Qashqai J11. Steering control system — part 1
STC-1
STEERING
C
D
E
F
H
I
J
K
L
M
SECTION
STC
A
B
STC
N
O
P
CONTENTS
STEERING CONTROL SYSTEM
HOW TO USE THIS MANUAL . . . . . ..
HOW TO USE THIS SECTION . . . . . . .
Information . . . . . . . . . . . . . . . ....
PRECAUTION . . . . . . . . . . . ...
PRECAUTIONS . . . . . . . . . . . . ...
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect . . . . . . . . .....
Precautions for Removing Battery Terminal . . .....
Precaution for Stop/Start System Service . . . .....
Service Notice and Precautions for EPS System . ..
SYSTEM DESCRIPTION . . . . . . . ..
COMPONENT PARTS . . . . . . . . . .
Component Parts Location . . . . . . . . . ....
EPS Control Unit . . . . . . . . . . . . . ...
EPS Motor, Torque Sensor, Reduction Gear . . ..
SYSTEM . . . . . . . . . . . . . . . .
EPS SYSTEM . . . . . . . . . . . . . . .
EPS SYSTEM : System Description . . . . . ...
EPS SYSTEM : Fail-safe . . . . . . . . . .
EPS SYSTEM : Protection Function . . . . . ...
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
.
CONSULT Function . . . . . . . . . . . .
ECU DIAGNOSIS INFORMATION . . . ..
EPS CONTROL UNIT . . . . . . . . . . .
Reference Value . . . . . . . . . . . . . .
Fail-safe . . . . . . . . . . . . . . . . ..
Protection Function . . . . . . . . . . . . .
DTC Inspection Priority Chart . . . . . . . . .
DTC Index . . . . . . . . . . . . . . . ...
WIRING DIAGRAM . . . . . . . . . ..
EPS SYSTEM . . . . . . . . . . . . .
Wiring Diagram . . . . . . . . . . . . . .
BASIC INSPECTION . . . . . . . . ...
DIAGNOSIS AND REPAIR WORK FLOW . ...
Work Flow . . . . . . . . . . . . . . . .
Diagnostic Work Sheet . . . . . . . . . . .
DTC/CIRCUIT DIAGNOSIS . . . . . . .
C1601 BATTERY POWER SUPPLY . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
C1604 TORQUE SENSOR . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
C1606 EPS MOTOR . . . . . . . . . . ..
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
C1607, C1608 EPS CONTROL UNIT . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
C1609 VEHICLE SPEED SIGNAL . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
U1000 CAN COMM CIRCUIT . . . . . . ...
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . ...
U1010 CONTROL UNIT (CAN) . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
STC-2
U1970 AROUND VIEW MONITOR SYSTEM .
DTC Logic . . . . . . . . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ..
POWER SUPPLY AND GROUND CIRCUIT . .
Description . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ..
POWER STEERING WARNING LAMP . . . .
Component Function Check . . . . . . . . ...
Diagnosis Procedure . . . . . . . . . . . ..
SYMPTOM DIAGNOSIS . . . . . . . .
POWER STEERING WARNING LAMP DOSE
NOT TURN ON . . . . . . . . . . . . ..
Description . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ..
POWER STEERING WARNING LAMP DOSE
NOT TURN OFF . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
STEERING WHEEL TURNING FORCE IS
HEAVY OR LIGHT . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
Description . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
UNBALANCE STEERING WHEEL TURNING
FORCE (TORQUE VARIATION) . . . . . ...
Description . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . ...
REMOVAL AND INSTALLATION . . . ..
EPS CONTROL UNIT . . . . . . . . . .
HOW TO USE THIS SECTION
STC-3
< HOW TO USE THIS MANUAL >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
HOW TO USE THIS MANUAL
HOW TO USE THIS SECTION
Information
INFOID:0000000010452090
• Both “VDC” and “ESP” are used in this manual. These indicate the same system.
• In this manual, “Idling Stop System” is referred to as “Stop / Start System”.
STC-4
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000010452181
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. 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.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000010495410
CAUTION:
Comply with the following cautions to prevent any error and malfunction.
• Before removing and installing any control units, first turn the ignition power source and accessory
power source to the OFF, then disconnect both battery cables.
• After finishing work, confirm that all control unit connectors are connected properly, then re-connect
both battery cables.
• Always use CONSULT to perform self-diagnosis as a part of each function inspection after finishing
work. If a DTC is detected, perform trouble diagnosis according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1.
Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2.
Open driver door.
3.
Turn the ignition switch to the ON position.
(At this time, the steering lock will be released.)
4.
Turn the ignition switch to OFF position with driver door open.
5.
Wait for 3 minutes or longer with driver door open.
NOTE:
• Do not close driver door because the steering wheel locks when driver door is closed.
PRECAUTIONS
STC-5
< PRECAUTION >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
• The auto acc function is adapted to this vehicle. For this reason, even when the ignition switch is turned
to OFF position, the accessory power source does not turned OFF and continues to be supplied for a
certain amount of time.
6.
Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.
7.
Perform the necessary repair operation.
8.
When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the ignition switch from OFF position to ON position, then to LOCK position. (The steering wheel will lock
when the ignition switch is turned to LOCK position.)
9.
Perform self-diagnosis check of all control units using CONSULT.
Precautions for Removing Battery Terminal
INFOID:0000000010503405
• With the adoption of Auto ACC function, ACC power is automatically supplied by operating the intelligent key
or remote keyless entry or by opening/closing the driver side door. In addition, ACC power is supplied even
after the ignition switch is turned to the OFF position, i.e. ACC power is supplied for a certain fixed time.
• When disconnecting the 12V battery terminal, turn off the ACC
power before disconnecting the 12V battery terminal, observing
“How to disconnect 12V battery terminal” described below.
NOTE:
Some ECUs operate for a certain fixed time even after ignition
switch is turned OFF and ignition power supply is stopped. If the
battery terminal is disconnected before ECU stops, accidental DTC
detection or ECU data damage may occur.
• For vehicles with the 2-batteries, be sure to connect the main bat-
tery and the sub battery before turning ON the ignition switch.
NOTE:
If the ignition switch is turned ON with any one of the terminals of
main battery and sub battery disconnected, then DTC may be detected.
• After installing the 12V battery, always check "Self Diagnosis Result" of all ECUs and erase DTC.
NOTE:
The removal of 12V battery may cause a DTC detection error.
HOW TO DISCONNECT 12V BATTERY TERMINAL
Disconnect 12V battery terminal according to instruction described below.
1.
Open the hood.
2.
Turn ignition switch to the ON position.
3.
Turn ignition switch to the OFF position with the driver side door opened.
4.
Get out of the vehicle and close the driver side door.
5.
Wait at least 3 minutes. For vehicle with the engine listed below, remove the battery terminal after a lapse
of the specified time.
CAUTION:
While waiting, never operate the vehicle such as locking, opening, and closing doors. Violation of
this caution results in the activation of ACC power supply according to the Auto ACC function.
6.
Remove 12V battery terminal.
CAUTION:
After installing 12V battery, always check self-diagnosis results of all ECUs and erase DTC.
Precaution for Stop/Start System Service
INFOID:0000000010452184
CAUTION:
When performing an inspection and its related work with the engine at idle, always open the hood and
release the stop/start system.
SEF289H
D4D engine
: 20 minutes
HRA2DDT
: 12 minutes
K9K engine
: 4 minutes
M9R engine
: 4 minutes
R9M engine
: 4 minutes
V9X engine
: 4 minutes
STC-6
< PRECAUTION >
PRECAUTIONS
Service Notice and Precautions for EPS System
INFOID:0000000010452185
• Check the following item when performing the trouble diagnosis.
- Check any possible causes by interviewing the symptom and it
′
s condition from the customer if any malfunc-
tion, such as power steering warning lamp is turned ON, occurs.
- Check if air pressure and size of tires are proper, the specified part is used for the steering wheel, and con-
trol unit is genuine part.
- Check if the connection of steering column assembly and steering gear assembly is proper (there is not
looseness of mounting bolts, damage of rods, boots or sealants, and leakage of grease, etc.).
- Check if the wheel alignment is adjusted properly.
- Check if there is any damage or modification to suspension or body resulting in increased weight or altered
ground clearance.
- Check if installation conditions of each link and suspension are proper.
- Check if the battery voltage is proper.
- Check connection conditions of each connector are proper.
- Before connecting or disconnecting the EPS control unit harness
connector, turn ignition switch “OFF” and disconnect battery
ground cable. Because battery voltage is applied to EPS control
unit even if ignition switch is turned “OFF”.
- When connecting or disconnecting pin connectors into or from
EPS control unit, take care not to damage pin terminals (bend or
break).
- When connecting pin connectors, make sure that there are no
bends or breaks on EPS control unit pin terminal.
• During quick steering, rasping noise may be heard from around the
steering wheel. This is not a malfunction. The noise is an operating
noise of the EPS system under normal conditions. If the rasping
noise occurs during slow steering, this may not be an operating
noise of the system. In this case, it is necessary to find out the
location of the noise and repair, if necessary.
SEF289H
SEF291H
COMPONENT PARTS
STC-7
< SYSTEM DESCRIPTION >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000010452096
LHD MODELS
Steering column assembly
No.
Component
Function
Around view monitor control unit
• Transmits mainly the following signals to EPS control unit via CAN communica-
tion.
- Intelligent parking assist status signal
- Current command signal
• Refer to
AV-131, "Component Parts Location"
for detailed installation location.
ABS actuator and electric unit (control unit)
• Transmits mainly the following signal to EPS control unit via CAN communica-
tion.
- Vehicle speed signal
• Refer to
BRC-9, "Component Parts Location"
for detailed installation location.
JMGIA0186ZZ
STC-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
RHD MODELS
ECM
• Transmits mainly the following signals to EPS control unit via CAN communica-
tion.
- Engine status signal
- Stop/start status signal
• Receives mainly the following signal to EPS control unit via CAN communica-
tion.
- EPS torque signal
• Refer to
ECH-13, "Component Parts Location"
(HRA2DDT),
GINE CONTROL SYSTEM : Component Parts Location"
, (MR16DDT),
629, "ENGINE CONTROL SYSTEM : Component Parts Location"
(MR20DD),
ECK-12, "Component Parts Location"
(R9M) for detailed installation location.
Combination meter
• Transmits mainly the following signal to EPS control unit via CAN communica-
tion.
- Vehicle speed signal
• Receives mainly the following signal to EPS control unit via CAN communica-
tion.
- Power steering warning lamp signal
EPS control unit
EPS motor
STC-10, "EPS Motor, Torque Sensor, Reduction Gear"
Torque sensor
STC-10, "EPS Motor, Torque Sensor, Reduction Gear"
Reduction gear
STC-10, "EPS Motor, Torque Sensor, Reduction Gear"
No.
Component
Function
Steering column assembly
JMGIA0187ZZ
COMPONENT PARTS
STC-9
< SYSTEM DESCRIPTION >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
EPS Control Unit
INFOID:0000000010452098
NOTE:
The EPC control unit, EPS motor, torque sensor, and reduction gear
are integrated with the steering column ASSY.
• EPS control unit
performs an arithmetical operation on data,
such as steering wheel turning force (sensor signal) from the
torque sensor, vehicle speed signal, etc. Then it generates an opti-
mum assist torque signal to the EPS motor according to the driving
condition.
• When the power steering function is used continuously for an
extended period of time, such as when steering wheel is turned
while the vehicle is stopped, output is reduced to the EPS motor in
order to protect EPS motor and EPS control unit. At this time, the
assist torque gradually decreases and more force is required to
operate the steering wheel. However the normal assist torque returns after steering operation is discontin-
ued for a period of time.
• If there is a malfunction in the electrical system, the fail-safe function activates and turns OFF the output sig-
nal to the EPS motor, resulting in manual steering conditions. At this time, the power steering warning lamp
illuminates to notify the driver of the system malfunction.
• When the stop/start system operation starts, the EPS control unit receives a stop/start status signal from
ECM via CAN communication and disables the assist control.
• When the driver turns the steering wheel (torque application exceeding the specified torque) during stop/
start system operation, the EPS control unit transmits an EPS torque signal to ECM via CAN communication
and restarts the engine (disables stop/start system).
No.
Component
Function
Combination meter
• Transmits mainly the following signal to EPS control unit via CAN communica-
tion.
- Vehicle speed signal
• Receives mainly the following signal to EPS control unit via CAN communica-
tion.
- Power steering warning lamp signal
ECM
• Transmits mainly the following signals to EPS control unit via CAN communica-
tion.
- Engine status signal
- Stop/start status signal
• Receives mainly the following signal to EPS control unit via CAN communica-
tion.
- EPS torque signal
• Refer to
ECH-13, "Component Parts Location"
GINE CONTROL SYSTEM : Component Parts Location"
629, "ENGINE CONTROL SYSTEM : Component Parts Location"
(MR20DD),
ECK-12, "Component Parts Location"
(K9K) or
(R9M) for detailed installation location.
ABS actuator and electric unit (control unit)
• Transmits mainly the following signal to EPS control unit via CAN communica-
tion.
- Vehicle speed signal
• Refer to
BRC-9, "Component Parts Location"
for detailed installation location.
Around view monitor control unit
• Transmits mainly the following signals to EPS control unit via CAN communica-
tion.
- Intelligent parking assist status signal
- Current command signal
• Refer to
AV-131, "Component Parts Location"
for detailed installation location.
EPS control unit
EPS motor
STC-10, "EPS Motor, Torque Sensor, Reduction Gear"
Torque sensor
STC-10, "EPS Motor, Torque Sensor, Reduction Gear"
Reduction gear
STC-10, "EPS Motor, Torque Sensor, Reduction Gear"
JSGIA1430ZZ
STC-10
< SYSTEM DESCRIPTION >
COMPONENT PARTS
• The intelligent parking assist status signal and current command signal are received from around view mon-
itor control unit via CAN communication for Intelligent Parking Assist control.
• The EPS control unit sends the Intelligent Parking Assist status signal to the around view monitor control unit
to indicate whether or not Intelligent Parking Assist control is possible.
• When the driver turns the steering wheel during Intelligent Parking Assist control, Intelligent Parking Assist
control is canceled.
• This enables diagnosis using CONSULT.
EPS Motor, Torque Sensor, Reduction Gear
INFOID:0000000010452099
NOTE:
The EPC control unit, EPS motor, torque sensor, and reduction gear are integrated with the steering column
ASSY.
EPS motor
, torque sensor
and reduction gear
are installed
to steering column assembly.
EPS MOTOR
EPS motor provides the assist torque by the control signal from EPS control unit.
TORQUE SENSOR
Torque sensor detects the steering torque, and transmit the signal to EPS control unit.
REDUCTION GEAR
Reduction gear increases the assist torque provided from EPS motor with worm gears, and outputs to the col-
umn shaft.
JSGIA1431ZZ
SYSTEM
STC-11
< SYSTEM DESCRIPTION >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
SYSTEM
EPS SYSTEM
EPS SYSTEM : System Description
INFOID:0000000010452102
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL
Communicates the signal from each control unit via CAN communication.
DESCRIPTION
JMGIA0188GB
Control unit
Signal status
ECM
• Transmits mainly the following signals to EPS control unit via CAN communication.
- Engine status signal
- Stop/start status signal
• Receives mainly the following signal to EPS control unit via CAN communication.
- EPS torque signal
ABS actuator and electric unit (con-
trol unit)
• Transmits mainly the following signal to EPS control unit via CAN communication.
- Vehicle speed signal
Combination meter
• Transmits mainly the following signal to EPS control unit via CAN communication.
- Vehicle speed signal
• Receives mainly the following signal to EPS control unit via CAN communication.
- Power steering warning lamp signal
Around view monitor control unit
• Transmits mainly the following signals to EPS control unit via CAN communication.
- Intelligent parking assist status signal
- Current command signal
STC-12
< SYSTEM DESCRIPTION >
SYSTEM
• EPS control unit performs an arithmetical operation on data, such
as steering wheel turning force (sensor signal) from the torque
sensor, vehicle speed signal, etc. Then it generates an optimum
assist torque signal to the EPS motor according to the driving con-
dition.
• In case of an error in the electrical system, the fail-safe function
stops output signals to the EPS motor. Refer to
.
• EPS control unit decreases the output signal to EPS motor while
extremely using the power steering function (e.g., full steering)
consecutively for protecting EPS motor and EPS control unit
(Overload protection control). Refer to
• Extensive steering at low speed will cause the ECU and MOTOR
to heat up, once temperature reaches critical point ECU will reduce
current to reduce heat up. System will recover as temperature low-
ers (reduced or no assistance).
• When the driver turns the steering wheel (torque application
exceeding the specified torque) during stop/start, the EPS control
unit restarts the engine (disables stop/start system) and immedi-
ately brings the assist control in its ready-to-start state.
• If EPS becomes out of order, the power steering warning lamp
blinks and the Stop/Start System brings about such conditions as
follows:
- Stop/start mode is not enabled under non stop/start state.
- The engine is restarted during stop/start, regardless of steering wheel operation.
• The Intelligent Parking Assist function provides support for garage parking and parallel parking, and auto-
matically operates the steering wheel when the system is active.
POWER STEERING WARNING LAMP INDICATION
• This light illuminates when the fail-safe function is activated, notifying the driver that there is a malfunction in
the system and that steering state is manual (more force is required to turn the steering wheel).
• Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF after the engine
starts, if system is normal.
NOTE:
Power steering warning lamp also turns ON due to data reception error, CAN communication error etc.
EPS SYSTEM : Fail-safe
INFOID:0000000010470621
• If any malfunction occurs in the system and control unit detects the malfunction, power steering warning
lamp on combination meter turns ON to indicate system malfunction.
• When power steering warning lamp is ON, the system enters into a manual steering state. (Control turning
force steering wheel becomes heavy.)
JMGIA0185GB
Condition
Power steering warning lamp
Ignition switch ON. (Lamp check)
ON
Engine running.
OFF
EPS system malfunction [Other diagnostic item]
ON
DTC
Fail-safe condition
C1601
The assist force is reduced according to the voltage, eventually ending with manual steering state
C1604
Manual steering state
C1606
C1607
C1608
C1609
Non-speed sensitive steering assist
SYSTEM
STC-13
< SYSTEM DESCRIPTION >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
EPS SYSTEM : Protection Function
INFOID:0000000010470622
EPS control unit decreases the output signal to EPS motor while extremely using the power steering function
(e.g., full steering) consecutively for protecting EPS motor and EPS control unit (Overload protection control).
While activating overload protection control, the assist torque gradually decreases, and the steering wheel
turning force becomes heavy. The normal assist torque reactivates by no steering.
U1000
• Non-speed sensitive steering assist
• Intelligent Parking Assist function (controlled from around view monitor) or Stop/Start system function (controlled
from ECM) is stopped
U1010
Normal control
U1970
Intelligent Parking Assist function (controlled from around view monitor) is stopped
DTC
Fail-safe condition
STC-14
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
CONSULT Function
INFOID:0000000010452105
FUNCTION
CONSULT can display each diagnostic item using the diagnostic test modes shown following.
*: The following diagnosis information is erased by erasing.
• DTC
• Freeze frame data (FFD)
ECU IDENTIFICATION
Displays the part number stored in the control unit.
SELF-DIAG RESULTS MODE
.
When “CRNT” is displayed on self-diagnosis result.
• The system is presently malfunctioning.
When “PAST” is displayed on self-diagnosis result.
• System malfunction in the past is detected, but the system is presently normal.
FREEZE FRAME DATA (FFD)
The following vehicle status is recorded when DTC is detected and is displayed on CONSULT.
DATA MONITOR MODE
NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.
Diagnostic test mode
Function
ECU identification
The part number stored in the control unit can be read.
Self diagnostic result
Self-diagnostic results and freeze frame data can be read and erased quickly.
*
Data monitor
Input/Output data in the EPS control unit can be read.
Item name
Display item
IGN COUNTER
(0 – 39)
The number of times that ignition switch is turned ON after the DTC is detected is displayed.
• When “0” is displayed: It indicates that the system is presently malfunctioning.
• When except “0” is displayed: It indicates that system malfunction in the past is detected, but the system is pres-
ently normal.
NOTE:
Each time when ignition switch is turned OFF to ON, numerical number increases in 1
→
2
→
3...38
→
39.
When the operation number of times exceeds 39, the number do not increase and “39” is displayed until self-
diagnosis is erased.
Monitor item (Unit)
Remarks
BATTERY VOLT (V)
Displays the power supply voltage for EPS control unit.
TORQUE SENSOR (Nm)
Displays steering wheel turning force detected by torque sensor.
MOTOR CURRENT (A)
Displays the current value consumed by EPS motor.
*1
MOTOR SIG (A)
Displays the current commanded value to EPS motor.
ASSIST TORQUE (Nm)
Displays assist torque being output by the electric power steering.
C/U TEMP [
°
C (
°
F)]
Displays the temperature of the EPS control unit.
ASSIST LEVEL (%)
Normally displays 100%. In case of an excessive stationary steering, the assist
curvature gradually falls. However, it return to 100% when left standing.
*2
VEHICLE SPEED [km/h (MPH)]
Vehicle speed is displayed from vehicle speed signal via CAN communication.
*3
WARNING LAMP (On/Off)
Power steering warning lamp control status is displayed.
ENGINE STATUS (Stop/Run)
Engine speed is displayed from engine status signal via CAN communication.
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
STC-15
< SYSTEM DESCRIPTION >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
*1: Almost in accordance with the value of “MOTOR SIG”. It is not a malfunction though these values are not
accorded when steering quickly.
*2: Normally displays 100%. In case of an excessive stationary steering, the assist curvature gradually falls.
However, it returns to 100% when left standing.
*3: It is not a malfunction, though it might not be corresponding just after ignition switch in turned ON.
ST TORQUE STATUS (On/Off)
Displays steering status.
EPS ASSIST PERMIS (On/Off)
Displays assist permission status of EPS system.
STOP/START STATUS (INACT/AUTO ST/ACT/
CANCEL)
Displays stop/start status.
IPA ON (Off 1/Off 2/Off 3/On)
Displays Intelligent Parking Assist status.
IPA STATUS 1 (On/Off)
Displays operating status of Intelligent Parking Assist
STOP/START SYSTEM (On/Off)
Displays permission status of stop/start system.
IPA STATUS 2 (Off/On 1/On 2)
Displays operating status of Intelligent Parking Assist.
IPA STATUS 3 (NORMAL/MALF)
Displays Intelligent Parking Assist status.
IPA TARGET CURRENT (A)
Displays the command current value from Intelligent Parking Assist.
EPS CONTROL CURRENT (A)
Displays motor current value.
Monitor item (Unit)
Remarks
STC-16
< ECU DIAGNOSIS INFORMATION >
EPS CONTROL UNIT
ECU DIAGNOSIS INFORMATION
EPS CONTROL UNIT
Reference Value
INFOID:0000000010452106
VALUES ON THE DIAGNOSIS TOOL
NOTE:
• The output signal indicates the EPS control unit calculation data. The normal values will be displayed even
in the event that the output circuit (harness) is open.
• The following table includes information (items) inapplicable to this vehicle. For information (items) applica-
ble to this vehicle, refer to CONSULT display items.
Monitor item
Data monitor
Condition
Display value
BATTERY VOLT
Ignition switch: ON
10.5 – 16 (V)
TORQUE SENSOR
Engine running
Steering wheel: Not steering (There is
no steering force)
Approx. 0.0 Nm
Steering wheel: Right turn
Positive value (Nm)
Steering wheel: Left turn
Negative value (Nm)
MOTOR CURRENT
Engine running
Steering wheel: Not steering (There is
no steering force)
Approx. 0 A
Steering wheel: Right or left turn
Displays consumption current of
EPS motor (A)
*1
MOTOR SIG
Engine running
Steering wheel: Not steering (There is
no steering force)
Approx. 0 A
Steering wheel: Right turn
Positive value (A)
Steering wheel: Left turn
Negative value (A)
ASSIST TORQUE
Engine running
Steering wheel: Not steering (There is
no steering force)
0.00 Nm
Steering wheel: Right turn
Positive value (Nm)
Steering wheel: Left turn
Negative value (Nm)
C/U TEMP
Ignition switch ON or engine running
Displays temperature of inside of
EPS control unit [
°
C (
°
F)]
ASSIST LEVEL
Engine running
100 %
*2
VEHICLE SPEED
Vehicle stopped
0 km/h (0 mph)
While driving
Approximately equal to the indication
on speedometer
*3
(inside of
±
10%)
WARNING LAMP
Power steering warning lamp: ON
On
Power steering warning lamp: OFF
Off
ENGINE STATUS
Engine not running
Stop
Engine running
Run
ST TORQUE STATUS
Engine running
Steering wheel: Not steering (There is
no steering force)
Off
Steering wheel: Right or left turn
On
EPS ASSIST PERMIS
Engine running
Status other than stop/start system
On
In stop/start system operation
Off
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст