Status Wake Up

MOST control modules require high current during standby operation and must be disconnected or put in sleep mode to prevent the vehicle battery from being discharged. In case of a fault on the MOST network that continuously wakes up, the entire MOST bus will be woken up. The Control Display will wake up the CAN Bus and all the vehicle busses will be woken up. This will lead to battery discharge.

It is of great benefit to know which module initiated the wake up call. In order to find out which MOST node woke up the MOST bus, the following procedure is performed - In Control Unit Functions, press "STATUSWAKEUP"

Three different response are possible:

• Control Module woke up
• Control Module woken up
• Control Module not initialized

The Control Module with the status "Control Module woke up" is the module that woke up the rest of the MOST bus.

This diagnosis only informs which control module woke, not the reason for the wake up, diagnostic testing should be performed on the control module and related equipment.

Hints for Vehicle Equipment Identification

• CDC - Look on passenger side of dashboard above glovebox.
• Logic 7 - Look for speaker grills on rear doors Look on left side of trunk for large amp.
• MMC - Look on left side of trunk.