2014 NISSAN TEANA power steering

SYSTEMEC-569
< SYSTEM DESCRIPTION > [VQ35DE]
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*1: ECM determines the start signal status
by the signals of engine speed and battery voltage.
*2: This sensor is not used to contro l the engine system under normal conditions.
*3: Automatic air conditioning system
*4: Manual air conditioning system
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). T he amount of fuel injected is a program value in the
ECM memory. The program value is preset by engi ne operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from t he crankshaft position sensor (POS), camshaft position
sensor (PHASE) and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compens ated to improve engine performance under various operat-
ing conditions as listed below.

• During warm-up
• When starting the engine
• During acceleration
• Hot-engine operation
• When selector lever position is changed from N to D
• High-load, high-speed operation

• During deceleration
• During high engine speed operation
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed
*1
Fuel injection
& mixture ratio
control Fuel injector
Camshaft position sensor (PHASE) Piston position
Mass air flow sensor Amount of intake air
Intake air temperature sensor Intake air temperature
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Transmission range switch Gear position
Battery Battery voltage
*1
Knock sensor Engine knocking condition
Heated oxygen sensor 2
*2Density of oxygen in exhaust gas
ABS actuator and electric unit (control unit) • VDC operation signal
• TCS operation signal
CAN communi-
cation
Power steering control module EPS operation signal
Combination meter Vehicle speed signal
A/C auto amp.
*3• A/C ON signal
• Blower fan ON signal
BCM
*4
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMEC-573
< SYSTEM DESCRIPTION > [VQ35DE]
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AIR CONDITIONING CUT CONTROL : System DescriptionINFOID:0000000009462517
SYSTEM DIAGRAM
*1: Automatic air conditioning system
*2: Manual air conditioning system
INPUT/OUTPUT SIGNAL CHART
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: Automatic air conditioning system
*3: Manual air conditioning system
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned OFF.
• When the accelerator pedal is fully depressed.
• When cranking the engine.
• At high engine speeds.
• When the engine coolant temperature becomes excessively high.
• When operating power steering during low engine speed or low vehicle speed.
JSBIA2685GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed
*1
Air conditioner
cut control IPDM E/R
↓
Air conditioner relay
↓
Compressor
Camshaft position sensor (PHASE)
Engine coolant temperature sensor Engine coolant temperature
Accelerator pedal position sensor Accelerator pedal position
Battery Battery voltage*1
Refrigerant pressure sensor Refrigerant pressure
Power steering control module EPS operation signal
CAN communi-
cation line
Combination meter Vehicle speed signal
A/C auto amp.
*2• A/C ON signal
• Blower fan ON signal
BCM
*3
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-582
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
Manual Air Conditioning System
INPUT/OUTPUT SIGNAL CHART
*1: ECM determines the start signal status
by the signals of engine speed and battery voltage.
*2: Automatic air conditioning system
*3: Manual air conditioning system
SYSTEM DESCRIPTION
ECM calculates the value of signal transmitted from t he accelerator pedal and activates the throttle valve by
transmitting a control signal to the electric throttle c ontrol actuator. This allows the optimum throttle angle and
improves drivability and fuel consumption. In addition, ECM learns the fully closed position every time when
the ignition switch is turned OFF to improv e the accuracy in throttle valve position.
When a malfunction occurs in the throttle control system , the throttle valve is closed by the return spring and
maintains the minimum engine speed by holding a slightly opened condition which is close to the fully opened
condition. This allows the securing of brake syste m, power steering system, and electric system and the
ensuring of the safety.
INTAKE VALVE TIMING CONTROL
JSBIA1917GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed
*1
Throttle controlElectric throttle control
actuator
Engine coolant temperature sensor Engine coolant temperature
Mass air flow sensor Amount of intake air
Intake air temperature sensor Intake air temperature
Accelerator pedal position sensor Accelerator pedal position
Ignition switch Start signal and ignition OFF
Combination meter CAN communi-
cation Vehicle speed signal
A/C auto amp.
*2CAN communi-
cation • A/C ON signal
• Blower fan ON signal
BCM
*3
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-604
< SYSTEM DESCRIPTION >[VQ35DE]
DIAGNOSIS SYSTEM (ECM)
EVAP SYS PRES VThe signal voltage of EVAP control
system pressure sensor is dis-
played.
FUEL LEVEL SE V ×The signal voltage of the fuel level
sensor is displayed.
START SIGNAL On/Off Indicates start signal status [On/Off]
computed by the ECM according to
the signals of engine speed and bat-
tery voltage. After starting the engine, [Off] is dis-
played regardless of the starter sig-
nal.
CLSD THL POS On/Off ××Indicates idle position [On/Off] com-
puted by ECM according to the ac-
celerator pedal position sensor
signal.
AIR COND SIG On/Off ××Indicates [On/Off] condition of the air
conditioner switch as determined by
the air conditioner signal.
PW/ST SIGNAL On/Off ××[On/Off] condition of the power
steering system (determined by the
signal voltage of the power steering
pressure sensor) is indicated.
LOAD SIGNAL On/Off ××Indicates [On/Off] condition from the
electrical load signal.
• On: Rear window defogger switch
is ON and/or lighting switch is in
2nd position.
• Off: Both rear window defogger
switch and lighting switch are
OFF.
IGNITION SW On/Off ××Indicates [On/Off] condition from ig-
nition switch signal.
HEATER FAN SW On/Off ×Indicates [On/Off] condition from the
heater fan switch signal.
BRAKE SW On/Off Indicates [On/Off] condition from the
stop lamp switch signal.
INJ PULSE-B1 msec Indicates the actual fuel injection
pulse width compensated by ECM
according to the input signals. When the engine is stopped, a cer-
tain computed value is indicated.
INJ PULSE-B2
IGN TIMING BTDC ×Indicates the ignition timing comput-
ed by ECM according to the input
signals. When the engine is stopped, a cer-
tain value is indicated.
CAL/LD VALUE % “Calculated load value” indicates the
value of the current air flow divided
by peak air flow.
MASS AIRFLOW g/s Indicates the mass air flow comput-
ed by ECM according to the signal
voltage of the mass air flow sensor.
PURG VOL C/V % • Indicates the EVAP canister purge
volume control solenoid valve
control value computed by the
ECM according to the input sig-
nals.
• The opening becomes larger as the value increases.
Monitored item Unit
Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-626
< ECU DIAGNOSIS INFORMATION >[VQ35DE]
ECM
96
(R) 64
(P) Sensor power supply
(Refrigerant pressure sensor) — [Ignition switch: ON] 5 V
97
(W) 100
(O) Accelerator pedal position
sensor 1 Input[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-
leased 0.5 - 1.0 V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-
pressed 4.2 - 4.8 V
98
(P) 11 6
(G) Accelerator pedal position
sensor 2 Input[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-
leased 0.25 - 0.50 V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-
pressed 2.0 - 2.5 V
99
(R) 100
(O) Sensor power supply
(Accelerator pedal position
sensor 1) — [Ignition switch: ON] 5 V
100 (O) —Sensor ground
(Accelerator pedal position
sensor 1) —— —
101 (O) 108
(R) ASCD steering switch Input [Ignition switch: ON]
ASCD steering switch: OFF 4 V
[Ignition switch: ON]
MAIN switch: Pressed 0 V
[Ignition switch: ON]
CANCEL switch: Pressed 1 V
[Ignition switch: ON]
RESUME/ACCELERATE
switch: Pressed 3 V
[Ignition switch: ON]
SET/COAST switch: Pressed 2 V
102 (G) 11 2
(R) EVAP control system pres-
sure sensor Input [Ignition switch: ON] 1.8 - 4.8 V
103 (G) 11 6
(G) Sensor power supply
(Accelerator pedal position
sensor 2) — [Ignition switch: ON] 5 V
104 (P) — Data link connector
Input/
Output ——
106 (Y) 128
(GR) EVAP canister vent control
valve Output [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
107 (P) 11 2
(R) Sensor power supply
(EVAP control system pres-
sure sensor, engine oil pres-
sure sensor) — [Ignition switch: ON] 5 V
108 (R) —Sensor ground
(ASCD steering switch) —— —
109 (L) 128
(GR) Ignition switch Input [Ignition switch: OFF] 0 V
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
Terminal No. Description
ConditionVa l u e
(Approx.)
+ -– Signal name Input/
Output
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-630
< ECU DIAGNOSIS INFORMATION >[VQ35DE]
ECM
DTC Index
INFOID:0000000009462545
× :Applicable —: Not applicable
2 P0031, P0032, P0051, P0052 Air fuel ratio (A/F) sensor 1 heater
P0037, P0038, P0057, P0058 Heated oxygen sensor 2 heater
P0075, P0081 Intake valve timing control solenoid valve
P0130, P0131, P0132, P014 C, P014D, P014E, P014F,
P0150, P0151, P0152, P209 6, P2097, P2098, P2099 Air fuel ratio (A/F) sensor 1
P0137, P0138, P0139, P0157, P0158, P0159 Heated oxygen sensor 2
P0441 EVAP control system purge flow monitoring
P0443, P0444, P0445 EVAP canister purge volume control solenoid valve
P0447, P0448 EVAP canister vent control valve
P0451, P0452, P0453 EVAP control system pressure sensor
P0603 ECM power supply
P1217 Engine over temperature (OVERHEAT)
P1800, P1801 VIAS cont rol solenoid valve
P1805 Brake switch
P2100, P2103 Throttle control motor relay
P2101 Electric throttle control function
P2118 Throttle control motor
3 P0011, P0021 Intake valve timing control P0171, P0172, P0174, P0175 Fuel injection system function
P0300 - P0306 Misfire
P0420, P0430 Three way catalyst function
P0456 EVAP control syst em (VERY SMALL LEAK)
P0506, P0507 Idle speed control system
P050A, P050E Cold start control
P0524 Engine oil pressure
P1148, P1168 Closed loop control
P1212 TCS communication line
P1564 ASCD steering switch
P1572 Brake pedal position switch
P1574 ASCD vehicle speed sensor
P2119 Electric throttle control actuator
Priority Detected items (DTC) Detected items (DTC)
DTC*1
Items
(CONSULT screen terms) SRT
code Trip MIL Permanent
DTC group*4Refer-
ence page
CONSULT
GST
*2ECM*3
U0101 0101*5LOST COMM (ECM) — 1 ×BEC-713
U1001
1001*5CAN COMM CIRCUIT — 2 — — EC-714
P0000 0000NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. ——
Blinking*6——
P0011 0011 INT/V TIM CONT-B1 ×2 ×BEC-715
P0021 0021 INT/V TIM CONT-B2 ×2 ×BEC-715
P0031 0031 A/F SEN1 HTR (B1) — 2 ×BEC-719
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-706
< DTC/CIRCUIT DIAGNOSIS >[VQ35DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
15.DISCONNECT AND RECONNE
CT ECM HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it.
>> GO TO 16.
16.CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “ SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Detect malfunctioning part according to EC-987, "Symptom Table"
.
17.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO-1 >> More than the SP value: GO TO 18.
NO-2 >> Less than the SP value: GO TO 25.
18.DETECT MALFUNCTIONING PART
1. Check for the cause of large engine friction. Refer to the following.
- Engine oil level is too high
- Engine oil viscosity
- Belt tension of power steering, alternat or, A/C compressor, etc. is excessive
- Noise from engine
- Noise from transmission, etc.
2. Check for the cause of insufficient combustion. Refer to the following.
- Valve clearance malfunction
- Intake valve timing control function malfunction
- Camshaft sprocket installation malfunction, etc.
>> Repair or replace malfunctioning part, and then GO TO 30.
19.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
• Crushed air ducts
• Malfunctioning seal of air cleaner element
• Uneven dirt of air cleaner element
• Improper specification of intake air system
Is the inspection result normal?
YES >> GO TO 21.
NO >> Repair or replace malfunctioning part, and then GO TO 20.
20.CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”, AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1”, “A/F ALPHA-B2”, and “B/F UEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and
check that each indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> “B/FUEL SCHDL” is more, “A/F ALPHA-B1”, “A /F ALPHA-B2” are less than the SP value: GO TO
21.
21.DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
1. Stop the engine.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0506 ISC SYSTEMEC-869
< DTC/CIRCUIT DIAGNOSIS > [VQ35DE]
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P0506 ISC SYSTEM
DescriptionINFOID:0000000009462717
The ECM controls the engine idle speed to a specified leve
l through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric thrott le control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idli ng speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is t he lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan
operation, etc.).
DTC LogicINFOID:0000000009462718
DTC DETECTION LOGIC
NOTE:
If DTC P0506 is displayed with ot her DTC, first perform the trouble diagnosis for the other DTC.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, 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.
If the target idle speed is out of the specified value, perform EC-683, "Work Procedure"
, before con-
ducting DTC CONFIRMATION PROCEDURE.
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
• Always perform the test at a temperature above −10 °C(14 °F).
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Restart engine and run it for at least 1 minute at idle speed.
6. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed to EC-869, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462719
1.CHECK INTAKE AIR LEAKAGE
1. Start engine and let it idle.
2. Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0506 Idle speed control sys-
tem RPM lower than ex-
pected The idle speed is less than the target idle speed
by 100 rpm or more. • Electric throttle control actuator
• Intake air leakage
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM