Drive Mode System: Section
Drive Mode System: Section
SECTION
DRIVE MODE SYSTEM
DMS B
E
CONTENTS
INTEGRATED CONTROL SYSTEM ECU DIAGNOSIS INFORMATION ............... 9 F
DMS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000007577717
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see “SRS AIR BAG”.
• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, never use air or electric power tools or strike near the sensor(s) with
a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
SYSTEM DESCRIPTION A
COMPONENT PARTS
Component Parts Location INFOID:0000000007577718
B
JPNIA1862ZZ
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1. A/C auto amp 2. ECM 3. TCM
Refer to HAC-6, "Component Parts Refer to EC-16, "ENGINE CONTROL Refer to TM-69, "CVT CONTROL
Location" SYSTEM : SYSTEM : Component Parts Loca- N
Component Parts Location" tion"
4. EPS control unit 5. Drive mode switch 6. D-MODE select switch
Refer to STC-5, "Component Parts • NORMAL switch
DMS
Location" • SPORT switch
• ECO switch
A. Multi display unit
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DESCRIPTION
• The multi display unit connects to other units via CAN communica-
tion and performs the drive mode control.
• The following 3 drive modes are available, NORMAL, SPORT, and
ECO.
• The drive mode can be changed over as desired by pressing the
D-MODE select switch. The characteristics of the engine, CVT,
steering and air conditioner are changed accordingly.
• The display shows the current drive mode (NORMAL, SPORT,
ECO) as well as the vehicle information for the mode.
JSNIA3225ZZ
AVA1251
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AVA1257
AVA1254
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SYSTEM DIAGRAM
JPNIA1861GB
• The multi display unit transmits the operation status of the drive mode switch to other units via CAN commu-
nication as the mode signal (refer below).
- NORMAL: ON/OFF
- SPORT: ON/OFF
- ECO: ON/OFF
• Based on the mode signals received from TCM (CVT models) or multi display unit (M/T models) via CAN
communication, ECM changes over the throttle position and other characteristics.
• Based on the mode signals received from the multi display unit via CAN communication, TCM changes over
the gear shift line and other characteristics.
• Based on the mode signals received from the multi display unit via CAN communication, EPS C/U changes
the steering assist characteristic.
• Based on the ECO mode signal received from the multi display unit via CAN communication, the A/C auto
amp changes over the set temperature correction.
CONTROL DESCRIPTION
• The drive mode switch in the controller of the multi display unit is used to change over the vehicle mode and
thus change the control characteristics for the engine, transaxle, steering, and air conditioner.
Function Apply List
MR16DDT
M/T CVT
ENGINE × ×
SPORTS
CVT ×
STEERING × ×
ENGINE × ×
ECO
CVT ×
AIR CONDITIONER × ×
• With the NORMAL mode as the base mode, the control of vehicle characteristics is changed over to the fol-
lowing modes.
- SPORT: The control characteristics for the engine, transaxle, and steering system are changed so that a
sporty feel is created in the driving behavior.
- ECO: The control characteristics for the engine, transaxle, and automatic air conditioner are changed to help
improve the practical fuel economy.
Control mode A
Control item Control
SPORT NORMAL ECO
Improves the engine response to acceler-
×
— — ation pedal operation and enhances the B
Half open
Throttle position charac- torque feel.
teristic ×
Accelerates gently to assist in ECO driv-
ENGINE — — Late open- C
ing.
ing
Controls the throttle position to a smaller
Speed limiter for throttle
— — × level than NORMAL to help improve the
position D
practical fuel consumption.
Keeps the engine speed at a high level
High speed gear shift
× — — and improves the acceleration dynamism
line
and response. E
performs downshift upon braking before
Downshift upon braking × — — cornering to prevent a drop in the engine
TRANSAXLE speed. F
Helps the vehicle clear a curve smoothly
Cornering ratio hold × — — by restricting shift changes during corner-
ing.
G
Improves the practical fuel economy by
Low speed gear shift line — — ×
controlling the engine speed to a low level.
Changes the steering assist characteristc H
STEERING Assist characteristic × — —
to enhance a stable steering feel.
Air inlet control — — × Reduces the engine load by optimizing the
air conditioner control to a level that does
AIR CONDITIONER not adversely affect the interior comfort I
Blower fan control — — × and thus helps improve the practical fuel
economy.
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ENGINE, TRANSAXLE, STEERING, AIR CONDITIONER CONTROL
• For details on the engine control, refer to EC-58, "INTEGRATED CONTROL SYSTEM : System Descrip-
tion".
• For details on the transaxle control, refer to TM-98, "INTEGRATED CONTROL SYSTEM : System Descrip- K
tion".
• For details on the steering control, refer to STC-7, "EPS SYSTEM : System Description".
• For details on the air conditioner control, refer to HAC-18, "ECO Mode Control". L
DMS
• The engine torque, engine power, boost pressure, and instantaneous fuel consumption are provided for
information purposes only. They are not intended to prompt the driver to adjust driving style. The readings
may be slightly delayed relative to the actual vehicle behaviors. This is not a malfunction.
• The voltmeter reading cannot be used as an indicator for battery replacement because it indicates the input
voltage to the multi display unit, not the battery voltage.
• The ECO information screen is operable only while the vehicle is stopped.
• If no time setting is performed, the daily and weekly fuel consumption history data are not displayed.
• The readings may differ from the actual values depending on driving conditions.
ECU Reference
C
AV-146, "Reference Value"
Muiti display unit AV-148, "DTC Inspection Priority Chart"
AV-149, "DTC Index" D
DMS
WIRING DIAGRAM
INTEGRATED CONTROL SYSTEM
Wiring Diagram INFOID:0000000007577724
For connector terminal arrangements, harness layouts, and alphabets in a (option abbreviation; if not
described in wiring diagram), refer to GI-12, "Connector Information".
JRNWC1250GB
BASIC INSPECTION A
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow INFOID:0000000007577725
B
JSNIA4500GB
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>> GO TO 6.
5.PERFORM DIAGNOSIS BY SYMPTOM
Perform a diagnosis by symptom and repair or replace any malfunctioning part.
>> GO TO 6.
6.FINAL CHECK
Check that the multi display unit functions normally.
Does it operate normally?
YES >> End of trouble diagnosis
NO >> GO TO 2.
REMOVAL
Refer to IP-11, "Exploded View". C
DISASSEMBLY
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JPNIA1860ZZ
M
REMOVAL
Refer to IP-11, "Exploded View".
CAUTION: N
• When performing the work, use a shop cloth to protect the parts from damage.
• Always fix the harness clamp in position.
DMS
INSTALLATION
Install in the reverse order of removal.
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