Nissan Qashqai J11. Manual — part 273
DIAGNOSIS SYSTEM (ECM)
ECM-69
< SYSTEM DESCRIPTION >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
IDL A/V LEARN
YET/
DONE
Displays the condition of Idle Air Volume Learning.
• YET...Idle air volume learning has not been per-
formed yet.
• DONE...Idle air volume learning has already been
performed successfully.
TRVL AFTER MIL
km or
mile
Distance traveled while MIL is activated.
ENG OIL TEMP
°
C
°
F
The engine oil temperature (determined by the signal
voltage of the engine oil temperature sensor) is dis-
played.
A/F S1 HTR (B1)
%
• Indicates the duty ratio of the Air fuel ratio (A/F) sen-
sor 1 heater computed by ECM according to the input
signals.
• The current flow to the heater becomes larger as the
value increases.
VHCL SPEED SE
km/h or
mph
The vehicle speed computed from the vehicle speed
signal sent from unified meter and combination meter is
displayed.
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 sig-
nal.
RESUME/ACC SW
ON/
OFF
Indicates [ON/OFF] condition from RESUME/ACCEL-
ERATE switch signal.
SET SW
ON/
OFF
Indicates [ON/OFF] condition from SET/COAST switch
signal.
BRAKE SW1
ON/
OFF
Indicates [ON/OFF] condition from brake pedal position
switch signal.
BRAKE SW2
ON/
OFF
Indicates [ON/OFF] condition of stop lamp switch sig-
nal.
VHCL SPD CUT
NON/
CUT
Indicates the vehicle cruise condition.
• NON...Vehicle speed is maintained at the ASCD set
speed.
• CUT...When the vehicle speed decreased to exces-
sively low speed compared with the ASCD set speed,
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...When the vehicle speed decreased lower than
the ASCD minimum set speed, ASCD operation is cut
off.
AT OD MONITOR
ON/
OFF
Indicates [ON/OFF] condition of A/T O/D according to
the input signal from the TCM.
AT OD CANCEL
ON/
OFF
Indicates [ON/OFF] condition of A/T O/D cancel request
signal.
CRUISE LAMP
ON/
OFF
Indicates [ON/OFF] condition of CRUISE indicator de-
termined by the ECM according to the input signals.
SET LAMP
ON/
OFF
Indicates [ON/OFF] condition of SET indicator deter-
mined by the ECM according to the input signals.
A/F ADJ-B1
—
Indicates the correction of a factor stored in ECM. The
factor is calculated from the difference between the tar-
get air-fuel ratio stored in ECM and the air-fuel ratio cal-
culated from A/F sensor 1 signal.
Monitored item
Unit
Description
Remarks
ECM-70
< SYSTEM DESCRIPTION >
[MR20DD]
DIAGNOSIS SYSTEM (ECM)
NOTE:
Any monitored item that does not match the vehicle is not displayed.
*: Indicates intake manifold runner control valve.
WORK SUPPORT MODE
Work Item
P/N POSI SW
ON/
OFF
Indicates [ON/OFF] condition from the reverse/neutral
position signal.
INT/A TEMP SE
°
C or
°
F
The intake air temperature (determined by the signal
voltage of the intake air temperature sensor) is indicat-
ed.
AC PRESS SEN
V
The signal voltage from the refrigerant pressure sensor
is displayed.
FUEL PRESS SEN
MPa
Indicates the fuel rail pressure computed by ECM ac-
cording to the input signals.
ATOM PRES SEN
V
The signal voltage from the barometric pressure sensor
is displayed.
FUEL INJ B1
msec
ECM-calculated injection pulse width of the fuel injector
on the Bank 1 side.
H/P FUEL PUMP DEG
deg
Displays ECM-calculated fuel discharge position of the
high pressure fuel pump.
FUEL PRES SEN V
mV
The signal voltage of FRP sensor is displayed.
EOP SENSOR
mV
The signal voltage of EOP sensor is displayed.
ECM TEMP 1
°
C
Displays a temperature calculated from a signal of ECM
temperature sensor 1.
ECM TEMP 2
°
C
Displays a temperature calculated from a signal of ECM
temperature sensor 2.
FUEL INJ TIM
BTDC
Indicates the fuel injection timing computed by ECM ac-
cording to the input signals.
FAN DUTY
%
• Indicates a command value for cooling fan. The value
is calculated by ECM based on input signals.
THRTL STK CNT B1
—
NOTE:
These items are displayed but are not applicable to this
model.
A/F SEN1 (B1)
V
• The A/F signal computed from the input signal of the
air fuel ratio (A/F) sensor 1 is displayed.
A/F-S ATMSPHRC CRCT
B1
—
Displays a determined value of atmospheric correction
factor necessary for correcting an A/F sensor signal in-
put to ECM. The signal used for the correction is an A/
F sensor signal transmitted while driving under atmo-
spheric pressure.
A/F-S ATMSPHRC CRCT
UP B1
count
Displays the number of updates of the A/F sensor atmo-
spheric correction factor.
A/F SEN1 DIAG2(B1)
INCMP/
CMPLT
• Indicates DTC P014C or P014D self-diagnosis condi-
tion.
- INCMP: Self-diagnosis is incomplete.
- CMPLT: Self-diagnosis is complete.
A/F SEN1 DIAG3(B1)
ABSNT/
PRSNT
• Indicates DTC P014C, P014D, P015A or P015B self-
diagnosis condition.
- ABSNT: The vehicle condition is not within the diag-
nosis range.
- PRSNT: The vehicle condition is within the diagnosis
range.
Monitored item
Unit
Description
Remarks
DIAGNOSIS SYSTEM (ECM)
ECM-71
< SYSTEM DESCRIPTION >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
*: This function is not necessary in the usual service procedure.
ACTIVE TEST MODE
Test Item
Work item
Condition
Usage
IDLE AIR VOL LEARN
The idle air volume that keeps the engine speed within the
specified range is memorized in ECM.
When learning the idle air volume
FUEL PRESSURE RE-
LEASE
• Fuel pump will stop by touching “START” during idling.
• Crank a few times after engine stops.
When releasing fuel pressure from fuel line
TARGET IDLE RPM
ADJ*
Idle condition
When setting target idle speed
SELF-LEARNING
CONT
The coefficient of self-learning control mixture ratio returns
to the original coefficient.
When clearing mixture ratio selflearning
value.
TARGET IGN TIM ADJ*
Idle condition
When adjusting target ignition timing
VIN REGISTRATION
In this mode, VIN is registered in ECM.
When registering VIN in ECM
CLSD THL POS LEARN
Ignition switch ON and engine stopped.
When learning the throttle valve closed po-
sition
SAVING DATA FOR RE-
PLC CPU
In this mode, save data that is in ECM.
When ECM is replaced.
WRITING DATA FOR
REPLC CPU
In this mode, write data stored by “SAVE DATA FOR CPU
REPLC” in work support mode to ECM.
When ECM is replaced.
TEST ITEM
CONDITION
JUDGMENT
CHECK ITEM (REMEDY)
ENG COOLANT
TEMP
Change the engine coolant tempera-
ture using CONSULT.
If malfunctioning symptom dis-
appears, see CHECK ITEM.
• Harness and connectors
• Engine coolant temperature
sensor
• Fuel injector
FUEL INJECTION
Change the amount of fuel injection
using CONSULT.
If malfunctioning symptom dis-
appears, see CHECK ITEM.
• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
PURG VOL CONT/V
• Engine: After warming up, run en-
gine at 1,500 rpm.
• Change the EVAP canister purge
volume control solenoid valve open-
ing percent using CONSULT.
Engine speed changes accord-
ing to the opening percent.
• Harness and connectors
• EVAP canister purge volume
control solenoid valve
FUEL PUMP RELAY
• Ignition switch: ON (Engine
stopped)
• Turn the fuel pump relay “ON” and
“OFF” using CONSULT and listen to
operating sound.
Fuel pump relay makes the op-
erating sound.
• Harness and connectors
• Fuel pump relay
INTAKE MANIFOLD
RUNNER CON-
TROL VALVE
(OPEN/CLOSE)
• Ignition switch: ON (Engine
stopped)
• Turn the intake manifold runner con-
trol valve “ON” and “OFF” using
CONSULT to open or close.
Touch the intake manifold run-
ner control valve motor and
check the operating vibration
and sound.
• Harness and connectors
• Intake manifold runner control
valve
• Intake manifold runner control
valve motor
FAN DUTY CON-
TROL
*
• Engine: Idle
• Change duty ratio (0 - 100%) using
CONSULT.
Cooling fan moves and stops.
• Harness and connectors
• Cooling fan motor
• Cooling fan relay
• IPDM E/R
IGNITION TIMING
• Timing light: Set
• Retard the ignition timing using
CONSULT.
If malfunctioning symptom dis-
appears, see CHECK ITEM.
Perform Idle Air Volume Learn-
ing.
ECM-72
< SYSTEM DESCRIPTION >
[MR20DD]
DIAGNOSIS SYSTEM (ECM)
*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.
DTC WORK SUPPORT MODE
Teat Item
SRT & P-DTC MODE
SRT STATUS Mode
For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT screen; for items whose SRT-
codes are not set, “INCMP” is displayed.
SRT WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
POWER BALANCE
• Engine: After warming up, idle the
engine.
• A/C switch OFF
• Selector lever: N (CVT), Neutral (M/
T)
• Cut off each injector signal one at a
time using CONSULT.
Engine runs rough or stops.
(Works for accidental fire.)
• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
INT V/T ASSIGN AN-
GLE
Changes intake valve timing using
CONSULT.
If malfunctioning symptom dis-
appears, see CHECK ITEM.
• Harness and connectors
• Intake valve timing control so-
lenoid valve
EXT V/T ASSIGN
ANGLE
Changes exhaust valve timing using
CONSULT.
If malfunctioning symptom dis-
appears, see CHECK ITEM.
• Harness and connectors
• Exhaust valve timing control
solenoid valve
TEST ITEM
CONDITION
JUDGMENT
CHECK ITEM (REMEDY)
Test mode
Test item
Reference page
HO2S2
O2 (B1) P0138
O2 (B1) P0137
A/F SEN1
A/F (B1) P0133
A/F (B1) P0130
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