Symptom
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Diagnostic procedure
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HDS does not communicate with the VSA modulator-control unit or the vehicle
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VSA activation indicator does not come on at start-up (bulb check)
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1.
2.
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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.
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VSA activation indicator does not go off, and no DTCs are stored
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1.
2.
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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, and VSA indicator do not come on at the same time
|
1.
2.
|
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.
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ABS indicator, brake system indicator, and VSA indicator do not go off at the same time
|
1.
2.
3.
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Check for F-CAN DTCs, and troubleshoot and repair those first.
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