Content .. 79 80 81 82 ..

Nissan Almera Tino V10 (2001 year). Manual - part 81

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors F60, F13

Harness for open or short between EVAP canister purge volume control solenoid valve and ECM.

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

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to “Component Inspection” EC-857.

OK or NG

GO TO 6.

Replace EVAP canister purge volume control solenoid valve.

CHECK INTERMITTENT INCIDENT

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

INSPECTION END

SEF801Y

SEF079X

Component Inspection

NLEC1572

EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE

NLEC1572S01

With CONSULT-II

Start engine.

Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.
If OK, inspection end. If NG, go to following step.

Check air passage continuity.

Condition

PURG VOL CONT/V value

Air passage continuity

between A and B

100.0%

Yes

0.0%

If NG or operation takes more than 1 second, replace the
EVAP canister purge volume control solenoid valve.

Without CONSULT-II

Check air passage continuity.

Condition

Air passage continuity

between A and B

12V direct current supply between ter-
minals

Yes

No supply

If NG or operation takes more than 1 second, replace the EVAP
canister purge volume control solenoid valve.

DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

(CIRCUIT)

SR20DE

Diagnostic Procedure (Cont’d)

EC-857

SEF080X

Component Description

NLEC1573

The vehicle speed sensor is installed in the transaxle. It contains a
pulse generator which provides a vehicle speed signal to the
speedometer. The speedometer then sends a signal to the ECM.

ECM Terminals and Reference Value

NLEC1574

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.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

OR/W

Vehicle speed sensor

[Engine is running]

Lift up the vehicle

In 2nd gear position

Vehicle speed is 40 km/h (25 MPH)

0 - Approximately 5V

SEF976W

On Board Diagnosis Logic

NLEC1575

DTC No.

Malfunction is detected when ...

Check Items (Possible Cause)

P0500
0500

The almost 0 km/h (0 MPH) signal from vehicle speed
sensor is sent to ECM even when vehicle is being
driven.

Harness or connector
(The vehicle speed sensor circuit is open or
shorted.)

Vehicle speed sensor

DTC Confirmation Procedure

NLEC1576

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 10 seconds
before conducting the next test.
TESTING CONDITION:
This procedure may be conducted with the drive wheels 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.

DTC P0500 VEHICLE SPEED SENSOR (VSS)

SR20DE

Component Description

EC-858

SEF196Y

With CONSULT-II

Start engine

Read “VHCL SPEED SE” in “DATA MONITOR” mode with
CONSULT-II. The vehicle speed on CONSULT-II should
exceed 10 km/h (6 MPH) when rotating wheels with suitable
gear position.

If NG, go to “Diagnostic Procedure”, EC-862.
If OK, go to following step.

Select “DATA MONITOR” mode with CONSULT-II.

Warm engine up to normal operating temperature.

Maintain the following conditions for at least 10 consecutive
seconds.

ENG SPEED

1,600 - 3,100 rpm

COOLAN TEMP/S

More than 70°C (158°F)

B/FUEL SCHDL

5.0 - 11.8 msec

Selector lever

Suitable position

PW/ST SIGNAL

OFF

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-862.

With GST

Lift up drive wheels.

Start engine.

Read vehicle speed sensor signal in “MODE 1” with GST.
The vehicle speed sensor on GST should be able to exceed
10 km/h (6 MPH) when rotating wheels with suitable gear posi-
tion.

If NG, go to “Diagnostic Procedure”, EC-862.

SEF607Y

No Tools

Lift up drive wheels.

Start engine.

Read the voltage signal between ECM terminal 86 (Vehicle
speed sensor signal) and ground with oscilloscope.

Verify that the oscilloscope screen shows the signal wave as
shown at “ECM terminals and Reference Value”, EC-858.

If NG, go to “Diagnostic Procedure”, EC-862.

DTC P0500 VEHICLE SPEED SENSOR (VSS)

SR20DE

DTC Confirmation Procedure (Cont’d)

EC-859

Wiring Diagram

NLEC1577

MODELS WITH ECM IN ENGINE COMPARTMENT

NLEC1577S03

YEC703

DTC P0500 VEHICLE SPEED SENSOR (VSS)

SR20DE

Wiring Diagram

EC-860

MODELS WITH ECM IN CABIN

NLEC1577S04

YEC924

DTC P0500 VEHICLE SPEED SENSOR (VSS)

SR20DE

Wiring Diagram (Cont’d)

EC-861

Diagnostic Procedure

NLEC1578

1 CHECK INPUT SIGNAL CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector and combination meter harness connector.
3. Check harness continuity between ECM terminal 86 and combination meter terminal 17.

Refer to wiring diagram.

Continuity should exist.

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

OK or NG

GO TO 3.

GO TO 2.

2 DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M50, F38 (where fitted)

Harness connectors M71, F45 (where fitted)

Harness for open or short between ECM and combination meter

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

3 CHECK SPEEDOMETER FUNCTION

Make sure that speedometer functions properly.

OK or NG

GO TO 5.

GO TO 4.

4 CHECK SPEEDOMETER CIRCUIT

Check the following.

Harness connectors M50, F38 (where fitted)

Harness connectors M49, F43 (where fitted)

Harness connectors M71, F44 (where fitted)

Harness connectors M72, F45 (where fitted)

Harness for open or short between combination meter and vehicle speed sensor

Check combination meter and vehicle speed sensor. Refer to EL-130, “METERS AND
GAUGES”.

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

5 CHECK INTERMITTENT INCIDENT

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

INSPECTION END

DTC P0500 VEHICLE SPEED SENSOR (VSS)

SR20DE

Diagnostic Procedure

EC-862

Description

NLEC1768

SYSTEM DESCRIPTION

NLEC1768S01

Sensor

Input Signal to ECM

ECM func-

tion

Actuator

Camshaft position sensor

Engine speed

Idle air
control

IACV-AAC 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

Park/neutral position (PNP) switch

Park/neutral position

Air conditioner switch

Air conditioner operation

Power steering oil pressure switch

Power steering load signal

Battery

Battery voltage

Vehicle speed sensor

Vehicle speed

Intake air temperature sensor

Intake air temperature

Cooling fan

Cooling fan operation

Electrical load

Electrical load signal

This system automatically controls engine idle speed to a specified
level. Idle speed is controlled through fine adjustment of the
amount of air which by-passes the throttle valve via IACV-AAC
valve. The IACV-AAC valve changes the opening of the air by-pass
passage to control the amount of auxiliary air. This valve is actu-
ated by a step motor built into the valve, which moves the valve in
the axial direction in steps corresponding to the ECM output sig-
nals. One step of IACV-AAC valve movement causes the respec-
tive opening of the air by-pass passage. (i.e. when the step
advances, the opening is enlarged.) The opening of the valve is
varied to allow for optimum control of the engine idling speed. The
camshaft position sensor detects the actual engine speed and
sends a signal to the ECM. The ECM then controls the step posi-
tion of the IACV-AAC valve so that engine speed coincides with the
target value memorized in ECM. The target engine speed is the
lowest speed at which the engine can operate steadily. The opti-
mum value stored in the ECM is determined by takig into consid-
eration various engine conditions, such as during warm up,
deceleration, and engine load (air conditioner, power steering and
cooling fan operation).

SEF937W

COMPONENT DESCRIPTION

NLEC1768S02

IACV-AAC Valve

NLEC1768S0201

The IACV-AAC valve is operated by a step motor for centralized
control of auxiliary air supply. This motor has four winding phases
and is actuated by the output signals of ECM which turns ON and
OFF two windings each in sequence. Each time the IACV-AAC
valve opens or closes to change the auxiliary air quantity, the ECM
sends a pulse signal to the step motor. When no change in the
auxiliary air quantity 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.

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Description

EC-863

CONSULT-II Reference Value in Data Monitor
Mode

NLEC1580

MONITOR ITEM

CONDITION

SPECIFICATION

IACV-AAC/V

Engine: After warming up

Air conditioner switch: OFF

Shift lever: “N”

No-load

Idle

5 - 20 steps

2,000 rpm

—

ECM Terminals and Reference Value

NLEC1581

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.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

6
7
15
16

BR
LG
GY/L
OR

IACV-AAC valve

[Engine is running]

Warm-up condition

Idle speed

0.1 - 14V

On Board Diagnosis Logic

NLEC1582

DTC No.

Malfunction is detected when ...

Check Items (Possible Cause)

P0505

An improper voltage signal is sent to ECM through the
valve.

Harness or connectors
(The IACV-AAC valve circuit is open.)

IACV-AAC valve

SEF058Y

DTC Confirmation Procedure

NLEC1583

NOTE:

“DTC

Confirmation

Procedure”

has

been

previously

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

If the target idle speed is out of the specified value, per-
form “Idle Air Volume Learning”, EC-581, before conduct-
ing “DTC Confirmation Procedure”. For the target idle
speed, refer to “Service Data and Specifications (SDS)”,
EC-1062.

With CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and warm it up to normal operating temperature.

Rev engine from idle to 2,000 rpm 20 times.
If

1st

trip

DTC

detected,

“DIAGNOSTIC

PROCEDURE”, EC-867.

With GST

Follow the procedure “With CONSULT-II” above.

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

CONSULT-II Reference Value in Data Monitor Mode

EC-864

Wiring Diagram

NLEC1584

MODELS WITH ECM IN ENGINE COMPARTMENT

NLEC1584S01

YEC704

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Wiring Diagram

EC-865

MODELS WITH ECM IN CABIN

NLEC1584S02

YEC925

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Wiring Diagram (Cont’d)

EC-866

Diagnostic Procedure

NLEC1585

CHECK POWER SUPPLY

1. Turn ignition switch “OFF”.
2. Disconnect IACV-AAC valve harness connector.

SEF221X

3. Turn ignition switch “ON”.
4. Check voltage between terminal 2, 5 and ground with CONSULT-II or tester.

SEF343X

OK or NG

GO TO 3.

GO TO 2.

DETECT MALFUNCTIONING PART

Check the following.

15A fuse

Harness connectors E76, F36

ECM relay

Harness for open or short between IACV-AAC and fuse

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 6 and IACV-AAC valve terminal 1,
ECM terminal 7 and IACV-AAC valve terminal 4,
ECM terminal 15 and IACV-AAC valve terminal 3,
ECM terminal 16 and IACV-AAC 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 or short to ground or short to power in harness or connectors.

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Diagnostic Procedure

EC-867

CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-I

1. Reconnect the ECM harness connector and IACV-AAC valve harness connector.
2. Disconnect the vacuum hose connected to the air control valve (Power steering) at intake air duct.
3. Start engine and let it idle.
4. Check vacuum hose for vacuum existence.

SEF778Z

Vacuum does not exist or slightly exist.

OK or NG

GO TO 5.

Replace air control valve (Power steering).

CHECK AIR CONTROL VALVE (POWER STEERING) OPERATION-II

Check the vacuum hose for vacuum existence when steering wheel is turned.

SEF778Z

Vacuum should exist.

OK or NG

GO TO 8.

GO TO 6.

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Diagnostic Procedure (Cont’d)

EC-868

CHECK VACUUM PORT

1. Stop engine.
2. Disconnect the vacuum hose connected to the air control valve (Power steering) at the vacuum port.
3. Blow air into vacuum port.
4. Check that air flows freely.

SEF779Z

OK or NG

GO TO 7.

Repair or clean vacuum port.

CHECK VACUUM HOSES AND TUBES

1. Disconnect vacuum hoses between the air control valve (Power steering) and vacuum port, air control valve (Power

steering) and air duct.

2. Check hoses and tubes for cracks, clogging, improper connection or disconnection.

SEF109L

OK or NG

GO TO 8.

Repair hoses or tubes.

CHECK IACV-AAC VALVE

Refer to “Component Inspection”, EC-871.

OK or NG

GO TO 10.

GO TO 9.

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Diagnostic Procedure (Cont’d)

EC-869

REPLACE IACV-AAC VALVE

1. Replace IACV-AAC valve assembly.
2. Perform “Idle Air Volume Learning”, EC-581.

Is the result CMPLT or INCMP?

CMPLT or INCMP

CMPLT

INSPECTION END

INCMP

Follow the construction of “Idle Air Volume Learning”.

CHECK TARGET IDLE SPEED

1. Turn ignition switch “OFF”.
2. Reconnect all harness connectors and vacuum hoses.
3. Start engine and warm it up to normal operating temperature.
4. Also warm up transmission to normal operating temperature.

For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “CVT” system indi-
cates less than 0.9V.

For models without CONSULT-II, drive vehicle for 10 minutes.

5. Stop vehicle with engine running.
6. Check target idle speed.

750

50 rpm

OK or NG

GO TO 11.

Perform “Idle Air Volume Learning”, EC-581.

CHECK INTERMITTENT INCIDENT

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

INSPECTION END

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Diagnostic Procedure (Cont’d)

EC-870

SEF605Y

SEF089X

Component Inspection

NLEC1586

IACV-AAC VALVE

NLEC1586S01

Disconnect IACV-AAC valve harness connector.

Check IACV-AAC valve resistance.

Condition

Resistance

Terminal 2 and terminals 1, 3

20 - 24

Ω

[at 20°C (68°F)]

Terminal 5 and terminals 4, 6

Reconnect IACV-AAC valve harness connector.

Remove idle air adjusting unit assembly (IACV-AAC valve is
built-in) from throttle body.
(The IACV-AAC valve harness connector should remain con-
nected.)

Turn ignition switch “ON” and “OFF”, and ensure the IACV-
AAC valve shaft smoothly moves forward and backward,
according to the ignition switch position.
If NG, replace the IACV-AAC valve.

DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL

(AAC) VALVE

SR20DE

Component Inspection

EC-871

SEF505V

Component Description

NLEC1587

A closed throttle position switch and wide open throttle position
switch are built into the throttle position sensor unit. The wide open
throttle position switch is used only for A/T control.
When the throttle valve is in the closed position, the closed throttle
position switch sends a voltage signal to the ECM. The ECM only
uses this signal to open or close the EVAP canister purge control
valve when the throttle position sensor is malfunctioning.

CONSULT-II Reference Value in Data Monitor
Mode

NLEC1588

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

CLSD THL/P SW

Engine: Idle

Throttle valve: Idle position

Throttle valve: Slightly open

OFF

ECM Terminals and Reference Value

NLEC1589

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.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Y/PU

Throttle position switch
(Closed position)

[Engine is running]

Accelerator pedal released

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch “ON”]

Accelerator pedal depressed

Approximately 0V

On Board Diagnosis Logic

NLEC1590

DTC No.

Malfunction is detected when ...

Check Items (Possible Cause)

P0510
0510

Battery voltage from the closed throttle position switch is
sent to ECM with the throttle valve opened.

Harness or connectors
(The closed throttle position switch circuit is
shorted.)

Closed throttle position switch

Throttle position sensor

SEF197Y

DTC Confirmation Procedure

NLEC1591

CAUTION:

With CONSULT-II

Start engine and warm it up to normal operating temperature.

Turn ignition switch “OFF”, wait at least 10 seconds and then
start engine.

DTC P0510 CLOSED THROTTLE POSITION SWITCH

SR20DE

Component Description

EC-872

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