Multiplex Integrated Control System Sleep And Wake-Up Mode Test

Multiplex Integrated Control System Sleep and Wake-Up Mode Test

1. Shift to the sleep mode:

Close all doors, turn the ignition switch to LOCK (0), then open and close the driver's door. If the MICU receives no signals from the inputs listed below, it will go into sleep mode in less than 40 seconds.

- B-CAN data

- Hazard warning switch (OFF)

- Hatch glass opener switch (OFF)

- Driver's door hatch glass opener switch (OFF)

2. Confirm the sleep mode:

NOTE: Check any official Honda service website for more service information about parasitic draw at the battery.

Check the parasitic draw at the battery while shifting into the sleep mode; amperage should change from about
200 mA to less than 35 mA in less than 50 seconds.

3. Shift to the wake up mode:

When the ignition switch is turned to ON (II), the MICU, and all B-CAN system components wake up. When any switch in the multiplex integrated control system is turned on, a message is sent to the related control unit(s) to command the desired function. After confirming the sleep mode, look in the following table for the switch most related to the problem. Operate that switch and see if its control unit wakes up.

NOTE: If any control unit is faulty and will not wake up, several circuits in the system will malfunction at the same time. In the table, the control unit is followed by a list of the switches and input signals that can wake it up.

- B-CAN data

- Door switches (door open)

- Left rear door lock knob switch (UNLOCK)

- Right rear door lock knob switch (UNLOCK)

- Tailgate latch switch (Tailgate open)

- Tailgate outer handle switch (ON)

- Hatch glass latch switch (hatch glass open)

- Hatch glass opener switch (ON)

- Driver's door hatch glass opener switch (ON)

- Security hood switch (hood open)

- Audio unit switch (ON)

- Hazard warning switch (ON)

- Combination light switch (Parking, Headlight, Dimmer, Passing, Fog ON)

- Ignition key switch (key inserted)