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Nissan Pathfinder (2008 year). Manual - part 586

TM-30

< FUNCTION DIAGNOSIS >

A/T CONTROL SYSTEM

A/T Electrical Parts Location

INFOID:0000000001282746

AWDIA0075GB

A/T SHIFT LOCK SYSTEM

TM-31

< FUNCTION DIAGNOSIS >

A/T SHIFT LOCK SYSTEM

System Description (With Manual Mode)

INFOID:0000000001282971

• The mechanical key interlock mechanism also operates as a shift lock:

With the ignition switch turned to ON, the selector lever cannot be shifted from “P” (parking) to any other
position unless the brake pedal is depressed.
With the key removed, the selector lever cannot be shifted from “P” to any other position.
The key cannot be removed unless the selector lever is placed in “P” position.

• The shift lock and key interlock mechanisms are controlled by the ON-OFF operation of the shift lock sole-

noid and by the operation of the rotator and slider located inside the key cylinder, respectively.

Shift Lock System Electrical Parts Location (With Manual Mode)

INFOID:0000000001282972

System Description (W/O Manual Mode)

INFOID:0000000001712153

• The mechanical key interlock mechanism also operates as a shift lock:

• The shift lock and key interlock mechanisms are controlled by the ON-OFF operation of the shift lock sole-

noid and by the operation of the rotator and slider located inside the key cylinder, respectively.

AWDIA0076GB

TM-32

< FUNCTION DIAGNOSIS >

A/T SHIFT LOCK SYSTEM

Shift Lock System Electrical Parts Location (W/O Manual Mode)

INFOID:0000000001712178

WCIA0528E

ON BOARD DIAGNOSTIC (OBD) SYSTEM

TM-33

< FUNCTION DIAGNOSIS >

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Introduction

INFOID:0000000001282738

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-35, "CONSULT-III Function (TRANSMISSION)"

OBD-II Function for A/T System

INFOID:0000000001282739

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:0000000001282740

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:0000000001282741

HOW TO READ DTC AND 1ST TRIP DTC

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

with CONSULT-III or

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

These DTC are prescribed by SAE J2012.
(CONSULT-III 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-III can identify them as shown below, therefore, CONSULT-III (if available) is recom-
mended.

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-III
or GST. The 1st trip freeze frame data can only be displayed on the CONSULT-III screen, not on the GST. For
detail, refer to

TM-33

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

TM-34

< FUNCTION DIAGNOSIS >

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-III, 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-III 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-54, "Emission-related Diagnostic Information"

(VQ40DE),

EC-522,

(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-III)

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

HOW TO ERASE DTC (WITH GST)

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.

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

EC-83, "Generic Scan Tool (GST)

Function"

(VQ40DE),

EC-551, "Generic Scan Tool (GST) Function"

(VK56DE).

HOW TO ERASE DTC (NO TOOLS)

Disconnect battery for 24 hours.

Reconnect battery.

Malfunction Indicator Lamp (MIL)

INFOID:0000000001282742

DESCRIPTION

The MIL is located on the instrument panel.

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-17, "WARNING LAMPS/

INDICATOR LAMPS : System Diagram"

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

DIAGNOSIS SYSTEM (TCM)

TM-35

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (TCM)

CONSULT-III Function (TRANSMISSION)

INFOID:0000000001282758

FUNCTION

CONSULT-III REFERENCE VALUE

NOTICE:
1.

The CONSULT-III electrically displays shift timing and lock-up timing (that is, operation timing of each
solenoid).
Check for time difference between actual shift timing and the CONSULT-III display. If the difference is
noticeable, mechanical parts (except solenoids, sensors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.

Shift schedule (which implies gear position) displayed on CONSULT-III and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:

Actual shift schedule has more or less tolerance or allowance,

Shift schedule indicated in Service Manual refers to the point where shifts start, and

Gear position displayed on CONSULT-III indicates the point where shifts are completed.

Display of solenoid valves on CONSULT-III changes at the start of shifting, while gear position is displayed
upon completion of shifting (which is computed by TCM).

Diagnostic test mode

Function

Reference page

Self-diagnostic results

Self-diagnostic results can be read and erased quickly.

"SELF-DIAG-

NOSTIC RESULT

MODE"

Work support

This mode enables a technician to adjust some devices faster and more accurately by
following the indications on CONSULT-III.

"DATA MONITOR

MODE"

Data monitor

Input/Output data in the TCM can be read.

"DATA MONITOR

MODE"

CAN diagnostic support
monitor

The results of transmit/receive diagnosis of CAN communication can be read.

LAN-60

Function test

Conducted by CONSULT-III instead of a technician to determine whether each system
is “OK” or “NG”.

—

DTC work support

Select the operating condition to confirm Diagnosis Trouble Codes.

"DTC WORK

SUPPORT

MODE"

ECU part number

TCM part number can be read.

—

Item name

Condition

Display value (Approx.)

ATF TEMP SE 1

C (32

F) - 20

C (68

F) - 80

C (176

3.3 - 2.7 - 0.9 V

ATF TEMP SE 2

3.3 - 2.5 - 0.7 V

TCC SOLENOID

When perform slip lock-up

0.2 - 0.4 A

When perform lock-up

0.4 - 0.6 A

SLCT LVR POSI

Selector lever in “N”,“P” positions.

N/P

Selector lever in “R” position.

Selector lever in “D” position.

Selector lever in “3” position.

Selector lever in “2” position.

Selector lever in “1” position.

VHCL/S SE·A/T

During driving

Approximately matches the
speedometer reading.

ENGINE SPEED

Engine running

Closely matches the tachometer
reading.

LINE PRES SOL

During driving

0.2 - 0.6 A

TM-36

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (TCM)

TURBINE REV

During driving (lock-up ON)

Approximately matches the en-
gine speed.

VHCL/S SE·MTR

During driving

Approximately matches the
speedometer reading.

ATF PRES SW 1

Front brake engaged. Refer to