Control Unit: Testing and Inspection

Initialization of the VTM-4 Control Unit
Whenever the VTM-4 control unit is replaced, it must be initialized to make the 4WD system function. There are two methods used to initialize the VTM-4 control unit. One method is to use the Honda diagnostic system (HDS) with the appropriate software plugged into the 16P data link connector (DLC).
The other method is to initialize the VTM-4 control unit manually.

Initialization with the HDS.





1. With the ignition switch OFF, connect the HDS to the 16P DLC (A) behind the driver's dashboard lower cover.
2. Turn the ignition switch ON (II), and follow the prompts on the HDS screen.

NOTE: See the HDS help menu for specific instruction.

Manual Initialization:
1. Start the engine (the VTM-4 indicator comes on, and the VTM-4 lock indicator is off).
2. Apply the brakes, and move the shift lever to either the R, 1, or 2 position, then push the VTM-4 lock switch (the VTM-4 indicator stays on, and the VTM-4 lock indicator is on). The 4WD system is now in lock mode.
3. Turn the ignition switch off.





4. Turn the ignition switch ON (II) (the VTM-4 indicator and the VTM-4 lock indicator both come on for 4 seconds, then go off). The VTM-4 control unit is initialized.