DTC 91

DTC 91: VSA System
1. Check the brake system for leaks or mechanical problems.
Is the brake system OK? (No brake fluid leakage, no air trapped in the brake system, no brake pads worn out.)
YES - Go to step 2.
NO - Repair the brake system, then recheck.

2. Turn the ignition switch ON (II).
3. Clear the DTC with the HDS.
4. Test-drive the vehicle in a straight line. Accelerate the vehicle up to 6 mph (10 km/h), and stop, then accelerate up to 6 mph (10 km/).
5. Check for DTCs with the HDS.
Is DTC 91 indicated?
YES - Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G202. If necessary, substitute a known-good VSA modulator-control unit and retest.
NO - Intermittent failure, the system is OK at this time. Check for loose terminals at the VSA modulator-control unit 46P connector. Check for a loose connection at G202. Refer to intermittent failures troubleshooting.