2003 NISSAN ALMERA N16 ecm

VSS
EC-677
[QG (WITHOUT EURO-OBD)]
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VSSPFP:32702
DescriptionEBS00KLE
NOTE:
If DTC U1000 or U1001 is displayed, first perform the trouble diagnosis for DTC U1000, U1001. Refer to
EC-492, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
The vehicle speed signal is sent from vehicle speed sensor (models with ABS) or ABS actuator and electric
unit (control unit) (models with ABS) to combination meter. The combination meter then sends a signal to the
ECM through CAN communication line.
Diagnostic ProcedureEBS00KLF
1.CHECK VEHICLE SPEED SIGNAL OVERALL FUNCTION
With CONSULT-II
1. Lift up the vehicle.
2. Start engine.
3. Select “VHCL SPEED SE” in “DATA MONITOR” mode with
CONSULT-II.
4. Make sure that “VHCL SPEED SE” indication exceeds 10 km/h
(6 MPH) when rotating wheels with suitable gear position.
Without CONSULT-II
1. Lift up the vehicle.
2. Start engine.
3. Read vehicle speed with combination meter.
Make sure that vehicle speed indication exceeds 10 km/h (6 MPH) when rotating wheels with suitable
gear position.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2.CHECK DTC WITH VEHICLE SPEED SONSOR (MODELS WITHOUT ABS) OR ABS ACTUATOR AND
ELECTRIC UNIT (CONTROL UNIT) (MODELS WITH ABS)
Refer to EL-123 (models without ABS) or EL-124 (models with ABS).
OK or NG
OK >> GO TO 2.
NG >> Repair or replace.
3.CHECK COMBINATION METER
Check combination meter function.
Refer to EL-112.
>>INSPECTION END
SEF196Y

EC-678
[QG (WITHOUT EURO-OBD)]
POWER STEERING PRESSURE SENSOR
POWER STEERING PRESSURE SENSOR
PFP:49763
Component DescriptionEBS00KLG
Power steering pressure (PSP) sensor is installed to the power
steering high-pressure tube and detects a power steering load. This
sensor is a potentiometer which transforms the power steering load
into output voltage, and emits the voltage signal to the ECM. The
ECM controls the electric throttle control actuator and adjusts the
throttle valve opening angle to increase the engine speed and
adjusts the idle speed for the increased load.
CONSULT-II Reference Value in Data Monitor ModeEBS00KLH
Specification data are reference values.
MBIB0250E
MONITOR ITEM CONDITION SPECIFICATION
PW/ST SIGNAL
●Engine: After warming up, idle
the engineSteering wheel is in neutral position.
(Forward direction)OFF
Steering wheel is turned. ON

EC-680
[QG (WITHOUT EURO-OBD)]
POWER STEERING PRESSURE SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureEBS00KLJ
1. INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 3.
2. CHECK POWER STEERING PRESSURE SENSOR OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Check “PW/ST SIGNAL” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
12 LPower steering pressure
sensor[Engine is running]
●Steering wheel is being turned.0.5 - 4.0V
[Engine is running]
●Steering wheel is not being turned.0.4 - 0.8V
57 BSensor ground
(Power steering pressure
sensor)[Engine is running]
●Idle speedApproximately 0V
65 GSensor power supply
(Power steering pressure
sensor)[Ignition switch “ON”]Approximately 5V
Steering in neutral position OFF
Steering is turned ON
PBIB0646E

POWER STEERING PRESSURE SENSOR
EC-681
[QG (WITHOUT EURO-OBD)]
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3.CHECK POWER STEERING PRESSURE SENSOR OVERALL FUNCTION
Without CONSULT-II
1. Start engine.
2. Check voltage between ECM terminal 12 and ground under the
following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 4.
4.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 5.
5.CHECK PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect PSP sensor harness connector.
2. Turn ignition switch “ON”.
3. Check voltage between PSP sensor terminal 3 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
Condition Voltage
Steering wheel is being turned. 0.5 - 4.0V
Steering wheel is not being turned. 0.4 - 0.8V
MBIB0126E
MBIB0095E
MBIB0250E
Voltage: Approximately 5V
SEF509Y

EC-682
[QG (WITHOUT EURO-OBD)]
POWER STEERING PRESSURE SENSOR
6. CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 57 and PSP sensor terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
8. CHECK PSP SENSOR
Refer to EC-682, "
Component Inspection" .
OK or NG
OK >> GO TO 9.
NG >> Replace PSP sensor.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-485, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00KLK
POWER STEERING PRESSURE SENSOR
1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 12 and ground under the
following conditions.Continuity should exist.
Continuity should exist.
Condition Voltage
Steering wheel is being turned fully. 0.5 - 4.0V
Steering wheel is not being turned. 0.4 - 0.8V
MBIB0025E

IVT CONTROL SOLENOID VALVE
EC-683
[QG (WITHOUT EURO-OBD)]
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IVT CONTROL SOLENOID VALVEPFP:23796
DescriptionEBS00KLL
SYSTEM DESCRIPTION
*: This signal is sent to the ECM through CAN communication line.
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to
increase engine torque in low/mid speed range and output in high-speed range.
COMPONENT DESCRIPTION
Intake valve timing control solenoid valve is activated by ON/OFF
pulse duty (ratio) signals from the ECM.
The intake valve timing control solenoid valve changes the oil
amount and direction of flow through intake valve timing control unit
or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.
CONSULT-II Reference Value in Data Monitor ModeEBS00KLM
Specification data are reference values.
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed
Intake valve
timing controlIntake valve timing control
solenoid valve Camshaft position sensor (PHASE)
Engine coolant temperature sensor Engine coolant temperature
Vehicle speed signal
*Vehicle speed
MBIB0121E
PBIB0195E

EC-686
[QG (WITHOUT EURO-OBD)]
IVT CONTROL SOLENOID VALVE
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureEBS00KLO
1. CHECK IVT CONTROL SOLENOID VALVE OVERALL FUNCTION CHECK
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. Set the tester probe between ECM terminals 62 (IVT control solenoid valve signal) and ground.
5. Start engine and let it idle.
6. Check the voltage under the following conditions.
Verify that the oscilloscope screen shows the signal wave as
shown below.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
62 Y/RIntake valve timing
control solenoid valve[Engine is running]
●Warm-up condition
●Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Warm-up condition
●When revving engine up to 2,000 rpm quickly.7 - 10V
PBIB0532E
Conditions Voltage
At idleBATTERY VOLTAGE
(11 - 14V)
When revving engine up
to 2,000 rpm quickly7 - 10V
MBIB0042E
PBIB0532E

IVT CONTROL SOLENOID VALVE
EC-687
[QG (WITHOUT EURO-OBD)]
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2.CHECK IVT CONTROL SOLENOID VALVE POWER SUPPLY CIRCIUT
1. Turn ignition switch “OFF”.
2. Disconnect intake valve timing control solenoid valve harness
connector.
3. Turn ignition switch “ON”.
4. Check voltage between intake valve timing control solenoid
valve terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTION PART
Check the following.
●Harness connectors E225, F43
●Harness for open or short between intake valve timing control solenoid valve and ECM relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK IVT CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 62 and intake valve timing control solenoid valve termi-
nal 2. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EC-688, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace intake valve timing control solenoid valve.
MBIB0106E
Voltage: Battery voltage
PBIB0285E
Continuity should exist.