Nissan Rogue. Instruction — part 1144
STC-6
< SYSTEM DESCRIPTION >
COMPONENT PARTS
EPS Control Unit
INFOID:0000000011279637
• EPS control unit (1) is installed to steering column assembly.
• 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.
• EPS control unit decreases the output signal to EPS motor during
continuous extreme use of the power steering function (e.g., full
steering) for protection of the EPS motor and EPS control unit
(Overload protection control).
EPS Motor, Torque Sensor, Reduction Gear
INFOID:0000000011279638
EPS motor (1), torque sensor (2) and reduction gear (3) are installed
to steering column assembly.
EPS MOTOR
EPS motor provides assist torque in proportion to the control signal from the EPS control unit.
TORQUE SENSOR
Torque sensor detects the steering torque and transmits the signal to the EPS control unit.
REDUCTION GEAR
Reduction gear increases the assist torque provided from the EPS motor, and outputs to the column shaft.
JSGIA0852ZZ
JSGIA0853ZZ
SYSTEM
STC-7
< 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:0000000011279639
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL
Communicates the signal from each control unit via CAN communication.
DESCRIPTION
JSGIA0877GB
Control unit
Signal status
ECM
• Transmits the following signal to EPS control unit via CAN communication:
- Engine status signal
ABS actuator and electric unit (con-
trol unit)
• Transmits the following signal to EPS control unit via CAN communication:
- Vehicle speed signal (ABS)
Combination meter
• Transmits the following signal to EPS control unit via CAN communication:
- Vehicle speed signal (Meter)
• Receives the following signal from EPS control unit via CAN communication:
- EPS warning lamp signal
STC-8
< 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 during
extreme use of the power steering function (e.g., full steering) for
protection of the EPS motor and EPS control unit (Overload pro-
tection control).
• Extensive steering at low speed will cause the EPS control unit
and EPS motor to heat up. Once temperature reaches the critical
point, the EPS control unit will reduce current to reduce heat up.
System will recover as temperature lowers (reduced or no assis-
tance).
EPS WARNING LAMP INDICATION
• Turns ON when there is a malfunction in the EPS system. If ON, fail-safe mode is engaged and the system
enters a instruction steering state (turning force at steering wheel becomes heavy).
• Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF after the engine
starts, if system is normal.
CAUTION:
EPS warning lamp also turns ON due to data reception error, CAN communication error etc.
EPS SYSTEM : Fail-Safe
INFOID:0000000011279640
• If any malfunction occurs in the system and the control unit detects the malfunction, the EPS warning lamp in
the combination meter turns ON to indicate system malfunction.
• When EPS warning lamp is ON, the system enters into a instruction steering state. (turning force at steering
wheel becomes heavy.)
• Under abnormal vehicle speed signal conditions, vehicle speed is judged as constant.
EPS SYSTEM : Protection Function
INFOID:0000000011279641
While overload protection control is activated, assist torque gradually decreases and the steering wheel turn-
ing force becomes heavy. Assist torque returns to normal if the steering wheel is not turned for a while.
JSGIA1102GB
Condition
EPS warning lamp
Ignition switch ON. (Lamp check)
ON
Engine running.
OFF
EPS system malfunction [Other diagnostic item]
ON
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
STC-9
< SYSTEM DESCRIPTION >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
CONSULT Function
INFOID:0000000011279642
FUNCTION
CONSULT can display each diagnostic item using the diagnostic test modes shown following:
*: The following diagnosis information is cleared 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 Diagnostic Result”:
• The system is presently malfunctioning.
When “PAST” is displayed on “Self Diagnostic 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 of EPS motor being output by the electric power steering.
C/U TEMP (
°C) or (°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) or (MPH)
Vehicle speed is displayed from vehicle speed signal via CAN communication.
*3
WARNING LAMP (On/Off)
EPS warning lamp control status is displayed.
ENGINE STATUS (Stop/Run)
Engine speed is displayed from engine status signal via CAN communication.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст