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Nissan Pathfinder (2007 year). Manual - part 152

TROUBLE DIAGNOSIS

EC-83

2007 Pathfinder

WORK FLOW
Overall Sequence

PBIB2267E

EC-84

TROUBLE DIAGNOSIS

2007 Pathfinder

Detailed Flow

GET INFORMATION FOR SYMPTOM

Get the detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurred) using the

EC-86, "DIAGNOSTIC WORKSHEET"

>> GO TO 2.

CHECK DTC*

Check DTC*

Perform the following procedure if DTC*

is displayed.

–

Record DTC*

and freeze frame data*

. (Print them out with CONSULT-II or GST.)

–

Erase DTC*

. (Refer to

EC-60, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"

–

Study the relationship between the cause detected by DTC*

and the symptom described by the cus-

tomer. (Symptom Matrix Chart is useful. Refer to

EC-91

Check related service bulletins for information.

Is any symptom described and any DTC detected?

Symptom is described, DTC*

is displayed>>GO TO 3.

Symptom is described, DTC*

is not displayed>>GO TO 4.

Symptom is not described, DTC*

is displayed>>GO TO 5.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer (except MIL ON).
DIAGNOSIS WORK SHEET is useful to verify the incident.
Connect CONSULT-II to the vehicle in “DATA MONITOR (AUTO TRIG)” mode and check real time diagnosis
results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
DIAGNOSIS WORK SHEET is useful to verify the incident.
Connect CONSULT-II to the vehicle in “DATA MONITOR (AUTO TRIG)” mode and check real time diagnosis
results.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6.

TROUBLE DIAGNOSIS

EC-85

2007 Pathfinder

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC Confirmation Procedure for the displayed DTC*

, and then make sure that DTC*

is detected

again.
At this time, always connect CONSULT-II to the vehicle, and check diagnostic results in real time on “DATA
MONITOR (AUTO TRIG)”.
If two or more DTCs*

are detected, refer to

EC-88, "DTC Inspection Priority Chart"

and determine trouble

diagnosis order.

NOTE:

●

Freeze frame data*

is useful if the DTC*

is not detected.

●

Perform Overall Function Check if DTC Confirmation Procedure is not included on Service Manual. This

simplified check procedure is an effective alternative though DTC*

cannot be detected during this

check.
If the result of Overall Function Check is NG, it is the same as the detection of DTC*

by DTC Confirma-

tion Procedure.

Is DTC*

detected?

Yes

>> GO TO 10.

>> Check according to

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

PERFORM BASIC INSPECTION

Perform

EC-70, "Basic Inspection"

With CONSULT-II>>GO TO 7.
Without CONSULT-II>>GO TO 9.

PERFORM DATA MONITOR (SPEC) MODE

With CONSULT-II

Make sure that “MAS A/F SE-B1”, “B/FUEL SCHDL”, and “A/F
ALPHA-B1”, “A/F ALPHA-B2” are within the SP value using CON-
SULT-II “DATA MONITOR (SPEC)” mode. Refer to

EC-136, "Diag-

nostic Procedure"

Are they within the SP value?

Yes

>> GO TO 9.

>> GO TO 8.

DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Detect malfunctioning part according to

EC-135, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

Is malfunctioning part detected?

Yes

>> GO TO 11.

>> GO TO 9.

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM MATRIX CHART

Detect malfunctioning system according to

EC-91, "Symptom Matrix Chart"

based on the confirmed symp-

tom in step 4, and determine the trouble diagnosis order based on possible causes and symptom.

>> GO TO 10.

SEF601Z

EC-86

TROUBLE DIAGNOSIS

2007 Pathfinder

10.

DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE

Inspect according to Diagnostic Procedure of the system.

NOTE:
The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in

GI-

27, "How to Perform Efficient Diagnosis for an Electrical Incident"

Is malfunctioning part detected?

Yes

>> GO TO 11.

>> Monitor input data from related sensors or check voltage of related ECM terminals using CON-

SULT-II. Refer to

EC-129, "CONSULT-II Reference Value in Data Monitor"

EC-105, "ECM Termi-

nals and Reference Value"

11.

REPAIR OR REPLACE THE MALFUNCTIONING PART

Repair or replace the malfunctioning part.

Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.

Check DTC. If DTC is displayed, erase it, refer to

EC-60, "HOW TO ERASE EMISSION-RELATED DIAG-

NOSTIC INFORMATION"

>> GO TO 12.

12.

FINAL CHECK

When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,
and then make sure that the malfunction have been repaired securely.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and make sure
that the symptom is not detected.

OK or NG

NG (DTC*

is detected)>>GO TO 10.

NG (Symptom remains)>>GO TO 6.
OK

>> 1. Before returning the vehicle to the customer, make sure to erase unnecessary DTC*

in ECM

and TCM (Transmission Control Module). (Refer to

EC-60, "HOW TO ERASE EMISSION-

RELATED DIAGNOSTIC INFORMATION"

and

AT-40, "HOW TO ERASE DTC"

2. If the completion of SRT is needed, drive vehicle under the specific driving pattern. Refer to

EC-

57, "Driving Pattern"

3. INSPECTION END

*1: Include 1st trip DTC.
*2: Include 1st trip freeze frame data.

DIAGNOSTIC WORKSHEET
Description

There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about a incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the one on the next page in order
to organize all the information for troubleshooting.
Some conditions may cause the MIL to come on steady or blink and
DTC to be detected. Examples:

●

Vehicle ran out of fuel, which caused the engine to misfire.

●

Fuel filler cap was left off or incorrectly screwed on, allowing fuel
to evaporate into the atmosphere.

SEF907L

TROUBLE DIAGNOSIS

EC-87

2007 Pathfinder

Worksheet Sample

LEC031A

EC-88

TROUBLE DIAGNOSIS

2007 Pathfinder

DTC Inspection Priority Chart

UBS00K44

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

NOTE:

●

If DTC U1000 and/or U1001 is displayed with other DTC, first perform the trouble diagnosis for
DTC U1000, U1001. Refer to

EC-154, "DTC U1000, U1001 CAN COMMUNICATION LINE"

●

If dtc U1010 is displayed with other DTC, first perform the trouble diagnosis for DTC U1010. Refer
to

EC-157, "DTC U1010 CAN COMMUNICATION"

Priority

Detected items (DTC)

●

U1000 U1001 CAN communication line

●

P0101 P0102 P0103 Mass air flow sensor

●

P0112 P0113 P0127 Intake air temperature sensor

●

P0117 P0118 P0125 Engine coolant temperature sensor

●

P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor

●

P0128 Thermostat function

●

P0181 P0182 P0183 Fuel tank temperature sensor

●

P0327 P0328 P0332 P0333 Knock sensor

●

P0335 Crankshaft position sensor (POS)

●

P0340 P0345 Camshaft position sensor (PHASE)

●

P0460 P0461 P0462 P0463 Fuel level sensor

●

P0500 Vehicle speed sensor

●

P0605 ECM

●

P0643 Sensor power supply

●

P0700 TCM

●

P0705 P0850 Park/Neutral position (PNP) switch

●

P1550 P1551 P1552 P1553 P1554 Battery current sensor

●

P1610 - P1615 NATS

●

P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor

TROUBLE DIAGNOSIS

EC-89

2007 Pathfinder

●

P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater

●

P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater

●

P0075 P0081 Intake valve timing control solenoid valve

●

P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1

●

P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2

●

P0441 EVAP control system purge flow monitoring

●

P0443 P0444 P0445 EVAP canister purge volume control solenoid valve

●

P0447 P0448 EVAP canister vent control valve

●

P0451 P0452 P0453 EVAP control system pressure sensor

●

P0550 Power steering pressure sensor

●

P0603 ECM power supply

●

P0710 P0717 P0720 P0740 P0744 P0745 P1730 P1752 P1754 P1757 P1759 P1762 P1764 P1767 P1769 P1772
P1774 A/T related sensors, solenoid valves and switches

●

P1217 Engine over temperature (OVERHEAT)

●

P1800 VIAS control solenoid valve

●

P1805 Brake switch

●

P2100 P2103 P2118 Electric throttle control actuator

●

P2101 Electric throttle control function

●

P0011 P0021 Intake valve timing control

●

P0171 P0172 P0174 P0175 Fuel injection system function

●

P0300 - P0306 Misfire

●

P0420 P0430 Three way catalyst function

●

P0442 P0455 P0456 EVAP control system

●

P0506 P0507 Idle speed control system

●

P1148 P1168 Closed loop control

●

P1211 TCS control unit

●

P1212 TCS communication line

●

P1421 Cold start control

●

P1564 ASCD steering switch

●

P1572 ASCD brake switch

●

P1574 ASCD vehicle speed sensor

●

P2119 Electric throttle control actuator

Priority

Detected items (DTC)

EC-90

TROUBLE DIAGNOSIS

2007 Pathfinder

Fail-safe Chart

UBS00K45

When the DTC listed below is detected, the ECM enters fail-safe mode and the MIL lights up.

●

When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when
there is malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected
as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by
means of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands
the driver to repair the malfunction.

DTC No.

Detected items

Engine operating condition in fail-safe mode

P0102
P0103

Mass air flow sensor circuit

Engine speed will not rise more than 2,400 rpm due to the fuel cut.

P0117
P0118

Engine coolant tempera-
ture sensor circuit

Engine coolant temperature will be determined by ECM based on the time after turning
ignition switch ON or START.
CONSULT-II displays the engine coolant temperature decided by ECM.

Condition

Engine coolant temperature decided

(CONSULT-II display)

Just as ignition switch is turned
ON or START

C (104

More than approx. 4 minutes after
ignition ON or START

C (176

Except as shown above

40 - 80

C (104 - 176

(Depends on the time)

When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.

P0122
P0123
P0222
P0223
P2135

Throttle position sensor

The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.

P0643

Sensor power supply

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2100
P2103

Throttle control motor relay

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2101

Electric throttle control
function

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2118

Throttle control motor

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2119

Electric throttle control
actuator

(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.

(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.

(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops,
the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or
more.

P2122
P2123
P2127
P2128
P2138

Accelerator pedal position
sensor

Engine operating condition in fail-safe mode

Engine speed will not rise more than 2,500 rpm due to the fuel cut

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