Nissan Maxima Service and Repair Manual: Combination switch reading system
System Diagram
System Description
OUTLINE
- BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the status of each switch.
- BCM has a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5) and reads a maximum of 20 switch states.
COMBINATION SWITCH MATRIX
Combination switch INPUT-OUTPUT system list
COMBINATION SWITCH READING FUNCTION
Description
- BCM reads the status of the combination switch at 10ms intervals normally.
NOTE: BCM reads the status of the combination switch at 60ms intervals when BCM is controlled at low power consumption mode.
- BCM operates as follows and judges the status of the combination switch.
- It operates the transistor on OUTPUT side in the following order: OUTPUT 1 → 2 →3 →4 →5 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 - 5 to "1 - 5" and OUTPUT 1 - 5 to "A - E ".
Example 1: When a switch (TAIL LAMP) is turned ON
- The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP is turned ON.
- BCM detects the combination switch status signal "5D" when the signal of OUTPUT 4 is input to INPUT 5.
- BCM judges that the TAIL LAMP switch is ON when the signal "5D" is detected.
Example 2: When some switches (TRUN RH, TAIL LAMP) are turned ON
- The circuits between OUTPUT 1 and INPUT 5 and between OUTPUT 4 and INPUT 5 are formed when the TURN RH switch and TAIL LAMP switch are turned ON.
- BCM detects the combination switch status signal "5AD" when the signals of OUTPUT 1 and OUTPUT 4 are input to INPUT 5.
- BCM judges that the TURN RH switch and TAIL LAMP switch are ON when the signal "5AD" is detected.
WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)
BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2, and 3 switches.
Body control system
System Description
OUTLINE
ECU DIAGNOSIS INFORMATION controls the various electrical
components. It inputs the information required to
the control from CAN communication and the signal rece ...
Signal buffer system
System Diagram
System Description
OUTLINE
BCM has the signal transmission function that outputs/transmits each
input/received signal to each unit.
Signal transmission function list
...
Other materials:
Key slot illumination
Description
Blinks when Intelligent Key insertion is required.
Component Function Check
1.CHECK FUNCTION
With CONSULT
Check key slot illumination ("KEY SLOT ILLUMI") Active
Test mode.
Diagnosis Procedure
Regarding Wiring Diagram information, refer to SEC-147,
"Wiring Diagram" or SEC-128, ...
Doors
When the doors are locked using one of the
following methods, the doors cannot be opened
using the inside or outside door handles. The
doors must be unlocked to open the doors.
WARNING
Before opening any door, always look
for and avoid oncoming traffic.
To help avoid risk of injury or de ...
Parking lamp circuit
Description
The IPDM E/R (intelligent power distribution module engine room) controls the
tail lamp relay based on inputs from the BCM over the CAN communication
lines. When the tail lamp relay is energized, power flows through fuses 46
and 47, located in the IPDM E/R. Power then flows to the ...
Nissan Maxima Owners Manual
- Illustrated table of contents
- Safety-Seats, seat belts and supplemental restraint system
- Instruments and controls
- Pre-driving checks and adjustments
- Monitor, climate, audio, phone and voice recognition systems
- Starting and driving
- In case of emergency
- Appearance and care
- Do-it-yourself
- Maintenance and schedules
- Technical and consumer information
Nissan Maxima Service and Repair Manual
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