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System Description
 
 
SYSTEM DIAGRAM
noteAUTO light switch is not applicable. (For Canada models)
 
 
OUTLINE
  • BCM reads the status of the combination switch and recognizes the status of each switch.
  • BCM has a combination of 6 input terminals (INPUT 1 - 6) and 6 output terminals (OUTPUT 1 - 6), reads a maximum of 22 switch states and 6 check diode states.
 
 
COMBINATION SWITCH MATRIX
noteAUTO light switch is not applicable. (For Canada models)
Combination switch INPUT-OUTPUT system list
SystemINPUT 1INPUT 2INPUT 3INPUT 4INPUT 5INPUT 6
OUTPUT 1Check diode 1INT volume 1Front washer switchFront wiper LOINT volume 2Front wiper OFF
OUTPUT 2High beam switchCheck diode 2Rear washer switchFront wiper HIINT volume 3Front wiper MIST
OUTPUT 3Passing switchLow beam switchCheck diode 3Front wiper INTRear wiper INT
OUTPUT 4AUTO light switchTurn signal LHCheck diode 4Rear wiper ON
OUTPUT 5Front fog switchTail light switchTurn signal RHLight OFF switchCheck diode 5
OUTPUT 6Check diode 6
noteAUTO light switch is not applicable. (For Canada models)
 
 
COMBINATION SWITCH READING FUNCTION
 
 
Description
  • BCM reads the status of the combination switch at 10 ms intervals normally.
  • BCM operates as follows and judges the status of the combination switch.
    • It operates the transistor on INPUT side in the following order: OUTPUT 6–> 5 –> 4 –> 3 –> 2 –> 1, and outputs voltage waveform.
    • The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT side if any (1 or more) switches are ON.
    • It reads this change of the voltage as the status signal of the combination switch.
 
 
Operation Example
In the following operation example, the combination of the status signals of the combination switch is replaced as follows: INPUT 1 - 6 to “ - ” and OUTPUT 1 - 6 to “ - ”.
Example 1: When a switch (Turn signal RH) is turned ON
  • The circuit between INPUT 3 () and OUTPUT 5 () is formed when the Turn signal RH is turned ON.
    noteAUTO light switch is not applicable. (For Canada models)
  • BCM detects the combination switch status signal “” when the signal of INPUT 3 is input to OUTPUT 5.
  • BCM judges that the Turn signal RH is ON when the signal “” is detected.
Example 2: When some switches (Front fog switch, Turn signal RH) are turned ON
  • The circuits between INPUT 1 () and OUTPUT 5 () and between INPUT 3 () and OUTPUT 5 () are formed when the Front fog switch and Turn signal RH are turned ON.
    noteAUTO light switch is not applicable. (For Canada models)
  • BCM detects the combination switch status signal “” when the signals of INPUT 1 and INPUT 3 are input to OUTPUT 5.
  • BCM judges that the Front fog switch and Turn signal RH are ON when the signal “” is detected.
noteBCM judges lighting switch is in AUTO position when light OFF switch is ON. (For Canada models)
 
 
WIPER INTERMITTENT DIAL POSITION (WITH WIPER INTERMITTENT DIAL POSITION)
BCM judges the wiper intermittent dial 1 - 5 by the status of INT volume 1, 2 and 3 switches.
Wiper intermittent
dial position
Switch status
INT volume 1INT volume 2INT volume 3
1ONONOFF
2ONOFFOFF
3OFFOFFOFF
4OFFOFFON
5OFFONON
noteFor details of wiper volume dial position, refer to System Description.