VSA Indicator Does Not Come On

VSA activation indicator does not come on
1. Turn the ignition switch ON (II), and watch the VSA activation indicator.
Does the VSA activation indicator come on for several seconds?
YES - The system is OK at this time.
NO - Go to step 2.
2. Apply the parking brake.
Does the brake system indicator come on?
YES - Go to step 3.
NO - Repair open in the indicator power source circuit.
3. Turn the ignition switch OFF.
4. Substitute a known-good VSA modulator-control unit.
5. Turn the ignition switch ON (II).
Does the VSA activation indicator come on?
YES - Replace the VSA modulator-control unit.
NO - Do the troubleshooting for the gauge control module.