Multiplex Wake-up Test

WARNING: This page is about a different car, the 2006 Honda CR-V and 2005 Honda CR-V. However, it is still accessible from the selected car via links, so may be relevant.

From the sleep mode, wake-up the multiplex system by performing one of the following operations:

MULTIPLEX WAKE-UP OPERATION

Operation	Method used for wake up
Turn the ignition switch ON (II)	All multiplex units wake up simultaneously (regardless of ability to communicate)
Turn combination light switch to parking light position	Multiplex control unit wakes up the other units via communication lines.
Open the driver's door	Multiplex control unit wakes up the other units via communication lines.

As the system shifts to its active (wake-up) mode, communication wire voltage will return to 4-10 V and the battery terminal current will return to 70-80 mA.
If the system does not go into sleep mode or wake-up properly, perform the Multiplex Control Unit Input Test (see 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, it may mean that a control unit failed without triggering a DTC in mode 1. Perform the Multiplex Control Unit Input Test (see 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, the keyless receiver unit, or ECM/PCM one at a time. If the system works properly after swapping one of the components, replace the original component, it is faulty.