SUNROOF
RF-21
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2. CHECK DOOR SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door switch and BCM.
3. Check continuity between BCM connector M18, M19 terminals
12, 47 and door switch connectors B8, B108 terminal 2.
4. Check continuity between BCM connector M18, M19 terminals
12, 47 and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK DOOR SWITCH
Check continuity between door switches terminal 2 and ground part
of door switch.
OK or NG
OK >> GO TO 4.
NG >> Replace malfunctioning door switch.
4. CHECK BCM OUTPUT SIGNAL
1. Connect BCM.
2. Check voltage between BCM connector M18, M19 terminals 12,
47 and ground.
OK or NG
OK >> Further inspection is necessary. Refer to RF-17, "Trou-
ble Diagnosis Chart by Symptom" .
NG >> Replace BCM. Refer to BCS-25, "
Removal and Installa-
tion of BCM" . Front door LH
47 - 2 : Continuity should exist.
Front door RH
12 - 2 : Continuity should exist.
12 - Ground : Continuity should not exist.
47 - Ground : Continuity should not exist.
WIIA0626E
Terminal Door switch Continuity
2Ground part of
door switchPushed No
Released Yes
LIIA2377E
12 - Ground : Battery voltage
47 - Ground : Battery voltage
WIIA0234E
STARTING SYSTEM
SC-21
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DIAGNOSTIC PROCEDURE 2
Check Magnetic Switch Circuit
1. CHECK POWER SUPPLY TO MAGNETIC SWITCH
1. Remove the fuel pump fuse.
2. Crank or start the engine (where possible) until the fuel pressure is released.
3. Turn the ignition switch OFF.
4. Disconnect starter motor connector F28.
5. Check voltage between starter motor connector F28 terminal S
and ground using a digital circuit tester.
OK or NG
OK >> GO TO 2.
NG >> Check the following:
40A fusible link (letter h , located in fuse and fusible
link box)
10A fuse (No. 49, M/T models, located in the IPDM E/
R)
15A fuse (No. 52, located in the IPDM E/R)
20A fuse (No. 53, located in the IPDM E/R)
PNP switch, clutch interlock switch or TCM depending on equipment
Ignition switch
Ignition relay IPDM E/R
Starter relay IPDM E/R
Starter relay request ON signal from BCM
Harness for open or short circuit
2. CHECK VOLTAGE DROP ON MAGNETIC SWITCH CIRCUIT
1. Connect starter motor connector F28.
2. Check voltage between starter motor connector F28 terminal S
and battery positive terminal using a digital circuit tester.
OK or NG
OK >> Magnetic switch circuit is OK. Further inspection is nec-
essary. Refer to SC-19, "
WORK FLOW" .
NG >> Check harness, components and connections between
the battery and the magnetic switch for poor continuity. Ignition switch in
START: Battery voltage
WKIA5243E
Ignition switch in
START: Less than 1V
WKIA5244E
TROUBLE DIAGNOSIS
SRS-19
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CONSULT-II Function (AIR BAG)EHS001V1
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
HOW TO CHANGE BETWEEN SELF-DIAGNOSIS MODE AND USER MODE WITH CONSULT-II
From User Mode to Diagnosis Mode
After selecting “AIR BAG” on the “SELECT SYSTEM” screen, User mode automatically changes to Diagnosis
mode.
From Diagnosis Mode to User Mode
To return to User mode from Diagnosis mode, touch “BACK” key of CONSULT-II until “SELECT SYSTEM”
appears, Diagnosis mode automatically changes to User mode.
AIR BAG diagnostic mode Description
SELF-DIAG [CURRENT]A current Self-diagnosis result is displayed on the CONSULT-II screen in real time. This refers to a
malfunctioning part requiring replacement.
SELF-DIAG [PAST]Diagnosis results previously stored in the memory are displayed on the CONSULT-II screen. The
stored results will remain until the memory is erased.
TROUBLE DIAG RECORDWith TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-II screen.
ECU DISCRIMINATED NO.The air bag diagnosis sensor unit for each vehicle
model is assigned with its own, individual classifi-
cation number. This number will be displayed on
the CONSULT-II screen, as shown. When replac-
ing the air bag diagnosis sensor unit, refer to the
part number for the compatibility. After installation,
replacement with a correct unit can be checked by
confirming this classification number on the CON-
SULT-II screen.
The air bag diagnosis sensor unit discrimi-
nated number assigned is F636.
PASSENGER AIR BAGThe STATUS (readiness) of the front passenger air
bag module is displayed. The STATUS displayed
(ON/OFF) depends on the signals supplied to the
occupant classification system control module and
air bag diagnosis sensor unit. Refer to SRS-6,
"Occupant Classification System (OCS)" f o r mo re
information.
ARS3 66
WHIA0290E
SRS8 03
SRS-44
SPIRAL CABLE
Revision: June 20062007 Versa
SPIRAL CABLEPFP:25554
Removal and InstallationEHS001UE
REMOVAL
WAR NIN G:
When servicing the SRS, do not work from directly in front of air bag module.
CAUTION:
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at
least 3 minutes.
Do not tap or bump the steering wheel.
Do not disassemble the spiral cable.
Do not allow oil, grease or water to come in contact with the spiral cable.
Replace the spiral cable if it has been dropped or sustained an impact.
With the steering linkage disconnected, the spiral cable may snap by turning the steering wheel
beyond the limited number of turns. The spiral cable can be turned counterclockwise about 2.5
turns from the neutral position.
1. Disconnect the negative and positive battery cables, then wait at least 3 minutes.
2. Set the front wheels to the straight-ahead/neutral position.
3. Remove the steering wheel. Refer to PS-6, "
STEERING WHEEL" .
4. Remove the column cover upper and lower.
LHIA0113E
1. Nut, refer to PS-6, "STEERING
WHEEL"
2. Steering wheel 3. Lighting and turn signal switch
4. Spiral cable 5. Driver air bag module connectors 6. Wiper and washer switch
7. Column cover lower 8. Steering lock escutcheon 9. Steering column assembly
10. Column cover upper Pawl
SPIRAL CABLE
SRS-45
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5. Disconnect wiper and washer switch connector (1). Then while
pressing tabs (2), pull wiper and washer switch away from spiral
cable to remove.
6. Disconnect lighting and turn signal switch connector (1). Then
while pressing tabs (2), pull lighting and turn signal switch
toward driver door to remove.
7. Remove the screws, then release the tab at the top and pull the
spiral cable away from the steering column assembly.
8. Disconnect spiral cable connectors.
INSTALLATION
Installation is in the reverse order of removal.
Align spiral cable correctly when installing steering wheel, refer
to PS-6, "
STEERING WHEEL" . Make sure spiral cable align-
ment and centering marks (B) are matched and in the neutral
position. The neutral position is detected by turning left 2.6 revo-
lutions from the right end position, ending with the locating pin
(A) at the top. Place steering wheel in straight ahead position,
then install it with the locating pin hole (C) directly over spiral
cable locating pin.
After the work is completed, perform self-diagnosis to make sure
no malfunction is detected. Refer to SRS-21, "
SRS Operation
Check" .
WHIA0315E
WHIA0316E
PHIA1024J
STC-1
STEERING CONTROL SYSTEM
G STEERING
CONTENTS
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STC
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EPS
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions Necessary for Steering Wheel Rotation
After Battery Disconnect .......................................... 3
OPERATION PROCEDURE ................................. 3
Service Notice or Precautions for EPS System ....... 4
EPS SYSTEM ............................................................. 5
System Description .................................................. 5
EPS CONTROL UNIT ........................................... 5
EPS MOTOR ......................................................... 5
TORQUE SENSOR ............................................... 5
REDUCTION GEAR .............................................. 5
EPS WARNING LAMP .......................................... 5
System Diagram ....................................................... 6
COMPONENTS FUNCTION DESCRIPTION ....... 6
CAN Communication ................................................ 6
SYSTEM DESCRIPTION ...................................... 6
TROUBLE DIAGNOSIS .............................................. 7
Fail-Safe Function .................................................... 7
How to Perform Trouble Diagnosis .......................... 7
BASIC CONCEPT ................................................. 7
PRECAUTIONS FOR TROUBLE DIAGNOSIS ..... 7
INTERVIEW .......................................................... 7
Component Parts Location ....................................... 8
Wiring Diagram — EPS — ....................................... 9
EPS Control Unit Input/Output Signal Reference
Values .....................................................................11
SPECIFICATIONS WITH CONSULT-II ................11
SPECIFICATIONS BETWEEN EPS CONTROL
UNIT TERMINALS .............................................. 12
CONSULT-II Function (EPS) .................................. 13
FUNCTION .......................................................... 13
CONSULT-II SETTING PROCEDURE ................ 13
SELF-DIAG RESULTS MODE ............................ 13
DATA MONITOR ................................................. 14
EPS CONTROL UNIT PART NUMBER .............. 14
Symptom Chart ...................................................... 15TROUBLE DIAGNOSIS FOR SYSTEM .................... 16
DTC C1601 BATTERY VOLT ................................. 16
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 16
EPS CONTROL UNIT TERMINALS AND REF-
ERENCE VALUE ................................................. 16
DIAGNOSTIC PROCEDURE .............................. 17
DTC C1604 TORQUE SENSOR ............................ 19
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 19
EPS CONTROL UNIT TERMINALS AND REF-
ERENCE VALUE ................................................. 19
DIAGNOSTIC PROCEDURE .............................. 19
DTC C1606 EPS MOTOR ...................................... 21
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 21
EPS CONTROL UNIT TERMINALS AND REF-
ERENCE VALUE ................................................. 21
DIAGNOSTIC PROCEDURE .............................. 21
DTC C1607 EEPROM ............................................ 22
DIAGNOSTIC PROCEDURE .............................. 22
DTC C1608 CONTROL UNIT ................................. 22
DIAGNOSTIC PROCEDURE .............................. 22
DTC C1609 CAN VHCL SPEED ............................ 23
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 23
DIAGNOSTIC PROCEDURE .............................. 23
DTC C1610 CAN ENG RPM .................................. 24
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 24
DIAGNOSTIC PROCEDURE .............................. 24
DTC U1000 CAN COMM CIRCUIT ........................ 24
DIAGNOSTIC PROCEDURE .............................. 24
Component Inspection ............................................ 25
EPS MOTOR ....................................................... 25
TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 26
EPS Warning Lamp Does Not Turn ON ................. 26
SYMPTOM: ......................................................... 26
DIAGNOSTIC PROCEDURE .............................. 26
EPS Warning Lamp Does Not Turn OFF ................ 27
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]
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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