Nissan Pathfinder (2005 year). Manual - part 161

TROUBLE DIAGNOSIS

EC-139

2005 Pathfinder

Operation

“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

GI-27, "How to Perform Effi-

cient Diagnosis for an Electrical Incident"

“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 manual.

PBIB0197E

SEF139P

EC-140

TROUBLE DIAGNOSIS

2005 Pathfinder

FUNCTION

INSPECTION PROCEDURE

Turn ignition switch OFF.

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

Trip Freeze Frame Data"

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

2005 Pathfinder

Turn ignition switch ON.

Enter the program according to instruction on the screen or in
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)

Perform each diagnostic mode according to each service proce-
dure.
For further information, see the GST Operation Manual 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

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*

●

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*

●

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

→

OFF

→

OFF

CLSD THL POS

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

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.)

P/N POSI SW

●

Ignition switch: ON

Shift lever: P or N

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.

LOAD SIGNAL

●

Ignition switch: ON

Rear window defogger switch is ON
and/or lighting switch is in 2nd

Rear window defogger switch is OFF
and lighting switch is OFF

OFF

TROUBLE DIAGNOSIS

EC-143

2005 Pathfinder

IGNITION SW

●

Ignition switch: ON

→

OFF

→

OFF

→

HEATER FAN SW

●

Engine: After warming up, idle
the engine

Heater fan: Operating.

Heater fan: Not operating

OFF

BRAKE SW

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

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

- 18

BTDC

2,000 rpm

- 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)

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

2,000 rpm

Approx. 0

- 30

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

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)

FUEL PUMP RLY

●

For 1 second after turning ignition switch ON

●

Engine running or cranking

●

Except above conditions

OFF

VENT CONT/V

●

Ignition switch: ON

OFF

THRTL RELAY

●

Ignition switch: 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

(207

F) or less

OFF

Engine coolant temperature: Between
98

C (208

F) and 104

C (219

LOW

Engine coolant temperature: 105

(221

F) or more

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

●

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

MAIN switch: Released

OFF

CANCEL SW

●

Ignition switch: ON

CANCEL switch: Pressed

CANCEL switch: Released

OFF

RESUME/ACC SW

●

Ignition switch: ON

RESUME/ACCELERATE switch:
Pressed

RESUME/ACCELERATE switch:
Released

OFF

SET SW

●

Ignition switch: ON

SET/COAST switch: Pressed

SET/COAST switch: Released

OFF

BRAKE SW1

●

Ignition switch: ON

Brake pedal: Fully released

Brake pedal: Slightly depressed

OFF

BRAKE SW2

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

CRUISE LAMP

●

Ignition switch: ON

MAIN switch: pressed at the 1st time

→

at the 2nd time

→

OFF

SET LAMP

●

MAIN switch: ON

●

When vehicle speed is between
40km/h (25MPH) and 144km/h
(89MPH)

ASCD: Operating

ASCD: Not operating

OFF

ALT DUTY

●

Engine: Idle

0 - 80%

MONITOR ITEM

CONDITION

SPECIFICATION

TROUBLE DIAGNOSIS

EC-145

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*

●

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

●

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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