DTC 3-4: Wheel Speed Signal Malfunction (From VSA Modulator-control Unit by F-CAN)

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If DTC 8-6 is stored at the same time as DTC 3-4, troubleshoot DTC 8-6 first, then recheck for DTC 3-4.

Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Test-drive the vehicle around corners at 10 mph (15 km/h)or more.
Check for DTCs with the HDS.
Is DTC 3-4 indicated?

YES -Go to step 6.

NO -Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting (see INTERMITTENT FAILURES ).
Check for VSA system DTCs with the DTS (see GENERAL TROUBLESHOOTING INFORMATION ).
Is any DTC indicated?

YES -Go to the indicated VSA system DTC's troubleshooting.

NO -Go to step 7.
Turn the ignition switch to LOCK (0).
Substitute a known-good active damper control unit (see ACTIVE DAMPER CONTROL UNIT REPLACEMENT ).
Turn the ignition switch to ON (II).
Clear the DTC with the HDS.
Turn the ignition switch to LOCK (0).
Test-drive the vehicle around corners at 10 mph (15 km/h) or more.
Check for DTCs with the HDS.
Is DTC 3-4 indicated?

YES -Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE ), then go to step 1 and recheck. If the VSA modulator-control unit was updated and DTCs are not indicated, troubleshooting is complete.

NO -Replace the original active damper control unit (see ACTIVE DAMPER CONTROL UNIT REPLACEMENT ).