Nissan Pathfinder (2011 year). Instruction — part 310
EC-534
< SYSTEM DESCRIPTION >
[VK56DE]
DIAGNOSIS SYSTEM (ECM)
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 com-
puted value is indicated.
INJ PULSE-B2
msec
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.
CAL/LD VALUE
%
• “Calculated load value” indicates the value of the
current air flow divided by peak air flow.
MASS AIRFLOW
g/s
• Indicates the mass air flow computed by ECM ac-
cording to the signal voltage of the mass air flow
sensor.
PURG VOL C/V
%
• Indicates the EVAP canister purge volume control
solenoid valve control value computed by 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 advanced an-
gle.
INT/V TIM(B2)
°
CA
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.
INT/V SOL(B2)
%
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.
VENT CONT/V
ON/OFF
• The control condition of the EVAP canister vent
control valve (determined by ECM according to
the input signals) is indicated.
ON: Closed
OFF: Open
THRTL RELAY
ON/OFF
• Indicates the throttle control motor relay control
condition determined by ECM according to the in-
put signals.
COOLING FAN
HI/LOW/
OFF
• The control condition of the cooling fan (deter-
mined by ECM according to the input signals) is
indicated.
HI: High speed operation
LOW: Low speed operation
OFF: Stop
HO2S2 HTR (B1)
ON/OFF
• Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according to
the input signals.
HO2S2 HTR (B2)
ON/OFF
I/P PULLY SPD
rpm
• Indicates the engine speed computed from the in-
put speed sensor signal.
VEHICLE SPEED
km/h or
mph
• Indicates the vehicle speed computed from the
output speed sensor signal.
IDL A/V LEARN
YET/CM-
PLT
• Displays 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.
TRVL AFTER MIL
km or
mile
• Distance traveled while MIL is activated.
Monitored item
Unit
Description
Remarks
2011 Pathfinder
DIAGNOSIS SYSTEM (ECM)
EC-535
< SYSTEM DESCRIPTION >
[VK56DE]
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A/F S1 HTR(B1)
%
• A/F sensor 1 heater control value computed by
ECM according to the input signals.
• The current flow to the heater becomes larger as
the value increases.
A/F S1 HTR(B2)
%
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 unified meter control unit
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 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 increased to excessively
high 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 compared with the ASCD set speed, and
ASCD operation is cut off.
AT OD MONITOR
ON/OFF
• Indicates [ON/OFF] condition of A/T O/D accord-
ing to the input signal from TCM.
AT OD CANCEL
ON/OFF
• Indicates [ON/OFF] condition of A/T O/D cancel
signal sent from TCM.
CRUISE LAMP
ON/OFF
• Indicates [ON/OFF] condition of CRUISE lamp
determined by ECM according to the input sig-
nals.
SET LAMP
ON/OFF
• Indicates [ON/OFF] condition of SET lamp deter-
mined by ECM according to the input signals.
ALT DUTY
%
• Indicates the duty ratio of the power generation
command value. The ratio is calculated by ECM
based on the battery current sensor signal.
BAT CUR SEN
mV
• The signal voltage of battery current sensor is
displayed.
ALT DUTY SIG
ON/OFF
• The control condition of the power generation
voltage variable control (determined by ECM ac-
cording to the input signals) is indicated.
ON: Power generation voltage variable control is
active.
OFF: Power generation voltage variable control is
inactive.
Monitored item
Unit
Description
Remarks
2011 Pathfinder
EC-536
< SYSTEM DESCRIPTION >
[VK56DE]
DIAGNOSIS SYSTEM (ECM)
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
A/F ADJ-B1
—
• Indicates the correction factor stored in ECM. The
factor is calculated from the difference between
the target air/fuel ratio stored in ECM and the air-
fuel ratio calculated from A/F sensor 1 signal.
A/F ADJ-B2
—
HO2 S2 DIAG2
(B1)
[INCMP/CMPLT]
• Indicates DTC P0139 self-diagnosis (slow re-
sponse) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.
The item is indicated, but not used.
HO2 S2 DIAG2
(B2)
[INCMP/CMPLT]
• Indicates DTC P0159 self-diagnosis (slow re-
sponse) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.
The item is indicated, but not used.
Monitored item
Unit
Description
Remarks
TEST ITEM
CONDITION
JUDGMENT
CHECK ITEM (REMEDY)
FUEL INJEC-
TION
• 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
• Air fuel ratio (A/F) sensor 1
IGNITION TIM-
ING
• 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 BAL-
ANCE
• Engine: After warming up, idle the
engine.
• A/C switch: OFF
• Selector lever: P or N
• Cut off each 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 HI and OFF
using CONSULT-III.
Cooling fan moves and stops.
• Harness and connectors
• Cooling fan motor
• IPDM E/R
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 RE-
LAY
• Ignition switch: ON
(Engine stopped)
• Turn the fuel pump relay ON and
OFF using CONSULT-III and lis-
ten 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 en-
gine at 1,500 rpm.
• Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-III.
Engine speed changes according to
the opening percent.
• Harness and connectors
• Solenoid valve
FUEL/T TEMP
SEN
• Change the fuel tank temperature using CONSULT-III.
2011 Pathfinder
DIAGNOSIS SYSTEM (ECM)
EC-537
< SYSTEM DESCRIPTION >
[VK56DE]
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*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT-III screen; for items whoseSRT
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.
DTC WORK SUPPORT Mode
*: DTC P1442 and P1456 does not apply to R51 models but appears in DTC Work Support Mode screens.
VENT CON-
TROL/V
• Ignition switch: ON
(Engine stopped)
• Turn solenoid valve ON and OFF
with the CONSULT-III and listen
to operating sound.
Solenoid valve makes an operating
sound.
• Harness and connectors
• Solenoid valve
V/T ASSIGN AN-
GLE
• Engine: Return to the original
trouble condition
• Change intake valve timing using
CONSULT-III.
If trouble symptom disappears, see
CHECK ITEM.
• Harness and connectors
• Intake valve timing control sole-
noid valve
ALTERNATOR
DUTY
• Engine: Idle
• Change duty ratio using CON-
SULT-III.
Battery voltage changes.
• Harness and connectors
• IPDM E/R
• Alternator
TEST ITEM
CONDITION
JUDGMENT
CHECK ITEM (REMEDY)
Test mode
Test item
Corresponding DTC No.
Reference page
EVAPORATIVE
SYSTEM
PURG FLOW P0441
P0441
EC-744, "DTC Confirmation Procedure"
EVP SML LEAK P0442/P1442*
P0455
EC-785, "DTC Confirmation Procedure"
EVP V/S LEAK P0456/P1456*
P0442
EC-750, "DTC Confirmation Procedure"
P0456
EC-793, "DTC Confirmation Procedure"
PURG VOL CN/V P1444
P0443
EC-757, "DTC Confirmation Procedure"
A/F SEN1
A/F SEN1 (B1) P1276
P0130
EC-665, "DTC Confirmation Procedure"
A/F SEN1 (B1) P1278/P1279
P0133
EC-677, "DTC Confirmation Procedure"
A/F SEN1 (B2) P1286
P0150
EC-665, "DTC Confirmation Procedure"
A/F SEN1 (B2) P1288/P1289
P0153
EC-677, "DTC Confirmation Procedure"
HO2S2
HO2S2 (B1) P0139
P0139
EC-696, "DTC Confirmation Procedure"
HO2S2 (B1) P1146
P0138
EC-688, "DTC Confirmation Procedure"
HO2S2 (B1) P1147
P0137
EC-683, "DTC Confirmation Procedure"
HO2S2 (B2) P0159
P0159
EC-696, "DTC Confirmation Procedure"
HO2S2 (B2) P1166
P0158
EC-688, "DTC Confirmation Procedure"
HO2S2 (B2) P1167
P0157
EC-683, "DTC Confirmation Procedure"
2011 Pathfinder
EC-538
< ECU DIAGNOSIS INFORMATION >
[VK56DE]
ECM
ECU DIAGNOSIS INFORMATION
ECM
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000006244625
Remarks:
z
Specification data are reference values.
z
Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show
the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor
and other ignition timing related sensors.
MONITOR ITEM
CONDITION
SPECIFICATION
ENG SPEED
• Run engine and compare CONSULT-III value with the tachometer indication.
Almost the same speed as the
tachometer indication.
MAS A/F SE-B1
B/FUEL SCHDL
See
A/F ALPHA-B1
A/F ALPHA-B2
See
COOLAN TEMP/S
• Engine: After warming up
More than 70
°
C (158
°
F)
A/F SEN1 (B1)
A/F SEN1 (B2)
• Engine: After warming up
Maintaining engine speed at 2,000
rpm
Fluctuates around 2.2 V
HO2S2 (B1)
HO2S2 (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
• After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no load
0 - 0.3 V
←→
Approx. 0.6 - 1.0
V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle
for 1 minute under no load
LEAN
←→
RICH
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer
indication.
Almost the same speed as the
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14 V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.65 - 1.87 V
Accelerator pedal: Fully depressed
More than 4.3 V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.56 - 0.96 V
Accelerator pedal: Fully depressed
More than 4.0 V
TP SEN 1-B1
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8 V
START SIGNAL
• Ignition switch: ON
→
START
→
ON
OFF
→
ON
→
OFF
CLSD THL POS
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed
OFF
AIR COND SIG
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor: Operates.)
ON
P/N POSI SW
• Ignition switch: ON
Selector lever: P or N position
ON
Selector lever: Except above position
OFF
2011 Pathfinder
ECM
EC-539
< ECU DIAGNOSIS INFORMATION >
[VK56DE]
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PW/ST SIGNAL
• Engine: After warming up, idle the
engine
Steering wheel: Not being turned
(Forward direction)
OFF
Steering wheel: Being turned
ON
LOAD SIGNAL
• Ignition switch: ON
Rear window defogger switch is ON
and/or lighting switch is in 2nd.
ON
Rear window defogger switch is OFF
and lighting switch is OFF.
OFF
IGNITION SW
• Ignition switch: ON
→
OFF
→
ON
ON
→
OFF
→
ON
HEATER FAN SW
• Engine: After warming up, idle the
engine
Heater fan control switch: OFF
OFF
Heater fan control switch: ON
ON
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
INJ PULSE-B2
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
2.0 - 2.8 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
10
°
- 20
°
BTDC
2,000 rpm
25
°
- 45
°
BTDC
CAL/LD VALUE
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
14% - 33%
2,500 rpm
12% - 25%
MASS AIRFLOW
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
3.0 - 9.0 g/s
2,500 rpm
9.0 - 28.0 g/s
PURG VOL C/V
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal: Not depressed
even slightly, after engine starting.)
0%
2,000 rpm
—
INT/V TIM (B1)
INT/V TIM (B2)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
2,000 rpm
Approx. 0
°
- 20
°
CA
INT/V SOL (B1)
INT/V SOL (B2)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 25% - 50%
AIR COND RLY
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor: Operates)
ON
FUEL PUMP RLY
• For 1 second after turning ignition switch ON
• Engine running or cranking
ON
• Except above conditions
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
MONITOR ITEM
CONDITION
SPECIFICATION
2011 Pathfinder
EC-540
< ECU DIAGNOSIS INFORMATION >
[VK56DE]
ECM
COOLING FAN
• Engine: After warming up, idle the
engine
• Air conditioner switch: OFF
Engine coolant temperature: 97
°
C
(207
°
F) or less
OFF
Engine coolant temperature: Between
98
°
C (208
°
F) and 100
°
C (212
°
F)
LOW
Engine coolant temperature: 101
°
C
(214
°
F) or more
HI
HO2S2 HTR (B1)
HO2S2 HTR (B2)
• Engine speed is below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no load
ON
• Engine speed: Above 3,600 rpm
OFF
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as the
tachometer indication
VEHICLE SPEED
• Turn drive wheels and compare CONSULT-III value with the speedometer
indication.
Almost the same speed as the
speedometer indication
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has illu-
minated.
0 - 65,535 km
(0 - 40,723 mile)
A/F S1 HTR (B1)
A/F S1 HTR (B2)
• Engine: After warming up, idle the engine
4 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates.)
1.0 - 4.0 V
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer
indication.
Almost the same speed as the
speedometer indication
SET VHCL SPD
• Engine: Running
ASCD: Operating.
The preset vehicle speed is
displayed.
MAIN SW
• Ignition switch: ON
MAIN switch: Pressed
ON
MAIN switch: Released
OFF
CANCEL SW
• Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
• Ignition switch: ON
RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch: Re-
leased
OFF
SET SW
• Ignition switch: ON
SET/COAST switch: Pressed
ON
SET/COAST switch: Released
OFF
BRAKE SW1
• Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
BRAKE SW2
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
CRUISE LAMP
• Ignition switch: ON
MAIN switch: Pressed at the 1st time
→
at the 2nd time
ON
→
OFF
SET LAMP
• MAIN switch: ON
• Vehicle speed: Between 40 km/h
(25 MPH) and 144 km/h (89 MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
ALT DUTY
• Engine: Idle
0 - 80%
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged*
2
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
MONITOR ITEM
CONDITION
SPECIFICATION
2011 Pathfinder
ECM
EC-541
< ECU DIAGNOSIS INFORMATION >
[VK56DE]
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*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm the battery is fully charged. Refer to
ECM Harness Connector Terminal Layout
INFOID:0000000006244626
ECM Terminal and Reference Value
INFOID:0000000006244627
PREPARATION
ECM is located in the engine room passenger side behind battery.
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-III.
CAUTION:
Never use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
HO2 S2 DIAG2 (B1)
NOTE:
The item is indicated, but not used.
—
HO2 S2 DIAG2 (B2)
NOTE:
The item is indicated, but not used.
—
MONITOR ITEM
CONDITION
SPECIFICATION
PBIB3368E
BBIA0386E
2011 Pathfinder
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