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Nissan Pathfinder (2012 year). Instruction - part 576

ON BOARD DIAGNOSTIC (OBD) SYSTEM

TM-35

< SYSTEM DESCRIPTION >

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Introduction

INFOID:0000000007357102

The A/T system has two self-diagnostic systems.

The first is the emission-related on board diagnostic system (OBD-II) performed by the TCM in combination

with the ECM. The malfunction is indicated by the MIL (malfunction indicator lamp) and is stored as a DTC in

the ECM memory but not the TCM memory.

The second is the TCM original self-diagnosis indicated by the A/T CHECK indicator lamp. The malfunction is

stored in the TCM memory. The detected items are overlapped with OBD-II self-diagnostic items. For detail,

refer to

TM-37, "CONSULT Function (TRANSMISSION)"

OBD-II Function for A/T System

INFOID:0000000007357103

The ECM provides emission-related on board diagnostic (OBD-II) functions for the A/T system. One function

is to receive a signal from the TCM used with OBD-related parts of the A/T system. The signal is sent to the

ECM when a malfunction occurs in the corresponding OBD-related part. The other function is to indicate a

diagnostic result by means of the MIL (malfunction indicator lamp) on the instrument panel. Sensors, switches

and solenoid valves are used as sensing elements.

The MIL automatically illuminates in One or Two Trip Detection Logic when a malfunction is sensed in relation

to A/T system parts.

One or Two Trip Detection Logic of OBD-II

INFOID:0000000007357104

ONE TRIP DETECTION LOGIC

If a malfunction is sensed during the first test drive, the MIL will illuminate and the malfunction will be stored in

the ECM memory as a DTC. The TCM is not provided with such a memory function.

TWO TRIP DETECTION LOGIC

When a malfunction is sensed during the first test drive, it is stored in the ECM memory as a 1st trip DTC

(diagnostic trouble code) or 1st trip freeze frame data. At this point, the MIL will not illuminate. — 1st Trip

If the same malfunction as that experienced during the first test drive is sensed during the second test drive,

the MIL will illuminate. — 2nd Trip

The “Trip” in the “One or Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed

during vehicle operation.

OBD-II Diagnostic Trouble Code (DTC)

INFOID:0000000007357105

HOW TO READ DTC AND 1ST TRIP DTC

DTC and 1st trip DTC can be read by the following methods.

( with CONSULT or GST)

CONSULT or GST (Generic Scan Tool) Examples: P0705, P0720 etc.

These DTC are prescribed by SAE J2012.

(CONSULT also displays the malfunctioning component or system.)

•

1st trip DTC No. is the same as DTC No.

•

Output of the diagnostic trouble code indicates that the indicated circuit has a malfunction. How-

ever, in case of the Mode II and GST, they do not indicate whether the malfunction is still occurring or

occurred in the past and returned to normal.

CONSULT can identify them as shown below, therefore, CONSULT (if available) is recommended.

Freeze Frame Data and 1st Trip Freeze Frame Data

The ECM has a memory function, which stores the driving condition such as fuel system status, calculated

load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed and vehicle

speed at the moment the ECM detects a malfunction.

Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data,

and the data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT or

GST. The 1st trip freeze frame data can only be displayed on the CONSULT screen, not on the GST. For

detail, refer to

TM-35

Only one set of freeze frame data (either 1st trip freeze frame data of freeze frame data) can be stored in the

ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority

for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once

freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no

August 2012

2012 Pathfinder

TM-36

< SYSTEM DESCRIPTION >

ON BOARD DIAGNOSTIC (OBD) SYSTEM

longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the fol-

lowing priorities to update the data.

Both 1st trip freeze frame data and freeze frame data (along with the DTC) are cleared when the ECM mem-

ory is erased.

HOW TO ERASE DTC

The diagnostic trouble code can be erased by CONSULT, GST or ECM DIAGNOSTIC TEST MODE as

described following.

•

If the battery cable is disconnected, the diagnostic trouble code will be lost within 24 hours.

•

When you erase the DTC, using CONSULT or GST is easier and quicker than switching the mode

selector on the ECM.

The following emission-related diagnostic information is cleared from the ECM memory when erasing DTC

related to OBD-II. For details, refer to

EC-74, "On Board Diagnosis Function"

(VQ40DE),

EC-530, "On Board

Diagnosis Function"

(VK56DE).

•

Diagnostic trouble codes (DTC)

•

1st trip diagnostic trouble codes (1st trip DTC)

•

Freeze frame data

•

1st trip freeze frame data

•

System readiness test (SRT) codes

•

Test values

HOW TO ERASE DTC (WITH CONSULT)

1. The emission related diagnostic information in the TCM and ECM can be erased by selecting “ALL Erase”

in the “Description” of “FINAL CHECK” mode with CONSULT.

HOW TO ERASE DTC (WITH GST)

1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least

10 seconds and then turn it “ON” (engine stopped) again.

2. Select Mode 4 with the Generic Scan Tool (GST). For details refer to

EC-66, "GST (Generic Scan Tool)"

(VQ40DE),

EC-522, "GST (Generic Scan Tool)"

(VK56DE).

HOW TO ERASE DTC (NO TOOLS)

1. Disconnect battery for 24 hours.
2. Reconnect battery.

Malfunction Indicator Lamp (MIL)

INFOID:0000000007357106

DESCRIPTION

The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned “ON” with-

out the engine running. This is a bulb check.

• If the MIL does not light up, refer to

MWI-19, "WARNING LAMPS/

INDICATOR LAMPS : System Diagram"

2. When the engine is started, the MIL should go off.

If the MIL remains on, the on board diagnostic system has

detected an engine system malfunction.

Priority

Items

Freeze frame data

Misfire — DTC: P0300 - P0306
Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175

Except the above items (Includes A/T related items)

1st trip freeze frame data

SEF217U

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2012 Pathfinder

DIAGNOSIS SYSTEM (TCM)

TM-37

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (TCM)

CONSULT Function (TRANSMISSION)

INFOID:0000000007357107

FUNCTION

*: Although “Function Test” is selectable, do not use it.

SELF-DIAGNOSTIC RESULT MODE

Display Items List

X: Applicable, —: Not applicable

TCM diagnostic mode

Description

Self Diagnostic Result

Retrieve DTC from ECU and display diagnostic items.

Data Monitor

Monitor the input/output signal of the control unit in real time.

CAN Diagnosis

The condition of CAN communication can be indicated by a topology.

CAN Diagnosis Support Monitor

It monitors the status of CAN communication.

DTC & SRT Confirmation

The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

Function Test*

This mode can show results of self-diagnosis of ECU with either “OK” or “NG”. For engines, more
practical tests regarding sensors/switches and/or actuators are available.

ECU Identification

Display the ECU identification number (part number etc.) of the selected system.

Items (CONSULT

screen terms)

Malfunction is detected when...

TCM

self-diagnosis

OBD-II (DTC)

Reference

page

“TRANSMISSION”

with CONSULT

MIL indicator
lamp*1, “EN-

GINE” with

CONSULT or

GST

CAN COMM CIRCUIT

• When TCM is not transmitting or receiving CAN com-

munication signal for 2 seconds or more.

U1000

TM-47

STARTER RELAY

• If this signal is ON other than in “P” or “N” position,

this is judged to be a malfunction.
(And if it is OFF in “P” or “N” position, this too is
judged to be a malfunction.)

P0615

—

TM-48

TRANSMISSION
CONT

• TCM is malfunctioning.

P0700

TM-50

T/M RANGE SENSOR
A

• Transmission range switch 1-4 signals input with im-

possible pattern

• “P” position is detected from “N” position without any

other position being detected in between.

P0705

TM-51

INPUT SPEED SEN-
SOR A

• TCM does not receive the proper voltage signal from

the sensor.

• TCM detects an irregularity only at position of 4GR

for input speed sensor 2.

P0717

TM-53

OUTPUT SPEED SEN-
SOR

• Signal from output speed sensor not input due to cut

line or the like

• Unexpected signal input during running
• After ignition switch is turned ON, unexpected signal

input from vehicle speed sensor MTR before the ve-
hicle starts moving

P0720

TM-55

ENGINE SPEED

• TCM does not receive the CAN communication sig-

nal from the ECM.

P0725

—

TM-58

1GR INCORRECT RA-
TIO

• A/T cannot shift to 1GR

P0731

TM-61

2GR INCORRECT RA-
TIO

• A/T cannot shift to 2GR

P0732

TM-63

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TM-38

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (TCM)

3GR INCORRECT RA-
TIO

• A/T cannot shift to 3GR

P0733

TM-65

4GR INCORRECT RA-
TIO

• A/T cannot shift to 4GR

P0734

TM-67

5GR INCORRECT RA-
TIO

• A/T cannot shift to 5GR

P0735

TM-69

TORQUE CONVERT-
ER

• Normal voltage not applied to solenoid due to cut

line, short, or the like

P0740

TM-70

TORQUE CONVERT-
ER

• A/T cannot perform lock-up even if electrical circuit is

good.

• TCM detects as irregular by comparing difference

value with slip rotation.

P0744

P0744*2

TM-72

PC SOLENOID A

• Normal voltage not applied to solenoid due to cut

line, short, or the like

• TCM detects as irregular by comparing target value

with monitor value.

P0745

TM-74

TP SENSOR

• TCM does not receive the proper accelerator pedal

position signals (input by CAN communication) from
ECM.

P1705

—

TM-76

TRANS FLUID TEMP
SEN

• During running, the ATF temperature sensor signal

voltage is excessively high or low

P1710

P0710

TM-78

VEHICLE SPEED SIG-
NAL

• Signal (CAN communication) from vehicle speed

sensor MTR not input due to cut line or the like

• Unexpected signal input during running

P1721

—

TM-80

INTERLOCK

• Except during shift change, the gear position and

ATF pressure switch states are monitored and com-
parative judgment made.

P1730

TM-82

1GR E/BRAKING

• Each ATF pressure switch and solenoid current is

monitored and if a pattern is detected having engine
braking 1st gear other than in the “1” position, a mal-
function is detected.

P1731

—

TM-84

INPUT CLUTCH SOL

• Normal voltage not applied to solenoid due to func-

tional malfunction, cut line, short, or the like

• TCM detects as irregular by comparing target value

with monitor value.

P1752

TM-86

FR BRAKE SOLENOID

• Normal voltage not applied to solenoid due to func-

tional malfunction, cut line, short, or the like

• TCM detects as irregular by comparing target value

with monitor value.

P1757

TM-88

DRCT CLUTCH SOL

• Normal voltage not applied to solenoid due to cut

line, short, or the like

• TCM detects as irregular by comparing target value

with monitor value.

P1762

TM-90

HLR CLUTCH SOLE-
NOID

• Normal voltage not applied to solenoid due to func-

tional malfunction, cut line, short, or the like

• TCM detects as irregular by comparing target value

with monitor value.

P1767

TM-92

L C BRAKE SOLENOID

• Normal voltage not applied to solenoid due to func-

tional malfunction, cut line, short, or the like

P1772

TM-94

Items (CONSULT

screen terms)

Malfunction is detected when...

TCM

self-diagnosis

OBD-II (DTC)

Reference

page

“TRANSMISSION”

with CONSULT

MIL indicator
lamp*1, “EN-

GINE” with

CONSULT or

GST

August 2012

2012 Pathfinder

DIAGNOSIS SYSTEM (TCM)

TM-39

< SYSTEM DESCRIPTION >

*1: Refer to

TM-36, "Malfunction Indicator Lamp (MIL)"

*2:These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
*3:With instruction mode.

DATA MONITOR MODE

Display Items List

X: Standard, —: Not applicable, : Option

L C BRAKE SOLENOID

• TCM detects an improper voltage drop when it tries

to operate the solenoid valve.

• Condition of ATF pressure switch 2 is different from

monitor value, and relation between gear position
and actual gear ratio is irregular.

P1774

P1774*2

TM-96

M-MODE SWITCH *3

• When an impossible pattern of switch signals is de-

tected, a malfunction is detected.

P1815

—

TM-98

NO DTC IS DETECTED
FURTHER TESTING
MAY BE REQUIRED

• No NG item has been detected.

—

Items (CONSULT

screen terms)

Malfunction is detected when...

TCM

self-diagnosis

OBD-II (DTC)

Reference

page

“TRANSMISSION”

with CONSULT

MIL indicator
lamp*1, “EN-

GINE” with

CONSULT or

GST

Monitored item (Unit)

Monitor Item Selection

Remarks

ECU IN-

PUT SIG-

NALS

MAIN SIG-

NALS

SELEC-

TION

FROM
MENU

VHCL/S SE-A/T (km/h or mph)

Output speed sensor

VHCL/S SE-MTR (km/h or mph)

—

ACCELE POSI (0.0/8)

—

Accelerator pedal position signal

THROTTLE POSI (0.0/8)

Degree of opening for accelerator recognized by
the TCM
For fail-safe operation, the specific value used
for control is displayed.

CLSD THL POS (ON-OFF display)

—

Signal input with CAN communications

W/O THL POS (ON-OFF display)

—

BRAKESW (ON-OFF display)

—

Stop lamp switch

GEAR

—

Gear position recognized by the TCM updated
after gear-shifting

ENGINE SPEED (rpm)

INPUT SPEED (rpm)

OUTPUT REV (rpm)

GEAR RATIO

—

TC SLIP SPEED (rpm)

—

Difference between engine speed and torque
converter input shaft speed

F SUN GR REV (rpm)

—

F CARR GR REV (rpm)

—

ATF TEMP SE 1 (V)

—

August 2012

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TM-40

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (TCM)

ATF TEMP 1 (

C or

—

ATF TEMP 2 (

C or

—

BATTERY VOLT (V)

—

ATF PRES SW 1 (ON-OFF display)

Not mounted but displayed.

ATF PRES SW 2 (ON-OFF display)

(for LC/B solenoid)

ATF PRES SW 3 (ON-OFF display)

Not mounted but displayed.

ATF PRES SW 5 (ON-OFF display)

ATF PRES SW 6 (ON-OFF display)

RANGE SW 1 (ON-OFF display)

—

RANGE SW 2 (ON-OFF display)

—

RANGE SW 3 (ON-OFF display)

—

RANGE SW 4 (ON-OFF display)

—

1 POSITION SW (ON-OFF display)

—

1st position switch

SLCT LVR POSI

—

Selector lever position is recognized by the TCM.
For fail-safe operation, the specific value used
for control is displayed.

OD CONT SW (ON-OFF display)

—

POWERSHIFT SW (ON-OFF display)

—

Not mounted but displayed.

HOLD SW (ON-OFF display)

—

DS RANGE (ON-OFF display)

—

MANU MODE SW (ON-OFF display)

—

NON M-MODE SW (ON-OFF display)

—

UP SW LEVER (ON-OFF display)

—

DOWN SW LEVER (ON-OFF display)

—

SFT UP ST SW (ON-OFF display)

—

Not mounted but displayed.

SFT DWN ST SW (ON-OFF display)

—

ASCD-OD CUT (ON-OFF display)

—

ASCD-CRUISE (ON-OFF display)

—

ABS SIGNAL (ON-OFF display)

—

ACC OD CUT (ON-OFF display)

—

Not mounted but displayed.

ACC SIGNAL (ON-OFF display)

—

TCS GR/P KEEP (ON-OFF display)

—

TCS SIGNAL 2 (ON-OFF display)

—

TCS SIGNAL 1 (ON-OFF display)

—

TCC SOLENOID (A)

—

LINE PRES SOL (A)

—

Monitored item (Unit)

Monitor Item Selection

Remarks

ECU IN-

PUT SIG-

NALS

MAIN SIG-

NALS

SELEC-

TION

FROM
MENU

August 2012

2012 Pathfinder

DIAGNOSIS SYSTEM (TCM)

TM-41

< SYSTEM DESCRIPTION >

I/C SOLENOID (A)

—

FR/B SOLENOID (A)

—

D/C SOLENOID (A)

—

HLR/C SOL (A)

—

ON OFF SOL (ON-OFF display)

—

LC/B solenoid

TCC SOL MON (A)

—

L/P SOL MON (A)

—

I/C SOL MON (A)

—

FR/B SOL MON (A)

—

D/C SOL MON (A)

—

HLR/C SOL MON (A)

—

ON OFF SOL MON (ON-OFF display)

—

LC/B solenoid

P POSI IND (ON-OFF display)

—

R POSI IND (ON-OFF display)

—

N POSI IND (ON-OFF display)

—

D POSI IND (ON-OFF display)

—

4TH POSI IND (ON-OFF display)

—

3RD POSI IND (ON-OFF display)

—

2ND POSI IND (ON-OFF display)

—

1ST POSI IND (ON-OFF display)

—

MANU MODE IND (ON-OFF display)

—

POWER M LAMP (ON-OFF display)

—

F-SAFE IND/L (ON-OFF display)

—

ATF WARN LAMP (ON-OFF display)

—

BACK-UP LAMP (ON-OFF display)

—

STARTER RELAY (ON-OFF display)

—

RANGE SW 3M (ON-OFF display)

—

C/V CLB ID1

—

C/V CLB ID2

—

C/V CLB ID3

—

UNIT CLB ID1

—

UNIT CLB ID2

—

UNIT CLB ID3

—

TRGT GR RATIO

—

TRGT PRES TCC (kPa, kg/cm

or psi)

—

Monitored item (Unit)

Monitor Item Selection

Remarks

ECU IN-

PUT SIG-

NALS

MAIN SIG-

NALS

SELEC-

TION

FROM
MENU

August 2012

2012 Pathfinder

TM-42

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (TCM)

DTC & SRT CONFIRMATION

DTC Work Support Mode

Diagnosis Procedure without CONSULT

INFOID:0000000007357108

OBD-II SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)

Refer to

EC-74, "On Board Diagnosis Function"

(VQ40DE) or

EC-530, "On Board Diagnosis Function"

(VK56DE).

TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS) — WITH MANUAL MODE

Description

TRGT PRES L/P (kPa, kg/cm

or psi)

—

TRGT PRES I/C (kPa, kg/cm

or psi)

—

TRGT PRE FR/B (kPa, kg/cm

or psi)

—

TRGT PRES D/C (kPa, kg/cm

or psi)

—

TRG PRE HLR/C (kPa, kg/cm

or psi)

—

SHIFT PATTERN

—

DRV CST JUDGE

—

START RLY MON (ON-OFF display)

—

NEXT GR POSI

—

SHIFT MODE

—

MANU GR POSI

—

VEHICLE SPEED (km/h or mph)

—

Vehicle speed recognized by the TCM.

Monitored item (Unit)

Monitor Item Selection

Remarks

ECU IN-

PUT SIG-

NALS

MAIN SIG-

NALS

SELEC-

TION

FROM
MENU

DTC work support item

Description

Check item

1ST GR FNCTN P0731

Following items for “1GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed

or not)

• Self-diagnostic results (OK or NG)

• Input clutch solenoid valve
• Front brake solenoid valve
• Direct clutch solenoid valve
• High and low reverse clutch

solenoid valve

• Each clutch and brake
• Hydraulic control circuit

2ND GR FNCTN P0732

Following items for “2GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed

or not)

• Self-diagnostic results (OK or NG)

3RD GR FNCTN P0733

Following items for “3GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed

or not)

• Self-diagnostic results (OK or NG)

4TH GR FNCTN P0734

Following items for “4GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed

or not)

• Self-diagnostic results (OK or NG)

5TH GR FNCTN P0735

Following items for “5GR incorrect ratio” can be confirmed.
• Self-diagnosis status (whether the diagnosis is being performed

or not)

• Self-diagnostic results (OK or NG)

August 2012

2012 Pathfinder

Content .. 574 575 576 577 ..