2006 Nissan Maxima - Body Control System (Section BCS) (20 pages)
Download Body Control System (Section BCS)
Manual Description
(SRS) AIR BAG” and SEAT BELT PRE-TENSIONER” 2, sYSTEMS CONTROLLED BY BCM DIRECTLY 7, sYSTEMS CONTROLLED BY BCM AND IPDM, mAJOR COMPONENTS AND CONTROL SYSTEM 7.
CAN Communication Inspection Using CONSULTII (Self-Diagnosis) 13, precautions for Supplemental Restraint System (SRS) AIR BAG” SEAT, 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 certain.
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 belted unbelted, information necessary to service the system safely is included in the SRS and SB section Service Manual, to avoid rendering the SRS inoperative, which could increase the risk of personal injury death.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system, do not use electrical test equipment on any circuit related to the SRS unless instructed, bCM (body control module) controls the operation of various electrical units installed vehicle, bCM has a combination switch reading function for reading the operation of combination switches (light, wiper.
Washer, turn signal) in addition to the function for controlling the operation various electrical components, also, it functions as an interface that receives signals from the A/C control unit (with manual A/C), A/C auto, amplifier (with auto A/C), and sends signals to ECM using CAN communication, q BCM reads combination switch (light, wiper) status, and controls various electrical components according results.
Q BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1 5) and five input terminals (INPUT 1 - 5), q BCM activates transistors of output terminals (OUTPUT 1-5) periodically and allows current flow, q At this time, transistors of output terminals (OUTPUT 1 - 5) are activated to allow current flow, voltage of input terminals (INPUT 1-5) corresponding to that switch changes, interface BCM detects.
Voltage change and BCM determines that switch ON, bCM - Operation table combination switch, q BCM reads operation status of combination switch by the combination shown following table, headlamp has dual system switch.
Example operation: (When lighting switch 1st position turned ON), q When lighting switch 1st position is turned ON, contact in combination switch turns ON, oUTPUT transistor is activated, BCM detects that voltage changes INPUT 5, q When OUTPUT 4 transistor is ON, BCM detects that voltage changes in INPUT 5, judges lighting.
Q When OUTPUT 4 transistor is activated again, BCM detects that voltage changes in INPUT 5 and recognizes that lighting switch 1st position continuously ON, each OUTPUT terminal transistor is activated at 10 ms intervals, electrical loads are activated with a time delay, q Combination switch reading function has operation modes follows.
When BCM is in sleep mode, transistors of OUTPUT 1 and 5 stop the output, and BCM enters low-current-consumption mode, cAN communication allows a high rate of information through the two communication lines (CAN-L, CAN-H), connecting the various control units in the system, bCM changes its status depending on the operation status in order save power consumption.
Q With ignition switch ON, CAN communicates with other control units normally, q When ignition switch is OFF, switching to sleep mode possible, q Even when ignition switch is OFF, if CAN communication with IPDM E/R combination meter, active, CAN communication status active.
Q This status shuts down CAN communication when ignition switch turned OFF, q It transmits sleep request signal to IPDM E/R combination meter, q Two seconds after CAN communication of all control units stops, CAN communication switches inactive status, q With ignition switch OFF, CAN communication not active.
Q With ignition switch OFF, control performed only by BCM active, q Three seconds after CAN communication of all control units stops, CAN communication switches, bCM is activated with low current consumption mode, when CAN communication operation is detected, it switches CAN communication status.
When a state of the following switches changes, it switches CAN communication state, key switch key lock solenoid, combination switch (passing, lighting switch 1st position, front fog lamp).
Manual Description
(SRS) AIR BAG” and SEAT BELT PRE-TENSIONER” 2, sYSTEMS CONTROLLED BY BCM DIRECTLY 7, sYSTEMS CONTROLLED BY BCM AND IPDM, mAJOR COMPONENTS AND CONTROL SYSTEM 7.
CAN Communication Inspection Using CONSULTII (Self-Diagnosis) 13, precautions for Supplemental Restraint System (SRS) AIR BAG” SEAT, 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 certain.
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 belted unbelted, information necessary to service the system safely is included in the SRS and SB section Service Manual, to avoid rendering the SRS inoperative, which could increase the risk of personal injury death.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system, do not use electrical test equipment on any circuit related to the SRS unless instructed, bCM (body control module) controls the operation of various electrical units installed vehicle, bCM has a combination switch reading function for reading the operation of combination switches (light, wiper.
Washer, turn signal) in addition to the function for controlling the operation various electrical components, also, it functions as an interface that receives signals from the A/C control unit (with manual A/C), A/C auto, amplifier (with auto A/C), and sends signals to ECM using CAN communication, q BCM reads combination switch (light, wiper) status, and controls various electrical components according results.
Q BCM reads information of a maximum of 20 switches by combining five output terminals (OUTPUT 1 5) and five input terminals (INPUT 1 - 5), q BCM activates transistors of output terminals (OUTPUT 1-5) periodically and allows current flow, q At this time, transistors of output terminals (OUTPUT 1 - 5) are activated to allow current flow, voltage of input terminals (INPUT 1-5) corresponding to that switch changes, interface BCM detects.
Voltage change and BCM determines that switch ON, bCM - Operation table combination switch, q BCM reads operation status of combination switch by the combination shown following table, headlamp has dual system switch.
Example operation: (When lighting switch 1st position turned ON), q When lighting switch 1st position is turned ON, contact in combination switch turns ON, oUTPUT transistor is activated, BCM detects that voltage changes INPUT 5, q When OUTPUT 4 transistor is ON, BCM detects that voltage changes in INPUT 5, judges lighting.
Q When OUTPUT 4 transistor is activated again, BCM detects that voltage changes in INPUT 5 and recognizes that lighting switch 1st position continuously ON, each OUTPUT terminal transistor is activated at 10 ms intervals, electrical loads are activated with a time delay, q Combination switch reading function has operation modes follows.
When BCM is in sleep mode, transistors of OUTPUT 1 and 5 stop the output, and BCM enters low-current-consumption mode, cAN communication allows a high rate of information through the two communication lines (CAN-L, CAN-H), connecting the various control units in the system, bCM changes its status depending on the operation status in order save power consumption.
Q With ignition switch ON, CAN communicates with other control units normally, q When ignition switch is OFF, switching to sleep mode possible, q Even when ignition switch is OFF, if CAN communication with IPDM E/R combination meter, active, CAN communication status active.
Q This status shuts down CAN communication when ignition switch turned OFF, q It transmits sleep request signal to IPDM E/R combination meter, q Two seconds after CAN communication of all control units stops, CAN communication switches inactive status, q With ignition switch OFF, CAN communication not active.
Q With ignition switch OFF, control performed only by BCM active, q Three seconds after CAN communication of all control units stops, CAN communication switches, bCM is activated with low current consumption mode, when CAN communication operation is detected, it switches CAN communication status.
When a state of the following switches changes, it switches CAN communication state, key switch key lock solenoid, combination switch (passing, lighting switch 1st position, front fog lamp).
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