RESULT MODE" or AT-
77, "Judgement of Self-Diagnosis Code" .
NO >> GO TO 3.

AT-182
TROUBLE DIAGNOSIS FOR SYMPTOMS

6. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 5 5 , "
Disassembly" .
2. Check A/T fluid condition. Refer to AT- 4 3 , "
A/T Fluid Condition Check" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
7. SYMPTOM CHECK
Check again. Refer to AT- 4 8 , "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8. CHECK TCM
1. Check TCM input/output signals. Refer to AT- 6 4 , "
TCM Terminals and Reference Value" .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Vehicle Cannot Be Started From D1BCS0014G
SYMPTOM:
Vehicle cannot be started from D1 on “Cruise Test — Part 1” and “Cruise Test — Part 2”.
DIAGNOSTIC PROCEDURE
1. SYMPTOM CHECK
Check symptom. Refer to AT- 4 8 , "
Check at Idle" .
Does vehicle creep backward in
“R” position?
YES >> GO TO 2.
NO >> Go to AT- 1 7 9 , "
Vehicle Does Not Creep Backward in “R” Position" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 6 9 , "
SELF-DIAGNOSTIC RESULT MODE" or AT- 7 6 , "Diagnostic Proce-
dure Without CONSULT-II" .
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning systems. Refer to AT- 6 9 , "SELF-DIAGNOSTIC RESULT MODE" or AT-
77, "Judgement of Self-Diagnosis Code" .
NO >> GO TO 3.
3. CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. Refer to EC-272, "
DTC P2138 APP SENSOR" (QR engine) or EC-
652, "DTC P2138 APP SENSOR" (VQ engine).
OK or NG
OK >> GO TO 4.
NG >> Repair or replace accelerator pedal position sensor.

AT-184
TROUBLE DIAGNOSIS FOR SYMPTOMS

8. SYMPTOM CHECK
Check again. Refer to AT- 5 0 , "
Cruise Test — Part 1" or AT- 5 1 , "Cruise Test — Part 2" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 9.
9. CHECK TCM
1. Check TCM input/output signals. Refer to AT- 6 4 , "
TCM Terminals and Reference Value" .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D1 → D2 or Does Not Kickdown: D4 → D2BCS0014H
SYMPTOM:

A/T does not shift from D1 to D2 at the specified speed on “Cruise Test — Part 1”.

A/T does not shift from D4 to D2 when depressing accelerator pedal fully at the specified speed
on “Cruise Test — Part 2”.
DIAGNOSTIC PROCEDURE
1. SYMPTOM CHECK
Check symptom. Refer to AT- 4 8 , "
Check at Idle" and AT- 5 0 , "Cruise Test — Part 1" .
Does vehicle creep forward in
“D”, “3”, “2” or “1” position, and start from D1 ?
YES >> GO TO 2.
NO >> Go to AT- 1 8 1 , "
Vehicle Does Not Creep Forward in “D”, “3”, “2” or “1” Position" and AT- 1 8 2 , "Ve h i -
cle Cannot Be Started From D1" .
2. CHECK A/T POSITION
Check A/T position. Refer to AT- 2 1 5 , "
Checking of A/T Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust A/T position. Refer to AT- 2 1 5 , "
Adjustment of A/T Position" .
3. CHECK VEHICLE SPEED SENSOR·A/T AND VEHICLE SPEED SENSOR·MTR CIRCUIT
Check vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR circuit. Refer to AT- 8 0 ,
"VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)" and AT- 8 6 , "VEHICLE SPEED SENSOR MTR"
.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace vehicle speed sensor·A/T (revolution sensor) and/or vehicle speed sensor·MTR
circuits.
4. CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. Refer to EC-272, "
DTC P2138 APP SENSOR" (QR engine) or EC-
652, "DTC P2138 APP SENSOR" (VQ engine).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace accelerator pedal position (APP) sensor.

AT-186
TROUBLE DIAGNOSIS FOR SYMPTOMS

A/T Does Not Shift: D2 → D3BCS0014I
SYMPTOM:
A/T does not shift from D2 to D3 at the specified speed on “Cruise Test — Part 1” and “Cruise Test —
Part 2”.
DIAGNOSTIC PROCEDURE
1. SYMPTOM CHECK
Check symptom. Refer to AT- 4 8 , "
Check at Idle" and AT- 5 0 , "Cruise Test — Part 1" .
Does vehicle creep forward in
“D”, “3”, “2” or “1” position, and start from D1 ?
YES >> GO TO 2.
NO >> Go to AT- 1 8 1 , "
Vehicle Does Not Creep Forward in “D”, “3”, “2” or “1” Position" and AT- 1 8 2 , "Ve h i -
cle Cannot Be Started From D1" .
2. CHECK A/T POSITION
Check A/T position. Refer to AT- 2 1 5 , "
Checking of A/T Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust A/T position. Refer to AT- 2 1 5 , "
Adjustment of A/T Position" .
3. CHECK VEHICLE SPEED SENSOR·A/T AND VEHICLE SPEED SENSOR·MTR CIRCUIT
Check vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR circuit. Refer to AT- 8 0 ,
"VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)" and AT- 8 6 , "VEHICLE SPEED SENSOR MTR"
.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace vehicle speed sensor·A/T (revolution sensor) and/or vehicle speed sensor·MTR
circuits.
4. CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. Refer to EC-272, "
DTC P2138 APP SENSOR" (QR engine) or EC-
652, "DTC P2138 APP SENSOR" (VQ engine).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace accelerator pedal position sensor.
5. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 6 , "
Components" .
2. Check A/T fluid condition. Refer to AT- 4 3 , "
A/T Fluid Condition Check" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.