Nissan Pathfinder (2005 year). Instruction — part 161
TROUBLE DIAGNOSIS
EC-139
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2005 Pathfinder
Operation
1.
“AUTO TRIG”
●
While trying to detect the DTC/1st trip DTC by performing the DTC Confirmation Procedure, be sure to
select to “DATA MONITOR (AUTO TRIG)” mode. You can confirm the malfunction at the moment it is
detected.
●
While narrowing down the possible causes, CONSULT-II should be set in “DATA MONITOR (AUTO
TRIG)” mode, especially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or twisting) the suspicious connectors, compo-
nents and harness in the DTC Confirmation Procedure, the moment a malfunction is found the DTC/1st
trip DTC will be displayed. (Refer to “INCIDENT SIMULATION TESTS” in
cient Diagnosis for an Electrical Incident"
.)
2.
“MANU TRIG”
●
If the malfunction is displayed as soon as “DATA MONITOR” is selected, reset CONSULT-II to “MANU
TRIG”. By selecting “MANU TRIG” you can monitor and store the data. The data can be utilized for fur-
ther diagnosis, such as a comparison with the value for the normal operating condition.
Generic Scan Tool (GST) Function
UBS00K4D
DESCRIPTION
Generic Scan Tool (OBDII scan tool) complying with SAE J1978 has
8 different functions explained below.
ISO9141 is used as the protocol.
The name GST or Generic Scan Tool is used in this service instruction.
PBIB0197E
SEF139P
EC-140
TROUBLE DIAGNOSIS
2005 Pathfinder
FUNCTION
INSPECTION PROCEDURE
1.
Turn ignition switch OFF.
2.
Connect GST to data link connector, which is located under LH
dash panel near the hood opener handle.
Diagnostic test mode
Function
Service $01
READINESS TESTS
This diagnostic service gains access to current emission-related data values, including
analog inputs and outputs, digital inputs and outputs, and system status information.
Service $02
(FREEZE DATA)
This diagnostic service gains access to emission-related data value which were stored by
ECM during the freeze frame. For details, refer to
EC-129, "Freeze Frame Data and 1st
.
Service $03
DTCs
This mode gains access to emission-related power train trouble codes which were stored
by ECM.
Service $04
CLEAR DIAG INFO
This diagnostic service can clear all emission-related diagnostic information. This
includes:
●
Clear number of diagnostic trouble codes (Service $01)
●
Clear diagnostic trouble codes (Service $03)
●
Clear trouble code for freeze frame data (Service $01)
●
Clear freeze frame data (Service $02)
●
Reset status of system monitoring test (Service $01)
●
Clear on board monitoring test results (Service $06 and Service $07)
Service $06
(ON BOARD TESTS)
This diagnostic service accesses the results of on board diagnostic monitoring tests of
specific components/systems that are not continuously monitored.
Service $07
(ON BOARD TESTS)
This diagnostic service enables the off board test drive to obtain test results for emission-
related power train components/systems that are continuously monitored during normal
driving conditions.
Service $08
—
This diagnostic service can close EVAP system in ignition switch ON position (Engine
stopped). When this diagnostic service is performed, EVAP canister vent control valve
open can be closed.
In the following conditions, this mode cannot function.
●
Low ambient temperature
●
Low battery voltage
●
Engine running
●
Ignition switch OFF
●
Low fuel temperature
●
Too much pressure is applied to EVAP system
Service $09
(CALIBRATION ID)
This diagnostic service enables the off-board test device to request specific vehicle infor-
mation such as Vehicle Identification Number (VIN) and Calibration IDs.
BBIA0538E
TROUBLE DIAGNOSIS
EC-141
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2005 Pathfinder
3.
Turn ignition switch ON.
4.
Enter the program according to instruction on the screen or in
the operation instruction.
(*: Regarding GST screens in this section, sample screens are
shown.)
5.
Perform each diagnostic mode according to each service proce-
dure.
For further information, see the GST Operation Instruction of
the tool maker.
SEF398S
SEF416S
EC-142
TROUBLE DIAGNOSIS
2005 Pathfinder
CONSULT-II Reference Value in Data Monitor
UBS00K4E
Remarks:
●
Specification data are reference values.
●
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 TIMING 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-II value with the tachometer indica-
tion.
Almost the same speed as the
tachometer indication.
MAS A/F SE-B1
See
EC-148, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
.
B/FUEL SCHDL
See
EC-148, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
.
A/F ALPHA-B1
A/F ALPHA-B2
See
EC-148, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
.
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 1.5 V
HO2S2 (B1)
HO2S2 (B2)
●
Warm-up condition
●
After keeping engine speed
between 3,500 and 4,000 rpm for
1 minute and at idle for 1 minute
under no load.
Revving engine from idle to 3,000 rpm
quickly
0 - 0.3V
←→
Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2)
●
Warm-up condition
●
After keeping engine speed
between 3,500 and 4,000 rpm for
1 minute and at idle for 1 minute
under no load.
Revving engine from idle to 3,000 rpm
quickly
LEAN
←→
RICH
VHCL SPEED SE
●
Turn drive wheels and compare CONSULT-II value with the speedometer
indication.
Almost the same speed as the
speedometer indication
BATTERY VOLT
●
Ignition switch: ON (Engine stopped)
11 - 14V
ACCEL SEN 1
●
Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.65 - 0.87V
Accelerator pedal: Fully depressed
More than 4.3V
ACCEL SEN 2*
1
●
Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.56 - 0.96V
Accelerator pedal: Fully depressed
More than 4.0V
THRTL SEN 1
THRTL SEN 2*
1
●
Ignition switch: ON
(Engine stopped)
●
Shift lever: D
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
EVAP SYS PRES
●
Ignition switch: ON
Approx. 1.8 - 4.8V
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
Shift lever: P or N
ON
Shift lever: Except above
OFF
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
TROUBLE DIAGNOSIS
EC-143
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2005 Pathfinder
IGNITION SW
●
Ignition switch: ON
→
OFF
→
ON
ON
→
OFF
→
ON
HEATER FAN SW
●
Engine: After warming up, idle
the engine
Heater fan: Operating.
ON
Heater fan: Not operating
OFF
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
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
●
Engine: After warming up
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
13
°
- 18
°
BTDC
2,000 rpm
25
°
- 45
°
BTDC
CAL/LD VALUE
●
Engine: After warming up
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
5% - 35%
2,500 rpm
5% - 35%
MASS AIRFLOW
●
Engine: After warming up
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
2.0 - 6.0 g·m/s
2,500 rpm
7.0 - 20.0 g·m/s
PURG VOL C/V
●
Engine: After warming up
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)
0%
2,000 rpm
—
INT/V TIM (B1)
INT/V TIM (B2)
●
Engine: After warming up
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
−
5
°
- 5
°
CA
2,000 rpm
Approx. 0
°
- 30
°
CA
INT/V SOL (B1)
INT/V SOL (B2)
●
Engine: After warming up
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 50%
VIAS S/V
●
Engine: After warming up
2,200 - 3,300 rpm
ON
Except above conditions
OFF
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
EC-144
TROUBLE DIAGNOSIS
2005 Pathfinder
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 104
°
C (219
°
F)
LOW
Engine coolant temperature: 105
°
C
(221
°
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
speedometer indication
VEHICLE SPEED
●
Turn drive wheels and compare the CONSULT-II value with speedometer
indication.
Almost the same speed as the
speedometer indication
TRVL AFTER MIL
●
Ignition switch: ON
Vehicle has traveled after MIL has
turned ON.
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
0 - 100%
AC PRESS SEN
●
Ignition switch: ON (Engine stopped)
Approx. 0V
●
Engine: Idle
●
Air conditioner switch: ON
1.0 - 4.0V
VHCL SPEED SE
●
Turn drive wheels and compare speedometer indication with the CON-
SULT-II value.
Almost the same speed as the
CONSULT-II value
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:
Released
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
●
When vehicle speed is between
40km/h (25MPH) and 144km/h
(89MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
ALT DUTY
●
Engine: Idle
0 - 80%
MONITOR ITEM
CONDITION
SPECIFICATION
TROUBLE DIAGNOSIS
EC-145
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2005 Pathfinder
*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 that the battery is fully charged. Refer to
SC-5, "SPECIFIC GRAVITY CHECK"
.
BAT CUR SEN
●
Battery: Fully charged*
2
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
Approx. 2,600 - 3,500mV
ALT DUTY SIG
●
Power generation voltage variable control: Operating
ON
●
Power generation voltage variable control: Not operating
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
EC-146
TROUBLE DIAGNOSIS
2005 Pathfinder
Major Sensor Reference Graph in Data Monitor Mode
UBS00K4F
The following are the major sensor reference graphs in “DATA MONITOR” mode.
CLSD THL POS, ACCEL SEN 1, THRTL SEN 1
Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch ON and with selector lever in D position.
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from ON to OFF.
ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), INJ PULSE-B1
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)” and “INJ PULSE-B1”
when revving engine quickly up to 4,800 rpm under no load after warming up engine sufficiently.
Each value is for reference, the exact value may vary.
PBIB0198E
SEF241Y
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