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.

DTC TROUBLESHOOTING INDEX

Symptom	Diagnostic procedure
HDS does not communicate with the VSA modulator-control unit or the vehicle	Troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
VSA activation indicator does not come on at start-up (bulb check)	Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION ). Substitute a known-good VSA modulator-control unit, then retest. If it is OK, replace the original VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
VSA activation indicator does not go off, and no DTCs are stored	Do the steering angle sensor center point writing (see STEERING ANGLE SENSOR CENTER POINT WRITING ). Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ). Substitute a known-good VSA modulator-control unit, then retest. If it is OK, replace the original VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
ABS indicator, brake system indicator, and VSA indicator do not come on at the same time	Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION ). Substitute a known-good VSA modulator-control unit, then retest. If it is OK, replace the original VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
ABS indicator, brake system indicator, VSA indicator, and trailer stability assist warning do not go off at the same time	Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION ). Check for F-CAN DTCs, and troubleshoot and repair those first. Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING ).