Nissan Almera Tino V10 (2001 year). Manual — part 87

MODELS WITH ECM IN CABIN

NLEC1794S04

YEC932

HEATED OXYGEN SENSOR 1 HEATER (FRONT)

SR20DE

Wiring Diagram (Cont’d)

EC-953

Diagnostic Procedure

NLEC1795

1

CHECK OVERALL FUNCTION

1. Turn ignition switch “ON”.
2. Set the tester probe between ECM terminals 4 [HO2S1 Heater (front) signal] and ground.
3. Start engine and let it idle.
4. Check the voltage under the following conditions.

SEF239Z

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 2.

2

CHECK POWER SUPPLY

1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 1 (front) harness connector.

SEF774Z

3. Turn ignition switch “ON”.
4. Check voltage between HO2S1 terminal 1 and ground with CONSULT-II or tester.

SEF934X

OK or NG

OK

©

GO TO 4.

NG

©

GO TO 3.

HEATED OXYGEN SENSOR 1 HEATER (FRONT)

SR20DE

Diagnostic Procedure

EC-954

3

DETECT MALFUNCTIONING PART

Check the following.

+

Harness connectors F38, M50 (where fitted)

+

Harness connectors M72, F44 (where fitted)

+

10A fuse

+

Harness for open or short between heated oxygen sensor 1 (front) and fuse

©

Repair harness or connectors.

4

CHECK GROUND CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between HO2S1 terminal 3 and ECM terminal 4.

Refer to wiring diagram.

Continuity should exist.

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 HEATED OXYGEN SENSOR 1 HEATER (FRONT)

Refer to “Component Inspection”, EC-955.

OK or NG

OK

©

GO TO 6.

NG

©

Replace heated oxygen sensor 1 (front).

6

CHECK INTERMITTENT INCIDENT

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

©

INSPECTION END

SEF935X

Component Inspection

NLEC1796

HEATED OXYGEN SENSOR 1 HEATER (FRONT)

NLEC1796S01

Check resistance between terminals 3 and 1.

Resistance: 2.3 - 4.3

Ω

at 25°C (77°F)

Check continuity between terminals 2 and 1, 3 and 2.

Continuity should not exist.

If NG, replace the heated oxygen sensor 1 (front).

CAUTION:

+

Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.

+

Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.

HEATED OXYGEN SENSOR 1 HEATER (FRONT)

SR20DE

Diagnostic Procedure (Cont’d)

EC-955

SEF327R

Component Description

NLEC1797

The heated oxygen sensor 2 (rear), after three way catalyst, moni-
tors the oxygen level in the exhaust gas.
Even if switching characteristics of the heated oxygen sensor 1
(front) are shifted, the air fuel ratio is controlled to stoichiometric,
by the signal from the heated oxygen sensor 2 (rear).
This sensor is made of ceramic zirconia. The zirconia generates
voltage from approximately 1V in richer conditions to 0V in leaner
conditions.
Under normal conditions the heated oxygen sensor 2 (rear) is not
used for engine control operation.

CONSULT-II Reference Value in Data Monitor
Mode

NLEC1798

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S2 (B1)

+

Engine: After warming up

Revving engine from idle to 3,000
rpm

0 - 0.3V

←→

Approx. 0.6 - 1.0V

HO2S2 MNTR
(B1)

LEAN

←→

RICH

ECM Terminals and Reference Value

NLEC1799

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)

63

L

Heated oxygen sensor 2
(rear)

[Engine is running]

+

After warming up to normal operating tempera-
ture and engine speed is 3,000 rpm

0 - Approximately 1.0V

HEATED OXYGEN SENSOR 2 (REAR)

SR20DE

Component Description

EC-956

Wiring Diagram

NLEC1800

MODELS WITH ECM IN ENGINE COMPARTMENT

NLEC1800S03

YEC746

HEATED OXYGEN SENSOR 2 (REAR)

SR20DE

Wiring Diagram

EC-957

MODELS WITH ECM IN CABIN

NLEC1800S04

YEC933

HEATED OXYGEN SENSOR 2 (REAR)

SR20DE

Wiring Diagram (Cont’d)

EC-958

Diagnostic Procedure

NLEC1801

1

CHECK OVERALL FUNCTION-I

1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set voltmeter probes between ECM terminals 63 [HO2S2 (B1) signal] and ground.
4. Check the voltage while revving up to 4,000 rpm under no load at least 10 times.

(Depress and release the accelerator pedal as quickly as possible.)

SEF240Z

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 2.

2

CHECK OVERALL FUNCTION-II

Keep engine at idle for 10 minutes, then check the voltage between ECM terminal 63 and ground, or check the voltage
when coasting at 80 km/h (50 MPH) in “D” position with “SPORTS MODE SW” OFF.

SEF240Z

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 3.

HEATED OXYGEN SENSOR 2 (REAR)

SR20DE

Diagnostic Procedure

EC-959

3

RETIGHTEN GROUND SCREWS

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

SEF202X

©

GO TO 4.

4

CHECK INPUT SIGNAL CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 (HO2S2) (rear) harness connector and ECM harness connector.

SEF639Z

3. Check harness continuity between ECM terminal 63 and HO2S2 terminal 1.

Refer to wiring diagram.

Continuity should exist.

4. Check harness continuity between ECM terminal 63 (or HO2S2 terminal 1) and ground.

Continuity should not exist.

5. 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 GROUND CIRCUIT

1. Check harness continuity between HO2S2 terminal 4 and body ground.

Refer to wiring diagram.

Continuity should exist.

2. Also check harness for short to power.

OK or NG

OK

©

GO TO 7.

NG

©

GO TO 6.

HEATED OXYGEN SENSOR 2 (REAR)

SR20DE

Diagnostic Procedure (Cont’d)

EC-960

6

DETECT MALFUNCTIONING PART

Check the following.

+

Joint connector-2 (where fitted)

+

Joint connector F46 (where fitted)

+

Harness for open or short between HO2S2 and ECM

©

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

7

CHECK HEATED OXYGEN SENSOR 2 (REAR)

Refer to “Component Inspection”, EC-961.

OK or NG

OK

©

GO TO 8.

NG

©

Replace heated oxygen sensor 2 (rear).

8

CHECK INTERMITTENT INCIDENT

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

©

INSPECTION END

SEF662Y

Component Inspection

NLEC1802

HEATED OXYGEN SENSOR 2 (REAR)

NLEC1802S01

With CONSULT-II

1)

Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.

2)

Stop vehicle with engine running.

3)

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and
select “HO2S2 (B1)” as the monitor item with CONSULT-II.

4)

Check “HO2S2 (B1)” at idle speed when adjusting “FUEL
INJECTION” to

±

25%.

“HO2S2 (B1)” should be above 0.68V at least once when
the “FUEL INJECTION” is +25%. “HO2S2 (B1)” should be
below 0.45V at least once when the “FUEL INJECTION” is
−25%.

CAUTION:

+

Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.

+

Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.

SEF244YC

HEATED OXYGEN SENSOR 2 (REAR)

SR20DE

Diagnostic Procedure (Cont’d)

EC-961

SEF032X

Without CONSULT-II

1)

Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.

2)

Stop vehicle with engine running.

3)

Set voltmeter probes between ECM terminals 63 (HO2S2 sig-
nal) and engine ground.

4)

Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.68V at least once.
If the voltage is above 0.68V at step 4, step 5 is not nec-
essary.

5)

Keep vehicle at idling for 10 minutes, then check the voltage.
Or check the voltage when coasting from 80 km/h (50 MPH)
in D position with “SPORTS MODE SW” OFF.
The voltage should be below 0.45V at least once.

CAUTION:

+

Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.

+

Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.

HEATED OXYGEN SENSOR 2 (REAR)

SR20DE

Component Inspection (Cont’d)

EC-962

Description

NLEC1803

SYSTEM DESCRIPTION

NLEC1803S01

Sensor

Input Signal to ECM

ECM function

Actuator

Camshaft position sensor

Engine speed

Heated oxygen sensor
2 heater (rear) control

Heated oxygen sensor 2 heater
(rear)

The ECM performs ON/OFF control of the heated oxygen sensor 2 heater (rear) corresponding to the engine
speed.

OPERATION

NLEC1803S02

Engine condition

Heated oxygen sensor 2 heater (rear)

Engine stopped

OFF

Engine is running.

Engine speed below 3,600 rpm
After driving for 2 minutes at a speed
of 70 km/h (43 MPH) or more

ON

Engine speed above 3,600 rpm

OFF

CONSULT-II Reference Value in Data Monitor
Mode

NLEC1804

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S2 HTR (B1)

+

Engine speed

Below 3,600 rpm [After driving for 2 minutes at a
speed of 70 km/h (43 MPH) or more]

ON

Above 3,600 rpm

OFF

+

Ignition switch ON (Engine stopped)

OFF

ECM Terminals and Reference Value

NLEC1805

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)

3

W/R

Heated oxygen sensor 2
heater (rear)

[Engine is running]

+

Engine speed is below 3,600 rpm [After driving
for 2 minutes at a speed of 70 km/h (43 MPH) or
more]

0 - 1V

[Engine is running]

+

Engine speed is above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch “ON”]

+

Engine stopped

HEATED OXYGEN SENSOR 2 HEATER (REAR)

SR20DE

Description

EC-963

Wiring Diagram

NLEC1806

MODELS WITH ECM IN ENGINE COMPARTMENT

NLEC1806S03

YEC747

HEATED OXYGEN SENSOR 2 HEATER (REAR)

SR20DE

Wiring Diagram

EC-964

MODELS WITH ECM IN CABIN

NLEC1806S04

YEC934

HEATED OXYGEN SENSOR 2 HEATER (REAR)

SR20DE

Wiring Diagram (Cont’d)

EC-965

Diagnostic Procedure

NLEC1807

1

CHECK OVERALL FUNCTION

Without CONSULT-II

1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set the voltmeter probe between ECM terminals 3 [HO2S2 HTR (B1) signal] and ground.
4. Check the voltage under the following conditions.

SEF241Z

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 2.

2

CHECK POWER SUPPLY

1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 (HO2S2) (rear) harness connector.

SEF639Z

3. Turn ignition switch “ON”.
4. Check voltage between HO2S2 terminal 2 and ground.

SEF218W

Voltage: Battery voltage

OK or NG

OK

©

GO TO 4.

NG

©

GO TO 3.

HEATED OXYGEN SENSOR 2 HEATER (REAR)

SR20DE

Diagnostic Procedure

EC-966

3

DETECT MALFUNCTIONING PART

Check the following.

+

Harness connectors F38, M50 (where fitted)

+

Harness connectors M72, F44 (where fitted)

+

10A fuse

+

Harness for open or short between heated oxygen sensor 2 (rear) and fuse

©

Repair harness or connectors.

4

CHECK OUTPUT CIRCUIT

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between HO2S2 terminal 3 and ECM terminal 3.

Refer to wiring diagram.

Continuity should exist.

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

OK or NG

OK

©

GO TO 6.

NG

©

GO TO 5.

5

DETECT MALFUNCTIONING PART

Check the harness for open or short between heated oxygen sensor 2 heater (rear) and ECM.

©

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

6

CHECK HEATED OXYGEN SENSOR 2 HEATER (REAR)

Refer to “Component Inspection”, EC-968.

OK or NG

OK

©

GO TO 7.

NG

©

Replace heated oxygen sensor 2 (rear).

7

CHECK INTERMITTENT INCIDENT

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

©

INSPECTION END

HEATED OXYGEN SENSOR 2 HEATER (REAR)

SR20DE

Diagnostic Procedure (Cont’d)

EC-967

SEF221W

Component Inspection

NLEC1808

HEATED OXYGEN SENSOR 2 HEATER (REAR)

NLEC1808S01

Check the following.
1.

Check resistance between terminals 2 and 3.

Resistance: 2.3 - 4.3

Ω

at 25°C (77°F)

2.

Check continuity.

Terminal No.

Continuity

1 and 2, 3, 4

No

4 and 1, 2, 3

If NG, replace the heated oxygen sensor 2 (rear).

CAUTION:

+

Discard any heated oxygen sensor which has been
dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.

+

Before installing new oxygen sensor, clean exhaust sys-
tem threads using Oxygen Sensor Thread Cleaner tool
and approved anti-seize lubricant.

HEATED OXYGEN SENSOR 2 HEATER (REAR)

SR20DE

Component Inspection

EC-968