2014 NISSAN TEANA ignition

P1572 ASCD BRAKE SWITCHEC-449
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
Is the inspection result normal?
YES >> GO TO 11.
NO >> Perform the trouble diagnosis for power supply circuit.
11 .CHECK STOP LAMP SWITCH SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check the continuity between stop lamp relay harness connector and ECM harness connector.
*1: Except for California
*2: For California
3. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair or replace error-detected parts
12.CHECK STOP LAMP RELAY
Check the stop lamp relay. Refer to EC-450, "Component Inspection (Stop Lamp Relay)"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace stop lamp relay.
Component Inspection (Brake Pedal Position Switch)INFOID:0000000009462380
1.CHECK BRAKE PEDAL POSITION SWITCH-1
1. Turn ignition switch OFF.
2. Disconnect brake pedal position harness connector.
3. Check the continuity between brake pedal position switch terminals as per the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK BRAKE PEDAL POSITION SWITCH-2
1. Adjust brake pedal position switch installation. Refer to BR-13, "Inspection and Adjustment"
.
2. Check the continuity between brake pedal position switch terminals as per the following conditions.
+
−Voltag e
Stop lamp relay
Connector Terminal E57 5 Ground Battery voltage
+ −
Continuity
St op la mp rel ay EC M
Connector Terminal Connector Terminal
E57 3 E10
*1
E31*211 5 E x i s t e d
Brake pedal position switch
Condition Continuity
+ −
Te r m i n a l s
1 2 Brake pedal Fully released Existed
Slightly de-
pressed Not existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-450
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P1572 ASCD BRAKE SWITCH
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace brake pedal position switch. Refer to BR-18, "Exploded View"
.
Component Inspection (Stop Lamp Switch)INFOID:0000000009462381
1.CHECK STOP LAMP SWITCH-1
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the continuity between stop lamp swit ch terminals as per the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH-2
1. Adjust stop lamp switch installation. Refer to BR-13, "Inspection and Adjustment"
.
2. Check the continuity between stop lamp swit ch terminals as per the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace stop lamp switch. Refer to BR-18, "Exploded View"
.
Component Inspection (Stop Lamp Relay)INFOID:0000000009462382
1.CHECK STOP LAMP RELAY
1. Turn ignition switch OFF.
2. Remove stop lamp relay.
Brake pedal position switch
Condition Continuity
+ −
Te r m i n a l s
1 2 Brake pedal Fully released Existed
Slightly de-
pressed Not existed
Sto p l am p s w it ch
Condition Continuity
+ −
Te r m i n a l s
1 2 Brake pedal Fully released Not existed
Slightly de-
pressed Existed
Sto p l am p s w it ch
Condition Continuity
+ −
Te r m i n a l s
1 2 Brake pedal Fully released Not existed
Slightly de-
pressed Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-452
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P1574 ASCD VEHICL
E SPEED SENSOR
P1574 ASCD VEHICLE SPEED SENSOR
DescriptionINFOID:0000000009462383
The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combina-
tion meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD
control. Refer to EC-63, "AUTOMATIC SPEED CONTROL DE VICE (ASCD) : System Description"
for ASCD
functions.
DTC LogicINFOID:0000000009462384
DTC DETECTION LOGIC
NOTE:
• If DTC P1574 is displayed with DTC U1001, first pe rform the trouble diagnosis for DTC U1001. Refer
to EC-208, "DTC Logic"
.
• If DTC P1574 is displayed with DTC P0500, first pe rform the trouble diagnosis for DTC P0500. Refer
to EC-380, "DTC Logic"
•If DTC P1574 is displayed with DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B, first per-
form the trouble diagnosis fo r DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B. Refer to
EC-404, "DTC Logic"
.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine.
2. Drive the vehicle at more than 40 km/h (25 MPH). CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheel s lifted in the shop or by driving the vehicle.
If a road test is expected to be easier , it is unnecessary to lift the vehicle.
3. Check DTC.
Is DTC detected?
YES >> Proceed to EC-452, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462385
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to TM-43, "CONSULT Function"
.
Is DTC detected?
NO >> GO TO 2.
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P1574 ASCD VHL SPD SEN
(ASCD VHL SPD SEN) ECM detects a difference between two
vehicle speed signals is out of the speci-
fied range. • Harness or connectors
(CAN communication line is open or shorted.)
• ABS actuator and electric unit (control unit)
•TCM
•ECM
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-454
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P1715 INPUT SPEED SENSOR
P1715 INPUT SPEED SENSOR
DescriptionINFOID:0000000009462386
ECM receives input speed sensor signal from TCM thr
ough CAN communication line. ECM uses this signal for
engine control.
DTC LogicINFOID:0000000009462387
DTC DETECTION LOGIC
NOTE:
• If DTC P1715 is displayed with DTC UXXXX, first perform the tr ouble diagnosis for DTC UXXXX.
• If DTC P1715 is displayed with DTC P0335, first pe rform the trouble diagnosis for DTC P0335. Refer
to EC-326, "DTC Logic"
.
• If DTC P1715 is displayed with DTC P0340, first pe rform the trouble diagnosis for DTC P0340. Refer
to EC-329, "DTC Logic"
.
• If DTC P1715 is displayed with DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B, first per-
form the trouble diagnosis fo r DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B. Refer to
EC-404, "DTC Logic"
.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and drive the vehicle at more t han 50 km/h (31 MPH) for at least 5 seconds.
CAUTION:
Always drive vehicle at a safe speed.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-454, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462388
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to TM-43, "CONSULT Function"
.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble shooting relevant to DTC indicated.
2.REPLACE TCM
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P1715 IN PULY SPEED
(IN PULY SPEED) Input speed sensor signal is different from
the theoretical value calculated by ECM
from output speed sensor signal and en-
gine rpm signal. • Harness or connectors
(The CAN communication line is open or
shorted)
• Harness or connectors
(Input speed sensor circuit is open or
shorted)
•TCM
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-456
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P1800 INTAKE MANIFOLD TUNING VALVE
P1800 INTAKE MANIFOLD TUNING VALVE
DTC LogicINFOID:0000000009462389
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confi rm battery voltage is more than 11 V at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and warm it up to the normal operating temperature. [more than 60 °C(140 °F)]
2. Let it idle for at least 10 sec onds. (engine speed: less than 1,000 rpm)
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-456, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462390
1.CHECK INTAKE MANIFOLD TUNI NG VALVE MOTOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector.
*1: Except for California
*2: For California
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK INTAKE MANIFOLD TUNING VALVE MOTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between ECM harnes s connector and IPDM E/R harness connector.
DTC No.CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P1800 VIAS S/V-1
(VIAS S/V-1) An excessively low or high voltage signal
is sent to ECM through the intake manifold
tuning valve. • Harness or connectors
(The solenoid valve 1 circuit is open or
shorted.)
• Intake manifold tuning valve
ECM
Vo l ta g e
+-
Connector Terminal Connector Terminal
F14
*1
F91*26 E10*1
E31*2128 Battery voltage
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P1800 INTAKE MANIFOLD TUNING VALVEEC-457
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
*1: Except for California
*2: For California
5. Also check harness for short to ground.
Is the inspection result normal?
YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
3.CHECK INTAKE MANIFOLD TUNING VA LVE MOTOR OUTPUT SIGNAL CIRCUIT
1. Disconnect intake manifold tuning valve motor harness connector.
2. Check the continuity between intake manifold tuning valve motor harness connector and ECM harness
connector.
*1: Except for California
*2: For California
3. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK INTAKE MANIFOLD TUNING VALVE MOTOR
Check the intake manifold tuning valve motor. Refer to EC-457, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace intake manifold assembly. Refer to EM-30, "Removal and Installation"
.
Component InspectionINFOID:0000000009462391
1.CHECK THROTTLE CONTROL MOTOR
1. Turn ignition switch OFF.
2. Disconnect electric throttle c ontrol actuator harness connector.
3. Check the resistance between electric throttle control actuator terminals as per the following.
Is the inspection result normal?
YES >> INSPECTION END
+ −
Continuity
ECM IPDM E/R
Connector Terminal Connector Terminal
F14
*1
F91*26F8359Existed
+ −
Continuity
Intake manifold tuning valve
motor ECM
Connector Terminal Connector Terminal
F40 1
F14
*1
F91*2
5 Not existed
7 Existed
2 5 Existed
7 Not existed
Electric throttle control actuator Resistance
(Approx.)
+
−
Te r m i n a l s
5 6 3 - 8 Ω [at 25 °C (77 °F)]
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P1805 BRAKE SWITCHEC-459
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
P1805 BRAKE SWITCH
DTC LogicINFOID:0000000009462392
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-459, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462393
1.CHECK STOP LAMP SWIT CH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform the trouble diagnosis for power supply circuit.
2.CHECK STOP LAMP SWITCH GROUND CIRCUIT
1. Disconnect stop lamp relay harness connector.
2. Check the continuity between stop lamp switch harness connector and stop lamp relay harness connec-
tor.
3. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace error-detected parts.
3.CHECK STOP LAMP SWITCH
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P1805 BRAKE SW/CIRCUIT
(BRAKE SW/CIRCUIT) A stop lamp switch signal is not sent to
ECM for extremely long time while the ve-
hicle is driving. • Harness or connectors
(Stop lamp switch circuit is open or short-
ed.)
• Stop lamp switch
•Stop lamp relay
+
−Voltag e
Stop lamp switch
Connector Terminal E38 1 Ground Battery voltage
+ −
Continuity
Stop lamp switch Stop lamp relay
Connector Terminal Connector Terminal E38 2 E57 2 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P1805 BRAKE SWITCHEC-461
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
Component Inspection (Stop Lamp Switch)INFOID:0000000009462394
1.CHECK STOP LAMP SWITCH-1
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the continuity between stop lamp switch terminals as per the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH-2
1. Adjust stop lamp switch installation. Refer to BR-13, "Inspection and Adjustment"
.
2. Check the continuity between stop lamp switch terminals as per the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace stop lamp switch. Refer to BR-18, "Exploded View"
.
Component Inspection (Stop Lamp Relay)INFOID:0000000009462395
1.CHECK STOP LAMP RELAY
1. Turn ignition switch OFF.
2. Remove stop lamp relay.
3. Check the continuity between stop lamp relay terminals as per the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace stop lamp relay.
Stop lamp switch
Condition Continuity
+ −
Te r m i n a l s
1 2 Brake pedal Fully released Not existed
Slightly de-
pressed Existed
Stop lamp switch
Condition Continuity
+ −
Te r m i n a l s
1 2 Brake pedal Fully released Not existed
Slightly de-
pressed Existed
Stop lamp relay
Condition Continuity
+-
Te r m i n a l
35 12 V direct current supply between terminals
1 and 2 Existed
No current supply Not existed
JMBIA0848ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM