Symptom Troubleshooting Index

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

When the vehicle has one of these symptoms, check for a diagnostic trouble code (DTC) with the HDS. If there is no DTC, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.

SYMPTOM TROUBLESHOOTING CHART

Symptom	Diagnostic procedure
HDS does not communicate with the active damper control unit or the vehicle	Troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING )
Active damper system indicator does not come ON	Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION ) Substitute a known-good active damper control unit, then recheck. If it is OK, replace the original active damper control unit (see ACTIVE DAMPER CONTROL UNIT REPLACEMENT )
Active damper system indicator does not go off, and no DTCs are stored	Start the engine Symptom Troubleshooting (see SYMPTOM TROUBLESHOOTING ) Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION )
Active damper system switch does not work (damper mode cannot be selected)	Symptom Troubleshooting (see ACTIVE DAMPER SYSTEM SWITCH DOES NOT WORK (DAMPER MODE CANNOT BE SELECTED) )
Active damper system switch light blinks	Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION ) Substitute a known-good active damper control unit, then recheck. If it is OK, replace the original active damper control unit (see ACTIVE DAMPER CONTROL UNIT REPLACEMENT )