( TL19E00D52100000000HBAT00 )

VSA System Symptom Troubleshooting Index

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 | Diagnostic procedure
--- | ---
HDS does not communicate with the VSA modulator-control unit or the vehicle | Troubleshoot the DLC circuit: R20A3 engine model, K24Z3 engine model.
VSA activation indicator does not come on at start-up (bulb check) | 1. 2. | Do the gauge control module troubleshooting. Update the VSA modulator-control unit if it does not have the latest software, or substitute a known-good VSA modulator-control unit, then retest. If it is OK, the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit.
VSA activation indicator does not go off, and no DTCs are stored | 1. 2. | Symptom troubleshooting. Update the VSA modulator-control unit if it does not have the latest software, or substitute a known-good VSA modulator-control unit, then retest. If it is OK, the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit.
ABS indicator, brake system indicator, VSA indicator, and TSA warning do not come on at the same time | 1. 2. | Do the gauge control module troubleshooting. Update the VSA modulator-control unit if it does not have the latest software, or substitute a known-good VSA modulator-control unit, then retest. If it is OK, the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit.
ABS indicator, brake system indicator, VSA indicator, and TSA warning do not go off at the same time | 1. 2. 3. | Check for F-CAN DTCs, and troubleshoot and repair those first. Symptom troubleshooting. Do the gauge control module troubleshooting.