Nissan Almera Tino V10 (2001 year). Manual - part 79

SEF998R

SEF853B

Component Description

NLEC1761

The camshaft position sensor is a basic component of the engine
control system. It monitors engine speed and piston position.
These input signals to the engine control system are used to con-
trol fuel injection, ignition timing and other functions.
The camshaft position sensor has a rotor plate and a wave-form-
ing circuit. The rotor plate has 360 slits for a 1° (POS) signal and
4 slits for a 180° (REF) signal. The wave-forming circuit consists
of Light Emitting Diodes (LED) and photo diodes.
The rotor plate is positioned between the LED and the photo diode.
The LED transmits light to the photo diode. As the rotor plate turns,
the slits cut the light to generate rough-shaped pulses. These
pulses are converted into on-off signals by the wave-forming circuit
and sent to the ECM.
The distributor is not repairable and must be replaced as an
assembly except distributor cap and rotor head.

ECM Terminals and Reference Value

NLEC1762

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)

Camshaft position sen-
sor (Reference signal)

[Engine is running]

Warm-up condition

Idle speed

0.1 - 0.4V

SEF006W

[Engine is running]

Engine speed is 2,000 rpm

0.1 - 0.4V

SEF007W

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

Component Description

EC-825

TERMI-

NAL

NO.

WIRE

COLOR

ITEM CONDITION DATA (DC Voltage)

85 B/W

Camshaft position sen-
sor (Position signal)

[Engine is running]

Warm-up condition

Idle speed

Approximately 2.5V

SEF004W

[Engine is running]

Engine speed is 2,000 rpm

Approximately 2.4V

SEF005W

On Board Diagnosis Logic

NLEC1763

DTC No. Malfunction is detected when ... Check Items (Possible Cause)

P0340
0340

A) Either 1° or 180° signal is not sent to ECM for the

first few seconds during engine cranking.

Harness or connectors
(The camshaft position sensor circuit is open or
shorted.)

Camshaft position sensor

Starter motor (Refer to SC-13, “STARTING SYS-
TEM”.)

Starting system circuit (Refer to SC-13, “START-
ING SYSTEM”.)

Dead (Weak) battery

B) Either 1° or 180° signal is not sent to ECM often

enough while the engine speed is higher than the
specified engine speed.

C) The relation between 1° and 180° signal is not in

the normal range during the specified engine
speed.

DTC Confirmation Procedure

NLEC1764

Perform “Procedure for malfunction A” first. If DTC cannot be
confirmed, perform “Procedure for malfunction B and C”.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is more than 10.5V.

SEF058Y

PROCEDURE FOR MALFUNCTION A

NLEC1764S01

With CONSULT-II

1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Crank engine for at least 2 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,

EC-830.

With GST

Follow the procedure “With CONSULT-II” above.

No Tools

1) Crank engine for at least 2 seconds.

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

ECM Terminals and Reference Value (Cont’d)

EC-826

Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.

Perform “Diagnostic Test Mode II” (Self-diagnostic results) with
ECM.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-830.

SEF058Y

PROCEDURE FOR MALFUNCTION B AND C

NLEC1764S02

With CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and run it for at least 2 seconds at idle speed.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-830.

With GST

Follow the procedure “With CONSULT-II” above.

No Tools

Start engine and run it for at least 2 seconds at idle speed.

Turn ignition switch “OFF”, wait at least 10 seconds and then
turn “ON”.

Perform “Diagnostic Test Mode II” (Self-diagnostic results) with
ECM.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-830.

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

DTC Confirmation Procedure (Cont’d)

EC-827

Wiring Diagram

NLEC1765

MODELS WITH ECM IN ENGINE COMPARTMENT

NLEC1765S01

YEC699

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

Wiring Diagram

EC-828

MODELS WITH ECM IN CABIN

NLEC1765S02

YEC922

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

Wiring Diagram (Cont’d)

EC-829

Diagnostic Procedure

NLEC1766

1 CHECK STARTING SYSTEM

Does the engine turn over?
(Does the starter motor operate?)

Yes or No

Yes

GO TO 2.

Check starting system. (Refer to SC-13, “STARTING SYSTEM”.)

2 RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEF202X

GO TO 3.

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

Diagnostic Procedure

EC-830

CHECK POWER SUPPLY

1. Disconnect camshaft position sensor harness connector.

SEF211X

2. Turn ignition switch “ON”.
3. Check voltage between CMPS terminal 2 and ground with CONSULT-II or tester.

SEF232W

Voltage: Battery voltage

OK or NG

GO TO 5.

GO TO 4.

DETECT MALFUNCTIONING PART

Check the following.

Joint connector-3 (where fitted)

Harness connectors E76, F36 (where fitted)

Joint connector F46 (where fitted)

Harness for open or short between CMPS and ECM relay

Harness for open or short between CMPS and ECM

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

CHECK INPUT SIGNAL CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between CMPS terminal 3 and ECM terminal 85, CMPS terminal 4 and ECM terminals 66,

75.
Refer to Wiring Diagram.

Continuity should exist.

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

OK or NG

GO TO 6.

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

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

Diagnostic Procedure (Cont’d)

EC-831

CHECK GROUND CIRCUIT

1. Turn ignition switch “OFF”.
2. Check harness continuity between CMPS terminal 1 and engine ground.

SEF234W

Continuity should exist.

3. Also check harness for short to power.

OK or NG

GO TO 8.

GO TO 7.

DETECT MALFUNCTIONING PART

Check the following.

Joint connector-2 (where fitted)

Joint connector F46 (where fitted)

Harness for open or short between CMPS and engine ground

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

CHECK CAMSHAFT POSITION SENSOR

Refer to “Component Inspection”, EC-833.

OK or NG

GO TO 9.

Replace camshaft position sensor.

CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.

INSPECTION END

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

Diagnostic Procedure (Cont’d)

EC-832

SEF215X

Component Inspection

=NLEC1767

CAMSHAFT POSITION SENSOR

NLEC1767S01

Start engine and warm it up to normal operating temperature.

Check voltage between ECM terminals 66, 85 and engine
ground under the following conditions.

Terminal 66 (or 75) and engine ground

Condition

Idle

2,000 rpm

Voltage

0.1 - 0.4V

Pulse signal

SEF006W

SEF007W

Terminal 85 and engine ground

Condition

Idle

2,000 rpm

Voltage

Approximately 2.5V

Approximately 2.4V

Pulse signal

SEF004W

SEF005W

If NG, replace distributor assembly with camshaft position sensor.

DTC P0340 CAMSHAFT POSITION SENSOR (CMPS)

SR20DE

Component Inspection

EC-833

Description

NLEC1545

SYSTEM DESCRIPTION

NLEC1545S01

Sensor

Input Signal to ECM

ECM func-

tion

Actuator

Camshaft position sensor

Engine speed

EGR vol-
ume control

EGR volume control valve

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

Air conditioner switch

Air conditioner operation

Power steering oil pressure switch

Power steering load signal

Electrical load

Electrical load signal

PNP switch

Park/Neutral position signal

TCM (Transmission Control Module)

Gear position, shifting signal

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.

Low engine coolant temperature

Engine starting

High-speed engine operation

Extremely light load engine operation

Engine idling

Excessively high engine coolant temperature

Wide open throttle

Mass air flow sensor malfunction

Low battery voltage

SEF551W

DTC P0400 EGR FUNCTION (CLOSED) (WHERE FITTED)

SR20DE

Description

EC-834

SEF552W

COMPONENT DESCRIPTION

NLEC1545S02

EGR Volume Control Valve

NLEC1545S0201

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

NLEC1546

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

NLEC1547

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/W
G/R

EGR volume control valve

[Engine is running]

Idle speed

0 - 14V

Sensor’s ground

[Engine is running]

Warm-up condition

Idle speed

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 - 1V

SEF073P

On Board Diagnosis Logic

NLEC1548

If the absence of EGR flow is detected by EGR temperature sen-
sor under the condition that calls for EGR, a low-flow malfunction
is diagnosed.

DTC P0400 EGR FUNCTION (CLOSED) (WHERE FITTED)

SR20DE

Description (Cont’d)

EC-835

DTC No.

Malfunction is detected when ...

Check Items (Possible Cause)

P0400

No EGR flow is detected under conditions that call for
EGR.

Harness or connectors
(EGR volume control valve circuit is open or
shorted.)

EGR volume control valve stuck closed

Dead (Weak) battery

EGR passage clogged

EGR temperature sensor and circuit

Exhaust gas leaks

SEF013Y

SEF845Y

SEF846Y

SEF235Y

DTC Confirmation Procedure

NLEC1549

CAUTION:

Always drive vehicle at a safe speed.
NOTE:

“DTC

Confirmation

Procedure”

has

been

previously

conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.

P0400 will not be displayed at “SELF-DIAG RESULTS” mode
with CONSULT-II even though DTC work support test result is
“NG”.

TESTING CONDITION:

Before performing the following procedure, confirm bat-
tery voltage is more than 10V at idle, then stop engine
immediately.

For best result, perform the test at a temperature of 0°C
(32°F) or higher.

With CONSULT-II

Turn ignition switch “OFF” and wait at least 10 seconds.

Turn ignition switch “ON”.

Check “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II and confirm it is within the range listed below.

COOLAN TEMP/S: Less than 40°C (104°F)

If the value is out of range, park the vehicle in a cool place and
allow the engine temperature to stabilize. Do not attempt to
lower the engine coolant temperature with a fan or means
other than ambient air. Doing so may produce an inaccurate
diagnostic result.

Start engine and let it idle monitoring “COOLAN TEMP/S”
value. When the “COOLAN TEMP/S” value reaches 70°C
(158°F), immediately go to the next step.

Select “EGR SYSTEM P0400” of “EGR SYSTEM” in “DTC
WORK SUPPORT” mode with CONSULT-II.

Touch “START”.

Accelerate vehicle to a speed of 40 km/h (25 MPH) once and
then stop vehicle with engine running.
If “COMPLETED” appears on CONSULT-II screen, go to step
10.
If “COMPLETED” does not appear on CONSULT-II screen, go
to the following step.

Check the output voltage of “THRTL POS SEN” (at closed
throttle position) and note it.

When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions
until “TESTING” changes to “COMPLETED”. (It will take
approximately 45 seconds or more.)

DTC P0400 EGR FUNCTION (CLOSED) (WHERE FITTED)

SR20DE

On Board Diagnosis Logic (Cont’d)

EC-836

ENG SPEED

1,600 - 3,500 rpm

Vehicle speed

10 km/h (6 MPH) or more

B/FUEL SCHDL

5.0 - 8.5 msec

THRTL POS SEN

(X + 0.05) − (X + 0.87)V
X = Voltage value measured at step 8

Selector lever

Suitable position

If “TESTING” is not displayed after 5 minutes, retry from
step 2.

10) Make sure that “OK” is displayed after touching “SELF-DIAG

RESULTS”.

“NG”

displayed,

refer

“Diagnostic

Procedure”, EC-839.

With GST

Turn ignition switch “ON”.

Check engine coolant temperature in MODE 1 with GST.

Engine coolant temperature: Less than 40°C (104°F)

Start engine and let it idle monitoring the value of “COOLAN
TEMP/S”. When the engine coolant temperature reaches 70°C
(158°F), immediately go to the next step.

SEF066X

Maintain the following conditions for at least 1 minute.

Engine speed

1,600 - 3,500 rpm

Vehicle speed

10 km/h (6 MPH) or more

Voltage between ECM terminal
92 and ground

0.86 - 2.0V

Selector lever

Suitable position

Stop vehicle.

Turn ignition switch “OFF” and wait at least 10 seconds, then
turn “ON”.

Repeat step 2 to 4.

Select “MODE 3” with GST.

If DTC is detected, go to “DIAGNOSTIC PROCEDURE”,
EC-839.

When using GST, “DTC CONFIRMATION PROCEDURE”
should be performed twice as much as when using CON-
SULT-II because GST cannot diaplay MODE 7 (1st trip
DTC) concerning this diagnosis. Therefore, using CON-
SULT-II is recommended.

DTC P0400 EGR FUNCTION (CLOSED) (WHERE FITTED)

SR20DE

DTC Confirmation Procedure (Cont’d)

EC-837

Wiring Diagram

NLEC1550

YEC700

DTC P0400 EGR FUNCTION (CLOSED) (WHERE FITTED)

SR20DE

Wiring Diagram

EC-838

Diagnostic Procedure

NLEC1551

CHECK EXHAUST SYSTEM

1. Start engine.
2. Check exhaust pipes and muffler for leaks.

SEF099P

OK or NG

OK (With CONSULT-II)

GO TO 2.

OK (Without CONSULT-
II)

GO TO 4.

Repair or replace exhaust system.

CHECK POWER SUPPLY

1. Disconnect EGR volume control valve harness connector.

SEF216X

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

SEF782Z

OK or NG

GO TO 4.

GO TO 3.

DTC P0400 EGR FUNCTION (CLOSED) (WHERE FITTED)

SR20DE

Diagnostic Procedure

EC-839

DETECT MALFUNCTIONING PART

Check the following.

15A fuse

Harness connectors E76, F36

ECM relay

Harness for open or short between EGR volume control valve and fuse

Repair harness or connectors or replace fuse or ECM relay.

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 5.

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

CHECK EGR PASSAGE

Check EGR passage for clogging and cracks.

OK or NG

GO TO 6.

Repair or replace EGR passage.

CHECK EGR TEMPERATURE SENSOR

Refer to “COMPONENT INSPECTION”, EC-920.

OK or NG

GO TO 7.

Replace EGR temperature sensor.

CHECK EGR VOLUME CONTROL VALVE

Refer to “COMPONENT INSPECTION”, EC-847.

OK or NG

GO TO 8.

Replace EGR volume control valve.

CHECK INTERMITTENT INCIDENT

Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-670.

INSPECTION END

DTC P0400 EGR FUNCTION (CLOSED) (WHERE FITTED)

SR20DE

Diagnostic Procedure (Cont’d)

EC-840

Content .. 77 78 79 80 ..