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Nissan Almera Tino V10 (2001 year). Manual - part 52

Description

NLEC0349

SYSTEM DESCRIPTION

NLEC0349S01

Sensor

Input Signal to ECM

ECM func-

tion

Actuator

Crankshaft position sensor (POS)

Engine speed

EGR vol-
ume control

EGR volume control valve

Camshaft position sensor (PHASE)

Engine speed and cylinder number

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Ignition switch

Start signal

Throttle position sensor

Throttle position

Vehicle speed sensor

Vehicle speed

Battery

Battery voltage

This system controls flow rate of EGR led from exhaust manifold
to intake manifold. The opening of the EGR by-pass passage in the
EGR volume control valve changes to control the flow rate. A
built-in step motor moves the valve in steps corresponding to the
ECM output pulses. The opening of the valve varies for optimum
engine control. The optimum value stored in the ECM is determined
by considering various engine conditions. The EGR volume control
valve remains close under the following conditions.

Extremely light load engine operation

Mass air flow sensor malfunction

Engine idling

Low engine coolant temperature

Excessively high engine coolant temperature

High-speed engine operation

Wide open throttle

Low battery voltage

Engine starting

SEF551W

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

Description

EC-393

SEF552W

COMPONENT DESCRIPTION

NLEC0349S02

EGR Volume Control Valve

NLEC0349S0201

The EGR volume control valve uses a step motor to control the flow
rate of EGR from exhaust manifold. This motor has four winding
phases. It operates according to the output pulse signal of the
ECM. Two windings are turned ON and OFF in sequence. Each
time an ON pulse is issued, the valve opens or closes, changing
the flow rate. When no change in the flow rate is needed, the ECM
does not issue the pulse signal. A certain voltage signal is issued
so that the valve remains at that particular opening.

CONSULT-II Reference Value in Data Monitor
Mode

NLEC0539

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

EGR TEMP SEN

Engine: After warming up

Less than 4.5V

EGR VOL CON/V

Engine: After warming up

Air conditioner switch: “OFF”

Shift lever: “N”

No-load

Idle

0 step

Revving engine up to 3,000 rpm
quickly

10 - 55 step

ECM Terminals and Reference Value

NLEC0540

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.

TERMI-

NAL NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

8
9

17
18

SB
W/B
R/Y
BR/R

EGR volume control valve

[Engine is running.]

Warm-up condition

Idle speed

0 - 14V

Sensor’s ground

[Engine is running.]

Warm-up condition

Idle speed

P/B

EGR temperature sensor

[Engine is running.]

Warm-up condition

Idle speed

Less than 4.5V

[Engine is running.]

Warm-up condition

EGR system is operating.

0 - 1.0V

SEF073P

On Board Diagnosis Logic

NLEC0350

If EGR temperature sensor detects EGR flow under the condition
that does not call for EGR, a high-flow malfunction is diagnosed.
NOTE:
Diagnosis for this DTC will occur when engine coolant temperature
is below 50 to 60°C (122 to 140°F). Therefore, it will be better to
turn ignition switch “ON” (start engine) at the engine coolant tem-
perature below 30°C (86°F) when starting DTC confirmation pro-
cedure.

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

Description (Cont’d)

EC-394

DTC No.

Malfunction is detected when ...

Check Items (Possible Cause)

P1402
1402

EGR flow is detected under conditions that do not call for
EGR.

Harness or connectors
(The valve circuit is open or shorted.)

EGR volume control valve leaking or stuck open

EGR temperature sensor

SEF202Y

SEF851Y

SEF852Y

SEF236Y

DTC Confirmation Procedure

NLEC0351

NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 9 seconds
before conducting the next test.
TESTING CONDITION:

Always perform at a temperature above −10°C (14°F).

Engine coolant temperature and EGR temperature must
be verified in “DATA MONITOR” mode with CONSULT-II
before starting DTC WORK SUPPORT test. If it is out of
range below, the test cannot be conducted.
COOLAN TEMP/S: −10 to 40°C (14 to 104°F)*
EGR TEMP SEN: Less than 4.8V
If the values are out of the ranges indicated above, park
the vehicle in a cool place and allow the engine tempera-
ture to stabilize. Do not attempt to reduce the engine cool-
ant or EGR temperature with a fan or means other than
ambient air. Doing so may produce an inaccurate diagnos-
tic result.

*: Although CONSULT-II screen displays “−10 to 40°C (14 to
104°F)” as a range of engine coolant temperature, ignore it.

With CONSULT-II

Turn ignition switch “OFF” and wait at least 9 seconds, then
turn ignition switch “ON”.

Select “EGR SYSTEM P1402” of “EGR SYSTEM” in “DTC
WORK SUPPORT” mode with CONSULT-II.

Touch “START”. Follow instruction of CONSULT-II.

Start engine and let it idle until “TESTING” on CONSULT-II
screen is turned to “COMPLETED”. (It will take 45 seconds or
more.)
If “TESTING” is not displayed after 5 minutes, turn ignition
“OFF” and cool the engine coolant temperature to the
range of −10 to 40°C (14 to 104°F). Retry from step 1.

Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”.

“NG”

displayed,

refer

“Diagnostic

Procedure”, EC-399.

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

On Board Diagnosis Logic (Cont’d)

EC-395

SEF947X

With GST

Turn ignition switch “ON” and select “MODE 1” with GST.

Check that engine coolant temperature is within the range of
−10 to 40°C (14 to 104°F).

Check that voltage between ECM terminal 72 (EGR tempera-
ture sensor signal) and ground is less than 4.8V.

Start engine and let it idle for at least 45 seconds.

Stop engine.

Perform from step 1 to 4.

Select “MODE 3” with GST.

If DTC is detected, go to “Diagnostic Procedure”, EC-399.

When using GST, “DTC Confirmation Procedure” should
be performed twice as much as when using CONSULT-II
because GST cannot display MODE 7 (1st trip DTC) con-
cerning this diagnosis. Therefore, using CONSULT-II is
recommended.

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

DTC Confirmation Procedure (Cont’d)

EC-396

Wiring Diagram

NLEC0352

MODELS WITH ECM IN ENGINE COMPARTMENT

NLEC0352S01

YEC664

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

Wiring Diagram

EC-397

MODELS WITH ECM IN CABIN

NLEC0352S02

YEC884

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

Wiring Diagram (Cont’d)

EC-398

Diagnostic Procedure

NLEC0353

CHECK POWER SUPPLY

1. Disconnect EGR volume control valve harness connector.
2. Turn ignition switch “ON”.
3. Check voltage between terminals 2, 5 and ground with CONSULT-II or tester.

SEF327X

OK or NG

GO TO 3.

GO TO 2.

DETECT MALFUNCTIONING PART

Check the harness for open or short between EGR volume control valve and ECM relay.

Repair harness or connectors.

CHECK OUTPUT SIGNAL CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between

ECM terminal 8 and EGR volume control valve terminal 1,
ECM terminal 9 and EGR volume control valve terminal 4,
ECM terminal 17 and EGR volume control valve terminal 3,
ECM terminal 18 and EGR volume control valve terminal 6.
Refer to wiring diagram.

Continuity should exist.

4. Also check harness for short to ground and short to power.

OK or NG

GO TO 4.

Repair open circuit, short to ground or short to power in harness connectors.

CHECK EGR TEMPERATURE SENSOR

Refer to “COMPONENT INSPECTION”, EC-400.

OK or NG

GO TO 5.

Replace EGR temperature sensor.

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

Diagnostic Procedure

EC-399

CHECK EGR VOLUME CONTROL VALVE

Refer to “COMPONENT INSPECTION”, EC-400.

OK or NG

GO TO 6.

Replace EGR volume control valve.

CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145.

INSPECTION END

SEF611Y

SEF068XA

Component Inspection

NLEC0354

EGR TEMPERATURE SENSOR

NLEC0354S01

Check resistance change and resistance value.
<Reference data>

EGR temperature

°C (°F)

Voltage

Resistance

Ω

0 (32)

4.56

0.62 - 1.05

50 (122)

2.25

0.065 - 0.094

100 (212)

0.59

0.011 - 0.015

If NG, replace EGR temperature sensor.

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

Diagnostic Procedure (Cont’d)

EC-400

SEF069X

SEF783Z

SEF015Y

SEF560W

EGR VOLUME CONTROL VALVE

NLEC0354S04

With CONSULT-II

Disconnect EGR volume control valve harness connector.

Check resistance between the following terminals.
terminal 2 and terminals 1, 3
terminal 5 and terminals 4, 6

Temperature °C (°F)

Resistance

Ω

20 (68)

20 - 24

Reconnect EGR volume control valve harness connector.

Remove EGR volume control valve from cylinder head.
(The EGR volume control valve harness connector should
remain connected.)

Turn ignition switch “ON”.

Perform “EGR VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that EGR volume control valve shaft
moves smoothly forward and backward according to the valve
opening
If NG, replace the EGR volume control valve.

Without CONSULT-II

Disconnect EGR volume control valve harness connector.

Check resistance between the following terminals.
terminal 2 and terminals 1, 3
terminal 5 and terminals 4, 6

Temperature °C (°F)

Resistance

Ω

20 (68)

20 - 24

Turn ignition switch “ON” and “OFF”. Check that EGR volume
control valve shaft moves smoothly forward and backward
according to the ignition switch position.
If NG, replace the EGR volume control valve.

DTC P1402 EGR FUNCTION (OPEN) (WHERE FITTED)

QG18DE

Component Inspection (Cont’d)

EC-401

SEF631Z

Component Description

NLEC0424

When the gear position is “N”, park/neutral position (PNP) switch
is “ON”.
ECM detects the park/neutral position when continuity with ground
exists.

CONSULT-II Reference Value in Data Monitor
Mode

NLEC0425

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

P/N POSI SW

Ignition switch: ON

Shift lever: “N”

Except above

OFF

ECM Terminals and Reference Value

NLEC0426

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.

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

G/OR

PNP switch

[Ignition switch “ON”]

Gear position is “Neutral position”

Approximately 0V

[Ignition switch “ON”]

Except the above gear position

Approximately 5V

On Board Diagnosis Logic

NLEC0427

DTC No.

Malfunction is detected when ...

Check Items (Possible Cause)

P1706
1706

The signal of the PNP switch is not changed in the pro-
cess of engine starting and driving.

Harness or connectors
(The PNP switch circuit is open or shorted.)

PNP switch

DTC Confirmation Procedure

NLEC0428

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 9 seconds
before conducting the next test.

With CONSULT-II

Turn ignition switch “ON”.

DTC P1706 PARK/NEUTRAL POSITION (PNP) SWITCH

QG18DE

Component Description

EC-402

SEF213Y

Select “P/N POSI SW” in “DATA MONITOR” mode with CON-
SULT-II. Then check the “P/N POSI SW” signal under the fol-
lowing conditions.

Position (Selector lever)

Known-good signal

“N” position

Except the above position

OFF

If NG, go to “Diagnostic Procedure”, EC-405.
If OK, go to following step.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and warm it up to normal operating temperature.

Maintain the following conditions for at least 50 consecutive
seconds.

ENG SPEED

1,550 - 4,000 rpm

COOLAN TEMP/S

More than 70°C (158°F)

B/FUEL SCHDL

3.0 msec or more

VHCL SPEED SE

70 - 130 km/h (43 - 81 MPH)

Selector lever

Suitable position

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-405.

SEF137X

Overall Function Check

NLEC0429

Use this procedure to check the overall function of the park/neutral
position switch circuit. During this check, a 1st trip DTC might not
be confirmed.

Without CONSULT-II

Turn ignition switch “ON”.

Check voltage between ECM terminal 42 (PNP switch signal)
and body ground under the following conditions.

Condition (Gear position)

Voltage (V) (Known good data)

“N” position

Approx. 0

Except the above position

Approx. 5

If NG, go to “Diagnostic Procedure”, EC-405.

DTC P1706 PARK/NEUTRAL POSITION (PNP) SWITCH

QG18DE

DTC Confirmation Procedure (Cont’d)

EC-403

Wiring Diagram

NLEC0430

YEC671

DTC P1706 PARK/NEUTRAL POSITION (PNP) SWITCH

QG18DE

Wiring Diagram

EC-404

Diagnostic Procedure

NLEC0431

CHECK GROUND CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect PNP switch harness connector.

SEF631Z

3. Check harness continuity between PNP switch harness connector terminal 2 and body ground.

Refer to wiring diagram.

Continuity should exist.

4. Also check harness for short to power.

OK or NG

GO TO 3.

GO TO 2.

DETECT MALFUNCTIONING PART

Check the harness for open or short between PNP switch and body ground.

Repair open circuit or short to power in harness or connectors.

CHECK INPUT SIGNAL CIRCUIT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 42 and PNP switch harness connector terminal 1.

Refer to wiring diagram.

Continuity should exist.

3. Also check harness for short to ground and short to power.

OK or NG

GO TO 5.

GO TO 4.

DETECT MALFUNCTIONING PART

Check the harness for open or short between ECM and PNP switch.

Repair open circuit or short to ground or short to power in harness or connectors.

CHECK PNP SWITCH

Refer to MT-16, “POSITION SWITCH CHECK”.

OK or NG

GO TO 6.

Replace PNP switch.

DTC P1706 PARK/NEUTRAL POSITION (PNP) SWITCH

QG18DE

Diagnostic Procedure

EC-405

CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-145.

INSPECTION END

DTC P1706 PARK/NEUTRAL POSITION (PNP) SWITCH

QG18DE

Diagnostic Procedure (Cont’d)

EC-406

SEF206T

Component Description

NLEC1275

MODELS WITH INTAKE AIR TEMPERATURE SENSOR
ON INTAKE AIR DUCT

NLEC1275S01

The intake air temperature sensor is mounted to the air duct hous-
ing. The sensor detects intake air temperature and transmits a sig-
nal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive
to the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.

SEF012P

Intake air temperature

°C (°F)

Voltage*

Resistance

Ω

20 (68)

3.5

2.1 - 2.9

80 (176)

1.23

0.27 - 0.38

*: These data are reference values and are measured between ECM terminal 64
(Intake air temperature sensor) and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.

SEF987W

MODELS WITH INTAKE AIR TEMPERATURE SENSOR
IN MASS AIR FLOW SENSOR

NLEC1275S02

The intake air temperature sensor is built into the mass air flow
sensor. The sensor detects intake air temperature and transmits a
signal to the ECM.
The temperature sensing unit uses a thermistor which is sensitive
to the change in temperature. Electrical resistance of the thermistor
decreases in response to the temperature rise.

SEF012P

Intake air temperature

°C (°F)

Voltage*

Resistance

Ω

20 (68)

3.5

2.1 - 2.9

80 (176)

1.23

0.27 - 0.38

*: These data are reference values and are measured between ECM terminal 64
(Intake air temperature sensor) and ground.

INTAKE AIR TEMPERATURE SENSOR

QG18DE

Component Description

EC-407

CAUTION:

Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use a ground other than ECM terminals, such as
the ground.

INTAKE AIR TEMPERATURE SENSOR

QG18DE

Component Description (Cont’d)

EC-408

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