Symptom Troubleshooting Index
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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 CHART
| 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
). |
- |
| ABS indicator, brake system indicator, VSA indicator, or VSA OFF indicator do 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 cannot be turned OFF |
- Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING
).
- 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 (see
GENERAL TROUBLESHOOTING INFORMATION
).
- Symptom troubleshooting (see SYMPTOM TROUBLESHOOTING
).
- Do the gauge control module troubleshooting (see
GENERAL TROUBLESHOOTING INFORMATION
).
|
- |
| VSA OFF indicator does not turn off |
Do the VSA sensor neutral position memorization (see Yaw Rate-Acceleration Sensor Replacement
) |
- |
| ABS indicator, brake system indicator, and VSA indicator do not go off |
Check for F-CAN DTC's, and troubleshoot and repair those first (see GENERAL TROUBLESHOOTING INFORMATION
).
Symptom troubleshooting (see ABS indicator, brake system indicator, and VSA indicator do not go off
). |
- |