steering INFINITI QX56 2011 Factory Service Manual

SEC-2
WIRING DIAGRAM .....................................31
SECURITY CONTROL SYSTEM .................... ...31
Wiring Diagram .................................................... ...31
BASIC INSPECTION ...................................48
DIAGNOSIS AND REPAIR WORK FLOW ..... ...48
Work Flow ............................................................ ...48
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT ................................................
51
ECM ........................................................................ ...51
ECM : Description ...................................................51
ECM : Work Procedure ...........................................51
BCM ........................................................................ ...51
BCM : Description ...................................................51
BCM : Work Procedure ...........................................51
DTC/CIRCUIT DIAGNOSIS ...................... ...53
P1610 LOCK MODE ....................................... ...53
Description ........................................................... ...53
DTC Logic ...............................................................53
Diagnosis Procedure ..............................................53
P1611 ID DISCORD, IMMU-ECM ......................54
DTC Logic ............................................................ ...54
Diagnosis Procedure ..............................................54
P1612 CHAIN OF ECM-IMMU ...........................55
DTC Logic ............................................................ ...55
Diagnosis Procedure ..............................................55
P1614 CHAIN OF IMMU-KEY ...........................56
DTC Logic ............................................................ ...56
Diagnosis Procedure ..............................................56
B2192 ID DISCORD, IMMU-ECM ......................60
DTC Logic ............................................................ ...60
Diagnosis Procedure ..............................................60
B2193 CHAIN OF ECM-IMMU ...........................61
DTC Logic ............................................................ ...61
Diagnosis Procedure ..............................................61
B2195 ANTI-SCANNING ...................................62
DTC Logic ............................................................ ...62
Diagnosis Procedure ..............................................62
B2196 DONGLE UNIT .......................................63
Description ........................................................... ...63
DTC Logic ...............................................................63
Diagnosis Procedure ..............................................63
B2198 NATS ANTENNA AMP. .........................65
DTC Logic ............................................................ ...65
Diagnosis Procedure ..............................................65
B2013 STEERING LOCK UNIT .........................69
DTC Logic ............................................................ ...69
Diagnosis Procedure ............................................ ...69
B2014 CHAIN OF STRG-IMMU ........................70
DTC Logic ............................................................ ...70
Diagnosis Procedure ...............................................70
B2555 STOP LAMP ...........................................73
DTC Logic ............................................................ ...73
Diagnosis Procedure ...............................................73
Component Inspection ............................................74
B2556 PUSH-BUTTON IGNITION SWITCH .....76
DTC Logic ............................................................ ...76
Diagnosis Procedure ...............................................76
Component Inspection ............................................77
B2557 VEHICLE SPEED ...................................78
DTC Logic ............................................................ ...78
Diagnosis Procedure ...............................................78
B2601 SHIFT POSITION ...................................79
DTC Logic ............................................................ ...79
Diagnosis Procedure ...............................................79
Component Inspection ............................................81
B2602 SHIFT POSITION ...................................82
DTC Logic ............................................................ ...82
Diagnosis Procedure ...............................................82
Component Inspection ............................................83
B2603 SHIFT POSITION ...................................85
DTC Logic ............................................................ ...85
Diagnosis Procedure ...............................................85
Component Inspection ............................................87
B2604 SHIFT POSITION ...................................89
DTC Logic ............................................................ ...89
Diagnosis Procedure ...............................................89
B2605 SHIFT POSITION ...................................91
DTC Logic ............................................................ ...91
Diagnosis Procedure ...............................................91
B2608 STARTER RELAY .................................93
DTC Logic ............................................................ ...93
Diagnosis Procedure ...............................................93
B2609 STEERING STATUS ..............................95
DTC Logic ............................................................ ...95
Diagnosis Procedure ...............................................95
B260B STEERING LOCK UNIT ........................98
DTC Logic ............................................................ ...98
Diagnosis Procedure ...............................................98
B260C STEERING LOCK UNIT ........................99
DTC Logic ............................................................ ...99
Diagnosis Procedure ...............................................99
B260D STEERING LOCK UNIT .......................100
DTC Logic ............................................................ .100
Diagnosis Procedure .............................................100
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SEC-3
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B260F ENGINE STATUS ............................... ..101
Description .......................................................... ..101
DTC Logic .............................................................101
Diagnosis Procedure .............................................101
B2612 STEERING STATUS .............................102
DTC Logic ........................................................... ..102
Diagnosis Procedure .............................................102
B2619 BCM ......................................................105
DTC Logic ........................................................... ..105
Diagnosis Procedure .............................................105
B26E9 STEERING STATUS ............................106
DTC Logic ........................................................... ..106
Diagnosis Procedure .............................................106
B26EF STEERING LOCK RELAY ...................107
DTC Logic ........................................................... ..107
Diagnosis Procedure .............................................107
B26F0 STEERING LOCK RELAY ...................109
DTC Logic ........................................................... ..109
Diagnosis Procedure .............................................109
B26F3 STARTER CONTROL RELAY .............111
DTC Logic ........................................................... ..111
Diagnosis Procedure .............................................111
B26F4 STARTER CONTROL RELAY .............112
DTC Logic ........................................................... ..112
Diagnosis Procedure .............................................112
B26F5 STEERING LOCK STATUS SWITCH ..113
DTC Logic .............................................................113
Diagnosis Procedure .............................................113
B26F7 BCM ......................................................116
DTC Logic ........................................................... ..116
Diagnosis Procedure .............................................116
B26F8 BCM ......................................................117
DTC Logic ........................................................... ..117
Diagnosis Procedure .............................................117
B26F9 CRANKING REQUEST CIRCUIT .........118
DTC Logic ........................................................... ..118
Diagnosis Procedure .............................................118
B26FA CRANKING REQUEST CIRCUIT ........120
DTC Logic ........................................................... ..120
Diagnosis Procedure .............................................120
B26FC KEY REGISTRATION ..........................122
DTC Logic ........................................................... ..122
Diagnosis Procedure .............................................122
B209F CRANKING REQUEST CIRCUIT .........123
DTC Logic ........................................................... ..123
Diagnosis Procedure .............................................123
B20A0 CRANKING REQUEST CIRCUIT .......125
DTC Logic ............................................................ ..125
Diagnosis Procedure .............................................125
B2108 STEERING LOCK RELAY ..................127
DTC Logic ..............................................................127
Diagnosis Procedure .............................................127
B2109 STEERING LOCK RELAY ..................128
DTC Logic ..............................................................128
Diagnosis Procedure .............................................128
B210A STEERING LOCK UNIT ......................129
DTC Logic ..............................................................129
Diagnosis Procedure .............................................129
B210B STARTER CONTROL RELAY ............131
DTC Logic ..............................................................131
Diagnosis Procedure .............................................131
B210C STARTER CONTROL RELAY ............132
DTC Logic ..............................................................132
Diagnosis Procedure .............................................132
B210D STARTER RELAY ..............................133
DTC Logic ..............................................................133
Diagnosis Procedure .............................................133
B210E STARTER RELAY ...............................134
DTC Logic ..............................................................134
Diagnosis Procedure .............................................134
B210F SHIFT POSITION/CLUTCH INTER-
LOCK SWITCH ...............................................
136
DTC Logic ..............................................................136
Diagnosis Procedure .............................................136
B2110 SHIFT POSITION/CLUTCH INTER-
LOCK SWITCH ...............................................
138
DTC Logic ..............................................................138
Diagnosis Procedure .............................................138
HEADLAMP FUNCTION .................................140
Component Function Check ..................................140
Diagnosis Procedure .............................................140
HOOD SWITCH ...............................................141
Component Function Check ................................141
Diagnosis Procedure ............................................141
Component Inspection ...........................................142
HORN FUNCTION ...........................................143
Component Function Check .............................. ..143
Diagnosis Procedure ............................................143
Component Inspection ...........................................145
SECURITY INDICATOR LAMP ......................146
Component Function Check ................................146
Diagnosis Procedure .............................................146
SYMPTOM DIAGNOSIS ............................148
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SEC-4
ENGINE DOES NOT START WHEN INTELLI-
GENT KEY IS INSIDE OF VEHICLE ...............
148
Description ........................................................... ..148
Diagnosis Procedure .............................................148
STEERING DOES NOT LOCK ........................149
Description ........................................................... ..149
Diagnosis Procedure .............................................149
SECURITY INDICATOR LAMP DOES NOT
TURN ON OR BLINK .......................................
150
Description ........................................................... ..150
Diagnosis Procedure .............................................150
VEHICLE SECURITY SYSTEM CANNOT BE
SET ..................................................................
151
INTELLIGENT KEY ................................................ ..151
INTELLIGENT KEY : Description ..........................151
INTELLIGENT KEY : Diagnosis Procedure ......... ..151
DOOR REQUEST SWITCH ................................... ..151
DOOR REQUEST SWITCH : Description .............151
DOOR REQUEST SWITCH : Diagnosis Proce-
dure ...................................................................... .
151
DOOR KEY CYLINDER ......................................... .152
DOOR KEY CYLINDER : Description ...................152
DOOR KEY CYLINDER : Dia gnosis Procedure .. .152
VEHICLE SECURITY ALARM DOES NOT
ACTIVATE ...................................................... ..
153
Description ........................................................... .153
Diagnosis Procedure .............................................153
PANIC ALARM FUNCTION DOES NOT OP-
ERATE ..............................................................
154
Description ........................................................... .154
Diagnosis Procedure .............................................154
REMOVAL AND INSTALLATION .............155
NATS ANTENNA AMP. .................................. ..155
Removal and Installation ...................................... .155
PUSH-BUTTON IGNITION SWITCH ................156
Exploded View ..................................................... .156
Removal and Installation .......................................156
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PRECAUTIONSSEC-5
< PRECAUTION > [WITH INTELLIGENT KEY SYSTEM]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006226148
The Supplemental Restraint System such as “A IR 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. 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:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g 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 “SRS AIR BAG”.
 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, DO NOT 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.
Precaution Necessary for Steering Wh eel Rotation after Battery Disconnect
INFOID:0000000006226149
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the batte ry disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wil l remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
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SEC-6
< PRECAUTION >[WITH INTELLIGENT KEY SYSTEM]
PRECAUTIONS
5. When the repair work is completed, re-connect bot
h battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Precaution for Procedure without Cowl Top CoverINFOID:0000000006226150
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
PIIB3706J
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SEC-8
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
COMPONENT PARTS
Component Description
INFOID:0000000006226152
A/T Shift Selector (Detention Switch)INFOID:0000000006226153
Detention switch detects that A/T sh ift selector is in the P position, and then transmits the signal to BCM and
IPDM E/R.
BCM confirms the A/T shift selector position with the following 5 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P position signal from IPDM E/R (CAN)
 P/N position signal from IPDM E/R (CAN)
 P/N position signal from TCM (CAN)
IPDM E/R confirms the A/T shift select or position with the following 3 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P/N position signal from BCM (CAN)
BCMINFOID:0000000006226154
BCM controls INTELLIGENT KEY SYSTEM (ENGIN E START FUNCTION), INFINITI VEHICLE IMMOBI-
LIZER SYSTEM-NATS [IVIS (NATS)], and VEHICLE SECURITY SYSTEM.
BCM performs the ID verification between BCM and Intelligent Key when the Intelligent Key is carried into the
detection area of inside key antenna, and push-button ignition s witch is pressed. If the ID verification result is
OK, push-button ignition switch operation is available.
13. Front door swit ch (driver side)
Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation". 14. Remote keyless entry receiver
Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation". 15. Inside key antenna (luggage room)
Refer to DLK-11, "
DOOR LOCK
SYSTEM :
ComponentPartsLocation".
A. Behind push-button ignition switch
Component Reference
A/T shift selector (detention switch) SEC-8
BCMSEC-8
ECMSEC-9
IPDM E/RSEC-9
NATS antenna amp.SEC-9
TCMSEC-9
Combination meterSEC-9
Door switchSEC-9
Hood switchSEC-9
Inside key antennaSEC-9
Intelligent KeySEC-9
Push-button ignition switchSEC-10
Remote keyless entry receiverSEC-10
Security indicator lampSEC-10
Starter control relaySEC-10
Starter relaySEC-10
Steering lock relaySEC-10
Steering lock unitSEC-10
Stop lamp switchSEC-10
Transmission range switchSEC-10
Vehicle information display SEC-11
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COMPONENT PARTSSEC-9
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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Then, when the power supply position is turned ON, BCM performs ID verification between BCM and ECM. If
the ID verification result is OK, ECM can start engine.
ECMINFOID:0000000006226155
ECM controls the engine.
When power supply position is turned ON, BCM starts communication with ECM and performs the ID verifica-
tion between BCM and ECM.
If the verification result is OK, the engine can start. If the verification result is NG, the engine can not start.
IPDM E/RINFOID:0000000006226156
IPDM E/R has steering lock relay, starter relay and starte r control relay inside. Steering lock relay is used for
the steering lock/unlock function. Starter relay and star ter control relay are used for the engine starting func-
tion. IPDM E/R controls these relays while communicating with BCM.
NATS Antenna Amp.INFOID:0000000006226157
The ID verification is performed between BCM and transponder in Intelligent Key via NATS antenna amp.
when Intelligent Key backside is contacted to push-button i gnition switch in case that Intelligent Key battery is
discharged. If the ID verification result is OK, the release of steering lock and the operation of starting engine
is available.
TCMINFOID:0000000006226158
TCM transmits the shift position signal (P/N position) to BCM and IPDM E/R. And further, TCM transmits the
shift position signal (P/N position) to BCM via CAN communication.
BCM confirms the A/T shift selector position with the following 5 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P position signal from IPDM E/R (CAN)
 P/N position signal from IPDM E/R (CAN)
 P/N position signal from TCM (CAN)
IPDM E/R confirms the A/T shift sele ctor position with the following 3 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P/N position signal from BCM (CAN)
Combination MeterINFOID:0000000006226159
Combination meter transmits the vehicle speed signal to BCM via CAN communication.
BCM also receives the vehicle speed signal from ABS ac tuator and electric unit (control unit) via CAN commu-
nication. BCM compares both signals to detect the vehicle speed.
Door SwitchINFOID:0000000006226160
Door switch detects door open/close condition and then transmits ON/OFF signal to BCM.
Hood SwitchINFOID:0000000006226161
Hood switch detects that hood is open, and then transmits the signal to IPDM E/R. IPDM E/R transmits hood
switch signal to BCM via CAN communication.
Inside Key AntennaINFOID:0000000006226162
Inside key antenna detects whether Intelligent Key is inside the vehicle, and transmits the signal to BCM.
Three inside key antennas are installed in t he instrument center, console and luggage room.
Intelligent KeyINFOID:0000000006226163
Each Intelligent key has an individual electronic ID , and transmits the ID signal by request from BCM.
Carrying the Intelligent Key whose ID is registered in BCM, the driver can performs door lock/unlock operation
and push-button ignition switch operation.
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SEC-10
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
COMPONENT PARTS
Push-button Ignition Switch
INFOID:0000000006226165
Push-button ignition switch detects that push-button is pressed, and then transmits the signal to BCM. BCM
changes the power supply position with the operation of push-button ignition switch. BCM maintains the power
supply position status while push-button is not operated.
Remote Keyless Entry ReceiverINFOID:0000000006226166
Remote keyless entry receiver receives each button oper ation signal and electronic key ID signal from Intelli-
gent Key, and then transmits the signal to BCM.
Security Indicator LampINFOID:0000000006226167
Security indicator lamp is located on combination meter.
Security indicator lamp blinks when power supply position is any position other than ON to warn that INFINITI
VEHICLE IMMOBILIZER SYSTEM-N ATS [IVIS (NATS)] is on board.
Starter Control RelayINFOID:0000000006226170
Engine starting system functions by controlling both starter relay and starter control relay.
Both relays are integrated in IPDM E/R. Starter relay is controlled by BCM, and starter control relay is con-
trolled by IPDM E/R on request from BCM.
IPDM E/R transmits starter relay and starter control relay status signal to BCM via CAN communication.
Starter RelayINFOID:0000000006226171
Engine starting system functions by controlling both starter relay and starter control relay.
Both relays are integrated in IPDM E/R. Starter relay is controlled by BCM, and starter control relay is con-
trolled by IPDM E/R on request from BCM.
IPDM E/R transmits starter relay and starter control relay status signal to BCM via CAN communication.
Steering Lock RelayINFOID:0000000006226172
Steering lock relay is integrated in IPDM E/R, and supplies power source to steering lock unit.
When IPDM E/R receives the steering lock relay ON request signal from BCM, IPDM E/R turns ON steering
lock relay and then transmits the steering lock relay condition signal to BCM.
Steering Lock UnitINFOID:0000000006226173
Steering lock unit performs steering lock/unlock operation on request from BCM, and power source is supplied
from steering lock relay integrated in IPDM E/R.
When push-button ignition switch is pressed while the In telligent Key is inside the vehicle, BCM performs the
ID verification with steering lock unit. Steering lock unit releases the steering lock based on the result of the ID
verification.
Steering lock unit has 2 switches (steering lock status switch and steering unlock status switch) inside. BCM
judges the steering lock/unlock condition by comparing these switch signals and steering lock unit status sig-
nal transmitted from IPDM E/R via CAN communication.
Stop Lamp SwitchINFOID:0000000006226174
Stop lamp switch detects that brake pedal is depressed, and then transmits the signal to BCM.
Transmission Range SwitchINFOID:0000000006226175
Transmission range switch is integrated in A/T asse mbly, and detects the A/T shift selector position.
TCM receives the transmission range switch signal and then transmits the P/N position signal to BCM and
IPDM E/R.
BCM confirms the A/T shift selector position with the following 5 signals.
 P position signal from A/T shift selector (detention switch)
 P/N position signal from TCM
 P position signal from IPDM E/R (CAN)
 P/N position signal from IPDM E/R (CAN)
 P/N position signal from TCM (CAN)
IPDM E/R confirms the A/T shift select or position with the following 3 signals.
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SEC-12
< SYSTEM DESCRIPTION >[WITH INTELLIGENT KEY SYSTEM]
SYSTEM
SYSTEM
INTELLIGENT KEY SYSTEM
/ENGINE START FUNCTION
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION : System Diagram
INFOID:0000000006226178
INTELLIGENT KEY SYSTEM/ENGINE STAR T FUNCTION : System Description
INFOID:0000000006226179
SYSTEM DESCRIPTION
 The engine start function of Intelligent Key system makes it possible to start and stop the engine without
using the key, based on the electronic ID verification. The electronic ID verification is performed between
BCM and Intelligent Key when the push-button ignition swit ch is pressed while the Intelligent Key is within
the detection area of inside key antenna.
NOTE:
The driver should carry the Intelligent Key at all times.
 Intelligent Key has 2 IDs [Intelligent Key ID and IVIS (NATS) ID]. It can perform the door lock/unlock opera-
tion and the push-button ignition switch operation when the registered Intelligent Key is carried.
 When Intelligent Key battery is discharged, engine c an be started by operating push-button ignition switch
after contacting Intelligent Key backside to push-button igni tion switch. At that time, the IVIS (NATS) ID veri-
fication is performed.
 If the ID is successfully verified, when push-button igni tion switch is pressed, steering lock is released and
the engine can be started.
JMKIA5239GB
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SYSTEMSEC-13
< SYSTEM DESCRIPTION > [WITH INTELLIGENT KEY SYSTEM]
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 Up to 4 Intelligent Keys can be registered (Includi ng the standard Intelligent Key) upon request from the cus-
tomer.
NOTE:
Refer to DLK-18, "
INTELLIGENT KEY SYSTEM : System Description" for any functions other than engine
start function of Intelligent Key system.
PRECAUTIONS FOR INTELLIGENT KEY SYSTEM
The transponder [the chip for IVIS (NATS) ID verification] is integrated into the Intelligent Key. (For the
conventional models, it is integrated into the mech anical key.) Therefore, ID verification cannot be per-
formed by mechanical key only.
In that case, the IVIS (NATS) ID verification can be performed when Intelligent Key backside is con-
tacted to push-button ignition switch. If verification result is OK, engine can be started.
OPERATION WHEN INTELLIGENT KEY IS CARRIED
1. When the push-button ignition switch is pressed, the BCM activates the inside key antenna and transmits
the request signal to the Intelligent Key.
2. The Intelligent Key receives the request signal and transmits the Intelligent Key ID signal to the BCM.
3. BCM receives the Intelligent Key ID signal via remote keyless entry receiver and verifies it with the regis-
tered ID.
4. BCM transmits the unlock signal to steering lock unit and IPDM E/R if the verification results are OK.
5. IPDM E/R turns the steering lock relay ON and supplies power supply to the steering lock unit.
6. The steering lock releases.
7. BCM transmits the power supply stop signal to IPDM E/R when detecting that the steering lock is in the
unlock condition.
8. IPDM E/R turns the steering lock relay OFF and stops power supply to the steering lock unit.
9. BCM turns ACC relay ON and transmits the ignition power supply ON signal to IPDM E/R.
10. IPDM E/R turns the ignition relay ON and starts the ignition power supply.
11. BCM detects that the selector lever position and brake pedal operating condition.
12. BCM transmits the starter request signal to IPDM E/R and turns the starter relay in IPDM E/R ON if BCM
judges that the engine start condition* is satisfied.
13. IPDM E/R turns the starter control relay ON when receiving the starter request signal.
14. Power supply is supplied through the starter relay and the starter control relay to operate the starter motor. CAUTION:
If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp in the combina-
tion meter illuminates. At that time, the engine cannot be started.
15. When BCM receives feedback signal from ECM indicati ng that the engine is started, the BCM transmits a
stop signal to IPDM E/R and stops cranking by turning OFF the starter motor relay. (If engine start is
unsuccessful, cranking stops automatically within 5 seconds.)
CAUTION:
When the Intelligent Key is carried outside of th e vehicle (inside key antenna detection area) while
the power supply is in the ACC or ON position, even if the engine start condition* is satisfied, the
engine cannot be started.
*: For the engine start condition, refer to “POWER SUPPLY POSITION CHANGE TABLE BY PUSH-BUTTON
IGNITION SWITCH OPERATION”.
OPERATION RANGE
Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine may not start
when Intelligent Key is on instrument panel or in glove box.
ENGINE START OPERATION WHEN INTELLIGENT KEY IS CONTACTED TO PUSH-BUTTON IG-
NITION SWITCH
When Intelligent Key battery is discharged, the IVIS (NATS) ID verification between transponder in Intelligent
Key and BCM is performed when Intelligent Key backside is contacted to push-button ignition switch. If the
verification result is OK, engine can be started.
STEERING LOCK OPERATION
Steering is locked by steering lock unit when any of the following conditions are met.
Revision: 2010 May2011 QX56