Nissan Pathfinder (2005 year). Instruction — part 159
TROUBLE DIAGNOSIS
EC-123
C
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EC
2005 Pathfinder
78
GR
Sensor ground
(Heated oxygen sensor)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
79
80
81
P
GR
G
Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
0 - 0.2V
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,500 rpm
0.1 - 0.4V
82
B
Sensor ground
(APP sensor 1, ASCD steer-
ing switch
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
83
B
Sensor ground
(APP sensor 2)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
85
W
Data link connector
[Ignition switch: ON]
●
CONSULT-II or GST: disconnected
Approximately 5V - Battery volt-
age (11 - 14V)
86
P
CAN communication line
[Ignition switch: ON]
Approximately 1.1 - 2.3V
Output voltage varies with the
communication status.
90
L
Sensor power supply
(APP sensor 1)
[Ignition switch: ON]
Approximately 5V
91
G
Sensor power supply
(APP sensor 2)
[Ignition switch: ON]
Approximately 5V
94
L
CAN communication line
[Ignition switch: ON]
Approximately 2.6 - 3.2V
Output voltage varies with the
communication status.
98
GR
Accelerator pedal position
sensor 2
[Ignition switch: ON]
●
Engine: Stopped
●
Accelerator pedal: Fully released
0.28 - 0.48V
[Ignition switch: ON]
●
Engine: Stopped
●
Accelerator pedal: Fully depressed
More than 2.0
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC986C
SEC987C
EC-124
TROUBLE DIAGNOSIS
2005 Pathfinder
99
SB
ASCD steering switch
[Ignition switch: ON]
●
ASCD steering switch: OFF
Approximately 4.0V
[Ignition switch: ON]
●
MAIN switch: Pressed
Approximately 0V
[Ignition switch: ON]
●
CANCEL switch: Pressed
Approximately 1V
[Ignition switch: ON]
●
RESUME/ACCELERATE switch: Pressed
Approximately 3V
[Ignition switch: ON]
●
SET/COAST switch: Pressed
Approximately 2V
101
LG
Stop lamp switch
[Ignition switch: OFF]
●
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
●
Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
102
G
PNP switch
[Ignition switch: ON]
●
Shift lever: P or N
Approximately 0V
[Ignition switch: ON]
●
Except above position
BATTERY VOLTAGE
(11 - 14V)
104
O
Throttle control motor relay
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
106
R
Accelerator pedal position
sensor 1
[Ignition switch: ON]
●
Engine: Stopped
●
Accelerator pedal: Fully released
0.65 - 0.87V
[Ignition switch: ON]
●
Engine: Stopped
●
Accelerator pedal: Fully depressed
More than 4.3V
107
Y
Fuel tank temperature sen-
sor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.
108
LG
ASCD brake switch
[Ignition switch: ON]
●
Brake pedal: Slightly depressed
Approximately 0V
[Ignition switch: ON]
●
Brake pedal: Fully released
BATTERY VOLTAGE
(11 - 14V)
109
W/R
Ignition switch
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
111
BR
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch: OFF]
●
For a few seconds after turning ignition
switch OFF
0 - 1.5V
[Ignition switch: OFF]
●
More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
TROUBLE DIAGNOSIS
EC-125
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2005 Pathfinder
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
*: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
SC-5, "SPECIFIC GRAVITY CHECK"
.
CONSULT-II Function (ENGINE)
UBS00K4C
FUNCTION
*: The following emission-related diagnostic information is cleared when the ECM memory is erased.
●
Diagnostic trouble codes
●
1st trip diagnostic trouble codes
●
Freeze frame data
●
1st trip freeze frame data
●
System readiness test (SRT) codes
●
Test values
113
Y
Fuel pump relay
[Ignition switch: ON]
●
For 1 second after turning ignition switch ON
[Engine is running]
0 - 1.5V
[Ignition switch: ON]
●
More than 1 second after turning ignition
switch ON
BATTERY VOLTAGE
(11 - 14V)
115
116
B
GR
ECM ground
[Engine is running]
●
Idle speed
Body ground
117
G
EVAP canister vent control
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
119
120
R
P
Power supply for ECM
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
121
R/B
Power supply for ECM
(Back-up)
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
Diagnostic test mode
Function
Work support
This mode enables a technician to adjust some devices faster and more accurately by following the
indications on the CONSULT-II unit.
Self-diagnostic results
Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*
Data monitor
Input/Output data in the ECM can be read.
Data monitor (SPEC)
Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the
other data monitor items can be read.
CAN diagnostic support
monitor
The results of transmit/receive diagnosis of CAN communication can be read.
Active test
Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
shifts some parameters in a specified range.
Function test
This mode is used to inform customers when their vehicle condition requires periodic maintenance.
DTC & SRT confirmation
The status of system monitoring tests and the self-diagnosis status/result can be confirmed.
ECM part number
ECM part number can be read.
EC-126
TROUBLE DIAGNOSIS
2005 Pathfinder
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
Item
DIAGNOSTIC TEST MODE
WORK
SUP-
PORT
SELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TOR
DATA
MONI-
TOR
(SPEC)
ACTIVE
TEST
DTC & SRT
CONFIRMATION
DTC*1
FREEZE
FRAME
DATA*2
SRT
STATUS
DTC
WORK
SUP-
PORT
ENGINE
C
ONTROL
COMPONENT
P
ARTS
IN
P
U
T
Crankshaft position sensor (POS)
×
×
×
×
Camshaft position sensor (PHASE)
×
×
×
×
Mass air flow sensor
×
×
×
Engine coolant temperature sensor
×
×
×
×
×
Air fuel ratio (A/F) sensor 1
×
×
×
×
×
Heated oxygen sensor 2
×
×
×
×
×
Wheel sensor
×
×
×
×
Accelerator pedal position sensor
×
×
×
Throttle position sensor
×
×
×
Fuel tank temperature sensor
×
×
×
×
EVAP control system pressure
sensor
×
×
×
Intake air temperature sensor
×
×
×
×
Knock sensor
×
Refrigerant pressure sensor
×
×
Closed throttle position switch
(accelerator pedal position sensor
signal)
×
×
Air conditioner switch
×
×
Park/neutral position (PNP) switch
×
×
×
Stop lamp switch
×
×
×
Power steering pressure sensor
×
×
×
Battery voltage
×
×
Load signal
×
×
Fuel level sensor
×
×
×
Battery current sensor
×
×
×
ASCD steering switch
×
×
×
ASCD brake switch
×
×
×
TROUBLE DIAGNOSIS
EC-127
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EC
2005 Pathfinder
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to
.
INSPECTION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1.
Turn ignition switch OFF.
2.
Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector, which is located under LH dash panel near the
hood opener handle.
3.
Turn ignition switch ON.
ENGI
NE
CONTROL
C
OMPONENT
P
ARTS
OUTPUT
Fuel injector
×
×
×
Power transistor (Ignition timing)
×
×
×
Throttle control motor relay
×
×
×
Throttle control motor
×
EVAP canister purge volume con-
trol solenoid valve
×
×
×
×
×
Air conditioner relay
×
×
Fuel pump relay
×
×
×
×
Cooling fan relay
×
×
×
×
Air fuel ratio (A/F) sensor 1 heater
×
×
×
×
Heated oxygen sensor 2 heater
×
×
×
×
EVAP canister vent control valve
×
×
×
×
×
Intake valve timing control solenoid
valve
×
×
×
×
VIAS control solenoid valve
×
×
×
×
Alternator
×
×
×
Calculated load value
×
×
×
Item
DIAGNOSTIC TEST MODE
WORK
SUP-
PORT
SELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TOR
DATA
MONI-
TOR
(SPEC)
ACTIVE
TEST
DTC & SRT
CONFIRMATION
DTC*1
FREEZE
FRAME
DATA*2
SRT
STATUS
DTC
WORK
SUP-
PORT
BBIA0538E
EC-128
TROUBLE DIAGNOSIS
2005 Pathfinder
4.
Touch “START (NISSAN BASED VHCL)”.
5.
Touch “ENGINE”.
If “ENGINE” is not indicated, go to
.
6.
Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation Instruction.
WORK SUPPORT MODE
Work Item
BCIA0029E
BCIA0030E
BCIA0031E
WORK ITEM
CONDITION
USAGE
FUEL PRESSURE RELEASE
●
FUEL PUMP WILL STOP BY TOUCHING “START” DUR-
ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.
When releasing fuel pressure
from fuel line
IDLE AIR VOL LEARN
●
THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.
When learning the idle air volume
SELF-LEARNING CONT
●
THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.
When clearing the coefficient of
self-learning control value
TROUBLE DIAGNOSIS
EC-129
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EC
2005 Pathfinder
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to
EC-49, "EMISSION-RELATED DIAGNOSTIC INFORMA-
.
Freeze Frame Data and 1st Trip Freeze Frame Data
EVAP SYSTEM CLOSE
CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE
FOLLOWING CONDITIONS.
●
IGN SW ON
●
ENGINE NOT RUNNING
●
AMBIENT TEMPERATURE IS ABOVE 0
°
C (32
°
F).
●
NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-
TEM
●
FUEL TANK TEMP. IS MORE THAN 0
°
C (32
°
F).
●
WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-
TEM CLOSE”
●
WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
II WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.
NOTE:
WHEN STARTING ENGINE, CONSULT-II MAY DISPLAY
“BATTERY VOLTAGE IS LOW. CHARGE BATTERY”,
EVEN IN USING CHARGED BATTERY.
When detecting EVAP vapor leak
point of EVAP system
VIN REGISTRATION
●
IN THE MODE, VIN IS REGISTERED IN ECM.
When registering VIN in ECM
TARGET IDLE RPM ADJ*
●
IDLE CONDITION
When setting target idle speed
TARGET IGN TIM ADJ*
●
IDLE CONDITION
When adjusting target ignition tim-
ing
WORK ITEM
CONDITION
USAGE
Freeze frame data
item*
Description
DIAG TROUBLE
CODE
[PXXXX]
●
The engine control component part/control system has a trouble code, it is displayed as “PXXXX”. (Refer
to
.)
FUEL SYS-B1
●
“Fuel injection system status” at the moment a malfunction is detected is displayed.
●
One mode in the following is displayed.
“Mode2”: Open loop due to detected system malfunction
“Mode3”: Open loop due to driving conditions (power enrichment, deceleration enleanment)
“Mode4”: Closed loop - using oxygen sensor(s) as feedback for fuel control
“Mode5”: Open loop - has not yet satisfied condition to go to closed loop
FUEL SYS-B2
CAL/LD VALUE [%]
●
The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [
°
C]
or [
°
F]
●
The engine coolant temperature at the moment a malfunction is detected is displayed.
L-FUEL TRM-B1 [%]
●
“Long-term fuel trim” at the moment a malfunction is detected is displayed.
●
The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule
than short-term fuel trim.
L-FUEL TRM-B2 [%]
S-FUEL TRM-B1 [%]
●
“Short-term fuel trim” at the moment a malfunction is detected is displayed.
●
The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule.
S-FUEL TRM-B2 [%]
ENGINE SPEED
[rpm]
●
The engine speed at the moment a malfunction is detected is displayed.
VEHICL SPEED [km/
h] or [mph]
●
The vehicle speed at the moment a malfunction is detected is displayed.
EC-130
TROUBLE DIAGNOSIS
2005 Pathfinder
*: The items are the same as those of 1st trip freeze frame data.
B/FUEL SCHDL
[msec]
●
The base fuel schedule at the moment a malfunction is detected is displayed.
INT/A TEMP SE [
°
C]
or [
°
F]
●
The intake air temperature at the moment a malfunction is detected is displayed.
Freeze frame data
item*
Description
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