2016 NISSAN NOTE sensor

STC-1
STEERING
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CONTENTS
STEERING CONTROL SYSTEM
PRECAUTION ....... ........................................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Service Notice and Precautions for EPS System ......3
SYSTEM DESCRIPTION ..............................4
COMPONENT PARTS ................................... .....4
Component Parts Location .................................. ......4
EPS Control Unit .......................................................5
EPS Motor, Torque Sensor, Reduction Gear ............5
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
.....
6
CONSULT Function ............................................ ......6
ECU DIAGNOSIS INFORMATION ...............8
EPS CONTROL UNIT ..................................... .....8
Reference Value ................................................. ......8
Fail-Safe ....................................................................9
Protection Function .................................................10
DTC Inspection Priority Chart ............................. ....10
DTC Index ........................................................... ....10
WIRING DIAGRAM ......................................11
EPS SYSTEM ... .............................................. ....11
Wiring Diagram ................................................... ....11
BASIC INSPECTION ...................................15
DIAGNOSIS AND REPAIR WORKFLOW ..... ....15
Work Flow ........................................................... ....15
Diagnostic Work Sheet ............................................16
DTC/CIRCUIT DIAGNOSIS .........................18
C1601 BATTERY POWER SUPPLY .................18
DTC Logic ........................................................... ....18
Diagnosis Procedure ........................................... ....18
C1604 TORQUE SENSOR ................................21
DTC Logic ................................................................21
Diagnosis Procedure ...............................................21
C1606 EPS MOTOR ..........................................23
DTC Logic ................................................................23
Diagnosis Procedure ...............................................23
Component Inspection .............................................23
C1607, C1608 EPS CONTROL UNIT ...............25
DTC Logic ................................................................25
Diagnosis Procedure ...............................................25
C1609 VEHICLE SPEED SIGNAL ....................26
Description ...............................................................26
DTC Logic ................................................................26
Diagnosis Procedure ...............................................26
C1610 ENGINE STATUS SIGNAL ...................27
Description ...............................................................27
DTC Logic ................................................................27
Diagnosis Procedure ...............................................27
U1000 CAN COMM CIRCUIT ...........................28
Description ...............................................................28
DTC Logic ................................................................28
Diagnosis Procedure ...............................................28
EPS WARNING LAMP ......................................29
Component Function Check ....................................29
Diagnosis Procedure ...............................................29
SYMPTOM DIAGNOSIS ..............................30
EPS WARNING LAMP DOES NOT TURN ON ...30
Description ........................................................... ....30
Diagnosis Procedure ...............................................30
EPS WARNING LAMP DOES NOT TURN
OFF ....................................................................
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Description ...............................................................31
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PRECAUTIONSSTC-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000012431939
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 severi ty of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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 three mi nutes before performing any service.
Service Notice and Precautions for EPS SystemINFOID:0000000012431940
• Check the following item when performing the trouble diagnosis:
- Check for possible causes of the malfunction by inte rviewing the customer as to what conditions were
present when the symptom occurred.
- Check if the steering wheel and the EPS control unit are genuine parts.
- Check if the air pressure and size of each tire is correct.
- Check if the installation of the links and suspension components are correct.
- Check if the tires are worn evenly, indicating the wheel alignment is correct.
- Check if the installation of the steering column and t he steering gear are correct. Check for loose bolts, dam-
aged links, cracked boots and leaking grease, etc.
- Check for damage or modification to suspension or body resulting in increased weight or altered ground clearance.
- Check if the battery voltage is proper.
- Check the EPS control unit harness to be sure the harness connectors are fully seated.
• Before connecting or disconnecting the EPS control uni t harness connector, turn ignition switch “OFF” and
disconnect the battery cable from the negative terminal. Battery voltage is applied to the EPS control unit
even if ignition switch is turned “OFF”.
Revision: August 2015 2016 Versa Note

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COMPONENT PARTSSTC-5
< SYSTEM DESCRIPTION >
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EPS Control UnitINFOID:0000000012431942
• 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 while
extremely using the power steering function (e.g., full steering)
consecutively for protecting EPS motor and EPS control unit
(Overload protection control).
EPS Motor, Torque Sensor, Reduction GearINFOID:0000000012431943
EPS motor (1), torque sensor (2) and reduction gear (3) 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 transmits 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.
3. ECM • Transmits mainly th
e following signal to EPS control unit via
CAN communication:
- Engine status signal
• For detailed installation location, refer to EC-14, "ENGINE
CONTROL SYSTEM : ComponentPartsLocation".
• Receives mainly the following signal from EPS control unit
via CAN communication:
- EPS torque signal
4. EPS motor Refer to STC-5, "
EPS Motor, Torque Sensor, Reduction
Gear".
5. Reduction gear Refer to STC-5, "
EPS Motor, Torque Sensor, Reduction
Gear".
6. EPS control unit Refer to STC-5, "
EPS Control Unit".
7. Torque sensor Refer to STC-5, "
EPS Motor, Torque Sensor, Reduction
Gear".
No.
Component Function
JSGIA0852ZZ
JSGIA0853ZZ
Revision: August 2015 2016 Versa Note

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STC-6
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
CONSULT FunctionINFOID:0000000012431944
FUNCTION
CONSULT can display each diagnostic item usi ng 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 DIAGNOSTIC RESULT MODE
Refer to STC-10, "DTC Index".
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 detect ed, 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
*1: Almost in accordance with the value of “MOTOR S IG”. It is not a malfunction though these values are not
accorded when steering quickly.
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 MonitorInput/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 tu
rned 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 does 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 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.
Revision: August 2015 2016 Versa Note

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STC-8
< ECU DIAGNOSIS INFORMATION >
EPS CONTROL UNIT
ECU DIAGNOSIS INFORMATION
EPS CONTROL UNIT
Reference ValueINFOID:0000000012431945
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 S IG”. It is not a malfunction though these values are not
accorded when steering quickly.
*2: A fixed value is indicated regardless of steering turning.
*3: Normally displays 100%. In case of an excessive stat ionary steering, the assist curvature gradually falls.
However, it returns to 100% when left standing.
*4: It is not a malfunction, though it might not be co rresponding 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 runningSteering 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 Approx. 0 Nm
*2
C/U TEMPIgnition switch ON or engine running Displays temperature of inside of
EPS control unit (
°C or °F)
ASSIST LEVEL Engine running
100 %
*3
VEHICLE SPEEDVehicle stopped
0 km/h or mph
While driving Approximately equal to the indication
on speedometer*4
(inside of ±
10%)
WARNING LAMP EPS warning lamp: ON
On
EPS warning lamp: OFF Off
ENGINE STATUS Engine not running
Stop
Engine running Run
Revision: August 2015 2016 Versa Note

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EPS CONTROL UNITSTC-9
< ECU DIAGNOSIS INFORMATION >
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TERMINAL LAYOUT
PHYSICAL VALUES
Fail-SafeINFOID:0000000012431946
• If any malfunction occurs in the system and control uni t detects the malfunction, EPS warning lamp on com-
bination meter turns ON to indicate system malfunction.
• When EPS warning lamp is ON, the system enters into a manual steering state. (Steering wheel turning force becomes heavy.)
• Under abnormal vehicle speed signal conditions, vehicle speed is judged as constant.
ALGIA0167ZZ
Te r m i n a l N o .
(Wire Color) Description
ConditionVa l u e
(Approx.)
+ − Signal name Input/Output
1
(P) — CAN-low
Input/Output ——
2
(L) — CAN-high
Input/Output ——
4
(Y) Ground Ignition power supply Input Ignition switch: ON
Battery voltage
Ignition switch: OFF 0 V
13
(R) Ground Torque sensor power
supply
OutputIgnition switch: ON
5 V
Ignition switch: OFF 0 V
14
(Y) Ground Torque sensor sub Input Ignition switch: ON
Steering wheel: Not
steering (There is no
steering force) 2.5 V
Engine running Steering wheel: steer-
ing 1.6 V – 3.4 V
(The value is changed according to steering
left or right)
15
(B) Ground Torque sensor ground Input Always
0 V
16
(W) Ground Torque sensor main Input Ignition switch: ON
Steering wheel: Not
steering (There is no
steering force) 2.5 V
Engine running Steering wheel: steer-
ing 1.6 V – 3.4 V
(The value is changed according to steering left or right)
17
(R) Ground Battery power supply Input Always
Battery voltage
18
(B) Ground Ground
— Always 0 V
19
(R) —
Motor —— —
20
(B) —
Motor —— —
Revision: August 2015
2016 Versa Note

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STC-10
< ECU DIAGNOSIS INFORMATION >
EPS CONTROL UNIT
Protection Function
INFOID:0000000012431947
EPS control unit decreases the output signal to EPS mo tor 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.
DTC Inspection Priority ChartINFOID:0000000012431948
When multiple DTCs are detected simultaneously, c heck one by one depending on the following priority list:
DTC IndexINFOID:0000000012431949
Priority Priority order item (DTC)
1 U1000 CAN COMM CIRCUIT
2 C1609 CAN VHCL SPEED, C1610 CAN ENG RPM
3 C1601 BATTERY VOLT
4 Other than the above
DTC Items (CONSULT screen terms) Reference
C1601 BATTERY VOLT STC-18, "
DTC Logic"
C1604TORQUE SENSOR STC-21, "DTC Logic"
C1606EPS MOTOR STC-23, "DTC Logic"
C1607EEPROM STC-25, "DTC Logic"
C1608CONTROL UNIT STC-25, "DTC Logic"
C1609CAN VHCL SPEED STC-26, "DTC Logic"
C1610CAN ENG RPM STC-27, "DTC Logic"
U1000CAN COMM CIRCUIT STC-28, "DTC Logic"
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STC-20
< DTC/CIRCUIT DIAGNOSIS >
C1601 BATTERY POWER SUPPLY
NO >> Repair or replace malfunctioning component.
6.CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect torque sensor harness connector.
3. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
Is the inspection result normal?
YES >> Replace EPS control unit. Refer to STC-37, "Removal and Installation".
NO >> Repair or replace malfunctioning component.
Revision: August 2015 2016 Versa Note

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