Nissan Pathfinder (2007 year). Manual - part 158

TROUBLE DIAGNOSIS

EC-131

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2007 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: 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

●

Engine: Idle

●

Both A/C switch blower fan switch: ON (Compressor operates)

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

EC-132

TROUBLE DIAGNOSIS

2007 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

●

Engine speed: Idle

●

Battery: Fully charged*

2

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

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

TROUBLE DIAGNOSIS

EC-133

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2007 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

PBIB2445E

EC-134

TROUBLE DIAGNOSIS

2007 Pathfinder

PBIB2099E

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-135

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2007 Pathfinder

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

PFP:00031

Description

UBS00K4G

The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:

●

B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)

●

A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

●

MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing Condition

UBS00K4H

●

Vehicle driven distance: More than 5,000 km (3,107 miles)

●

Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

2

  , 14.25 - 15.12 psi)

●

Atmospheric temperature: 20 - 30

°

C (68 - 86

°

F)

●

Engine coolant temperature: 75 - 95

°

C (167 - 203

°

F)

●

Transmission: Warmed-up*

1

●

Electrical load: Not applied*

2

●

Engine speed: Idle

*1: After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE” (A/T
fluid temperature sensor signal) indicates more than 60

°

C (140

°

F).

*2: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.

Inspection Procedure

UBS00K4I

NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.

1.

Perform 

EC-70, "Basic Inspection"

  .

2.

Confirm that the testing conditions indicated above are met.

3.

Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2”
and “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode with
CONSULT-II.

4.

Make sure that monitor items are within the SP value.

5.

If NG, go to 

EC-136, "Diagnostic Procedure"

  .

SEF601Z

EC-136

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

2007 Pathfinder

Diagnostic Procedure

UBS00K4J

OVERALL SEQUENCE

PBIB2268E

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-137

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2007 Pathfinder

PBIB3214E

EC-138

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

2007 Pathfinder

DETAILED PROCEDURE

1. 

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1.

Start engine.

2.

Confirm that the testing conditions are met. Refer to 

EC-135, "Testing Condition"

  .

3.

Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “DATA MONITOR
(SPEC)” mode, and make sure that the each indication is within
the SP value.

NOTE:
Check “A/F ALPHA-B1”, “A/F ALPHA-B2” for approximately 1
minute because they may fluctuate. It is NG if the indication is
out of the SP value even a little.

OK or NG

OK

>> GO TO 17.

NG (Less than the SP value)>>GO TO 2.
NG (More than the SP value)>>GO TO 3.

2. 

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.

OK or NG

OK

>> GO TO 4.

NG (More than the SP value)>>GO TO 19.

3. 

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.

OK or NG

OK

>> GO TO 6.

NG (More than the SP value)>>GO TO 6.
NG (Less than the SP value)>>GO TO 25.

4. 

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1.

Stop the engine.

2.

Disconnect PCV hose, and then plug it.

3.

Start engine.

4.

Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “DATA MONITOR (SPEC)” mode, and make sure that the
each indication is within the SP value.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 6.

PBIB2369E

PBIB2332E

PBIB2332E