Infiniti QX56 (Z62). Manual — part 1154
SEC-6
< PRECAUTION >
[WITH INTELLIGENT KEY SYSTEM]
PRECAUTIONS
5.
When the repair work is completed, re-connect both 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 ignition switch is turned to LOCK position.)
6.
Perform self-diagnosis check of all control units using CONSULT-III.
Precaution for Procedure without Cowl Top Cover
INFOID:0000000006226150
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
PIIB3706J
COMPONENT PARTS
SEC-7
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
C
D
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A
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SEC
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000006226151
1.
Inside key antenna (console)
Refer to
SYSTEM :
Component Parts Location"
.
2.
A/T assembly
Refer to
SYSTEM : Component Parts Loca-
tion"
.
3.
Push-button ignition switch
4.
NATS antenna amp.
5.
Inside key antenna (instrument cen-
ter)
Refer to
SYSTEM :
Component Parts Location"
.
6.
IPDM E/R
Refer to
7.
).
8.
Horn
9.
ABS actuator and electric unit (con-
trol unit)
Refer to
10. Stop lamp switch
.
11.
BCM
Refer to
SYSTEM : Component Parts Loca-
tion"
.
12. Combination meter
Refer to
.
JMKIA5243ZZ
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 shift 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 selector 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)
BCM
INFOID:0000000006226154
BCM controls INTELLIGENT KEY SYSTEM (ENGINE 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 switch is pressed. If the ID verification result is
OK, push-button ignition switch operation is available.
13. Front door switch (driver side)
SYSTEM :
Component Parts Location"
.
14. Remote keyless entry receiver
Refer to
SYSTEM :
Component Parts Location"
15. Inside key antenna (luggage room)
SYSTEM :
Component Parts Location"
A.
Behind push-button ignition switch
Component Reference
A/T shift selector (detention switch)
BCM
ECM
IPDM E/R
NATS antenna amp.
TCM
Combination meter
Door switch
Hood switch
Inside key antenna
Intelligent Key
Push-button ignition switch
Remote keyless entry receiver
Security indicator lamp
Starter control relay
Starter relay
Steering lock relay
Steering lock unit
Stop lamp switch
Transmission range switch
Vehicle information display
COMPONENT PARTS
SEC-9
< SYSTEM DESCRIPTION >
[WITH INTELLIGENT KEY SYSTEM]
C
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SEC
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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.
ECM
INFOID: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/R
INFOID:0000000006226156
IPDM E/R has steering lock relay, starter relay and starter control relay inside. Steering lock relay is used for
the steering lock/unlock function. Starter relay and starter 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 ignition 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.
TCM
INFOID: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 selector 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 Meter
INFOID:0000000006226159
Combination meter transmits the vehicle speed signal to BCM via CAN communication.
BCM also receives the vehicle speed signal from ABS actuator and electric unit (control unit) via CAN commu-
nication. BCM compares both signals to detect the vehicle speed.
Door Switch
INFOID:0000000006226160
Door switch detects door open/close condition and then transmits ON/OFF signal to BCM.
Hood Switch
INFOID: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 Antenna
INFOID: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 the instrument center, console and luggage room.
Intelligent Key
INFOID: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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