Nissan Juke (2012 year). Service Repair Manual — part 217
PRECAUTIONS
STC-3
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000007579103
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.
Service Notice or Precautions for EPS System
INFOID:0000000007579104
• 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 EPS 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.
Revision: 2011 October
2012 JUKE
STC-4
< PRECAUTION >
PRECAUTIONS
- 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
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COMPONENT PARTS
STC-5
< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000007579105
*: Models with Integrated Control System
Component Description
INFOID:0000000007579106
1.
Multi display unit
*
.
2.
ABS actuator and electric unit (con-
trol unit)
Refer to
3.
ECM
Refer to
TROL SYSTEM :
Component Parts Location"
4.
Combination meter
Refer to
.
5.
EPS warning lamp
(In combination meter)
6.
EPS motor
7.
EPS control unit
8.
Reduction gear
9.
Torque sensor
A.
Steering column assembly
JSGIA0830GB
Components parts
Reference
EPS control unit
EPS motor
Torque sensor
Reduction gear
EPS warning lamp
STC-7, "EPS SYSTEM : System Description"
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STC-6
< SYSTEM DESCRIPTION >
COMPONENT PARTS
*: Models with Integrated Control System
EPS Control Unit
INFOID:0000000007579107
• 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 condition.
• EPS control unit decreases the output signal to EPS motor while extremely using the power steering func-
tion (e.g., full steering) consecutively for protecting EPS motor and EPS control unit (Overload protection
control).
• In SPORT mode, changes the steering assist characteristic to enhance a stable steering feel according to
the mode signals from multi display unit via CAN communication. (Models with Integrated Control System)
EPS Motor
INFOID:0000000007579108
EPS motor provides the assist torque by the control signal from EPS control unit.
Torque Sensor
INFOID:0000000007579109
Torque sensor detects the steering torque, and transmit the signal to EPS control unit.
Reduction Gear
INFOID:0000000007579110
Reduction gear increases the assist torque provided from EPS motor with worm gears, and outputs to the col-
umn shaft.
ECM
• Transmits mainly the following signals to EPS control unit via
CAN communication.
- Engine status signal
ABS actuator and electric unit (control 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
• Turns ON the EPS warning lamp according to the signal from
EPS control unit via CAN communication.
Multi display unit
*
• Transmits mainly the following signals to EPS control unit via
CAN communication.
- ECO mode signal
- NORMAL mode signal
- SPORT mode signal
Components parts
Reference
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SYSTEM
STC-7
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SYSTEM
EPS SYSTEM
EPS SYSTEM : System Description
INFOID:0000000007579111
• 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 EPS control unit
and EPS motor to heat up, once temperature reaches critical point
EPS control unit will reduce current to reduce heat up. System will
recover as temperature lowers (reduced or no assistance).
• In SPORT mode, changes the steering assist characteristic to
enhance a stable steering feel according to the mode signals from
multi display unit via CAN communication. (Models with Integrated
Control System)
SYSTEM DIAGRAM
Multi display unit is applied to models with Integrated Control System.
INPUT/OUTPUT SIGNAL
Communicates the signal from each control unit via CAN communication.
JSGIA0832GB
JSGIA0833GB
Control unit
Signal status
ECM
• Transmits mainly the following signals to EPS control unit via CAN communication.
- Engine status signal
ABS actuator and electric unit (con-
trol unit)
• Transmits mainly the following signals to EPS control unit via CAN communication.
- Vehicle speed signal
Revision: 2011 October
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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:0000000007579112
• 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:0000000007579113
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
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DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
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DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
CONSULT Function
INFOID:0000000007579114
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
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.
STEERING MODE (NORMAL/SPORT)
*4
Display the driving mode of Integrated Control System received through CAN
communication.
Revision: 2011 October
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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.
Revision: 2011 October
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EPS CONTROL UNIT
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ECU DIAGNOSIS INFORMATION
EPS CONTROL UNIT
Reference Value
INFOID:0000000007579115
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.
*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.
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
Revision: 2011 October
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STC-12
< ECU DIAGNOSIS INFORMATION >
EPS CONTROL UNIT
TERMINAL LAYOUT
PHYSICAL VALUES
Fail-Safe
INFOID:0000000007579116
• 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.)
Protection Function
INFOID:0000000007579117
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.
DTC Inspection Priority Chart
INFOID:0000000007579118
When multiple DTCs are detected simultaneously, check one by one depending on the following priority list.
JSGIA0834ZZ
Terminal No.
(Wire Color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/Output
1
(P)
—
CAN-L
Input/Output
—
—
2
(L)
—
CAN-H
Input/Output
—
—
4
(LG)
Ground
Ignition power supply
Input
Ignition switch: ON
9 – 18.2 V
Ignition switch: OFF
0 V
9
(R)
Ground
Battery power supply
Input
Always
9 – 18.2 V
10
(B)
Ground
Ground
—
Always
0 V
Priority
Priority order item (DTC)
1
U1000 CAN COMM CIRCUIT
2
C1609 VEHICLE SPEED SIGNAL
3
C1601 BATTERY POWER SUPPLY
4
Other than the above
Revision: 2011 October
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EPS CONTROL UNIT
STC-13
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DTC Index
INFOID:0000000007579119
DTC
Items (CONSULT screen terms)
Reference
C1601
BATTERY VOLT
C1604
TORQUE SENSOR
C1606
EPS MOTOR
C1607
EEPROM
C1608
CONTROL UNIT
C1609
CAN VHCL SPEED
U1000
CAN COMM CIRCUIT
Revision: 2011 October
2012 JUKE
STC-14
< WIRING DIAGRAM >
ELECTRONICALLY CONTROLLED POWER STEERING SYSTEM
WIRING DIAGRAM
ELECTRONICALLY CONTROLLED POWER STEERING SYSTEM
Wiring Diagram
INFOID:0000000007579120
For connector terminal arrangements, harness layouts, and alphabets in a
(option abbreviation; if not
described in wiring diagram), refer to
GI-12, "Connector Information"
JCGWA0280GB
Revision: 2011 October
2012 JUKE
DIAGNOSIS AND REPAIR WORKFLOW
STC-15
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work Flow
INFOID:0000000007579121
DETAILED FLOW
1.
INTERVIEW FROM THE CUSTOMER
Clarify customer complaints before inspection. First of all, perform an interview utilizing
and reproduce symptoms as well as fully understand it. Ask customer about his/her complaints
carefully. Check symptoms by driving vehicle with customer, if necessary.
CAUTION:
Customers are not professional. Never guess easily like “maybe the customer means that...,” or
“maybe the customer mentions this symptom”.
>> GO TO 2.
2.
CHECK SYMPTOM
Reproduce the symptom that is indicated by the customer, based on the information from the customer
obtained by interview. Also check that the symptom is not caused by protection function. Refer to
CAUTION:
When the symptom is caused by normal operation, fully inspect each portion and obtain the under-
standing of customer that the symptom is not caused by a malfunction.
>> GO TO 3.
3.
PERFORM SELF-DIAGNOSIS
With CONSULT
Perform self-diagnosis.
Is any DTC detected?
YES
>> Record or print DTC and freeze frame data (FFD). GO TO 4.
NO
>> GO TO 6.
4.
RECHECK SYMPTOM
With CONSULT
1.
Erase self-diagnostic results for “EPS”.
2.
Perform DTC confirmation procedures for the error detected system.
NOTE:
If some DTCs are detected at the same time, determine the order for performing the diagnosis based on
12, "DTC Inspection Priority Chart"
Is any DTC detected?
YES
>> GO TO 5.
NO
>> Check harness and connectors based on the information obtained by interview. Refer to
.
5.
REPAIR OR REPLACE ERROR-DETECTED PARTS
• Repair or replace error-detected parts.
• Reconnect part or connector after repairing or replacing.
• When DTC is detected, erase self-diagnostic results for “EPS”.
>> GO TO 7.
6.
IDENTIFY ERROR-DETECTED SYSTEM BY SYMPTOM DIAGNOSIS
Estimate error-detected system based on symptom diagnosis and perform inspection.
Can the error-detected system be identified?
Revision: 2011 October
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STC-16
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
YES
>> GO TO 7.
NO
>> Check harness and connectors based on the information obtained by interview. Refer to
.
7.
FINAL CHECK
With CONSULT
1.
Check the reference value for EPS control unit.
2.
Recheck the symptom and check that symptom is not reproduced on the same conditions.
Is the symptom reproduced?
YES
>> GO TO 3.
NO
>> INSPECTION END
Diagnostic Work Sheet
INFOID:0000000007579122
Description
• In general, customers have their own criteria for a problem. Therefore, it is important to understand the
symptom and status well enough by asking the customer about his/her concerns carefully. To systemize all
the information for the diagnosis, prepare the interview sheet referring to the interview points.
• In some cases, multiple conditions that appear simultaneously may cause a DTC to be detected.
Interview sheet sample
Interview sheet
Customer
name
MR/MS
Registration
number
Initial year
registration
Vehicle type
VIN
Storage date
Engine
Mileage
km (Mile)
Symptom
The steering wheel position (center) is in the wrong position.
EPS warning lamp turns on.
Noise
Vibration
Others
(
)
First occurrence
Recently
Others (
)
Frequency of occurrence
Always
Under a certain conditions of
Sometimes (time(s)/day)
Climate con-
ditions
Irrelevant
Weather
Fine
Cloud
Rain
Snow
Others (
)
Temperature
Hot
Warm
Cool
Cold
Temperature [Approx.
°
C (
°
F)]
Relative humidity
High
Moderate
Low
Road conditions
Urban area
Suburb area
High way
Mounting road (uphill or down hill)
Rough road
Operation conditions, etc.
Irrelevant
When engine starts
During idling
During driving
During acceleration
At constant speed driving
During deceleration
During cornering (right curve or left curve)
During steering
Revision: 2011 October
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DIAGNOSIS AND REPAIR WORKFLOW
STC-17
< BASIC INSPECTION >
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Other conditions
Memo
Interview sheet
Customer
name
MR/MS
Registration
number
Initial year
registration
Vehicle type
VIN
Storage date
Engine
Mileage
km (Mile)
Revision: 2011 October
2012 JUKE
STC-18
< DTC/CIRCUIT DIAGNOSIS >
C1601 BATTERY POWER SUPPLY
DTC/CIRCUIT DIAGNOSIS
C1601 BATTERY POWER SUPPLY
DTC Logic
INFOID:0000000007579123
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
>> GO TO 2.
2.
DTC REPRODUCTION PROCEDURE
With CONSULT
1.
Turn the ignition switch OFF to ON.
2.
Perform “EPS” self-diagnosis.
Is DTC “C1601” detected?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000007579124
1.
CHECK EPS CONTROL UNIT GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EPS control unit harness connector.
3.
Check continuity between EPS control unit harness connector terminal and ground.
4.
Connect EPS control unit harness connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
2.
CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT (1)
1.
Check voltage between EPS control unit harness connector terminals and ground.
2.
Turn ignition switch ON.
CAUTION:
Never start the engine.
DTC
Display item
Malfunction detected condition
Possible cause
C1601
BATTERY VOLT
When a power supply voltage to the EPS control unit
is maintained at 18.2 V or more or at less than 9 V
continuously for five second or more.
• Harness or connector
• EPS control unit
• Fuse
• Power supply system
• Battery
EPS control unit
—
Continuity
Connector
Terminal
M38
10
Ground
Existed
EPS control unit
—
Voltage
Connector
Terminal
M37
4
Ground
Approx. 0 V
Revision: 2011 October
2012 JUKE
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