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Nissan Titan. Manual - part 588

A/T SHIFT LOCK SYSTEM

TM-35

< SYSTEM DESCRIPTION >

Stop lamp switch

Park position switch

Shift lock solenoid

ALDIA0213ZZ

TM-36

< SYSTEM DESCRIPTION >

ON BOARD DIAGNOSTIC (OBD) SYSTEM

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Introduction

INFOID:0000000009885695

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-38, "CONSULT Function (TRANSMISSION)"

OBD-II Function for A/T System

INFOID:0000000009885696

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:0000000009885697

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:0000000009885698

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-36

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

ON BOARD DIAGNOSTIC (OBD) SYSTEM

TM-37

< SYSTEM DESCRIPTION >

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-46, "On Board Diagnosis Function"

• 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 selectioning "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-37, "GST (Generic Scan Tool)"

HOW TO ERASE DTC (NO TOOLS)

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

Malfunction Indicator Lamp (MIL)

INFOID:0000000009885699

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

EC-111, "Trouble Diagnosis

Introduction"

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

JSBIA1315ZZ

TM-38

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (TCM)

DIAGNOSIS SYSTEM (TCM)

CONSULT Function (TRANSMISSION)

INFOID:0000000009885700

CONSULT can display each diagnostic item using the diagnostic test modes shown following.

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 work support

DTC reproduction procedure can be performed speedily and precisely.

ECU Identification

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

Items (CONSULT

screen terms)

Malfunction is detected when...

TCM self-di-

agnosis

OBD (DTC)

Reference

page

“TRANSMIS-

SION” with

CONSULT

MIL indicator
lamp*1, “EN-

GINE” with

CONSULT or

GST

CAN COMM CIRCUIT

• When a malfunction is detected in CAN communica-

tions

U1000

TM-48

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-49

TRANSMISSION
CONT

• TCM is malfunctioning.

P0700

TM-52

T/M RANGE SWITCH 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-53

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-56

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, irregular vehicle

speed signal input from combination meter before the
vehicle starts moving

P0720

TM-59

ENGINE SPEED

• TCM does not receive the CAN communication signal

from the ECM.

P0725

—

TM-61

1GR INCORRECT RA-
TIO

• A/T cannot shift to 1GR

P0731

TM-64

2GR INCORRECT RA-
TIO

• A/T cannot shift to 2GR

P0732

TM-66

3GR INCORRECT RA-
TIO

• A/T cannot shift to 3GR

P0733

TM-68

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