2014 NISSAN TEANA wheel

P1572 ASCD BRAKE SWITCHEC-445
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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P1572 ASCD BRAKE SWITCH
DTC LogicINFOID:0000000009462378
DTC DETECTION LOGIC
NOTE:
• If DTC P1572 is displayed with DTC P0603, P0604, P0605, P0606, P 0607, P060A, and P060B, first per-
form the trouble diagnosis for DTC P0603, P0604, P0605, P0606, P0607, P060A, and P060B. Refer to
EC-402, "DTC Logic"
.
• This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when igniti on switch OFF. And even when ma lfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.
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.
NOTE:
Procedure for malfunction B is not described here. It take s extremely long time to complete procedure for mal-
function B. By performing procedure for malfunction A, the incident that causes malfunction B can be
detected.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
1. Start engine.
2. Press MAIN switch and make sure that CRUISE indicator is displayed in combination meter.
3. Drive the vehicle for at least 5 consecut ive seconds as per the following conditions.
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.
4. Check DTC.
Is DTC detected?
YES >> Proceed to EC-452, "Diagnosis Procedure".
NO >> GO TO 3.
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P1572 ASCD BRAKE SW
(ASCD BRAKE SW) A)
When the vehicle speed is above 30 km/
h (19 MPH), ON signals from the stop
lamp switch and the brake pedal position
switch are sent to the ECM at the same
time. • Harness or connectors
(Stop lamp switch circuit is shorted.)
(Brake pedal position switch circuit is
shorted.)
•Stop lamp switch
• Brake pedal position switch
•Stop lamp relay
• Incorrect stop lamp switch installation
• Incorrect brake pedal position switch in- stallation
•ECM
B)
Brake pedal position switch signal is not
sent to ECM for extremely long time while
the vehicle is driving.
Vehicle speed More than 30 km/h (19 mph)
Selector lever Suitable position
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-446
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P1572 ASCD BRAKE SWITCH
3.PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Drive the vehicle for at least 5 consecut ive seconds as per the following conditions.
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.
2. Check DTC.
Is DTC detected?
YES >> Proceed to EC-452, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462379
1.CHECK OVERALL FUNCTION-1
With CONSULT
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONI TOR” mode of “ENGINE” using CONSULT.
3. Check “BRAKE SW1” indication as per the following conditions.
Without CONSULT
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals as per the following.
*1: Except for California
*2: For California
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK OVERALL FUNCTION-2
With CONSULT
Select “BRAKE SW2” and check indication as per the following conditions.
Vehicle speed More than 30 km/h (19 mph)
Selector lever Suitable position
Driving location Depress the brake pedal for more
than five seconds so as not to come
off from the above-mentioned vehi-
cle speed.
Monitor item Condition Indication
BRAKE SW1 Brake pedal Slightly depressed OFF
Fully released ON
ECM ConditionVo l ta g e
(Approx.)
Connector +–
Te r m i n a l
E10
*1
E31*2116 128 Brake pedal Slightly depressed 0 V
Fully released Battery voltage
Monitor item Condition Indication
BRAKE SW2 Brake pedal Slightly depressed ON
Fully released OFF
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

SERVICE DATA AND SPECIFICATIONS (SDS)EC-541
< SERVICE DATA AND SPECIFICATIONS (SDS) [QR25DE]
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Idle SpeedINFOID:0000000009462469
*: Under the following conditions
• A/C switch: OFF
• Electric load: OFF (Lights, heater fan & rear window defogger)
• Steering wheel: Kept in straight-ahead position
Ignition TimingINFOID:0000000009462470
*: Under the following conditions
• A/C switch: OFF
• Electric load: OFF (Lights, heater fan & rear window defogger)
• Steering wheel: Kept in straight-ahead position
Calculated Load ValueINFOID:0000000009462471
Mass Air Flow SensorINFOID:0000000009462472
*: Engine is warmed up to normal operating temperature and running under no load. Condition Specification
No load* (in P or N position) 650 ± 50 rpm
Condition Specification
No load* (in P or N position) 10 ± 2 ° BTDC
Condition Specification (Using CONSULT or GST)
At idle 10 – 35 %
At 2,500 rpm 10 – 35 %
Supply voltageBattery voltage (11 – 14 V)
Output voltage at idle 1.3 – 1.6 V*
Mass air flow (Using CONSULT or GST) 1.0 – 4.0 g/s at idle*
4.0 – 10.0 g/s at 2,500 rpm*
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

OPERATIONEC-589
< SYSTEM DESCRIPTION > [VQ35DE]
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OPERATION
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
AUTOMATIC SPEED CONTROL DEVICE (
ASCD) : Switch Name and Function
INFOID:0000000009462530
SWITCHES AND INDICATORS
SET SPEED RANGE
ASCD system can be set the following vehicle speed.
SWITCH OPERATION
1. CRUISE indicator 2. SET indicator 3. CANCEL switch
4. ACCEL/RES switch (ACCELERATE/RESUME) 5. COAST/SET switch 6. ON/OFF (MAIN) switch
A. On the combination meter (Informa- tion display) B. On the steering wheel
JPBIA5872ZZ
Minimum speed (Approx.) Maximum speed (Approx.)
38 km/h (24 MPH) 144 km/h (89 MPH)
Item Function
CANCEL switch Cancels the cruise control driving.
ACCEL/RES switch
(RESUME/ACCELERATE) • Resumes the set speed.
• Increases speed incrementally during cruise control driving.
COAST/SET switch
(SET/COAST) • Sets desired cruise speed.
• Decreases speed incrementally during cruise control driving.
ON/OFF (MAIN) switch Master switch to activate the ASCD system.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ECM
EC-613
< ECU DIAGNOSIS INFORMATION > [VQ35DE]
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ECU DIAGNOSIS INFORMATION
ECM
Reference ValueINFOID:0000000009462542
VALUES ON THE DIAGNOSIS TOOL
NOTE:
• The following table includes information (items) inapplicable to this vehicle. For information (items) applica- ble to this vehicle, refer to CONSULT display items.
• Numerical values in the following table are reference values.
• These values are input/output values that ECM receiv es/transmits and may differ from actual operations.
Example: The ignition timing shown by the timing light may differ from the ignition timing displayed on the
data monitor.
This occurs because the timing light shows a value calculated by ECM according to signals received from
the camshaft position sensor and other sensors related to ignition timing.
• For outlines of following items, refer to EC-601, "CONSULT Function"
.
Monitor Item Condition Values/Status
ENG SPEED Run engine and compare CONSULT value with the tachometer indication.Almost the same speed as
the tachometer indication.
MAS A/F SE-B1 See EC-701, "Description"
.
B/FUEL SCHDL See EC-701, "Description"
.
A/F ALPHA-B1 See EC-701, "Description"
.
A/F ALPHA-B2 See EC-701, "Description"
.
COOLAN TEMP/S Engine: After warming up More than 70 °C (158 °F)
A/F SEN1 (B1) Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
A/F SEN1 (B2) Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
HO2S2 (B1) Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
• Engine: After warming up
• After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load 0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 (B2) Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
• Engine: After warming up
• After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load 0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR(B1) Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
• Engine: After warming up
• After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load LEAN
←→ RICH
HO2S2 MNTR(B2) Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
• Engine: After warming up
• After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load LEAN
←→ RICH
VHCL SPEED SE Turn drive wheels and compare CONSULT value with the speedometer indica-
tion. Almost the same speed as
speedometer indication
BATTERY VOLT Ignition switch: ON (Engine stopped) 11 - 14 V
ACCEL SEN 1 Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V
ACCEL SEN 2*
1Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-614
< ECU DIAGNOSIS INFORMATION >[VQ35DE]
ECM
TP SEN 1-B1• Ignition switch: ON
(Engine stopped)
• Selector lever: D position Accelerator pedal: Fully re
leased More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
TP SEN 2-B1*
1• Ignition switch: ON (Engine stopped)
• Selector lever: D position Accelerator pedal: Fully re
leased More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
FUEL T/TMP SE Ignition switch: ON Indicates fuel tank tempera-
ture
EVAP SYS PRES Ignition switch: ON Approx. 1.8 - 4.8 V
FUEL LEVEL SE Ignition switch: ON Depending on fuel level of
fuel tank
START SIGNAL Ignition switch: ON → START → ON Off → On → Off
CLSD THL POS Ignition switch: ON
(Engine stopped) Accelerator pedal:
Fully released On
Accelerator pedal: Slightly depressed Off
AIR COND SIG Engine: After warming up, idle the
engine Air conditioner switch: OFF Off
Air conditioner switch: ON
(Compressor operates.) On
PW/ST SIGNAL Engine: After warming up, idle the
engine Steering wheel: Not being turned Off
Steering wheel: Being turned On
LOAD SIGNAL Ignition switch: ON Rear window defogger switch: ON
and/or
Lighting switch: 2nd position On
Rear window defogger switch and lighting
switch: OFF Off
IGNITION SW Ignition switch: ON → OFF → ON On → Off → On
HEATER FAN SW Engine: After warming up, idle the
engine Heater fan switch: ON On
Heater fan switch: OFF Off
BRAKE SW Ignition switch: ON Brake pedal: Fully released Off
Brake pedal: Slightly depressed On
INJ PULSE-B1 • Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
•No load Idle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
INJ PULSE-B2 • Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
•No load Idle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING • Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
•No load Idle 7 - 17
°BTDC
2,000 rpm 25 - 45 °BTDC
CAL/LD VALUE • Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
•No load Idle 5 - 35%
2,500 rpm 5 - 35%
MASS AIRFLOW • Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
•No load Idle 2.0 - 6.0 g/s
2,500 rpm 7.0 - 20.0 g/s
PURG VOL C/V • Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
•No load Idle
(Accelerator pedal: Not depressed even
slightly, after engine starting.) 0%
2,000 rpm —
Monitor Item Condition Values/Status
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-616
< ECU DIAGNOSIS INFORMATION >[VQ35DE]
ECM
HO2S2 HTR (B2)Engine speed: Below 3,600 rpm after the following conditions are met.
• Engine: After warming up
• Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load On
Engine speed: Above 3,600 rpm Off
ALT DUTY SIG Power generation voltage variable control: Operating On
Power generation voltage variable control: Not operating Off
I/P PULLY SPD Vehicle speed: More than 20 km/h (12 MPH) Almost the same speed as
the tachometer indication
VEHICLE SPEED Turn drive wheels and compare CONSULT value with the speedometer indica-
tion. Almost the same speed as
the speedometer indication
IDL A/V LEARN Engine: Running Idle air volume learning has not been per-
formed yet. YET
Idle air volume learning has already been
performed successfully. CMPLT
TRVL AFTER MIL Ignition switch: ON Vehicle has traveled after MIL has illumi-
nated. 0 - 65,535 km
(0 - 40,723 miles)
ENG OIL TEMP Engine: After warming up More than 70 °C (158 °F)
VHCL SPEED SE Turn drive wheels and compare CONSULT value with the speedometer indica-
tion. Almost the same speed as
the speedometer indication
SET VHCL SPD Engine: Running ASCD: Operating The preset vehicle speed is
displayed
MAIN SW Ignition switch: ON MAIN switch: Pressed On
MAIN switch: Released Off
CANCEL SW Ignition switch: ON CANCEL switch: Pressed On
CANCEL switch: Released Off
RESUME/ACC SW Ignition switch: ON RESUME/ACCELERATE switch:
Pressed On
RESUME/ACCELERATE switch: Re-
leased Off
SET SW Ignition switch: ON SET/COAST switch: Pressed On
SET/COAST switch: Released Off
BRAKE SW1
(Brake pedal posi-
tion switch) Ignition switch: ON Brake pedal: Fully released On
Brake pedal: Slightly depressed Off
BRAKE SW2
(Stop lamp switch) Ignition switch: ON Brake pedal: Fully released Off
Brake pedal: Slightly depressed On
VHCL SPD CUT Ignition switch: ON Non
LO SPEED CUT Ignition switch: ON Non
AT OD MONITOR Ignition switch: ON Off
AT OD CANCEL Ignition switch: ON Off
CRUISE LAMP Ignition switch: ON MAIN switch: Pressed at the 1st time
→
at the 2nd time On
→ Off
SET LAMP • MAIN switch: ON
• When vehicle speed is between 40 km/h (25 MPH) and 144 km/h
(89 MPH) ASCD: Operating On
ASCD: Not operating Off
ALT DUTY Engine: Idle 0 - 80%
Monitor Item Condition Values/Status
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM