Nissan Qashqai (2007-2010). Manual — part 384
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-1055
< FUNCTION DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
C
D
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EC
N
P
O
AIR COND SIG
ON/OFF
• Indicates [ON/OFF] condition of the air condition-
er switch as determined by the air conditioner sig-
nal.
P/N POSI SW
ON/OFF
• Indicates [ON/OFF] condition from the park/neu-
tral position (PNP) switch signal.
PW/ST SIGNAL
ON/OFF
• [ON/OFF] condition of the power steering system
(determined by the signal voltage of the power
steering pressure sensor) is indicated.
LOAD SIGNAL
ON/OFF
• Indicates [ON/OFF] condition from the electrical
load signal.
ON: Rear window defogger switch is ON and/or
lighting switch is in 2nd position.
OFF: Both rear window defogger switch and light-
ing switch are OFF.
IGNITION SW
ON/OFF
• Indicates [ON/OFF] condition from ignition switch
signal.
HEATER FAN SW
ON/OFF
• Indicates [ON/OFF] condition from the heater fan
switch signal.
BRAKE SW
ON/OFF
• Indicates [ON/OFF] condition from the stop lamp
switch signal.
INJ PULSE-B1
msec
• Indicates the actual fuel injection pulse width
compensated by ECM according to the input sig-
nals.
• When the engine is stopped, a certain
computed value is indicated.
IGN TIMING
BTDC
• Indicates the ignition timing computed by ECM
according to the input signals.
• When the engine is stopped, a certain
value is indicated.
PURG VOL C/V
%
• Indicates the EVAP canister purge volume con-
trol solenoid valve control value computed by the
ECM according to the input signals.
• The opening becomes larger as the value in-
creases.
INT/V TIM (B1)
°
CA
• Indicates [
°
CA] of intake camshaft advance an-
gle.
INT/V SOL-B1
%
• The control value of the intake valve timing con-
trol solenoid valve (determined by ECM accord-
ing to the input signals) is indicated.
• The advance angle becomes larger as the value
increases.
AIR COND RLY
ON/OFF
• The air conditioner relay control condition (deter-
mined by ECM according to the input signals) is
indicated.
FUEL PUMP RLY
ON/OFF
• Indicates the fuel pump relay control condition
determined by ECM according to the input sig-
nals.
THRTL RELAY
ON/OFF
• Indicates the throttle control motor relay control
condition determined by the ECM according to
the input signals.
COOLING FAN
HI/LOW/OFF
• Indicates the condition of the cooling fan (deter-
mined by ECM according to the input signals).
HI: High speed operation
LOW: Low speed operation
OFF: Stop
HO2S1 HTR (B1)
ON/OFF
• Indicates [ON/OFF] condition of heated oxygen
sensor 1 heater determined by ECM accordining
to the input signals.
HO2S2 HTR (B1)
ON/OFF
• Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according to
the input signals.
Monitored item
Unit
Description
Remarks
EC-1056
< FUNCTION DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
VEHICLE SPEED
km/h or mph
• The vehicle speed computed from the vehicle
speed signal sent from TCM is displayed.
IDL A/V LEARN
YET/CMPLT
• Display the condition of Idle Air Volume Learning
YET: Idle air volume learning has not been per-
formed yet.
CMPLT: Idle air volume learning has already
been performed successfully.
02SEN HTR DTY
%
• Indicates the heated oxygen sensor 1 heater con-
trol value computed by the ECM according to the
input signals.
AC PRESS SEN
V
• The signal voltage from the refrigerant pressure
sensor is displayed.
VHCL SPEED SE
km/h or mph
• The vehicle speed computed from the vehicle
speed signal sent from combination meter is dis-
played.
SET VHCL SPD
km/h or mph
• The preset vehicle speed is displayed.
MAIN SW
ON/OFF
• Indicates [ON/OFF] condition from MAIN switch
signal.
CANCEL SW
ON/OFF
• Indicates [ON/OFF] condition from CANCEL
switch signal.
RESUME/ACC SW
ON/OFF
• Indicates [ON/OFF] condition from RESUME/AC-
CELERATE switch signal.
SET SW
ON/OFF
• Indicates [ON/OFF] condition from SET/COAST
switch signal.
BRAKE SW1
ON/OFF
• Indicates [ON/OFF] condition from ASCD brake
switch signal.
BRAKE SW2
ON/OFF
• Indicates [ON/OFF] condition of stop lamp switch
signal.
VHCL SPD CUT
NON/CUT
• Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed decreased to excessively
low compared with the ASCD set speed, and
ASCD operation is cut off.
LO SPEED CUT
NON/CUT
• Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at the ASCD
set speed.
CUT: Vehicle speed decreased to excessively
low, and ASCD operation is cut off.
AT OD MONITOR
ON/OFF
• Indicates [ON/OFF] condition of CVT according
to the input signal from the TCM.
• For M/T models, always “OFF” is dis-
played.
AT OD CANCEL
ON/OFF
• Indicates [ON/OFF] condition of CVT cancel re-
quest signal.
• For M/T models, always “OFF” is dis-
played.
CRUISE LAMP
ON/OFF
• Indicates [ON/OFF] condition of CRUISE lamp
determined by the ECM according to the input
signals.
SET LAMP
ON/OFF
• Indicates [ON/OFF] condition of SET lamp deter-
mined by the ECM according to the input signals.
Voltage
V
• Voltage, frequency, duty cycle or pulse width
measured by the probe.
• Only “#” is displayed if item is unable
to be measured.
• Figures with “#”s are temporary ones.
They are the same figures as an actu-
al piece of data which was just previ-
ously measured.
Frequency
msec, Hz or %
DUTY-HI
—
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOW
Monitored item
Unit
Description
Remarks
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-1057
< FUNCTION DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
C
D
E
F
G
H
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EC
N
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NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
FUEL INJECTION
• Engine: Return to the original
trouble condition
• Change the amount of fuel injec-
tion using CONSULT-III.
If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Fuel injector
• Heated oxygen sensor 1
IGNITION TIMING
• Engine: Return to the original
trouble condition
• Timing light: Set
• Retard the ignition timing using
CONSULT-III.
If trouble symptom disappears, see
CHECK ITEM.
• Perform Idle Air Volume Learning.
POWER BALANCE
• Engine: After warming up, idle
the engine.
• A/C switch OFF
• Shift lever: P or N (CVT), Neutral
(M/T)
• Cut off each fuel injector signal
one at a time using CONSULT-
III.
Engine runs rough or dies.
• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
COOLING FAN*
• Ignition switch: ON
• Turn the cooling fan “LOW”, “HI”
and “OFF” CONSULT-III.
Cooling fan moves and stops.
• Harness and connectors
• IPDM E/R (Cooling fan relay)
• Cooling fan motor
ENG COOLANT
TEMP
• Engine: Return to the original
trouble condition
• Change the engine coolant tem-
perature using CONSULT-III.
If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Engine coolant temperature sen-
sor
• Fuel injector
FUEL PUMP RELAY
• Ignition switch: ON (Engine
stopped)
• Turn the fuel pump relay “ON”
and “OFF” using CONSULT-III
and listen to operating sound.
Fuel pump relay makes the operat-
ing sound.
• Harness and connectors
• Fuel pump relay
PURG VOL CONT/V
• Engine: After warming up, run
engine at 1,500 rpm.
• Change the EVAP canister
purge volume control solenoid
valve opening percent using
CONSULT-III.
Engine speed changes according
to the opening percent.
• Harness and connectors
• Solenoid valve
V/T ASSIGN ANGLE
• Engine: Return to the original
trouble condition
• Change intake valve timing us-
ing CONSULT-III.
If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Intake valve timing control sole-
noid valve
EC-1058
< COMPONENT DIAGNOSIS >
[MR20DE (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Description
INFOID:0000000001094085
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 Check
INFOID:0000000001094086
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
- CVT models: After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID
TEMP SE” (CVT fluid temperature sensor signal) indicates more than 60
°
C (140
°
F).
- M/T models: 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.
EC-986, "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-1061, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000001094087
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