Clearing Trouble Codes

How to Clear the VTM-4 Control Unit Memory
There are two methods used to clear DTCs from the VTM-4 control unit memory. One method is to use the Honda PGM Tester with the appropriate software plugged into the 16P Data Link Connector (DLC).
The other method is to connect the Service Check Signal (SCS) connector with the Honda PGM Tester, and manually clear the memory.

Honda PGM Tester method:





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

NOTE: See the Honda PGM Tester user's manual for specific instruction.

Service Check Signal Circuit (SCS) Method:
1. Park the vehicle on level ground. Shift to the P position, then turn off the engine.
2. Release the parking brake pedal.





3. With the ignition switch OFF, connect the Honda PGM Tester (A) to the 16P DLC (B) located behind the driver's dashboard lower cover.
4. Connect the SCS circuit to body ground using the Honda PGM Tester.
5. Turn the ignition switch ON (II).
6. The VTM-4 indicator light comes on and stays on for 4 seconds. Press and hold the VTM-4 lock switch in while the VTM-4 indicator light is on.
7. When the VTM-4 indicator light goes off, release the VTM-4 lock switch.
8. The VTM-4 indicator light comes on and stays on for 4 seconds. Press and hold the VTM-4 lock switch in while the VTM-4 indicator light is on.





9. When the VTM-4 indicator light goes off, release the VTM-4 lock switch. The VTM-4 indicator light will blink twice quickly to confirm that the DTCs have been cleared from the VTM-4 control unit memory.

NOTE: If the VTM-4 indicator light does not blink twice quickly, the memory has not been cleared. Turn the ignition switch off, then repeat step 5 through 9 again.

10. Turn the ignition switch OFF, then disconnect the Honda PGM Tester from the 16P DLC.

How to End a Troubleshooting Session (required after any troubleshooting)
1. Turn the ignition switch OFF.
2. Clear the DTCs from the VTM-4 control unit memory.
3. Disconnect the Honda PGM Tester from the 16P DLC.
4. Verify that the problem has been repaired; test driving the vehicle for several minutes in 4WD mode.