Honda Multiplexing Board Worksheet

1. Multiplex control unit (DOOR)
    A15
    ▲▼ wire colour : Brown  
    Multiplex control unit (DRIVER's)
    A2
    ▲▼ wire colour : Pink
    Multiplex control unit (PASSENGER's)
    B9
2. Door
    Ground A12, A19  Left G401, G551  Right G581  wire colours : Black, Black
    Supply A1 Pink
    Driver's
    G B11, A14, G501, G401 Black, Black
    Supply A1 WHT/BLK, A12 Pink, A24
    Passenger's
    B22, A8, G501, G401, Black, Black
    Supply A24, A22 Yellow
3. To create a fault
    Door locking  (Doors will not close)
    From the honda multiplexing unit, the ignition turned on. When I turned on the door lock, It was not working with the side of unlock. At the same time, the other components were working properly.
4. Door locking Pin #B9 Gry, There was no power in the side of the door unlock.
5. Test mode 1 
There were no codes in the system.   
When the faults are detected, the system is not working without any signals, such as beep.
6. Test mode 1 does not give us any problems(no codes)
7. Communication line : Check for continuity

8. Passenger's unit : Pink wire 3.97v
    Door Driver's unit : Brown 3.97v
Therefore, the communication line is OK, and it should go to mode 2.

9. Passenger's
    Front passenger's door light S/W, Left rear door light S/W - good
    Driver's
    Combination S/W, Right rear door S/W - good
    Door
    Driver window, Front passenger's window, Rear passenger's window, Driver's door S/W - good,    The driver's  central locking S/W is fail.

10. Driver's central locking switch is not working. I could check that when the switches are normal, one beep sound is confirmed from test mode 2. However, fault portions in the system have no beep sound.
11. Multiplex control system power and ground test (door)

12. sleep mode
It takes at 10sec for operating sleep mode.
Ignition on : 7.67v, 11.37mA
sleep mode on : 4v, 2.37mA
The main purpose of the sleep mode is saving the power.
13.

14. When the switch was used with a wake-up, the voltage dropped with its operation.
After 10sec, when the sleep mode turned on, the voltage recovered normal condition at around 4v. However, the driver's locking switch is still not working.