Symptom Troubleshooting Index
When the vehicle has one of these symptoms, check for VSA diagnostic trouble codes (DTCs) with the HDS. If there are no DTCs, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.
SYMPTOM TROUBLESHOOTING REFERENCE TABLE
| Symptom |
Diagnostic procedure |
Also check for |
| 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
).
- Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE
), or substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION
), 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 (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION
).
|
- |
| VSA activation indicator does not go off, and no DTCs are stored |
- Symptom troubleshooting (see VSA ACTIVATION INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED
).
- Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE
), or substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION
), 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 (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION
).
|
- |
| ABS indicator, brake system indicator, and VSA indicator do not come on |
- Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION
).
- Update the VSA modulator-control unit if it does not have the latest software (see VSA MODULATOR-CONTROL UNIT UPDATE
), or substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION
), 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 (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION
).
|
- |
| ABS indicator, brake system indicator, and VSA indicator do not go off |
- Check for F-CAN DTCs, and troubleshoot and repair those first.
- Do the gauge control module troubleshooting (see SELF-DIAGNOSTIC FUNCTION
).
- Symptom troubleshooting (see ABS INDICATOR, BRAKE SYSTEM INDICATOR, AND VSA INDICATOR DO NOT GO OFF
).
|
- |