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Nissan Almera Tino V10 (2001 year). Manual - part 69

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

101
103
105
107

R/B
Y/B
G/B
L/B

Injector No. 1
Injector No. 2
Injector No. 3
Injector No. 4

[Engine is running]

Warm-up condition

Idle speed

BATTERY VOLTAGE
(11 - 14V)

SEF011W

[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm

BATTERY VOLTAGE
(11 - 14V)

SEF012W

106
108

B/Y
B/Y

ECM ground

[Engine is running]

Idle speed

Engine ground

110
112

W
W

Power supply for ECM

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

111

Sensors’ power supply

[Ignition switch “ON”]

Approximately 5V

114

G/W

Data link connector

[Engine is running]

Idle speed (CONSULT-II or GST is discon-
nected)

115

Data link connector

[Engine is running]

Idle speed (CONSULT-II or GST is discon-
nected)

0 - 10V

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

SR20DE

ECM Terminals and Reference Value (Cont’d)

EC-665

Description

NLEC1748

The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:

B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)

A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing Condition

NLEC1749

Vehicle driven distance: More than 5,000 km (3,107 miles)

Barometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm

, 14.25 - 15.12 psi)

Atmospheric temperature: 20 - 30°C (68 - 86°F)

Engine coolant temperature: 75 - 95°C (167 - 203°F)

Transmission: Warmed-up*1

Electrical load: Not applied*2

Engine speed: Idle

*1: For after the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE”
(CVT fluid temperature sensor signal) indicates less than 0.9V.
*2: Rear window defogger switch, air conditioner switch, lighting switch are “OFF”. Cooling fans are not oper-
ating. Steering wheel is straight ahead.

SEF601Z

Inspection Procedure

NLEC1750

NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale dis-
play.
1.

Perform “Basic Inspection”, EC-623.

Confirm that the testing conditions indicated above are met.

Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F
SE-B1” in “DATA MONITOR (SPEC)” mode with CONSULT-II.

Make sure that monitor items are within the SP value.

If NG, go to “Diagnostic Procedure”, EC-667.

TROUBLE DIAGNOSIS — SPECIFICATION VALUE

SR20DE

Description

EC-666

Diagnostic Procedure

NLEC1751

SEF613ZA

TROUBLE DIAGNOSIS — SPECIFICATION VALUE

SR20DE

Diagnostic Procedure

EC-667

SEF768Z

TROUBLE DIAGNOSIS — SPECIFICATION VALUE

SR20DE

Diagnostic Procedure (Cont’d)

EC-668

SEF615Z

TROUBLE DIAGNOSIS — SPECIFICATION VALUE

SR20DE

Diagnostic Procedure (Cont’d)

EC-669

Description

NLEC1376

Intermittent incidents (I/I) may occur. In many cases, the problem resolves itself (the part or circuit function
returns to normal without intervention). It is important to realize that the symptoms described in the custom-
er’s complaint often do not recur on DTC (1st trip) visits. Realize also that the most frequent cause of I/I
occurrences is poor electrical connections. Because of this, the conditions under which the incident occurred
may not be clear. Therefore, circuit checks made as part of the standard diagnostic procedure may not indi-
cate the specific problem area.

COMMON I/I REPORT SITUATIONS

NLEC1376S01

STEP in Work Flow

Situation

The CONSULT-II is used. The SELF-DIAG RESULTS screen shows time data other than “0” or
“1t”.

III

The symptom described by the customer does not recur.

(1st trip) DTC data does not appear during the DTC Confirmation Procedure.

The Diagnostic Procedure for PXXXX does not indicate the problem area.

Diagnostic Procedure

NLEC1377

INSPECTION START

Erase (1st trip) DTCs. Refer to “How to Erase Emission-related Diagnostic Information”, EC-594, EC-596.

GO TO 2.

CHECK GROUND TERMINALS

Check ground terminals for corroding or loose connection. Refer to GI-27, “GROUND INSPECTION”.

OK or NG

GO TO 3.

Repair or replace.

SEARCH FOR ELECTRICAL INCIDENT

Perform GI-22, “Incident Simulation Tests”.

OK or NG

INSPECTION END

Repair or replace.

TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT

SR20DE

Description

EC-670

Main Power Supply and Ground Circuit

WIRING DIAGRAM (MODELS WITH ECM IN ENGINE
COMPARTMENT)

NLEC1378

YEC686

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit

EC-671

WIRING DIAGRAM (MODELS WITH ECM IN CABIN)

NLEC1931

YEC911

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit (Cont’d)

EC-672

ECM TERMINALS AND REFERENCE VALUE

NLEC1379

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)

W/G

ECM relay (Self shut-off)

[Engine is running]
[Ignition switch “OFF”]

For a few seconds after turning ignition switch
“OFF”

0 - 1V

[Ignition switch “OFF”]

A few seconds passed after turning ignition
switch “OFF”

BATTERY VOLTAGE
(11 - 14V)

B/R

Ignition switch

[Ignition switch “OFF”]

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

ECM ground

[Engine is running]

Idle speed

Engine ground

ECM ground

[Engine is running]

Idle speed

Engine ground

W/L

Power supply for ECM
(Back-up)

[Ignition switch “OFF”]

BATTERY VOLTAGE
(11 - 14V)

106
108

B/Y
B/Y

ECM ground

[Engine is running]

Idle speed

Engine ground

110
112

W
W

Power supply for ECM

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

DIAGNOSTIC PROCEDURE

NLEC1380

INSPECTION START

Start engine.
Is engine running?

Yes or No

Yes

GO TO 9.

GO TO 2.

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit (Cont’d)

EC-673

CHECK ECM POWER SUPPLY CIRCUIT-I

1. Turn ignition switch “OFF” and then “ON”.
2. Check voltage between ECM terminal 43 and ground with CONSULT-II or tester.

SEF291X

OK or NG

GO TO 4.

GO TO 3.

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M50, F38 (where fitted)

Harness connectors M72, F44 (where fitted)

Fuse block (J/B) connector M1, E108 (where fitted)

10A fuse

Harness for open or short between ECM and ignition switch

Repair harness or connectors.

CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.

Refer to WIRING DIAGRAM.

Continuity should exist.

4. Also check harness for short to power.

OK or NG

GO TO 6.

GO TO 5.

DETECT MALFUNCTIONING PART

Check the following.

Joint connector-2 (where fitted)

Joint connector F46 (where fitted)

Harness for open between ECM and engine ground

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

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit (Cont’d)

EC-674

CHECK POWER SUPPLY-II

1. Disconnect ECM relay.

(For ECM relay location, refer to “Engine Control Component Parts Location”.)

2. Check voltage between ECM relay terminals 1, 6 and ground with CONSULT-II or tester.

SEF101Y

OK or NG

GO TO 8.

GO TO 7.

DETECT MALFUNCTIONING PART

Check the following.

15A fuse and 10A fuse

Harness connectors E76, F36 (where fitted)

Harness for open or short between ECM relay and battery

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

CHECK OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal 31 and ECM relay terminal 2.

Continuity should exist.

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

OK or NG

OK (Models with Euro-
OBD system)

Go to “IGNITION SIGNAL”, EC-1004.

OK (Models without
Euro-OBD system)

Go to “DTC P1320 IGNITION SIGNAL”, EC-900.

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

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit (Cont’d)

EC-675

CHECK ECM POWER SUPPLY CIRCUIT-II

1. Stop engine.
2. Check voltage between ECM terminal 67 and ground with CONSULT-II or tester.

SEF293X

OK or NG

GO TO 11.

GO TO 10.

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors E76, F36 (where fitted)

Harness connectors M11, E106 (LHD models) (where fitted)

Harness connectors M78, E120 (RHD models) (where fitted)

Harness connectors M72, F44 (where fitted)

Harness for open or short between ECM and fuse

Repair harness or connectors.

CHECK ECM POWER SUPPLY CIRCUIT-III

1. Turn ignition switch “ON” and then “OFF”.
2. Check voltage between ECM terminals 110, 112 and ground with CONSULT-II or tester.

SEF294X

OK or NG

GO TO 17.

NG (Battery voltage
does not exist.)

GO TO 12.

NG (Battery voltage
exists for more than a
few seconds.)

GO TO 14.

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit (Cont’d)

EC-676

CHECK ECM POWER SUPPLY CIRCUIT-IV

1. Disconnect ECM relay.

(For ECM relay location, refer to “Engine Control Component Parts Location”.)

2. Check voltage between ECM relay terminal 3 and ground with CONSULT-II or tester.

SEF295X

OK or NG

GO TO 14.

GO TO 13.

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors E76, F36 (where fitted)

Harness for open or short between ECM relay and 10A fuse

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

CHECK HARNESS CONTINUITY BETWEEN ECM RELAY AND ECM FOR OPEN AND SHORT

1. Check harness continuity between ECM terminals 110, 112 and ECM relay terminal 5.

Refer to WIRING DIAGRAM.

Continuity should exist.

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

OK or NG

GO TO 16.

GO TO 15.

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 ECM and ECM relay

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

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit (Cont’d)

EC-677

CHECK ECM RELAY

1. Apply 12V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.

SEF296X

OK or NG

GO TO 17.

Replace ECM relay.

CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II

1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals 48, 57, 106, 108 and engine ground.

Refer to WIRING DIAGRAM.

Continuity should exist.

4. Also check harness for short to power.

OK or NG

GO TO 19.

GO TO 18.

DETECT MALFUNCTIONING PART

Check the following.

Joint connector-2 (where fitted)

Joint connector F46 (where fitted)

Harness for open between ECM and engine ground

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

CHECK INTERMITTENT INCIDENT

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

INSPECTION END

TROUBLE DIAGNOSIS FOR POWER SUPPLY

SR20DE

Main Power Supply and Ground Circuit (Cont’d)

EC-678

SEF987W

Component Description

NLEC1381

The mass air flow sensor is placed in the stream of intake air. It
measures the intake flow rate by measuring a part of the entire
intake flow. It consists of a hot wire that is supplied with electric
current from the ECM. The temperature of the hot wire is controlled
by the ECM a certain amount. The heat generated by the hot wire
is reduced as the intake air flows around it. The more air, the
greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot wire as air flow increases. The ECM
detects the air flow by means of this current change.

CONSULT-II Reference Value in Data Monitor
Mode

NLEC1382

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

MAS A/F SE-B1

Engine: After warming up

Air conditioner switch: “OFF”

Shift lever: “N”

No-load

Idle

1.0 - 1.7V

2,500 rpm

1.5 - 2.1V

MASS AIRFLOW

Engine: After warming up

Air conditioner switch: “OFF”

Shift lever: “N”

No-load

Idle

2.5 - 5.0 g·m/s

2,500 rpm

7.1 - 12.5 g·m/s

ECM Terminals and Reference Value

NLEC1383

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)

Mass air flow sensor

[Engine is running]

Warm-up condition

Idle speed

1.3 - 1.7V

[Engine is running]

Warm-up condition

Engine speed is 2,500 rpm

1.8 - 2.4V

Mass air flow sensor
ground

[Engine is running]

Warm-up condition

Idle speed

Approximately 0V

On Board Diagnosis Logic

NLEC1384

DTC No.

Malfunction is detected when ...

Check Items (Possible Cause)

P0100
0100

An excessively high voltage from the sensor is sent
to ECM when engine is not running.

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

Mass air flow sensor

An excessively low voltage from the sensor is sent
to ECM* when engine is running.

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

Intake air leaks

Mass air flow sensor

*: When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.

DTC P0100 MASS AIR FLOW SENSOR (MAFS)

SR20DE

Component Description

EC-679

Fail-safe Mode

NLEC1385

Detected items

Engine operating condition in fail-safe mode

Mass air flow sensor circuit

Engine speed will not rise more than 2,400 rpm due to the fuel
cut.

DTC Confirmation Procedure

NLEC1386

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.

SEF058Y

PROCEDURE FOR MALFUNCTION A

NLEC1386S01

With CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Wait at least 2 seconds.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-684.

With GST
Follow the procedure “With CONSULT-II” above.

No Tools

Turn ignition switch “ON”, and wait at least 2 seconds.

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-684.

SEF058Y

PROCEDURE FOR MALFUNCTION B

NLEC1386S02

With CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and wait 2 seconds at most.

If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-684.

With GST

Follow the procedure “With CONSULT-II” above.

No Tools

Start engine and wait 2 seconds at most.

DTC P0100 MASS AIR FLOW SENSOR (MAFS)

SR20DE

Fail-safe Mode

EC-680

Content .. 67 68 69 70 ..