2014 NISSAN TEANA Service Manual

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Page 1913 of 4801

NISSAN TEANA 2014 Service Manual
P1572 ASCD BRAKE SWITCHEC-913
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
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EC
NP
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2.PERFORM COMPONENT FUNCTION CHECK-II
Check the voltage between ECM harness connectors.
Is the inspe

Page 1914 of 4801

NISSAN TEANA 2014 Service Manual
EC-914
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P1572 ASCD BRAKE SWITCH
Is the inspection result normal?
YES >> Check intermittent incident. Refer to
GI-43, "Intermittent Incident".
NO >> GO TO 6.
3.CHECK

Page 1915 of 4801

NISSAN TEANA 2014 Service Manual
P1572 ASCD BRAKE SWITCHEC-915
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
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EC
NP
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Is the inspection result normal?
YES >> GO TO 7.
NO >> Perform the trouble diagnosis for power suppl

Page 1916 of 4801

NISSAN TEANA 2014 Service Manual
EC-916
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P1572 ASCD BRAKE SWITCH
11 .CHECK STOP LAMP SWITCH SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check the continuity between stop lamp relay harnes

EC-916
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P1572 ASCD BRAKE SWITCH
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.
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-917, "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:0000000009462779
1.CHECK BRAKE PEDAL POSITION SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect brake pedal position switch harness connector.
3. Check the continuity between brake pedal positi on switch terminals under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK BRAKE PEDAL POSITION SWITCH-II
1. Adjust brake pedal position switch installation. Refer to BR-13, "Inspection and Adjustment"
.
2. Check the continuity between brake pedal positi on switch terminals under the following conditions.
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:0000000009462780
1.CHECK STOP LAMP SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between stop lamp switch terminals under the following conditions.
+ −
Continuity
Sto p l am p rela y EC M
Connector Terminal Connector Terminal E57 3 E32 122 Existed
Terminals Condition Continuity
1 and 2 Brake pedal Fully released Existed
Slightly depressed Not existed
Terminals Condition Continuity
1 and 2 Brake pedal Fully released Existed
Slightly depressed Not existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

Page 1917 of 4801

NISSAN TEANA 2014 Service Manual
P1572 ASCD BRAKE SWITCHEC-917
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
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NP
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Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH-II
1.

Page 1918 of 4801

NISSAN TEANA 2014 Service Manual
EC-918
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P1574 ASCD VEHICL
E SPEED SENSOR
P1574 ASCD VEHICLE SPEED SENSOR
DescriptionINFOID:0000000009462782
The ECM receives two vehicle speed signals via CAN communi

EC-918
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P1574 ASCD VEHICL
E SPEED SENSOR
P1574 ASCD VEHICLE SPEED SENSOR
DescriptionINFOID:0000000009462782
The ECM receives two vehicle speed signals via CAN communication line. One is sent from combination
meter, and the other is from TCM (Transmission contro l module). The ECM uses these signals for ASCD con-
trol. Refer to EC-574, "AUTOMATIC SPEED CONTROL DE VICE (ASCD) : System Description"
for ASCD
functions.
DTC LogicINFOID:0000000009462783
DTC DETECTION LOGIC
NOTE:
• If DTC P1574 is displayed with DTC UXXXX, first perform the tr ouble diagnosis for DTC UXXXX.
• If DTC P1574 is displayed with DTC P0500, first pe rform the trouble diagnosis for DTC P0500. Refer
to EC-867, "DTC Logic"
.
• If DTC P1574 is displayed with DTC P0605, first pe rform the trouble diagnosis for DTC P0605. Refer
to EC-883, "DTC Logic"
.
• If DTC P1574 is displayed with DTC P0607, first pe rform the trouble diagnosis for DTC P0607. Refer
to EC-884, "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 (VDC switch OFF).
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-918, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462784
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to TM-245, "CONSULT Function"
.
DTC No.Trouble diagnosis
name DTC detecting condition Possible cause
P1574 ASCD vehicle speed
sensor The difference the between two vehicle speed
signals is out of the specified range. • Harness or connectors
(The CAN communication line is open or
shorted.)
• Combination meter
• ABS actuator and electric unit (control unit)
• Wheel sensor
•TCM
•ECM
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

Page 1919 of 4801

NISSAN TEANA 2014 Service Manual
P1574 ASCD VEHICLE SPEED SENSOREC-919
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
C
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Is the inspection result normal?
YES >> GO TO 2.
NO >> Perform trouble shooting relevant to

Page 1920 of 4801

NISSAN TEANA 2014 Service Manual
EC-920
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P1800 VIAS CONTROL SOLENOID VALVE 1
P1800 VIAS CONTROL SOLENOID VALVE 1
DTC LogicINFOID:0000000009462792
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CON

EC-920
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
P1800 VIAS CONTROL SOLENOID VALVE 1
P1800 VIAS CONTROL SOLENOID VALVE 1
DTC LogicINFOID:0000000009462792
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 let it idle for at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-920, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462793
1.CHECK VIAS CONTROL SOLENOID VALVE 1 POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between VIAS control solenoid valve 1 harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
2.CHECK VIAS CONTROL SOLENOID VALVE 1 OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between VIAS control so lenoid valve 1 harness connector and ECM harness con-
nector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1800 VIAS control solenoid valve 1
circuit An excessively low or high voltage signal
is sent to ECM through the VIAS control
solenoid valve 1. • Harness or connectors
(The solenoid valve 1 circuit is open or
shorted.)
• VIAS control solenoid valve 1
VIAS control solenoid valve 1 Ground Voltage
Connector Terminal
F63 1 Ground Battery voltage
VIAS control solenoid valve 1 ECM Continuity
Connector Terminal Connector Terminal
F63 2 F78 39 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

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