Does the ACC indicator go off?
YES -
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
NO -
Go to step 5.
5. Check for DTCs with the HDS.
Is DTC 34, 35, or 36 indicated?
YES -
Go to step 6.
NO -
Troubleshoot the indicated DTC(s).?
6. With the brake pedal released, check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS.
Is there about 0.5 V?
YES -
Go to step 7.
NO -
Check the VSA system.?
7. Test the brake booster See: Brakes and Traction Control/Power Brake Assist/Vacuum Brake Booster/Testing and Inspection.
8. Start the engine, then press the brake pedal with about 314 N (32 kgf, 70.6 lbf) pressure.
9. Check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS.
Is there about 2.5 V?
YES -
Go to step 10.
NO -
Check the VSA system.?
10. Check the brake switch signal (BRAKE SW (N.O.)) with the HDS.
Does the indication show ON when the brake pedal is pressed, and show OFF when the brake pedal is released?
YES -
Check for loose or poor connections. If OK, update the ACC unit See: Cruise Control/Testing and Inspection/Programming and Relearning, then
recheck. If the ACC unit was already updated, replace the ACC unit See: Cruise Control/Cruise Control Module/Service and Repair.?
NO -
Go to step 11.
11. Check for DTCs with the HDS.
Is DTC 60, 110, or 111 indicated?
YES -
Troubleshoot the indicated DTC(s).?
NO -
Troubleshoot the brake pedal position switch signal circuit See: Powertrain Management/Computers and Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Brake Pedal Position Switch Signal Circuit Troubleshooting.?
