Multiplex Wake-up Mode Test

Multiplex Wake-up Mode Test




1. From the Sleep Mode, wake-up the multiplex system by performing one of the above operations.
2. As the system shifts to its Wake-up (Active) Mode, communication wire voltage will return to 4 - 10 V and the battery terminal current will return to 70 - 80 mA.
3. If the system does not go into Sleep Mode or Wake-up Mode properly, perform the Multiplex Control Unit Input Test.

NOTE: If multiple circuits fail to respond in the Mode 2 tests and/or the multiplex circuit fails to go into Sleep Mode or Wake-up Mode, it may mean that a control unit failed without triggering a DTC in Mode 1. Perform the Multiplex Control Unit Input Test.
If the input test confirms that all the inputs are working properly, substitute a known-good multiplex control unit, gauge assembly or ECM/PCM, one at a time. If the system works properly after swapping one of the above components, replace the original component.