Nissan Juke F15. Manual — part 1188
STC-8
< SYSTEM DESCRIPTION >
SYSTEM
*: Models with Integrated Control System
EPS WARNING LAMP INDICATION
• Turn ON when there is a malfunction in EPS system. If indicates that fail-safe mode is engaged and enters a
manual steering state (Control turning force 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:0000000012199918
• If any malfunction occurs in the system, and control unit detects the malfunction, EPS warning lamp on com-
bination meter turns ON to indicate system malfunction.
• When EPS warning lamp is ON, enters into a manual steering state. (Control turning force steering wheel
becomes heavy.)
EPS SYSTEM : Protection Function
INFOID:0000000012199919
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 is recovered if the steering wheel is not turned for a
while.
Combination meter
• Transmits mainly the following signals to EPS control unit via CAN communication.
- Vehicle speed signal
• Receives mainly the following signals from EPS control unit via CAN communication.
- EPS warning lamp signal
Multi display unit
*
• Transmits mainly the following signals to EPS control unit via CAN communication.
- ECO mode signal
- NORMAL mode signal
- SPORT mode signal
Control unit
Signal status
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)
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< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
CONSULT Function
INFOID:0000000012199920
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 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.
STC-10
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
*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.
*4: Displays NORMAL in models without Integrated Control System.
ENGINE STATUS (Stop/Run)
Engine speed is displayed from engine status signal via CAN communication.
STEERING MODE (NORMAL/SPORT)
*4
Display the driving mode of Integrated Control System received through CAN
communication.
Monitor item (Unit)
Remarks
EPS CONTROL UNIT
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< ECU DIAGNOSIS INFORMATION >
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ECU DIAGNOSIS INFORMATION
EPS CONTROL UNIT
Reference Value
INFOID:0000000012199921
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
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.
NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.
*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.
Monitor item
Data monitor
Condition
Display value
BATTERY VOLT
Ignition switch: ON
Battery voltage
TORQUE SENSOR
Engine running
Steering wheel: Not steering (There is
no steering force)
Approx. 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)
Approx. 0 Nm
Steering wheel: Right or left turn
Displays assist torque of EPS motor
(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
EPS warning lamp: ON
On
EPS warning lamp: OFF
Off
ENGINE STATUS
Engine not running
Stop
Engine running
Run
STEERING MODE
*4
Engine running
Driving mode of Integrated Control
System: Except SPORT
NORMAL
Driving mode of Integrated Control
System: SPORT
SPORT
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