ECO mode NISSAN TEANA 2003 Workshop Manual
[x] Cancel search | Manufacturer: NISSAN, Model Year: 2003, Model line: TEANA, Model: NISSAN TEANA 2003Pages: 3502, PDF Size: 74.56 MB
Page 451 of 3502
TROUBLE DIAGNOSIS
ATC-73
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SYSTEM DESCRIPTION
Component Parts
Fan speed control system components are:
Unified meter and A/C amp.
A/C LAN system (PBR built-in mode door motor, air mix door motor and intake motor)
Fan control amp.
In-vehicle sensor
Ambient sensor
Sunload sensor
Intake sensor
System Operation
Automatic Mode
In the automatic mode, the blower motor speed control signal is calculated by the unified meter and A/C amp.
based on the input from the PBR, in-vehicle sensor, sunload sensor, intake sensor and ambient sensor.
The blower motor applied voltage ranges from approximately 3.5 volts (lowest speed) to 12 volts (highest
speed).
The control blower speed (in the range of 3.5 to 12 V), unified meter and A/C amp. supplies a gate voltage to
the fan control amp. Based on this voltage, fan control amp. controls voltage supplied to the blower motor.
Starting Fan Speed Control
Start up from COLD SOAK Condition (Automatic mode)
In a cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower will not
operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient and engine coolant temperature.
In the most extreme case (very low ambient) the blower starting delay will be 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C (133°F), and then the blower speed will increase to the objective speed.
Start up from usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the AUTO switch is pressed. The blower speed will gradu-
ally rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).
RJIA3262E
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TROUBLE DIAGNOSIS
ATC-81
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7. CHECK VOLTAGE FOR UNIFIED METER AND A/C AMP. (COMPRESSOR ON SIGNAL)
1. Reconnect BCM connector and unified meter and A/C amp.
connector.
2. Turn ignition switch ON.
3. Check voltage between unified meter and A/C amp. harness
connector M45 terminal 42 and ground.
OK or NG
OK >> GO TO 8.
NG-1 >> If the voltage is approx. 5 V when A/C switch is ON: Replace unified meter and A/C amp.
NG-2 >> If the voltage is approx. 0 V when A/C switch is OFF: Replace BCM.
8. CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-II
1. Start the engine.
2. Check voltage of refrigerant pressure sensor. Refer to EC-90,
"CONSULT-II Reference Value in Data Monitor Mode" (QR
engine) or EC-434, "
CONSULT-II Reference Value in Data Mon-
itor Mode" (VQ engine).
WITHOUT CONSULT-II
1. Start the engine.
2. Check voltage between ECM harness connector F101 terminal
70 and ground.
OK or NG
OK >>WITH CONSULT-II: GO TO 9.
WITHOUT CONSULT-II: GO TO 10.
NG >> Refer to EC-339, "
REFRIGERANT PRESSURE SENSOR" (QR engine) or EC-748, "REFRIGER-
ANT PRESSURE SENSOR" (VQ engine).
Te r m i n a l s
Condition Voltage (+)
(-) Unified meter
and A/C amp.
connectorTerminal
No.
M45 42 GroundA/C switch: ON
(Blower motor oper-
ates.)Approx. 0 V
OFF switch: ON (A/C
System: OFF)Approx. 5 V
RJIA2007E
Terminals
Condition Voltage (+)
(-)
ECM con-
nectorTerminal No.
F10169 (QR engine)
GroundA/C switch: ON
(Blower motor
operates.)Approx. 1.0 - 4.0 V
70 (VQ engine)
SJIA1723E
Page 526 of 3502
ATC-148
REFRIGERANT LINES
CHECKING PROCEDURE
To prevent inaccurate or false readings, make sure there is no refrigerant vapor, shop chemicals, or cigarette
smoke in the vicinity of the vehicle. Perform the leak test in calm area (low air/wind movement) so that the
leaking refrigerant is not dispersed.
1. Stop the engine.
2. Connect a suitable A/C manifold gauge set (SST) to the A/C service valves.
3. Check if the A/C refrigerant pressure is at least 345 kPa (3.45 bar, 3.52 kg/cm
2 , 50 psi) above 16°C
(61°F). If less than specification, recover/evacuate and recharge the system with the specified amount of
refrigerant.
NOTE:
At temperatures below 16°C (61°F), leaks may not be detected since the system may not reach 345 kPa
(3.45 bar, 3.52 kg/cm
2 , 50 psi).
4. Perform the leak test from the high-pressure side (compressor discharge a to evaporator inlet g) to the
low-pressure side [evaporator drain hose h to shaft seal l (QR engine) or m (VQ engine)]. Refer to AT C -
133, "Components" . Perform a leak check for the following areas carefully. Clean the component to be
checked and move the leak detected probe completely around the connection/component.
Compressor
Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal.
Condenser
Check the fitting of high-pressure flexible hose and pipe, refrigerant pressure sensor.
Liquid tank
Check the fitting of refrigerant connection.
Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to pre-
vent leaks).
NOTE:
After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any
false readings by leak detector.
Cooling unit (Evaporator)
With engine OFF, turn blower fan on “High” for at least 15 seconds to dissipate any refrigerant trace in the
cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer’s recommended
procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.
5. If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected
leak, then repeat check as outlined above.
6. Do not stop when one leak is found. Continue to check for additional leaks at all system components.
If no leaks are found, perform steps 7 - 10.
7. Start the engine.
8. Set the A/C control as follows;
a. A/C switch: ON
b. Mode door position: VENT (Ventilation)
c. Intake door position: Recirculation
d. Temperature setting: Max. cold
e. Fan speed: High
9. Run engine at 1,500 rpm for at least 2 minutes.
Page 530 of 3502
AV-2 Component Description .......................................... 41
DISPLAY UNIT .................................................... 41
A/C AND AV SWITCH ......................................... 41
CAN Communication Unit ....................................... 41
Component Parts Location ..................................... 41
Schematic ............................................................... 42
Wiring Diagram — INF/D — ................................... 43
Schematic ............................................................... 48
Wiring Diagram — COMM — ................................. 49
Terminals and Reference Value for Display Unit .... 52
Terminals and Reference Value for A/C and AV
Switch ..................................................................... 53
A/C and AV Switch Self-Diagnosis Function ........... 54
STARTING THE SELF-DIAGNOSIS MODE ........ 54
DIAGNOSIS FUNCTION ..................................... 54
EXITING THE SELF-DIAGNOSIS MODE ........... 54
On Board Self-Diagnosis Function ......................... 55
DESCRIPTION .................................................... 55
DIAGNOSIS ITEM ............................................... 55
Self-Diagnosis Mode .............................................. 55
OPERATION PROCEDURES ............................. 55
EXITING THE SELF-DIAGNOSIS MODE ........... 56
Symptom Chart ....................................................... 57
Unable to Operate System with A/C and AV Switch ... 58
Removal and Installation of Display Unit ................ 60
REMOVAL ........................................................... 60
INSTALLATION .................................................... 60
Removal and Installation of A/C and AV Switch ..... 60
REMOVAL ........................................................... 60
INSTALLATION .................................................... 60
INTEGRATED COLOR DISPLAY SYSTEM .............. 61
System Description ................................................. 61
INTEGRATED COLOR DISPLAY SYSTEM ........ 61
REAR VIEW MONITOR ...................................... 61
Component Description .......................................... 62
DISPLAY CONTROL UNIT .................................. 62
DISPLAY .............................................................. 62
A/C AND AV SWITCH ......................................... 62
REAR VIEW CAMERA ........................................ 62
REAR VIEW CAMERA CONTROL UNIT ............ 63
CAN Communication Unit ....................................... 63
Component Parts Location ..................................... 63
Schematic — INF/D — ........................................... 64
Wiring Diagram — INF/D — ................................... 65
Schematic — COMM — ......................................... 72
Wiring Diagram — COMM — ................................. 73
Terminals and Reference Value for Display Control
Unit ......................................................................... 77
Terminals and Reference Value for Display ............ 80
Terminals and Reference Value for A/C and AV
Switch ..................................................................... 82
Terminals and Reference Value for Rear View Cam-
era Control Unit ...................................................... 83
Special Note for Trouble Diagnosis ........................ 84
A/C and AV Switch Self-Diagnosis Function ........... 84
STARTING THE SELF-DIAGNOSIS MODE ........ 84DIAGNOSIS FUNCTION ..................................... 84
EXITING THE SELF-DIAGNOSIS MODE ........... 84
On Board Self-Diagnosis Function .......................... 85
DESCRIPTION .................................................... 85
DIAGNOSIS ITEM ............................................... 85
OPERATION PROCEDURE ................................ 86
Self-Diagnosis Mode ............................................... 87
DIAGNOSIS PROCEDURE ................................. 87
SELF-DIAGNOSIS RESULT ................................ 88
Confirmation Mode .................................................. 89
DIAGNOSIS PROCEDURE ................................. 89
DCU ..................................................................... 89
HVAC ................................................................... 92
CAN DIAGNOSIS ................................................ 93
CONSULT-II Functions (REAR VIEW CAMERA) .... 94
CONSULT-II BASIC OPERATION PROCEDURE
... 94
WORK SUPPORT ............................................... 94
DATA MONITOR .................................................. 94
Vehicle Width and Distance Guiding Line Correction ... 95
DESCRIPTION .................................................... 95
VEHICLE WIDTH AND DISTANCE GUIDING
LINE CORRECTION PROCEDURE .................... 95
Unable to Operate System with A/C and AV Switch ... 97
All Images Are Not Displayed ................................. 99
Rear View Image Is Not Displayed (RGB Image Is
Displayed) .............................................................101
When Displaying Rear View Image, SETTING
Menu Is Not Displayed ..........................................106
Tint Is Strange for The RGB Image .......................107
RGB Image Is Rolling ...........................................109
Values for All Items in The TRIP Screen Do Not
Change .................................................................110
Values for Items, “Driving Distance” and “Average
Speed” Do Not Change .........................................110
Values for All Items in The FUEL ECONOMY Screen
Do Not Change .....................................................110
Example of Symptoms Possible No Malfunction .. 111
DISPLAY ............................................................ 111
REAR VIEW MONITOR ..................................... 111
Removal and Installation of A/C and AV Switch ....112
REMOVAL ..........................................................112
INSTALLATION ..................................................112
Removal and Installation of Display ......................112
REMOVAL ..........................................................112
INSTALLATION ..................................................112
Removal and Installation of Display Control Unit ..112
REMOVAL ..........................................................112
INSTALLATION ..................................................112
Removal and Installation of Rear View Camera ...113
REMOVAL ..........................................................113
INSTALLATION ..................................................113
Removal and Installation of Rear View Camera Con-
trol Unit ..................................................................113
REMOVAL ..........................................................113
INSTALLATION ..................................................113
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INTEGRATED DISPLAY SYSTEM
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Symptom ChartBKS0022B
Symptom Check item
All images are not displayed.
Display unit power supply and ground circuit
Display unit
Screen does not switch to nighttime mode after the
lighting switch is turned ON.
Display unit Illumination signal circuit
Display unit
TRIP and FUEL ECON screen do not appear.
Display unit ignition signal circuit
Display unit
Trip odometer (DIST) indication is malfunction-
ing.
Average vehicle speed (AVG) indication is mal-
functioning.
Vehicle speed signal circuit between unified meter and A/C amp. and display
unit
Display unit
Unified meter and A/C amp.
Average fuel consumption (AVG) indication is mal-
functioning.
Vehicle speed signal circuit between unified meter and A/C amp. and display
unit
CAN communication signal circuit
NOTE:
Diagnosis Procedure
Connect CONSULT-II. Select “METER A/C AMP”, and then, select “SELF-
DIAG RESULTS”. Check that “CAN COMM CIRC [U1000]” is indicated as the
diagnosis result. The communication with the unified meter and A/C amp. is
normal if not indicated. Repair the root cause if indicated. Refer to DI-32, "
DTC
[U1000] CAN Communication Circuit" .
Display unit
Unified meter and A/C amp.
Distance to empty (DTE) indication is malfunction-
ing.
CAN communication signal circuit
NOTE:
Diagnosis Procedure
Connect CONSULT-II. Select “METER A/C AMP”, and then, select “SELF-
DIAG RESULTS”. Check that “CAN COMM CIRC [U1000]” is indicated as the
diagnosis result. The communication with the unified meter and A/C amp. is
normal if not indicated. Repair the root cause if indicated. Refer to DI-32, "
DTC
[U1000] CAN Communication Circuit" .
Display unit
Unified meter and A/C amp.
Unable to operate system with A/C and AV switch. Refer to AV- 5 8 , "
Unable to Operate System with A/C and AV Switch"
Page 622 of 3502
AV-94
INTEGRATED COLOR DISPLAY SYSTEM
CONSULT-II Functions (REAR VIEW CAMERA)BKS00281
CONSULT-II can display each diagnosis item using the diagnosis test modes shown following.
CONSULT-II BASIC OPERATION PROCEDURE
Refer to GI-34, "CONSULT-II Start Procedure" .
WORK SUPPORT
Operation Procedure
1. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen.
2. Touch “SELECT GUIDELINE PATTERN” or “ADJ GUIDELINE POSITION” on “SELECT WORK ITEM”
screen.
For details, refer to AV- 9 5 , "
Vehicle Width and Distance Guiding Line Correction" .
DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Touch either “ALL SIGNALS” or “SELECTION FROM MENU” on “SELECT MONITOR ITEM” screen.
3. When “SELECTION FROM MENU” is selected, touch individual items to be monitored. When “ALL SIG-
NALS” is selected, all the items will be monitored.
4. Touch “START”.
5. Touch “RECORD” while monitoring, then the status of the monitored item can be recorded. To stop
recording, touch “STOP”.
Display Item List
Diagnosis partCheck Item,
Diagnosis ModeDescription
REAR VIEW CAMERAWORK SUPPORT It can adjust the vehicle width and distance guiding lines that overlap camera image.
DATA MONITOR Displays input data for rear view camera control unit in real-time.
ECU PART NUMBER Displays rear view camera control unit part number.
Item Description
SELECT GUIDELINE PATTERN The opening of the vehicle width and distance guiding lines can be selected from 2 patterns.
ADJ GUIDELINE POSITION Make fine adjustment to the vehicle width and distance guiding lines upper/lower/left/right
Item Description
ALL SIGNALS Monitors all the signal.
SELECTION FROM MENU Selects and monitors individual items.
Item Description
R POSI SIG [ON/OFF]“ON (Selector lever R position)/OFF (other than R position)” status as judged from the reverse
signal is displayed.
Page 638 of 3502
AV-110
INTEGRATED COLOR DISPLAY SYSTEM
Values for All Items in The TRIP Screen Do Not ChangeBKS0028A
Symptom: Values for items, “Elapsed Time”, “Driving Distance” and “Average Speed” in the TRIP screen do
not change.
1. CHECK DISPLAY CONTROL UNIT IGNITION SIGNAL
Select “Vehicle Signal” in Confirmation mode, and check the ignition signal inputting to display control unit.
Refer to AV- 9 0 , "
Vehicle Signal" .
OK or NG
OK >> Replace display control unit.
NG >> Check display control unit ignition signal circuit, and repair malfunctioning part.
Values for Items, “Driving Distance” and “Average Speed” Do Not ChangeBKS0028B
Symptom: Values for Items, "Driving Distance" and "Average Speed" do not change. (The Value for "Elapsed
Time" Changes.)
1. CHECK DISPLAY CONTROL UNIT VEHICLE SPEED SIGNAL
Select “Vehicle Signal” in Confirmation mode, and check the vehicle speed signal inputting to display control
unit. Refer to AV- 9 0 , "
Vehicle Signal" .
OK or NG
OK >> Replace display control unit.
NG >> Check display control unit vehicle speed signal circuit, and repair malfunctioning part.
Values for All Items in The FUEL ECONOMY Screen Do Not ChangeBKS0028C
Symptom: Values for items, “Average Fuel Economy” and “Distance to Empty” in the FUEL ECONOMY screen
do not change.
1. CHECK CONDITION
Check if values for all items in the TRIP screen change properly.
OK or NG
OK >> Select “CAN Diagnosis” in Confirmation mode, and check the status of CAN communication.
Refer to AV- 9 3 , "
CAN DIAGNOSIS" . Repair malfunctioning part after checked the status of CAN
communication. Refer to LAN-49, "
CAN System Specification Chart" .
NG >> Repair malfunctioning part. Refer to AV- 11 0 , "
Values for All Items in The TRIP Screen Do Not
Change" or AV- 11 0 , "Values for Items, “Driving Distance” and “Average Speed” Do Not Change" .
Page 649 of 3502
BCM (BODY CONTROL MODULE)
BCS-7
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BCM STATUS CONTROL
BCM changes its status depending on the operation status in order to save power consumption.
1. CAN communication status
With ignition switch ON, CAN communicates with other control units normally.
Control by BCM is being operated properly.
When ignition switch is OFF, switching to sleep mode is possible.
Even when ignition switch is OFF, if CAN communication with IPDM E/R, Intelligent Key unit or unified
meter and A/C amp. is active, CAN communication status is active.
2. Sleep transient status
This status shuts down CAN communication when ignition switch is turned OFF.
It transmits sleep request signal to IPDM E/R, Intelligent Key unit, driver seat control unit and unified
meter and A/C amp.
2 seconds after CAN communication of all control units stops, sleep transient status switches to CAN
communication inactive status.
3. CAN communication inactive status
With ignition switch OFF, CAN communication is not active.
With ignition switch OFF, control performed only by BCM is active.
When all controls that BCM performs stop, CAN communication inactive status switches to sleep sta-
tus.
4. Sleep status
BCM is activated with low power mode.
CAN communication is not active.
When CAN communication operation is detected, it switches to CAN communication status.
When a state of the following switches changes, it switches to CAN communication state.
–Ignition switch (ACC, ON)
–Key switch
–Ignition knob switch
–Hazard switch
–Door lock/unlock switch
–Front door switch (driver side, passenger side)
–Rear door switch (RH, LH)
–Trunk lid opener switch
–Trunk room lamp switch
–Combination switch (passing, lighting switch 1ST position, front fog lamp)
–Remote keyless entry receiver (lock/unlock signal)
When control performed only by BCM is required by switch, it shifts to CAN communication inactive
mode.
Status of combination switch reading function is changed.
Page 662 of 3502
![NISSAN TEANA 2003 Workshop Manual BL-4
INDEX FOR DTC
INDEX FOR DTCPFP:00024
DTC No. Index BIS001TQ
NOTE:
When CAN COMM CIRCUIT [U1000] or CONTROL UNIT (CAN) [U1010] displayed, give priority to performing
trouble diagnosis.
INTELLIGE](/img/5/57392/w960_57392-661.png "NISSAN TEANA 2003 Workshop Manual BL-4
INDEX FOR DTC
INDEX FOR DTCPFP:00024
DTC No. Index BIS001TQ
NOTE:
When CAN COMM CIRCUIT [U1000] or CONTROL UNIT (CAN) [U1010] displayed, give priority to performing
trouble diagnosis.
INTELLIGE")
BL-4
INDEX FOR DTC
INDEX FOR DTCPFP:00024
DTC No. Index BIS001TQ
NOTE:
When CAN COMM CIRCUIT [U1000] or CONTROL UNIT (CAN) [U1010] displayed, give priority to performing
trouble diagnosis.
INTELLIGENT KEY / NATS I-KEY
*: It is possible to display it only with the program card only for the engine immobilizer system.
NATS V5.0
The program card only for the engine immobilizer system is necessary for the following display item.
DTCSelf-diagnosis item
(CONSULT-II indication)DTC detection condition
NO DTC NO DTC —
U1000 CAN COMM CIRCUITWhen Intelligent Key unit is not transmitting or receiving CAN communication signal for
2 seconds or more.
U1010 CONTROL UNIT (CAN) When detecting error during the initial diagnosis of CAN controller of Intelligent Key unit.
B2013* STRG COMM CIRCUIT Communication malfunction with steering lock unit is detected.
B2552* INTELLGENT KEY Internal malfunction is detected in Intelligent Key unit.
B2590* DISCORD BCM-I-KEY The ID verification results between Intelligent Key unit and BCM are NG.
DTCSelf-diagnosis item
(CONSULT-II indication)DTC detection condition
NO DTC NO DTC —
—DON’T ERASE BEFORE
CHECKING END DIAGThere is the engine trouble diagnosis information in ECM. (ECM trouble diagnosis is nec-
essary separately)
P1610 LOCK MODEThe immobilizer switches to the mode that prevents the engine from being started. If the
ID verification between BCM and ECM is NG, the ID verification malfunction between
remote control starter and BCM may be detected 5 time or more.
P1611 ID DISCORD, IMM-ECM The ID verification results between BCM and ECM are NG. The registration is necessary.
P1612 CHAIN OF ECM-IMMU Communication impossible between ECM and NATS IMMU.
P1614 CHAIN OF IMMU-KEY NATS IMMU cannot receive the key ID signal.
P1615 DIFFERENCE OF KEYNATS IMMU can receive the key ID signal but the result of ID verification between key ID
and NATS IMMU is NG.
Page 663 of 3502
PRECAUTIONS
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
BIS000VH
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
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 DisconnectBIS000VI
NOTE:
This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT
SYSTEM).
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 NATS, an electrically controlled steering lock mech-
anism 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.
Precautions for WorkBIS000VJ
After removing and installing the opening/closing parts, be sure to carry out fitting adjustments to check
their operation.
Check the lubrication level, damage, and wear of each part. If necessary, grease or replace it.