Page 2129 of 5883
EC-780
< FUNCTION DIAGNOSIS >[MR18DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
5. Perform each diagnostic mode according to each service proce-
dure.
For further information, see the GST Operation Manual of
the tool maker.
SEF416S
Page 2130 of 5883
![NISSAN TIIDA 2007 Service Repair Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-781
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:00000000011 NISSAN TIIDA 2007 Service Repair Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-781
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:00000000011](/manual-img/5/57395/w960_57395-2129.png)
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-781
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
DescriptionINFOID:0000000001161755
The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-
TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”
of “DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the
value in “SPEC” of “DATA MONITOR” 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
MI.
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 correc-
tion)
A/F ALPHA-B1 (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)
Component Function CheckINFOID:0000000001161756
1.START
Make sure that all of the following conditions are satisfied.
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
2, 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
- After the engine is warmed up to normal operating temperature, drive vehicle for 5 minutes.
Electrical load: Not applied*
Engine speed: Idle
*: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
>> GO TO 2.
2.PERFORM “SPEC” OF “DATA MONITOR” MODE
With CONSULT-III
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform EC-689, "
BASIC INSPECTION : Special Repair Requirement".
2. Select “B/FUEL SCHDL”, “A/F ALPHA-B1” and “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode
with CONSULT-III.
3. Make sure that monitor items are within the SP value.
Is the inspection result normal?
YES >> END
NO >> Go to EC-782, "
Diagnosis Procedure".
Page 2131 of 5883
EC-782
< COMPONENT DIAGNOSIS >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Diagnosis Procedure
INFOID:0000000001161757
OVERALL SEQUENCE
PBIB2384E
Page 2132 of 5883
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-783
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
DETAILED PROCEDURE
1.CHECK “A/F ALPHA-B1”
With CONSULT-III
1. Start engine.
2. Confirm that the testing conditions are met. Refer to EC-781, "
Component Function Check".
3. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.
PBIB3213E
Page 2133 of 5883
![NISSAN TIIDA 2007 Service Repair Manual EC-784
< COMPONENT DIAGNOSIS >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
NOTE:
Check “A/F ALPHA-B1” for approximately 1 minute because they may fluctuate. It is NG if the indication is
out o NISSAN TIIDA 2007 Service Repair Manual EC-784
< COMPONENT DIAGNOSIS >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
NOTE:
Check “A/F ALPHA-B1” for approximately 1 minute because they may fluctuate. It is NG if the indication is
out o](/manual-img/5/57395/w960_57395-2132.png)
EC-784
< COMPONENT DIAGNOSIS >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
NOTE:
Check “A/F ALPHA-B1” for approximately 1 minute because they may fluctuate. It is NG if the indication is
out of the SP value even a little.
Is the measurement value within the SP value?
YES >> GO TO 17.
NO-1 >> Less than the SP value: GO TO 2.
NO-2 >> More than the SP value: GO TO 3.
2.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?
YES >> GO TO 4.
NO >> More than the SP value: GO TO 19.
3.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?
YES >> GO TO 6.
NO-1 >> More than the SP value: GO TO 6.
NO-2 >> Less than the SP value: GO TO 25.
4.CHECK “A/F ALPHA-B1”
1. Stop the engine.
2. Disconnect PCV hose, and then plug it.
3. Start engine.
4. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> GO TO 5.
NO >> GO TO 6.
5.CHANGE ENGINE OIL
1. Stop the engine.
2. Change engine oil.
NOTE:
This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving
conditions (such as when engine oil temperature does not rise enough since a journey distance is too
short during winter). The symptom will not be detected after changing engine oil or changing driving con-
dition.
>>INSPECTION END
6.CHECK FUEL PRESSURE
Check fuel pressure. (Refer to EC-1035, "
Inspection".)
Is the inspection result normal?
YES >> GO TO 9.
NO-1 >> Fuel pressure is too high: Replace “fuel filter and fuel pump assembly” and then GO TO 8.
NO-2 >> Fuel pressure is too low: GO TO 7.
7.DETECT MALFUNCTIONING PART
Check fuel hoses and fuel tubes for clogging
Is the inspection result normal?
YES >> Replace “fuel filter and fuel pump assembly” and then GO TO 8.
NO >> Repair or replace and then GO TO 8.
8.CHECK “A/F ALPHA-B1”
Page 2134 of 5883
![NISSAN TIIDA 2007 Service Repair Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-785
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, a NISSAN TIIDA 2007 Service Repair Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-785
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, a](/manual-img/5/57395/w960_57395-2133.png)
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-785
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> GO TO 9.
9.PERFORM POWER BALANCE TEST
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2. Make sure that the each cylinder produces a momentary engine speed drop.
Is the inspection result normal?
YES >> GO TO 12.
NO >> GO TO 10.
10.DETECT MALFUNCTIONING PART
Check the following.
1. Ignition coil and its circuit (Refer to EC-981, "
Component Function Check".)
2. Fuel injector and its circuit (Refer to EC-975, "
Component Function Check".)
3. Intake air leakage
4. Low compression pressure (Refer to EM-151, "
Checking Compression Pressure".)
Is the inspection result normal?
YES >> Replace fuel injector and then GO TO 11.
NO >> Repair or replace malfunctioning part and then GO TO 11.
11 .CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> GO TO 12.
12.CHECK HEATED OXYGEN SENSOR 1 FUNCTION
1. Run engine at about 2,000 rpm for about 2minutes under no load.
2. Select “HO2S MNTR (B1)”, in “DATA MONITOR” mode.
3. Running engine at 2,000 rpm under no load (The engine is warmed up to normal operating temperature.),
check that the monitor fluctuates between LEAN and RICH more than 5 times during 10 seconds.
Is the inspection result more than 5 times during 10 seconds?
YES >> GO TO 15.
NO >> GO TO 13.
13.CHECK HEATED OXYGEN SENSOR 1 CIRCUIT
Check heated oxygen sensor 1 and its circuit, refer to.
>> GO TO 14.
14.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> GO TO 15.1 time : RICH → LEAN → RICH
2 times : RICH → LEAN → RICH → LEAN → RICH
Page 2135 of 5883
![NISSAN TIIDA 2007 Service Repair Manual EC-786
< COMPONENT DIAGNOSIS >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
15.DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect ECM harness connector. Check pin term NISSAN TIIDA 2007 Service Repair Manual EC-786
< COMPONENT DIAGNOSIS >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
15.DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect ECM harness connector. Check pin term](/manual-img/5/57395/w960_57395-2134.png)
EC-786
< COMPONENT DIAGNOSIS >[MR18DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
15.DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect ECM harness connector. Check pin terminal and connector for damage, and then reconnect it.
>> GO TO 16.
16.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Detect malfunctioning part according to EC-1024, "
Symptom Table".
17.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO-1 >> More than the SP value: GO TO 18.
NO-2 >> Less than the SP value: GO TO 25.
18.DETECT MALFUNCTIONING PART
1. Check for the cause of large engine friction. Refer to the following.
- Engine oil level is too high
- Engine oil viscosity
- Belt tension of alternator, A/C compressor, etc. is excessive
- Noise from engine
- Noise from transmission, etc.
2. Check for the cause of insufficient combustion. Refer to the following.
- Valve clearance malfunction
- Intake valve timing control function malfunction
- Camshaft sprocket installation malfunction, etc.
>> Repair or replace malfunctioning part, and then GO TO 30.
19.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system
Is the inspection result normal?
YES >> GO TO 21.
NO >> Repair or replace malfunctioning part, and then GO TO 20.
20.CHECK “A/F ALPHA-B1”, AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1” and “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the
each indication is within the SP value.
Is the measurement value within the SP value?
YES >>INSPECTION END
NO >> “B/FUEL SCHDL” is more, “A/F ALPHA-B1” is less than the SP value: GO TO 21.
21.DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and
then reconnect it again.
Page 2136 of 5883
![NISSAN TIIDA 2007 Service Repair Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-787
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
>> GO TO 22.
22.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in NISSAN TIIDA 2007 Service Repair Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-787
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
>> GO TO 22.
22.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in](/manual-img/5/57395/w960_57395-2135.png)
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-787
< COMPONENT DIAGNOSIS >[MR18DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
>> GO TO 22.
22.CHECK “A/F ALPHA-B1”
1. Start engine.
2. Select “A/F ALPHA-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to EC-799, "DTC
Logic". Then GO TO 29.
NO >> GO TO 23.
23.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?
YES >> GO TO 24.
NO >> More than the SP value: Replace mass air flow sensor, and then GO TO 29.
24.REPLACE ECM
1. Replace ECM.
2. Go to EC-692, "
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
ment".
>> GO TO 29.
25.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
Crushed air ducts
Malfunctioning seal of air cleaner element
Uneven dirt of air cleaner element
Improper specification of intake air system
Is the inspection result normal?
YES >> GO TO 27.
NO >> Repair or replace malfunctioning part, and then GO TO 26.
26.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Less than the SP value: GO TO 27.
27.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and make sure that the indication is within the
SP value.
Is the measurement value within the SP value?
YES >> GO TO 28.
NO >> Less than the SP value: Replace mass air flow sensor, and then GO TO 30.
28.CHECK INTAKE SYSTEM
Check for the cause of air leak after the mass air flow sensor. Refer to the following.
Disconnection, looseness, and cracks in air duct
Looseness of oil filler cap
Disconnection of oil level gauge
Open stuck, breakage, hose disconnection, or cracks of PCV valve
Disconnection or cracks of EVAP purge hose, open stuck of EVAP canister purge volume control solenoid
valve