2006 NISSAN VERSA ignition

SRS-50
SIDE AIR BAG (SATELLITE) SENSOR
Revision: June 20062007 Versa
SIDE AIR BAG (SATELLITE) SENSORPFP:98830
Removal and InstallationEHS001UI
REMOVAL
WAR NIN G:
Do not reuse center pillar upper garnish if removed.
CAUTION:

Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at
least 3 minutes.

Do not disassemble the side air bag (satellite) sensor.

Do not use old nuts after removal; replace with new nuts.

Replace the side air bag (satellite) sensor if it has been
dropped or sustained an impact.

Check side air bag (satellite) sensor to make sure it is free
of deformities, dents, cracks or rust. If it shows any visible
signs of damage, replace it with a new one.
1. Disconnect both the negative and positive battery cables, then wait at least 3 minutes.
2. Remove the front seat belt retractor. Refer to SB-3, "
Removal and Installation of Front Seat Belt" .
3. Remove the nuts (1) and remove side air bag (satellite) sensor
(2).
⇐: Vehicle front
4. Disconnect the side air bag (satellite) sensor harness connector
(3).
INSTALLATION
Installation is in the reverse order of removal.

After the work is completed, perform self-diagnosis to make sure no malfunction is detected. Refer to
SRS-21, "
SRS Operation Check" .
WHIA0321E
WHIA0322E

SRS-52
DIAGNOSIS SENSOR UNIT
Revision: June 20062007 Versa
DIAGNOSIS SENSOR UNITPFP:28556
Removal and InstallationEHS001UK
REMOVAL
WAR NIN G:
Before disconnecting diagnosis sensor unit harness connector(s), be sure to disconnect harness con-
nectors from air bag modules and front seat belt pre-tensioner to prevent deployment by static elec-
tricity.
CAUTION:

Before servicing the SRS, turn the ignition switch OFF, disconnect both battery cables and wait at
least 3 minutes.

Do not disassemble diagnosis sensor unit.

Do not use old bolts; replace with new bolts.

Replace the diagnosis sensor unit if it has been dropped or sustained an impact.

Check diagnosis sensor unit bracket to make sure it is free of deformities, dents, cracks or rust. If
it shows any visible signs of damage, replace with new one.

The diagnosis sensor unit must always be installed with the arrow mark "⇐" pointing toward the
front of the vehicle for proper operation.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Disconnect the harness connectors for each air bag module and seat belt pre-tensioner. Refer to SRS-41,
"DRIVER AIR BAG MODULE" , SRS-46, "FRONT PASSENGER AIR BAG MODULE" , SRS-47, "SIDE
CURTAIN AIR BAG MODULE" , SRS-51, "FRONT SEAT BELT PRE-TENSIONER" .
3. Remove center console assembly. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
4. Disconnect diagnosis sensor unit connectors.
5. Remove the bolts and the ground bolt, then remove the diagnosis sensor unit.
INSTALLATION
Installation is in the reverse order of removal.

The diagnosis sensor unit must always be installed with the arrow mark "⇐" pointing toward the front of
the vehicle.

Follow the tightening sequence 1,2,3,4 as shown.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-21, "
SRS Operation Check" .
ECU DISCRIMINATED NO.
After replacing the diagnosis sensor unit, confirm that the diagnosis sensor unit identification is correct for the
vehicle as equipped. Refer to SRS-19, "
CONSULT-II Function (AIR BAG)" .
1. Diagnosis sensor unit connectors 2. Ground Bolt 3. Bolt
4. Diagnosis sensor unit⇐Vehicle front
WHIA0323E

PRECAUTIONS
STC-3
[EPS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: June 20062007 Versa
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
UGS000A8
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 and SB section of this Service Man-
ual.
WA RN ING:

To avoid rendering the SRS inoperative, 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 per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions Necessary for Steering Wheel Rotation After Battery DisconnectUGS000A9
NOTE:

This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).

Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.

Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.

STC-4
[EPS]
PRECAUTIONS
Revision: June 20062007 Versa
Service Notice or Precautions for EPS SystemUGS0008F
CAUTION:
Check or confirm 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 malfunction, such as EPS warning lamp turns ON, occurs.

Check if air pressure and size of tires are proper, the specified part is used for the steering wheel,
and control 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 discon-
nect 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 termi-
nals (bend or break).
When connecting pin connectors, make sure that there are
no bends or breaks on EPS control unit pin terminal.

Before replacing EPS control unit, perform EPS control unit
input/output signal inspection and make sure whether EPS
control unit functions properly or not. Refer to STC-11,
"EPS Control Unit Input/Output Signal Reference Values" .
SEF 2 89 H
SEF 2 91 H
SDIA1848E

EPS SYSTEM
STC-5
[EPS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: June 20062007 Versa
EPS SYSTEMPFP:28500
System DescriptionUGS000A5
EPS CONTROL UNIT

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 to the EPS motor according to the driving
condition.

EPS control unit decreases the output to EPS motor while
extremely using the power steering function (e.g., full steering)
for protecting EPS motor and EPS control unit (Protect overload
status). While activating protect overload status, the assist
torque gradually decreases, and the steering wheel turning force
becomes heavy. The normal assist torque reactivates by not
steering.

In case of an error in the electrical system, the fail-safe function stops output signals to the EPS motor.
Then the previous state is changed to the manual steering state.

Self-diagnosis can be done with CONSULT-II.
EPS MOTOR
EPS motor provides the assist torque by 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.
EPS WARNING LAMP
Turns ON when there is a malfunction in EPS system. It 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.
EPS Warning Lamp Indication
SGIA1647E
SGIA1648E
Condition EPS warning lamp
Lamp checkTurns ON when ignition switch is turned ON.
Turns OFF after engine start.
EPS system malfunctionON
Other than above (system normal) OFF

TROUBLE DIAGNOSIS
STC-11
[EPS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: June 20062007 Versa
EPS Control Unit Input/Output Signal Reference ValuesUGS0007X
SPECIFICATIONS WITH CONSULT-II
CAUTION:
The output signal indicates the EPS control unit calculation date. The normal values will be displayed
even in the event that the output circuit (harness) is open.
*1 : In the front of the value, “L” is displayed at steering left and “R” is displayed at steering right.
*2 : Almost in accordance with the value of “MOTOR SIG”. It is not a malfunction though these values are not accorded when steering
quickly.
*3 : It is not a malfunction, though it might not be corresponding just after ignition switch is turned ON.
*4 : It turns to OFF after waiting for a short period of time.Monitor item (Unit) Content Condition Display value
MOTOR VOL (V)Power supply voltage for
EPS control unitIgnition switch: ON Battery voltage
TORQUE SENSOR (Nm)Steering wheel turning
forceEngine runningSteering wheel: Not
steering (There is no
steering force) 0.00 Nm
Steering wheel: Steer-
ing0 – 8.19 Nm
*1 (The value
is changed according to
steering left or right)
MOTOR SIG (A)Command current to EPS
motorEngine runningSteering wheel: Not
steering (There is no
steering force)0.00 A
Steering wheel: Steer-
ing0 – 65.00 A (The value is
changed according to
steering left or right)
MOTOR CURRENT (A)Consumption current of
EPS motorEngine runningSteering wheel: Not
steering (There is no
steering force)0.00 A
Steering wheel: Steer-
ing0 – 65.00 A
*2 (The value
is changed according to
steering left or right)
VEHICLE SPEED (km/h) or (mph) Vehicle speedVehicle stopped 0 km/h (0 mph)
While drivingApproximately equal to
the indication on speed-
ometer (Inside of ±10%)
*3
WARNING LAMP (ON/OFF)EPS warning lamp condi-
tionEPS warning lamp: ON ON
EPS warning lamp: OFF OFF
DERATING STAT (ON/OFF) Protect overload status Engine runningSteering wheel: Nor-
mal steeringOFF
Steering wheel: Steer-
ing over the stopON
*4
ENGINE STATUS (RUN/STOP) Engine statusEngine stopped
(Engine speed: Less than 400 rpm)STOP
Engine running
(Engine speed: 400 rpm or more)RUN

STC-12
[EPS]
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
SPECIFICATIONS BETWEEN EPS CONTROL UNIT TERMINALS
EPS Control Unit Terminal Connector Layout
Data are reference value and are measured.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
SGIA1624E
Te r m i n a lWire
colorItem Condition Data (Approx.)
4 V Torque sensor sub Engine runningSteering wheel: Not steering
(There in no steering force)2.5 V
Steering wheel: Steering1.7 V – 3.3 V
(The value is changed accord-
ing to steering left or right)
5 BR Torque sensor power supplyIgnition switch: ON 8 V
Ignition switch: OFF 0 V
6 G Torque sensor main Engine runningSteering wheel: Not steering
(There is no steering force)2.5 V
Steering wheel: Steering1.7 V – 3.3 V
(The value is changed accord-
ing to steering left or right)
7 R Torque sensor ground Always 0 V
9 L CAN-H — —
10 O Power supplyIgnition switch: ON Battery voltage
Ignition switch: OFF 0 V
16 P CAN-L — —
17 R Power supply (Memory back-up)Ignition switch: ON Battery voltage
Ignition switch: OFF Battery voltage
18 B Ground Always 0 V
19 — Motor (+) — —
20 — Motor (–) — —

TROUBLE DIAGNOSIS
STC-13
[EPS]
C
D
E
F
H
I
J
K
L
MA
B
STC
Revision: June 20062007 Versa
CONSULT-II Function (EPS)UGS0007Y
FUNCTION
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
SELF-DIAG RESULTS MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. With engine at idle, touch “SELF-DIAG RESULTS”. Display
shows malfunction experienced since the last erasing operation.
NOTE:

When malfunction occurred at the same time, it is dis-
played to a 3 system at the maximum.

The details for “TIME” are as follow:
–“0”: Error currently detected with EPS control unit.
–Except for “0”: Error detected in the past and memorized
with EPS control unit.
Detects frequency of driving after DTC occurs (frequency
of turning ignition switch “ON”).
Display Item List
CAUTION:
If “CAN COMM CIRCUIT [U1000]” is displayed with other DTCs, first perform the trouble diagnosis for CAN communication
line.
How to Erase Self-Diagnostic Results
1. Perform applicable inspection of malfunctioning item and then repair or replace.
Diagnostic test mode Function Reference page
Self-diagnostic results

Self-diagnostic results can be read and erased quickly.STC-13
Data monitor
Input/Output data in the EPS control unit can be read.STC-14
CAN diagnostic support monitor
The results of transmit/receive diagnosis of CAN communication can be read.LAN-44
ECU part number
EPS control unit part number can be read.STC-14
SGIA1531E
Item
(CONSULT-II screen terms)Diagnostic item is detected when.... Check item
BATTERY VOLT
[C1601]When the power supply malfunction supplied to EPS control unit is
detected.STC-16, "
DTC C1601
BATTERY VOLT"
TORQUE SENSOR
[C1604]When the torque sensor malfunction assembled in steering column
assembly is detected. STC-19, "DTC C1604
TORQUE SENSOR"
EPS MOTOR
[C1606]When the motor driver malfunction of EPS control unit or EPS motor
malfunction is detected.STC-21, "DTC C1606
EPS MOTOR"
EEPROM
[C1607]When the memory (EEPROM) system malfunction is detected in
EPS control unit.STC-22, "DTC C1607
EEPROM"
CONTROL UNIT
[C1608]When the internal malfunction is detected in EPS control unit.STC-22, "DTC C1608
CONTROL UNIT"
CAN VHCL SPEED
[C1609]When the malfunction is detected in vehicle speed signal received
with CAN communication.STC-23, "DTC C1609
CAN VHCL SPEED"
CAN ENG RPM
[C1610]When the malfunction is detected in engine status signal received
with CAN communication.STC-24, "DTC C1610
CAN ENG RPM"
CAN COMM CIRCUIT
[U1000]When EPS control unit is not transmitting or receiving CAN commu-
nication signal 2 seconds or more.STC-24, "DTC U1000
CAN COMM CIRCUIT"
NO DTC IS DETECTED.
FURTHER TESTING MAY BE
REQUIRED.No NG item has been detected. —